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RE: [PATCH 1/2] [ARC] Generating code for profiling.
Committed with the suggested mods.
Thank you for your review,
Claudiu
> -----Original Message-----
> From: Andrew Burgess [mailto:andrew.burgess@embecosm.com]
> Sent: Wednesday, December 14, 2016 1:13 PM
> To: Claudiu Zissulescu <Claudiu.Zissulescu@synopsys.com>
> Cc: gcc-patches@gcc.gnu.org; Francois.Bedard@synopsys.com
> Subject: Re: [PATCH 1/2] [ARC] Generating code for profiling.
>
> * Claudiu Zissulescu <Claudiu.Zissulescu@synopsys.com> [2016-12-05
> 12:59:12 +0100]:
>
> > Remove old gmonlib from libgcc and reimplemnt profiling using UCB
> > counters.
> >
> > gcc/
> > 2016-07-28 Claudiu Zissulescu <claziss@synopsys.com>
> >
> > * config/arc/arc.h (LINK_SPEC): Tidy up.
> > (ENDFILE_SPEC): Likewise.
> > (LIB_SPEC): Likewise.
> > (STARTFILE_SPEC): Include gcrt0 when profiling.
> > (FUNCTION_PROFILER): Use __mcount.
> > * config/arc/arc.opt (mucb-mcount): Remove.
> > * doc/invoke.texi (ARC): Remove mucb-mcount doc.
> > * arc/arc-protos.h (arc_profile_call): Remove.
>
> I think the path here is wrong, and in some of the following entries
> as well.
>
>
> > * arc/arc.c (write_profile_sections): Likewise.
> > (arc_profile_call): Likewise.
> > (unspec_prof_hash): Likewise.
> > (unspec_prof_htab_eq): Likewise.
> > (arc_legitimate_constant_p): Remove UNSPEC_PROF.
> > (arc_reorg): Remove call to write_profile_sections.
> > * arc/arc.md (call): Remove call to arc_profile_call.
> > (call_value): Likewise.
> > (sibcall): Likewise.
> > (sibcall_value): Likewise.
> > (define_constants): Remove UNSPEC_PROF.
> >
> > libgcc/
> > 2016-07-28 Claudiu Zissulescu <claziss@synopsys.com>
> >
> > * config.host (arc*-*-linux-uclibc*): Remove libgmon, crtg, and
> > crtgend.
> > (arc*-*-elf*): Likewise.
> > * config/arc/t-arc: Remove old gmon lib targets.
> > * arc/crtg.S: Reomve.
>
> Again, paths are wrong here and in the following entries.
>
> > * arc/crtgend.S: Likewise.
> > * arc/gmon/atomic.h: Likewise.
> > * arc/gmon/auxreg.h: Likewise.
> > * arc/gmon/dcache_linesz.S: Likewise.
> > * arc/gmon/gmon.c: Likewise.
> > * arc/gmon/machine-gmon.h: Likewise.
> > * arc/gmon/mcount.c: Likewise.
> > * arc/gmon/prof-freq-stub.S: Likewise.
> > * arc/gmon/prof-freq.c: Likewise.
> > * arc/gmon/profil.S: Likewise.
> > * arc/gmon/sys/gmon.h: Likewise.
> > * arc/gmon/sys/gmon_out.h: Likewise.
> > * arc/t-arc-newlib: Likewise.
> > * arc/t-arc700-uClibc: Renamed to t-arc-uClibc.
>
>
> Otherwise, looks good.
>
> Thanks,
> Andrew
>
>
>
> > ---
> > gcc/config/arc/arc-protos.h | 1 -
> > gcc/config/arc/arc.c | 152 -----------
> > gcc/config/arc/arc.h | 28 +-
> > gcc/config/arc/arc.md | 35 +--
> > gcc/config/arc/arc.opt | 4 -
> > gcc/doc/invoke.texi | 8 +-
> > libgcc/config.host | 10 +-
> > libgcc/config/arc/crtg.S | 51 ----
> > libgcc/config/arc/crtgend.S | 33 ---
> > libgcc/config/arc/gmon/atomic.h | 26 --
> > libgcc/config/arc/gmon/auxreg.h | 35 ---
> > libgcc/config/arc/gmon/dcache_linesz.S | 57 ----
> > libgcc/config/arc/gmon/gmon.c | 450 --------------------------------
> > libgcc/config/arc/gmon/machine-gmon.h | 65 -----
> > libgcc/config/arc/gmon/mcount.c | 206 ---------------
> > libgcc/config/arc/gmon/prof-freq-stub.S | 40 ---
> > libgcc/config/arc/gmon/prof-freq.c | 60 -----
> > libgcc/config/arc/gmon/profil.S | 164 ------------
> > libgcc/config/arc/gmon/sys/gmon.h | 217 ---------------
> > libgcc/config/arc/gmon/sys/gmon_out.h | 55 ----
> > libgcc/config/arc/t-arc | 37 ---
> > libgcc/config/arc/t-arc-newlib | 22 --
> > libgcc/config/arc/t-arc-uClibc | 38 +++
> > libgcc/config/arc/t-arc700-uClibc | 40 ---
> > 24 files changed, 60 insertions(+), 1774 deletions(-)
> > delete mode 100644 libgcc/config/arc/crtg.S
> > delete mode 100644 libgcc/config/arc/crtgend.S
> > delete mode 100644 libgcc/config/arc/gmon/atomic.h
> > delete mode 100644 libgcc/config/arc/gmon/auxreg.h
> > delete mode 100644 libgcc/config/arc/gmon/dcache_linesz.S
> > delete mode 100644 libgcc/config/arc/gmon/gmon.c
> > delete mode 100644 libgcc/config/arc/gmon/machine-gmon.h
> > delete mode 100644 libgcc/config/arc/gmon/mcount.c
> > delete mode 100644 libgcc/config/arc/gmon/prof-freq-stub.S
> > delete mode 100644 libgcc/config/arc/gmon/prof-freq.c
> > delete mode 100644 libgcc/config/arc/gmon/profil.S
> > delete mode 100644 libgcc/config/arc/gmon/sys/gmon.h
> > delete mode 100644 libgcc/config/arc/gmon/sys/gmon_out.h
> > delete mode 100644 libgcc/config/arc/t-arc-newlib
> > create mode 100644 libgcc/config/arc/t-arc-uClibc
> > delete mode 100644 libgcc/config/arc/t-arc700-uClibc
> >
> > diff --git a/gcc/config/arc/arc-protos.h b/gcc/config/arc/arc-protos.h
> > index d0a4e80..014bb8f 100644
> > --- a/gcc/config/arc/arc-protos.h
> > +++ b/gcc/config/arc/arc-protos.h
> > @@ -68,7 +68,6 @@ extern bool
> arc_raw_symbolic_reference_mentioned_p (rtx, bool);
> > extern bool arc_legitimate_pic_operand_p (rtx);
> > extern bool arc_is_longcall_p (rtx);
> > extern bool arc_is_shortcall_p (rtx);
> > -extern bool arc_profile_call (rtx callee);
> > extern bool valid_brcc_with_delay_p (rtx *);
> > extern bool small_data_pattern (rtx , machine_mode);
> > extern rtx arc_rewrite_small_data (rtx);
> > diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
> > index 7c5f69b..780d20b 100644
> > --- a/gcc/config/arc/arc.c
> > +++ b/gcc/config/arc/arc.c
> > @@ -3734,97 +3734,6 @@ arc_print_operand_address (FILE *file , rtx addr)
> > }
> > }
> >
> > -/* Called via walk_stores. DATA points to a hash table we can use to
> > - establish a unique SYMBOL_REF for each counter, which corresponds to
> > - a caller-callee pair.
> > - X is a store which we want to examine for an UNSPEC_PROF, which
> > - would be an address loaded into a register, or directly used in a MEM.
> > - If we found an UNSPEC_PROF, if we encounter a new counter the first
> time,
> > - write out a description and a data allocation for a 32 bit counter.
> > - Also, fill in the appropriate symbol_ref into each UNSPEC_PROF instance.
> */
> > -
> > -static void
> > -write_profile_sections (rtx dest ATTRIBUTE_UNUSED, rtx x, void *data)
> > -{
> > - rtx *srcp, src;
> > - htab_t htab = (htab_t) data;
> > - rtx *slot;
> > -
> > - if (GET_CODE (x) != SET)
> > - return;
> > - srcp = &SET_SRC (x);
> > - if (MEM_P (*srcp))
> > - srcp = &XEXP (*srcp, 0);
> > - else if (MEM_P (SET_DEST (x)))
> > - srcp = &XEXP (SET_DEST (x), 0);
> > - src = *srcp;
> > - if (GET_CODE (src) != CONST)
> > - return;
> > - src = XEXP (src, 0);
> > - if (GET_CODE (src) != UNSPEC || XINT (src, 1) != UNSPEC_PROF)
> > - return;
> > -
> > - gcc_assert (XVECLEN (src, 0) == 3);
> > - if (!htab_elements (htab))
> > - {
> > - output_asm_insn (".section .__arc_profile_desc, \"a\"\n"
> > - "\t.long %0 + 1\n",
> > - &XVECEXP (src, 0, 0));
> > - }
> > - slot = (rtx *) htab_find_slot (htab, src, INSERT);
> > - if (*slot == HTAB_EMPTY_ENTRY)
> > - {
> > - static int count_nr;
> > - char buf[24];
> > - rtx count;
> > -
> > - *slot = src;
> > - sprintf (buf, "__prof_count%d", count_nr++);
> > - count = gen_rtx_SYMBOL_REF (Pmode, xstrdup (buf));
> > - XVECEXP (src, 0, 2) = count;
> > - output_asm_insn (".section\t.__arc_profile_desc, \"a\"\n"
> > - "\t.long\t%1\n"
> > - "\t.section\t.__arc_profile_counters, \"aw\"\n"
> > - "\t.type\t%o2, @object\n"
> > - "\t.size\t%o2, 4\n"
> > - "%o2:\t.zero 4",
> > - &XVECEXP (src, 0, 0));
> > - *srcp = count;
> > - }
> > - else
> > - *srcp = XVECEXP (*slot, 0, 2);
> > -}
> > -
> > -/* Hash function for UNSPEC_PROF htab. Use both the caller's name and
> > - the callee's name (if known). */
> > -
> > -static hashval_t
> > -unspec_prof_hash (const void *x)
> > -{
> > - const_rtx u = (const_rtx) x;
> > - const_rtx s1 = XVECEXP (u, 0, 1);
> > -
> > - return (htab_hash_string (XSTR (XVECEXP (u, 0, 0), 0))
> > - ^ (s1->code == SYMBOL_REF ? htab_hash_string (XSTR (s1, 0)) : 0));
> > -}
> > -
> > -/* Equality function for UNSPEC_PROF htab. Two pieces of UNSPEC_PROF
> rtl
> > - shall refer to the same counter if both caller name and callee rtl
> > - are identical. */
> > -
> > -static int
> > -unspec_prof_htab_eq (const void *x, const void *y)
> > -{
> > - const_rtx u0 = (const_rtx) x;
> > - const_rtx u1 = (const_rtx) y;
> > - const_rtx s01 = XVECEXP (u0, 0, 1);
> > - const_rtx s11 = XVECEXP (u1, 0, 1);
> > -
> > - return (!strcmp (XSTR (XVECEXP (u0, 0, 0), 0),
> > - XSTR (XVECEXP (u1, 0, 0), 0))
> > - && rtx_equal_p (s01, s11));
> > -}
> > -
> > /* Conditional execution support.
> >
> > This is based on the ARM port but for now is much simpler.
> > @@ -5562,7 +5471,6 @@ arc_legitimate_constant_p (machine_mode
> mode, rtx x)
> > case UNSPEC_TLS_GD:
> > case UNSPEC_TLS_IE:
> > case UNSPEC_TLS_OFF:
> > - case UNSPEC_PROF:
> > return true;
> >
> > default:
> > @@ -6483,47 +6391,6 @@ arc_is_shortcall_p (rtx sym_ref)
> >
> > }
> >
> > -/* Emit profiling code for calling CALLEE. Return true if a special
> > - call pattern needs to be generated. */
> > -
> > -bool
> > -arc_profile_call (rtx callee)
> > -{
> > - rtx from = XEXP (DECL_RTL (current_function_decl), 0);
> > -
> > - if (TARGET_UCB_MCOUNT)
> > - /* Profiling is done by instrumenting the callee. */
> > - return false;
> > -
> > - if (CONSTANT_P (callee))
> > - {
> > - rtx count_ptr
> > - = gen_rtx_CONST (Pmode,
> > - gen_rtx_UNSPEC (Pmode,
> > - gen_rtvec (3, from, callee,
> > - CONST0_RTX (Pmode)),
> > - UNSPEC_PROF));
> > - rtx counter = gen_rtx_MEM (SImode, count_ptr);
> > - /* ??? The increment would better be done atomically, but as there is
> > - no proper hardware support, that would be too expensive. */
> > - emit_move_insn (counter,
> > - force_reg (SImode, plus_constant (SImode, counter, 1)));
> > - return false;
> > - }
> > - else
> > - {
> > - rtx count_list_ptr
> > - = gen_rtx_CONST (Pmode,
> > - gen_rtx_UNSPEC (Pmode,
> > - gen_rtvec (3, from, CONST0_RTX
> (Pmode),
> > - CONST0_RTX (Pmode)),
> > - UNSPEC_PROF));
> > - emit_move_insn (gen_rtx_REG (Pmode, 8), count_list_ptr);
> > - emit_move_insn (gen_rtx_REG (Pmode, 9), callee);
> > - return true;
> > - }
> > -}
> > -
> > /* Worker function for TARGET_RETURN_IN_MEMORY. */
> >
> > static bool
> > @@ -6745,25 +6612,6 @@ arc_reorg (void)
> > cfun->machine->arc_reorg_started = 1;
> > arc_reorg_in_progress = 1;
> >
> > - /* Emit special sections for profiling. */
> > - if (crtl->profile)
> > - {
> > - section *save_text_section;
> > - rtx_insn *insn;
> > - int size = get_max_uid () >> 4;
> > - htab_t htab = htab_create (size, unspec_prof_hash,
> unspec_prof_htab_eq,
> > - NULL);
> > -
> > - save_text_section = in_section;
> > - for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
> > - if (NONJUMP_INSN_P (insn))
> > - walk_stores (PATTERN (insn), write_profile_sections, htab);
> > - if (htab_elements (htab))
> > - in_section = 0;
> > - switch_to_section (save_text_section);
> > - htab_delete (htab);
> > - }
> > -
> > /* Link up loop ends with their loop start. */
> > {
> > for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
> > diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h
> > index 802331f..9d1ad7b 100644
> > --- a/gcc/config/arc/arc.h
> > +++ b/gcc/config/arc/arc.h
> > @@ -121,12 +121,11 @@ extern const char *arc_cpu_to_as (int argc, const
> char **argv);
> > -X %{mbig-endian:-EB} \
> > %{EB} %{EL} \
> > %{marclinux*} \
> > - %{!marclinux*: %{pg|p|profile:-marclinux_prof;: -
> marclinux}} \
> > + %{!marclinux*: -marclinux} \
> > %{!z:-z max-page-size=0x2000 -z common-page-
> size=0x2000} \
> > %{shared:-shared}"
> > #else
> > -#define LINK_SPEC "%{mbig-endian:-EB} %{EB} %{EL}\
> > - %{pg|p:-marcelf_prof;mA7|mARC700|mcpu=arc700|mcpu=ARC700: -
> marcelf}"
> > +#define LINK_SPEC "%{mbig-endian:-EB} %{EB} %{EL}"
> > #endif
> >
> > #if DEFAULT_LIBC != LIBC_UCLIBC
> > @@ -135,7 +134,7 @@ extern const char *arc_cpu_to_as (int argc, const
> char **argv);
> > #define EXTRA_SPECS \
> > { "arc_tls_extra_start_spec", ARC_TLS_EXTRA_START_SPEC }, \
> >
> > -#define STARTFILE_SPEC "%{!shared:crt0.o%s} crti%O%s %{pg|p:crtg.o%s}
> " \
> > +#define STARTFILE_SPEC "%{pg|p:gcrt0.o%s}%{!pg:%{!p:crt0.o%s}}
> crti%O%s " \
> > "%(arc_tls_extra_start_spec) crtbegin.o%s"
> > #else
> > #define STARTFILE_SPEC
> \
> > @@ -143,7 +142,7 @@ extern const char *arc_cpu_to_as (int argc, const
> char **argv);
> > #endif
> >
> > #if DEFAULT_LIBC != LIBC_UCLIBC
> > -#define ENDFILE_SPEC "%{pg|p:crtgend.o%s} crtend.o%s crtn%O%s"
> > +#define ENDFILE_SPEC "crtend.o%s crtn%O%s"
> > #else
> > #define ENDFILE_SPEC
> \
> > LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC,
> ANDROID_ENDFILE_SPEC)
> > @@ -154,12 +153,11 @@ extern const char *arc_cpu_to_as (int argc, const
> char **argv);
> > #define LIB_SPEC \
> > "%{pthread:-lpthread} \
> > %{shared:-lc} \
> > - %{!shared:%{pg|p|profile:-lgmon -u profil --defsym __profil=profil} -lc}"
> > + %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
> > #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
> > #else
> > #undef LIB_SPEC
> > -/* -lc_p not present for arc-elf32-* : ashwin */
> > -#define LIB_SPEC "%{!shared:%{g*:-lg} %{pg|p:-lgmon} -lc}"
> > +#define LIB_SPEC "%{!shared:%{g*:-lg} -lc}"
> > #endif
> >
> > #ifndef DRIVER_ENDIAN_SELF_SPECS
> > @@ -916,12 +914,14 @@ extern int arc_initial_elimination_offset(int from,
> int to);
> > (OFFSET) = arc_initial_elimination_offset ((FROM), (TO))
> >
> > /* Output assembler code to FILE to increment profiler label # LABELNO
> > - for profiling a function entry.
> > - We actually emit the profiler code at the call site, so leave this one
> > - empty. */
> > -#define FUNCTION_PROFILER(FILE, LABELNO) \
> > - if (TARGET_UCB_MCOUNT) \
> > - fprintf (FILE, "\t%s\n", arc_output_libcall ("__mcount"))
> > + for profiling a function entry. */
> > +#define FUNCTION_PROFILER(FILE, LABELNO) \
> > + do { \
> > + if (flag_pic) \
> > + fprintf (FILE, "\tbl\t__mcount@plt\n"); \
> > + else \
> > + fprintf (FILE, "\tbl\t__mcount\n"); \
> > + } while (0);
> >
> > #define NO_PROFILE_COUNTERS 1
> >
> > diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
> > index db0e846..8e26238 100644
> > --- a/gcc/config/arc/arc.md
> > +++ b/gcc/config/arc/arc.md
> > @@ -9,7 +9,7 @@
> > ;; Saurabh Verma (saurabh.verma@codito.com)
> > ;; Ramana Radhakrishnan(ramana.radhakrishnan@codito.com)
> > ;;
> > -;; Profiling support and performance improvements by
> > +;; Performance improvements by
> > ;; Joern Rennecke (joern.rennecke@embecosm.com)
> > ;;
> >
> > @@ -165,9 +165,7 @@
> > ])
> >
> > (define_constants
> > - [(UNSPEC_PROF 18) ; profile callgraph counter
> > -
> > - (R0_REG 0)
> > + [(R0_REG 0)
> > (R1_REG 1)
> > (R2_REG 2)
> > (R3_REG 3)
> > @@ -4108,13 +4106,6 @@
> >
> > gcc_assert (MEM_P (operands[0]));
> > callee = XEXP (operands[0], 0);
> > - if (crtl->profile && arc_profile_call (callee))
> > - {
> > - emit_call_insn (gen_call_prof (gen_rtx_SYMBOL_REF (Pmode,
> > - \"_mcount_call\"),
> > - operands[1]));
> > - DONE;
> > - }
> > /* This is to decide if we should generate indirect calls by loading the
> > 32 bit address of the callee into a register before performing the
> > branch and link - this exposes cse opportunities.
> > @@ -4177,14 +4168,6 @@
> >
> > gcc_assert (MEM_P (operands[1]));
> > callee = XEXP (operands[1], 0);
> > - if (crtl->profile && arc_profile_call (callee))
> > - {
> > - emit_call_insn (gen_call_value_prof (operands[0],
> > - gen_rtx_SYMBOL_REF (Pmode,
> > - \"_mcount_call\"),
> > - operands[2]));
> > - DONE;
> > - }
> > /* See the comment in define_expand \"call\". */
> > if (GET_CODE (callee) != REG
> > && (GET_CODE (callee) == PLUS || arc_is_longcall_p (callee)))
> > @@ -4667,13 +4650,6 @@
> >
> > if (operands[2] == NULL_RTX)
> > operands[2] = const0_rtx;
> > - if (crtl->profile && arc_profile_call (callee))
> > - {
> > - emit_insn (gen_sibcall_prof
> > - (gen_rtx_SYMBOL_REF (Pmode, \"_mcount_call\"),
> > - operands[1], operands[2]));
> > - DONE;
> > - }
> > if (GET_CODE (callee) != REG
> > && (GET_CODE (callee) == PLUS || arc_is_longcall_p (callee)))
> > XEXP (operands[0], 0) = force_reg (Pmode, callee);
> > @@ -4693,13 +4669,6 @@
> >
> > if (operands[3] == NULL_RTX)
> > operands[3] = const0_rtx;
> > - if (crtl->profile && arc_profile_call (XEXP (operands[1], 0)))
> > - {
> > - emit_insn (gen_sibcall_value_prof
> > - (operands[0], gen_rtx_SYMBOL_REF (Pmode,
> \"_mcount_call\"),
> > - operands[2], operands[3]));
> > - DONE;
> > - }
> > if (GET_CODE (callee) != REG && arc_is_longcall_p (callee))
> > XEXP (operands[1], 0) = force_reg (Pmode, callee);
> > }"
> > diff --git a/gcc/config/arc/arc.opt b/gcc/config/arc/arc.opt
> > index 31b305b..ec4f055 100644
> > --- a/gcc/config/arc/arc.opt
> > +++ b/gcc/config/arc/arc.opt
> > @@ -409,10 +409,6 @@ mlra-priority-noncompact
> > Target RejectNegative Var(arc_lra_prioritytag,
> ARC_LRA_PRIORITY_NONCOMPACT)
> > Reduce priority for r0..r3 / r12..r15 with TARGET_REGISTER_PRIORITY.
> >
> > -mucb-mcount
> > -Target Report Var(TARGET_UCB_MCOUNT)
> > -instrument with mcount calls as in the ucb code.
> > -
> > ; backward-compatibility aliases, translated by DRIVER_SELF_SPECS
> >
> > mEA
> > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> > index 034ae98..30eb88f 100644
> > --- a/gcc/doc/invoke.texi
> > +++ b/gcc/doc/invoke.texi
> > @@ -609,7 +609,7 @@ Objective-C and Objective-C++ Dialects}.
> > -mcrc -mdsp-packa -mdvbf -mlock -mmac-d16 -mmac-24 -mrtsc -mswape
> @gol
> > -mtelephony -mxy -misize -mannotate-align -marclinux -marclinux_prof
> @gol
> > -mlong-calls -mmedium-calls -msdata @gol
> > --mucb-mcount -mvolatile-cache -mtp-regno=@var{regno} @gol
> > +-mvolatile-cache -mtp-regno=@var{regno} @gol
> > -malign-call -mauto-modify-reg -mbbit-peephole -mno-brcc @gol
> > -mcase-vector-pcrel -mcompact-casesi -mno-cond-exec -mearly-cbranchsi
> @gol
> > -mexpand-adddi -mindexed-loads -mlra -mlra-priority-none @gol
> > @@ -14623,12 +14623,6 @@ Do not generate sdata references. This is the
> default for tool chains
> > built for @w{@code{arc-linux-uclibc}} and @w{@code{arceb-linux-uclibc}}
> > targets.
> >
> > -@item -mucb-mcount
> > -@opindex mucb-mcount
> > -Instrument with mcount calls as used in UCB code. I.e. do the
> > -counting in the callee, not the caller. By default ARC instrumentation
> > -counts in the caller.
> > -
> > @item -mvolatile-cache
> > @opindex mvolatile-cache
> > Use ordinarily cached memory accesses for volatile references. This is the
> > diff --git a/libgcc/config.host b/libgcc/config.host
> > index b1a2be6..3152216 100644
> > --- a/libgcc/config.host
> > +++ b/libgcc/config.host
> > @@ -368,13 +368,13 @@ alpha*-dec-*vms*)
> > md_unwind_header=alpha/vms-unwind.h
> > ;;
> > arc*-*-elf*)
> > - tmake_file="arc/t-arc-newlib arc/t-arc"
> > - extra_parts="crti.o crtn.o crtend.o crtbegin.o crtendS.o crtbeginS.o
> libgmon.a crtg.o crtgend.o"
> > - extra_parts="${extra_parts} crttls.o"
> > + tmake_file="arc/t-arc"
> > + extra_parts="crti.o crtn.o crtend.o crtbegin.o crtendS.o crtbeginS.o"
> > + extra_parts="$extra_parts crttls.o"
> > ;;
> > arc*-*-linux-uclibc*)
> > - tmake_file="${tmake_file} t-slibgcc-libgcc t-slibgcc-nolc-override
> arc/t-arc700-uClibc arc/t-arc"
> > - extra_parts="$extra_parts crti.o crtn.o libgmon.a crtg.o crtgend.o"
> > + tmake_file="${tmake_file} t-slibgcc-libgcc t-slibgcc-nolc-override
> arc/t-arc-uClibc arc/t-arc"
> > + extra_parts="$extra_parts crti.o crtn.o"
> > extra_parts="$extra_parts crttls.o"
> > ;;
> > arm-wrs-vxworks)
> > diff --git a/libgcc/config/arc/crtg.S b/libgcc/config/arc/crtg.S
> > deleted file mode 100644
> > index ca3cfb6..0000000
> > --- a/libgcc/config/arc/crtg.S
> > +++ /dev/null
> > @@ -1,51 +0,0 @@
> > -/* Code to start and stop profiling for the Synopsys DesignWare ARC CPU.
> > -
> > - Copyright (C) 1994-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > - .section .init
> > - .global _init
> > - .global _fini
> > - .global __monstartup
> > - mov_s r0,_init
> > - mov_s r1,_fini
> > - jl __monstartup
> > -
> > - .section .__arc_profile_desc, "a"
> > - .global __arc_profile_desc_secstart
> > - .balign 4
> > -__arc_profile_desc_secstart:
> > - .section .__arc_profile_forward, "a"
> > - .global __arc_profile_forward_secstart
> > - .balign 4
> > -__arc_profile_forward_secstart:
> > - .section .__arc_profile_counters, "aw"
> > - .global __arc_profile_counters_secstart
> > - .balign 4
> > -__arc_profile_counters_secstart:
> > -
> > - .section .fini
> > - .global _mcleanup
> > - jl _mcleanup
> > diff --git a/libgcc/config/arc/crtgend.S b/libgcc/config/arc/crtgend.S
> > deleted file mode 100644
> > index fad630f..0000000
> > --- a/libgcc/config/arc/crtgend.S
> > +++ /dev/null
> > @@ -1,33 +0,0 @@
> > -/* Code to start and stop profiling for the Synopsys DesignWare ARC CPU.
> > -
> > - Copyright (C) 1994-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > - .section .__arc_profile_desc, "a"
> > - .global __arc_profile_desc_secend
> > -__arc_profile_desc_secend:
> > - .section .__arc_profile_forward, "a"
> > - .global __arc_profile_forward_secend
> > -__arc_profile_forward_secend:
> > diff --git a/libgcc/config/arc/gmon/atomic.h
> b/libgcc/config/arc/gmon/atomic.h
> > deleted file mode 100644
> > index 049aa52..0000000
> > --- a/libgcc/config/arc/gmon/atomic.h
> > +++ /dev/null
> > @@ -1,26 +0,0 @@
> > -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -/* File deliberately left blank. */
> > diff --git a/libgcc/config/arc/gmon/auxreg.h
> b/libgcc/config/arc/gmon/auxreg.h
> > deleted file mode 100644
> > index 5210ea0..0000000
> > --- a/libgcc/config/arc/gmon/auxreg.h
> > +++ /dev/null
> > @@ -1,35 +0,0 @@
> > -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -#define LP_START 0x02
> > -#define LP_END 0x03
> > -#define IDENTITY 0x04
> > -#define STATUS32 0x0a
> > -#define COUNT0 0x21 /* Timer 0 count */
> > -#define CONTROL0 0x22 /* Timer 0 control */
> > -#define LIMIT0 0x23 /* Timer 0 limit */
> > -#define INT_VECTOR_BASE 0x25
> > -#define D_CACHE_BUILD 0x72
> > -#define DC_FLDL 0x4c
> > diff --git a/libgcc/config/arc/gmon/dcache_linesz.S
> b/libgcc/config/arc/gmon/dcache_linesz.S
> > deleted file mode 100644
> > index 29572ae..0000000
> > --- a/libgcc/config/arc/gmon/dcache_linesz.S
> > +++ /dev/null
> > @@ -1,57 +0,0 @@
> > -/* This file contains code to do profiling.
> > -
> > - Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -#include "../asm.h"
> > -#include "auxreg.h"
> > -/* This file contains code to do profiling. */
> > - .weak __profile_timer_cycles
> > - .global __profile_timer_cycles
> > - .set __profile_timer_cycles, 200
> > - .text
> > - ; For Arctangent-A5, if no data cache is present, a read of the
> > - ; cache build register returns the ID register. For ARC600 and
> > - ; later, the version field will be zero.
> > - .global __dcache_linesz
> > - .balign 4
> > -__dcache_linesz:
> > -#if !defined (__EM__) && !defined (__HS__)
> > - lr r12,[D_CACHE_BUILD]
> > - extb_s r0,r12
> > - breq_s r0,0,.Lsz_nocache
> > - brge r0,0x20,.Lsz_havecache
> > - lr r0,[IDENTITY]
> > - breq r12,r0,.Lsz_nocache
> > -.Lsz_havecache:
> > - lsr_s r12,r12,16
> > - mov_s r0,16
> > - bmsk_s r12,r12,3
> > - asl_s r0,r0,r12
> > - j_s [blink]
> > -.Lsz_nocache:
> > -#endif /* !__EM__ && !__HS__ */
> > - mov_s r0,1
> > - j_s [blink]
> > diff --git a/libgcc/config/arc/gmon/gmon.c
> b/libgcc/config/arc/gmon/gmon.c
> > deleted file mode 100644
> > index 82c09b0..0000000
> > --- a/libgcc/config/arc/gmon/gmon.c
> > +++ /dev/null
> > @@ -1,450 +0,0 @@
> > -/*-
> > - * Copyright (c) 1983, 1992, 1993
> > - * The Regents of the University of California. All rights reserved.
> > - * Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - *
> > - * Redistribution and use in source and binary forms, with or without
> > - * modification, are permitted provided that the following conditions
> > - * are met:
> > - * 1. Redistributions of source code must retain the above copyright
> > - * notice, this list of conditions and the following disclaimer.
> > - * 2. Redistributions in binary form must reproduce the above copyright
> > - * notice, this list of conditions and the following disclaimer in the
> > - * documentation and/or other materials provided with the distribution.
> > - * 4. Neither the name of the University nor the names of its contributors
> > - * may be used to endorse or promote products derived from this
> software
> > - * without specific prior written permission.
> > - *
> > - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS
> IS'' AND
> > - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> PARTICULAR PURPOSE
> > - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
> BE LIABLE
> > - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> CONSEQUENTIAL
> > - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> SUBSTITUTE GOODS
> > - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> INTERRUPTION)
> > - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT, STRICT
> > - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> IN ANY WAY
> > - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> POSSIBILITY OF
> > - * SUCH DAMAGE.
> > - */
> > -#if 0
> > -#include <sys/param.h>
> > -#include <sys/time.h>
> > -#endif
> > -#include <sys/gmon.h>
> > -#include <sys/gmon_out.h>
> > -
> > -#include <stddef.h>
> > -#include <errno.h>
> > -#include <stdio.h>
> > -#include <fcntl.h>
> > -#include <unistd.h>
> > -
> > -#include <stdio.h>
> > -#include <stdlib.h>
> > -#include <string.h>
> > -#include <unistd.h>
> > -#if 0
> > -#include <libc-internal.h>
> > -#include <not-cancel.h>
> > -
> > -#ifdef USE_IN_LIBIO
> > -# include <wchar.h>
> > -#endif
> > -#endif
> > -#define internal_function
> > -#define weak_alias(fun,aliasid) extern __typeof(fun) aliasid __attribute__
> ((weak, alias (#fun)));
> > -#define __libc_enable_secure 0
> > -
> > -/* Head of basic-block list or NULL. */
> > -struct __bb *__bb_head attribute_hidden;
> > -
> > -struct gmonparam _gmonparam attribute_hidden = { GMON_PROF_OFF
> };
> > -
> > -/*
> > - * See profil(2) where this is described:
> > - */
> > -static int s_scale;
> > -#define SCALE_1_TO_1 0x10000L
> > -
> > -#define ERR(s) write (STDERR_FILENO, s, sizeof (s) - 1)
> > -
> > -void moncontrol (int mode);
> > -void __moncontrol (int mode);
> > -static void write_hist (int fd) internal_function;
> > -static void write_call_graph (int fd) internal_function;
> > -static void write_bb_counts (int fd) internal_function;
> > -
> > -/*
> > - * Control profiling
> > - * profiling is what mcount checks to see if
> > - * all the data structures are ready.
> > - */
> > -void
> > -__moncontrol (int mode)
> > -{
> > - struct gmonparam *p = &_gmonparam;
> > -
> > - /* Don't change the state if we ran into an error. */
> > - if (p->state == GMON_PROF_ERROR)
> > - return;
> > -
> > - if (mode)
> > - {
> > - /* start */
> > - __profil((void *) p->kcount, p->kcountsize, p->lowpc, s_scale);
> > - p->state = GMON_PROF_ON;
> > - }
> > - else
> > - {
> > - /* stop */
> > - __profil(NULL, 0, 0, 0);
> > - p->state = GMON_PROF_OFF;
> > - }
> > -}
> > -weak_alias (__moncontrol, moncontrol)
> > -
> > -
> > -void
> > -__monstartup (u_long lowpc, u_long highpc)
> > -{
> > - register int o;
> > - char *cp;
> > - struct gmonparam *p = &_gmonparam;
> > - int linesz;
> > -
> > - /*
> > - * round lowpc and highpc to multiples of the density we're using
> > - * so the rest of the scaling (here and in gprof) stays in ints.
> > - */
> > - p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION *
> sizeof(HISTCOUNTER));
> > - if (sizeof *p->froms % sizeof(HISTCOUNTER) != 0)
> > - {
> > - p->highpc = ROUNDUP(highpc, HISTFRACTION *
> sizeof(HISTCOUNTER));
> > - p->textsize = p->highpc - p->lowpc;
> > - p->kcountsize = ROUNDUP((p->textsize + HISTFRACTION - 1) /
> HISTFRACTION,
> > - sizeof (*p->froms));
> > - }
> > - else
> > - {
> > - /* Avoid odd scales by rounding up highpc to get kcountsize rounded.
> */
> > - p->textsize = ROUNDUP (highpc - p->lowpc,
> > - HISTFRACTION * sizeof (*p->froms));
> > - p->highpc = p->lowpc + p->textsize;
> > - p->kcountsize = p->textsize / HISTFRACTION;
> > - }
> > - p->hashfraction = HASHFRACTION;
> > - p->log_hashfraction = -1;
> > - /* The following test must be kept in sync with the corresponding
> > - test in mcount.c. */
> > - if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) {
> > - /* if HASHFRACTION is a power of two, mcount can use shifting
> > - instead of integer division. Precompute shift amount. */
> > - p->log_hashfraction = ffs(p->hashfraction * sizeof(*p->froms)) - 1;
> > - }
> > - p->tolimit = p->textsize * ARCDENSITY / 100;
> > - if (p->tolimit < MINARCS)
> > - p->tolimit = MINARCS;
> > - else if (p->tolimit > MAXARCS)
> > - p->tolimit = MAXARCS;
> > - p->tossize = p->tolimit * sizeof(struct tostruct);
> > -
> > - /* p->kcount must not share cache lines with the adjacent data, because
> > - we use uncached accesses while profiling. */
> > - linesz = __dcache_linesz ();
> > - cp = calloc (ROUNDUP (p->kcountsize, linesz) + p->tossize
> > - + (linesz - 1), 1);
> > - if (! cp)
> > - {
> > - ERR("monstartup: out of memory\n");
> > - p->tos = NULL;
> > - p->state = GMON_PROF_ERROR;
> > - /* In case we loose the error state due to a race,
> > - prevent invalid writes also by clearing tolimit. */
> > - p->tolimit = 0;
> > - return;
> > - }
> > - p->tos = (struct tostruct *)cp;
> > - cp += p->tossize;
> > - cp = (char *) ROUNDUP ((ptrdiff_t) cp, linesz);
> > - p->kcount = (HISTCOUNTER *)cp;
> > - cp += ROUNDUP (p->kcountsize, linesz);
> > -
> > - p->tos[0].link = 0;
> > -
> > - o = p->highpc - p->lowpc;
> > - if (p->kcountsize < (u_long) o)
> > - {
> > -#ifndef hp300
> > - s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1;
> > -#else
> > - /* avoid floating point operations */
> > - int quot = o / p->kcountsize;
> > -
> > - if (quot >= 0x10000)
> > - s_scale = 1;
> > - else if (quot >= 0x100)
> > - s_scale = 0x10000 / quot;
> > - else if (o >= 0x800000)
> > - s_scale = 0x1000000 / (o / (p->kcountsize >> 8));
> > - else
> > - s_scale = 0x1000000 / ((o << 8) / p->kcountsize);
> > -#endif
> > - } else
> > - s_scale = SCALE_1_TO_1;
> > -
> > - __moncontrol(1);
> > -}
> > -weak_alias (__monstartup, monstartup)
> > -
> > -
> > -static void
> > -internal_function
> > -write_hist (int fd)
> > -{
> > - u_char tag = GMON_TAG_TIME_HIST;
> > - struct arc_gmon_hist_hdr thdr __attribute__ ((aligned (__alignof__ (char
> *))));
> > - int r;
> > -
> > - if (_gmonparam.kcountsize > 0)
> > - {
> > - *(char **) thdr.low_pc = (char *) _gmonparam.lowpc;
> > - *(char **) thdr.high_pc = (char *) _gmonparam.highpc;
> > - *(int32_t *) thdr.hist_size = (_gmonparam.kcountsize
> > - / sizeof (HISTCOUNTER));
> > - *(int32_t *) thdr.prof_rate = __profile_frequency ();
> > - strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen));
> > - thdr.dimen_abbrev = 's';
> > -
> > - r = write (fd, &tag, sizeof tag);
> > - if (r != sizeof tag)
> > - return;
> > - r = write (fd, &thdr, sizeof thdr);
> > - if (r != sizeof thdr)
> > - return;
> > - r = write (fd,_gmonparam.kcount, _gmonparam.kcountsize);
> > - if ((unsigned) r != _gmonparam.kcountsize)
> > - return;
> > - }
> > -}
> > -
> > -
> > -static void
> > -internal_function
> > -write_call_graph (int fd)
> > -{
> > -#define NARCS_PER_WRITE 64
> > -#define BYTES_PER_ARC (1 + sizeof (struct gmon_cg_arc_record))
> > -#define BYTES_PER_WRITE (BYTES_PER_ARC * NARCS_PER_WRITE)
> > - ARCINDEX to_index;
> > - u_long frompc, selfpc, count;
> > - char buffer[BYTES_PER_WRITE], *p;
> > - u_long *prof_desc = __arc_profile_desc_secstart;
> > - u_long *prof_count = __arc_profile_counters_secstart;
> > - u_long *prof_desc_end = __arc_profile_desc_secend;
> > - u_long *prof_forward = __arc_profile_forward_secstart;
> > -
> > - for (p = buffer; p < buffer + BYTES_PER_WRITE; p += BYTES_PER_ARC)
> > - *p = GMON_TAG_CG_ARC;
> > - p = buffer;
> > - frompc = *prof_desc++ & -2;
> > - while (prof_desc < prof_desc_end)
> > - {
> > - selfpc = *prof_desc++;
> > - if (selfpc & 1)
> > - {
> > - frompc = selfpc & -2;
> > - selfpc = *prof_desc++;
> > - }
> > - count = *prof_count++;
> > - if (selfpc)
> > - {
> > - struct arc
> > - {
> > - char *frompc;
> > - char *selfpc;
> > - int32_t count;
> > - }
> > - arc;
> > -
> > - if (!count)
> > - continue;
> > - arc.frompc = (char *) frompc;
> > - arc.selfpc = (char *) selfpc;
> > - arc.count = count;
> > - memcpy (p + 1, &arc, sizeof arc);
> > - p += 1 + sizeof arc;
> > -
> > - if (p == buffer + BYTES_PER_WRITE)
> > - {
> > - write (fd, buffer, BYTES_PER_WRITE);
> > - p = buffer;
> > - }
> > - }
> > - else
> > - {
> > - for (to_index = count;
> > - to_index != 0;
> > - to_index = _gmonparam.tos[to_index].link)
> > - {
> > - struct arc
> > - {
> > - char *frompc;
> > - char *selfpc;
> > - int32_t count;
> > - }
> > - arc;
> > -
> > - arc.frompc = (char *) frompc;
> > - arc.selfpc = (char *) _gmonparam.tos[to_index].selfpc;
> > - arc.count = _gmonparam.tos[to_index].count;
> > - memcpy (p + 1, &arc, sizeof arc);
> > - p += 1 + sizeof arc;
> > -
> > - if (p == buffer + BYTES_PER_WRITE)
> > - {
> > - write (fd, buffer, BYTES_PER_WRITE);
> > - p = buffer;
> > - }
> > - }
> > - }
> > - }
> > - while (prof_forward < __arc_profile_forward_secend)
> > - {
> > - /* ??? The 'call count' is actually supposed to be a fixed point
> > - factor, with 16 bits each before and after the point.
> > - It would be much nicer if we figured out the actual number
> > - of calls to the caller, and multiplied that with the fixed point
> > - factor to arrive at the estimated calls for the callee. */
> > - memcpy (p + 1, prof_forward, 3 * sizeof *prof_forward);
> > - prof_forward += 3;
> > - p += 1 + 3 * sizeof *prof_forward;
> > - if (p == buffer + BYTES_PER_WRITE)
> > - {
> > - write (fd, buffer, BYTES_PER_WRITE);
> > - p = buffer;
> > - }
> > - }
> > - if (p != buffer)
> > - write (fd, buffer, p - buffer);
> > -}
> > -
> > -
> > -static void
> > -internal_function
> > -write_bb_counts (int fd)
> > -{
> > - struct __bb *grp;
> > - u_char tag = GMON_TAG_BB_COUNT;
> > - size_t ncounts;
> > - size_t i;
> > -
> > - struct { unsigned long address; long count; } bbbody[8];
> > - size_t nfilled;
> > -
> > - /* Write each group of basic-block info (all basic-blocks in a
> > - compilation unit form a single group). */
> > -
> > - for (grp = __bb_head; grp; grp = grp->next)
> > - {
> > - ncounts = grp->ncounts;
> > - write (fd, &tag, 1);
> > - write (fd, &ncounts, sizeof ncounts);
> > - for (nfilled = i = 0; i < ncounts; ++i)
> > - {
> > - if (nfilled == sizeof (bbbody) / sizeof (bbbody[0]))
> > - {
> > - write (fd, bbbody, sizeof bbbody);
> > - nfilled = 0;
> > - }
> > -
> > - bbbody[nfilled].address = grp->addresses[i];
> > - bbbody[nfilled++].count = grp->counts[i];
> > - }
> > - if (nfilled > 0)
> > - write (fd, bbbody, nfilled * sizeof bbbody[0]);
> > - }
> > -}
> > -
> > -
> > -static void
> > -write_gmon (void)
> > -{
> > - struct gmon_hdr ghdr __attribute__ ((aligned (__alignof__ (int))));
> > - int fd = -1;
> > - char *env;
> > -
> > -#ifndef O_NOFOLLOW
> > -# define O_NOFOLLOW 0
> > -#endif
> > -
> > - env = getenv ("GMON_OUT_PREFIX");
> > - if (env != NULL && !__libc_enable_secure)
> > - {
> > - size_t len = strlen (env);
> > - char buf[len + 20];
> > - snprintf (buf, sizeof (buf), "%s.%u", env, getpid ());
> > - fd = open (buf, O_CREAT|O_TRUNC|O_WRONLY|O_NOFOLLOW,
> 0666);
> > - }
> > -
> > - if (fd == -1)
> > - {
> > - fd = open ("gmon.out",
> O_CREAT|O_TRUNC|O_WRONLY|O_NOFOLLOW,
> > - 0666);
> > - if (fd < 0)
> > - {
> > - perror ("_mcleanup: gmon.out");
> > - return;
> > - }
> > - }
> > -
> > - /* write gmon.out header: */
> > - memset (&ghdr, '\0', sizeof (struct gmon_hdr));
> > - memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie));
> > - *(int32_t *) ghdr.version = GMON_VERSION;
> > - write (fd, &ghdr, sizeof (struct gmon_hdr));
> > -
> > - /* write PC histogram: */
> > - write_hist (fd);
> > -
> > - /* write call-graph: */
> > - write_call_graph (fd);
> > -
> > - /* write basic-block execution counts: */
> > - write_bb_counts (fd);
> > -
> > - close (fd);
> > -}
> > -
> > -
> > -void
> > -__write_profiling (void)
> > -{
> > - int save = _gmonparam.state;
> > - _gmonparam.state = GMON_PROF_OFF;
> > - if (save == GMON_PROF_ON)
> > - write_gmon ();
> > - _gmonparam.state = save;
> > -}
> > -#ifndef SHARED
> > -/* This symbol isn't used anywhere in the DSO and it is not exported.
> > - This would normally mean it should be removed to get the same API
> > - in static libraries. But since profiling is special in static libs
> > - anyway we keep it. But not when building the DSO since some
> > - quality assurance tests will otherwise trigger. */
> > -weak_alias (__write_profiling, write_profiling)
> > -#endif
> > -
> > -
> > -void
> > -_mcleanup (void)
> > -{
> > - __moncontrol (0);
> > -
> > - if (_gmonparam.state != GMON_PROF_ERROR)
> > - write_gmon ();
> > -
> > - /* free the memory. */
> > - if (_gmonparam.tos != NULL)
> > - free (_gmonparam.tos);
> > -}
> > diff --git a/libgcc/config/arc/gmon/machine-gmon.h
> b/libgcc/config/arc/gmon/machine-gmon.h
> > deleted file mode 100644
> > index e7549ae..0000000
> > --- a/libgcc/config/arc/gmon/machine-gmon.h
> > +++ /dev/null
> > @@ -1,65 +0,0 @@
> > -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -#ifndef MACHINE_GMON_H
> > -#define MACHINE_GMON_H
> > -
> > -/* We can't fake out own <sys/types.h> header because the newlib /
> uclibc
> > - headers in GCC_FOR_TARGET take precedence. */
> > -
> > -#define __BEGIN_DECLS
> > -#define __END_DECLS
> > -
> > -#define __THROW
> > -
> > -extern int __dcache_linesz (void);
> > -
> > -#define _MCOUNT_DECL(countp, selfpc) \
> > - static inline void _mcount_internal (void *countp, u_long selfpc)
> > -
> > -extern void _mcount (void);
> > -extern void _mcount_call (void);
> > -
> > -/* N.B.: the calling point might be a sibcall, thus blink does not necessarily
> > - hold the caller's address. r8 doesn't hold the caller's address, either,
> > - but rather a pointer to the counter data structure associated with the
> > - caller.
> > - This function must be compiled with optimization turned on in order to
> > - enable a sibcall for the final call to selfpc; this is important when trying
> > - to profile a program with deep tail-recursion that would get a stack
> > - overflow otherwise. */
> > -#define MCOUNT \
> > -void \
> > -_mcount_call (void) \
> > -{ \
> > - register void *countp __asm("r8"); \
> > - register u_long selfpc __asm("r9"); \
> > - _mcount_internal (countp, selfpc); \
> > - ((void (*)(void)) selfpc) (); \
> > -}
> > -
> > -extern int __profil (u_short *,size_t, size_t, u_int);
> > -
> > -#endif /* MACHINE_GMON_H */
> > diff --git a/libgcc/config/arc/gmon/mcount.c
> b/libgcc/config/arc/gmon/mcount.c
> > deleted file mode 100644
> > index 8afca36..0000000
> > --- a/libgcc/config/arc/gmon/mcount.c
> > +++ /dev/null
> > @@ -1,206 +0,0 @@
> > -/*-
> > - * Copyright (c) 1983, 1992, 1993
> > - * The Regents of the University of California. All rights reserved.
> > - *
> > - * Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - *
> > - * Redistribution and use in source and binary forms, with or without
> > - * modification, are permitted provided that the following conditions
> > - * are met:
> > - * 1. Redistributions of source code must retain the above copyright
> > - * notice, this list of conditions and the following disclaimer.
> > - * 2. Redistributions in binary form must reproduce the above copyright
> > - * notice, this list of conditions and the following disclaimer in the
> > - * documentation and/or other materials provided with the distribution.
> > - * 4. Neither the name of the University nor the names of its contributors
> > - * may be used to endorse or promote products derived from this
> software
> > - * without specific prior written permission.
> > - *
> > - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS
> IS'' AND
> > - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> PARTICULAR PURPOSE
> > - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
> BE LIABLE
> > - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> CONSEQUENTIAL
> > - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> SUBSTITUTE GOODS
> > - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> INTERRUPTION)
> > - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT, STRICT
> > - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> IN ANY WAY
> > - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> POSSIBILITY OF
> > - * SUCH DAMAGE.
> > - */
> > -
> > -#if !defined(lint) && !defined(KERNEL) && defined(LIBC_SCCS)
> > -static char sccsid[] = "@(#)mcount.c 8.1 (Berkeley) 6/4/93";
> > -#endif
> > -
> > -#if 0
> > -#include <unistd.h>
> > -#include <sys/param.h>
> > -#endif
> > -#include <sys/gmon.h>
> > -
> > -/* This file provides the machine-dependent definitions of the
> _MCOUNT_DECL
> > - and MCOUNT macros. */
> > -#include <machine-gmon.h>
> > -
> > -#include <atomic.h>
> > -
> > -/*
> > - * mcount is called on entry to each function compiled with the profiling
> > - * switch set. _mcount(), which is declared in a machine-dependent way
> > - * with _MCOUNT_DECL, does the actual work and is either inlined into a
> > - * C routine or called by an assembly stub. In any case, this magic is
> > - * taken care of by the MCOUNT definition in <machine/profile.h>.
> > - *
> > - * _mcount updates data structures that represent traversals of the
> > - * program's call graph edges. frompc and selfpc are the return
> > - * address and function address that represents the given call graph edge.
> > - *
> > - * Note: the original BSD code used the same variable (frompcindex) for
> > - * both frompcindex and frompc. Any reasonable, modern compiler will
> > - * perform this optimization.
> > - */
> > -_MCOUNT_DECL(count_ptr, selfpc) /* _mcount; may be static, inline, etc
> */
> > -{
> > - register ARCINDEX *frompcindex;
> > - register struct tostruct *top, *prevtop;
> > - register struct gmonparam *p;
> > - register ARCINDEX toindex;
> > -
> > - /* Check for nested function trampoline. */
> > - if (selfpc & 2)
> > - selfpc = *(u_long *) (selfpc + 10);
> > -
> > - p = &_gmonparam;
> > - /*
> > - * check that we are profiling
> > - * and that we aren't recursively invoked.
> > - */
> > -#if 0
> > - if (catomic_compare_and_exchange_bool_acq (&p->state,
> GMON_PROF_BUSY,
> > - GMON_PROF_ON))
> > - return;
> > -#elif defined (__ARC700__)
> > -/* ??? This could temporarily lose the ERROR / OFF condition in a race,
> > - but doing an actual compare_and_exchange would be too costly. It
> would
> > - be better if we had a semaphore independent of the 'sticky' state, but
> > - then we could run into ABI compatibility problems with the size of struct
> > - gmonparam. */
> > - {
> > - u_long old_state;
> > -
> > - __asm ("ex %0,%1": "=r" (old_state), "+m" (p->state)
> > - : "0" (GMON_PROF_BUSY));
> > - if (old_state != GMON_PROF_ON)
> > - {
> > - switch (old_state)
> > - {
> > - case GMON_PROF_OFF:
> > - __asm ("ex %0,%1": "+r" (old_state), "+m" (p->state));
> > - if (old_state == GMON_PROF_BUSY
> > - /* Switching off while we say we are busy while profiling
> > - was actually already switched off is all right. */
> > - || old_state == GMON_PROF_OFF)
> > - break;
> > - /* It is not clear if we should allow switching on
> > - profiling at this point, and how to handle further races.
> > - For now, record an error in this case. */
> > - /* Fall through. */
> > - default: /* We expect here only GMON_PROF_ERROR. */
> > - p->state = GMON_PROF_ERROR;
> > - break;
> > - case GMON_PROF_BUSY: break;
> > - }
> > - return;
> > - }
> > - }
> > -#else /* ??? No semaphore primitives available. */
> > - if (p->state != GMON_PROF_ON)
> > - return;
> > - p->state = GMON_PROF_BUSY;
> > -#endif
> > -
> > - frompcindex = count_ptr;
> > - toindex = *frompcindex;
> > - if (toindex == 0) {
> > - /*
> > - * first time traversing this arc
> > - */
> > - toindex = ++p->tos[0].link;
> > - if (toindex >= (ARCINDEX) p->tolimit)
> > - /* halt further profiling */
> > - goto overflow;
> > -
> > - *frompcindex = toindex;
> > - top = &p->tos[toindex];
> > - top->selfpc = selfpc;
> > - top->count = 1;
> > - top->link = 0;
> > - goto done;
> > - }
> > - top = &p->tos[toindex];
> > - if (top->selfpc == selfpc) {
> > - /*
> > - * arc at front of chain; usual case.
> > - */
> > - top->count++;
> > - goto done;
> > - }
> > - /*
> > - * have to go looking down chain for it.
> > - * top points to what we are looking at,
> > - * prevtop points to previous top.
> > - * we know it is not at the head of the chain.
> > - */
> > - for (; /* goto done */; ) {
> > - if (top->link == 0) {
> > - /*
> > - * top is end of the chain and none of the chain
> > - * had top->selfpc == selfpc.
> > - * so we allocate a new tostruct
> > - * and link it to the head of the chain.
> > - */
> > - toindex = ++p->tos[0].link;
> > - if (toindex >= (ARCINDEX) p->tolimit)
> > - goto overflow;
> > -
> > - top = &p->tos[toindex];
> > - top->selfpc = selfpc;
> > - top->count = 1;
> > - top->link = *frompcindex;
> > - *frompcindex = toindex;
> > - goto done;
> > - }
> > - /*
> > - * otherwise, check the next arc on the chain.
> > - */
> > - prevtop = top;
> > - top = &p->tos[top->link];
> > - if (top->selfpc == selfpc) {
> > - /*
> > - * there it is.
> > - * increment its count
> > - * move it to the head of the chain.
> > - */
> > - top->count++;
> > - toindex = prevtop->link;
> > - prevtop->link = top->link;
> > - top->link = *frompcindex;
> > - *frompcindex = toindex;
> > - goto done;
> > - }
> > -
> > - }
> > -done:
> > - p->state = GMON_PROF_ON;
> > - return;
> > -overflow:
> > - p->state = GMON_PROF_ERROR;
> > - return;
> > -}
> > -
> > -/*
> > - * Actual definition of mcount function. Defined in <machine/profile.h>,
> > - * which is included by <sys/gmon.h>.
> > - */
> > -MCOUNT
> > diff --git a/libgcc/config/arc/gmon/prof-freq-stub.S
> b/libgcc/config/arc/gmon/prof-freq-stub.S
> > deleted file mode 100644
> > index 9ffb30b..0000000
> > --- a/libgcc/config/arc/gmon/prof-freq-stub.S
> > +++ /dev/null
> > @@ -1,40 +0,0 @@
> > -/* This file contains code to do profiling.
> > -
> > - Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -#include "../asm.h"
> > -/* This file contains code to do profiling. */
> > - .weak __profile_frequency_value
> > - .global __profile_frequency_value
> > - .set __profile_frequency_value, 1000
> > - .text
> > - .balign 4
> > - .global __profile_frequency
> > - FUNC(__profile_frequency)
> > -__profile_frequency:
> > - mov_s r0,__profile_frequency_value
> > - j_s [blink]
> > - ENDFUNC(__profile_frequency)
> > diff --git a/libgcc/config/arc/gmon/prof-freq.c
> b/libgcc/config/arc/gmon/prof-freq.c
> > deleted file mode 100644
> > index 4437a37..0000000
> > --- a/libgcc/config/arc/gmon/prof-freq.c
> > +++ /dev/null
> > @@ -1,60 +0,0 @@
> > -/* Return frequency of ticks reported by profil. Generic version. */
> > -/*-
> > - * Copyright (c) 1983, 1992, 1993
> > - * The Regents of the University of California. All rights reserved.
> > - *
> > - * Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - *
> > - * Redistribution and use in source and binary forms, with or without
> > - * modification, are permitted provided that the following conditions
> > - * are met:
> > - * 1. Redistributions of source code must retain the above copyright
> > - * notice, this list of conditions and the following disclaimer.
> > - * 2. Redistributions in binary form must reproduce the above copyright
> > - * notice, this list of conditions and the following disclaimer in the
> > - * documentation and/or other materials provided with the distribution.
> > - * 4. Neither the name of the University nor the names of its contributors
> > - * may be used to endorse or promote products derived from this
> software
> > - * without specific prior written permission.
> > - *
> > - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS
> IS'' AND
> > - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> PARTICULAR PURPOSE
> > - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
> BE LIABLE
> > - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> CONSEQUENTIAL
> > - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> SUBSTITUTE GOODS
> > - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> INTERRUPTION)
> > - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT, STRICT
> > - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> IN ANY WAY
> > - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> POSSIBILITY OF
> > - * SUCH DAMAGE.
> > - */
> > -
> > -
> > -#include <sys/types.h>
> > -#include <sys/time.h>
> > -#if 0
> > -#include <libc-internal.h>
> > -#else
> > -#include "sys/gmon.h"
> > -#endif
> > -
> > -int
> > -__profile_frequency (void)
> > -{
> > - /*
> > - * Discover the tick frequency of the machine if something goes wrong,
> > - * we return 0, an impossible hertz.
> > - */
> > - struct itimerval tim;
> > -
> > - tim.it_interval.tv_sec = 0;
> > - tim.it_interval.tv_usec = 1;
> > - tim.it_value.tv_sec = 0;
> > - tim.it_value.tv_usec = 0;
> > - setitimer(ITIMER_REAL, &tim, 0);
> > - setitimer(ITIMER_REAL, 0, &tim);
> > - if (tim.it_interval.tv_usec < 2)
> > - return 0;
> > - return (1000000 / tim.it_interval.tv_usec);
> > -}
> > diff --git a/libgcc/config/arc/gmon/profil.S
> b/libgcc/config/arc/gmon/profil.S
> > deleted file mode 100644
> > index 807e9fe..0000000
> > --- a/libgcc/config/arc/gmon/profil.S
> > +++ /dev/null
> > @@ -1,164 +0,0 @@
> > -/* This file contains code to do profiling.
> > -
> > - Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -#include "../asm.h"
> > -#include "auxreg.h"
> > -/* This file contains code to do profiling. */
> > - .weak __profile_timer_cycles
> > - .global __profile_timer_cycles
> > - .set __profile_timer_cycles, 200
> > -
> > - .section .bss
> > - .global __profil_offset
> > - .align 4
> > - .type __profil_offset, @object
> > - .size __profil_offset, 4
> > -__profil_offset:
> > - .zero 4
> > -
> > - .text
> > - .global __dcache_linesz
> > - .global __profil
> > - FUNC(__profil)
> > -#if !defined (__EM__) && !defined (__HS__)
> > -.Lstop_profiling:
> > - sr r0,[CONTROL0]
> > - j_s [blink]
> > - .balign 4
> > -__profil:
> > -.Lprofil:
> > - breq_s r0,0,.Lstop_profiling
> > - ; r0: buf r1: bufsiz r2: offset r3: scale
> > - bxor.f r3,r3,15; scale must be 0x8000, i.e. 1/2; generate 0.
> > - push_s blink
> > - lsr_s r2,r2,1
> > - mov_s r8,r0
> > - flag.ne 1 ; halt if wrong scale
> > - sub_s r0,r0,r2
> > - st r0,[__profil_offset]
> > - bl __dcache_linesz
> > - pop_s blink
> > - bbit1.d r0,0,nocache
> > - mov_s r0,r8
> > -#ifdef __ARC700__
> > - add_s r1,r1,31
> > - lsr.f lp_count,r1,5
> > - lpne 2f
> > - sr r0,[DC_FLDL]
> > - add_s r0,r0,32
> > -#else /* !__ARC700__ */
> > -# FIX ME: set up loop according to cache line size
> > - lr r12,[D_CACHE_BUILD]
> > - sub_s r0,r0,16
> > - sub_s r1,r1,1
> > - lsr_s r12,r12,16
> > - asr_s r1,r1,4
> > - bmsk_s r12,r12,3
> > - asr_s r1,r1,r12
> > - add.f lp_count,r1,1
> > - mov_s r1,16
> > - asl_s r1,r1,r12
> > - lpne 2f
> > - add r0,r0,r1
> > - sr r0,[DC_FLDL]
> > -#endif /* __ARC700__ */
> > -2: b_s .Lcounters_cleared
> > -nocache:
> > -.Lcounters_cleared:
> > - lr r1,[INT_VECTOR_BASE] ; disable timer0 interrupts
> > - sr r3,[CONTROL0]
> > - sr r3,[COUNT0]
> > -0: ld_s r0,[pcl,1f-0b+((0b-.Lprofil) & 2)] ; 1f@GOTOFF
> > -0: ld_s r12,[pcl,1f+4-0b+((0b-.Lprofil) & 2)] ; 1f@GOTOFF + 4
> > - st_s r0,[r1,24]; timer0 uses vector3
> > - st_s r12,[r1,24+4]; timer0 uses vector3
> > - ;sr 10000,[LIMIT0]
> > - sr __profile_timer_cycles,[LIMIT0]
> > - mov_s r12,3 ; enable timer interrupts; count only when not
> halted.
> > - sr r12,[CONTROL0]
> > - lr r12,[STATUS32]
> > - bset_s r12,r12,1 ; allow level 1 interrupts
> > - flag r12
> > - mov_s r0,0
> > - j_s [blink]
> > - .balign 4
> > -1: j __profil_irq
> > -#else
> > -__profil:
> > - .balign 4
> > - mov_s r0,-1
> > - j_s [blink]
> > -#endif /* !__EM__ && !__HS__ */
> > - ENDFUNC(__profil)
> > -
> > - FUNC(__profil_irq)
> > - .balign 4 ; make final jump unaligned to avoid delay penalty
> > - .balign 32,0,12 ; make sure the code spans no more that two cache
> lines
> > - nop_s
> > -__profil_irq:
> > -#if !defined (__EM__) && !defined (__HS__)
> > - push_s r0
> > - ld r0,[__profil_offset]
> > - push_s r1
> > - lsr r1,ilink1,2
> > - push_s r2
> > - ldw.as.di r2,[r0,r1]
> > - add1 r0,r0,r1
> > - ld_s r1,[sp,4]
> > - add_s r2,r2,1
> > - bbit1 r2,16,nostore
> > - stw.di r2,[r0]
> > -nostore:ld.ab r2,[sp,8]
> > - pop_s r0
> > - j.f [ilink1]
> > -#else
> > - rtie
> > -#endif /* !__EM__ && !__HS__ */
> > - ENDFUNC(__profil_irq)
> > -
> > -; could save one cycle if the counters were allocated at link time and
> > -; the contents of __profil_offset were pre-computed at link time, like this:
> > -#if 0
> > -; __profil_offset needs to be PROVIDEd as __profile_base-text/4
> > - .global __profil_offset
> > - .balign 4
> > -__profil_irq:
> > - push_s r0
> > - lsr r0,ilink1,2
> > - add1 r0,__profil_offset,r0
> > - push_s r1
> > - ldw.di r1,[r0]
> > -
> > -
> > - add_s r1,r1,1
> > - bbit1 r1,16,nostore
> > - stw.di r1,[r0]
> > -nostore:pop_s r1
> > - pop_s r0
> > - j [ilink1]
> > -#endif /* 0 */
> > diff --git a/libgcc/config/arc/gmon/sys/gmon.h
> b/libgcc/config/arc/gmon/sys/gmon.h
> > deleted file mode 100644
> > index f17165a..0000000
> > --- a/libgcc/config/arc/gmon/sys/gmon.h
> > +++ /dev/null
> > @@ -1,217 +0,0 @@
> > -/*-
> > - * Copyright (c) 1982, 1986, 1992, 1993
> > - * The Regents of the University of California. All rights reserved.
> > - * Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - *
> > - * Redistribution and use in source and binary forms, with or without
> > - * modification, are permitted provided that the following conditions
> > - * are met:
> > - * 1. Redistributions of source code must retain the above copyright
> > - * notice, this list of conditions and the following disclaimer.
> > - * 2. Redistributions in binary form must reproduce the above copyright
> > - * notice, this list of conditions and the following disclaimer in the
> > - * documentation and/or other materials provided with the distribution.
> > - * 4. Neither the name of the University nor the names of its contributors
> > - * may be used to endorse or promote products derived from this
> software
> > - * without specific prior written permission.
> > - *
> > - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS
> IS'' AND
> > - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> PARTICULAR PURPOSE
> > - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
> BE LIABLE
> > - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> CONSEQUENTIAL
> > - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> SUBSTITUTE GOODS
> > - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> INTERRUPTION)
> > - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT, STRICT
> > - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> IN ANY WAY
> > - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> POSSIBILITY OF
> > - * SUCH DAMAGE.
> > - *
> > - * @(#)gmon.h 8.2 (Berkeley) 1/4/94
> > - */
> > -
> > -#ifndef _SYS_GMON_H
> > -#define _SYS_GMON_H 1
> > -
> > -#if 0
> > -#include <features.h>
> > -#include <sys/types.h>
> > -#else
> > -#include <sys/types.h>
> > -#include "machine-gmon.h"
> > -#define attribute_hidden __attribute__ ((visibility("hidden")))
> > -#endif
> > -
> > -#include <stdint.h>
> > -
> > -/*
> > - * See gmon_out.h for gmon.out format.
> > - */
> > -
> > -/* structure emitted by "gcc -a". This must match struct bb in
> > - gcc/libgcc2.c. It is OK for gcc to declare a longer structure as
> > - long as the members below are present. */
> > -struct __bb
> > -{
> > - long zero_word;
> > - const char *filename;
> > - long *counts;
> > - long ncounts;
> > - struct __bb *next;
> > - const unsigned long *addresses;
> > -};
> > -
> > -extern struct __bb *__bb_head;
> > -
> > -/*
> > - * histogram counters are unsigned shorts (according to the kernel).
> > - */
> > -#define HISTCOUNTER unsigned short
> > -
> > -/*
> > - * fraction of text space to allocate for histogram counters here, 1/2
> > - */
> > -#define HISTFRACTION 2
> > -
> > -/*
> > - * Fraction of text space to allocate for from hash buckets.
> > - * The value of HASHFRACTION is based on the minimum number of bytes
> > - * of separation between two subroutine call points in the object code.
> > - * Given MIN_SUBR_SEPARATION bytes of separation the value of
> > - * HASHFRACTION is calculated as:
> > - *
> > - * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
> > - *
> > - * For example, on the VAX, the shortest two call sequence is:
> > - *
> > - * calls $0,(r0)
> > - * calls $0,(r0)
> > - *
> > - * which is separated by only three bytes, thus HASHFRACTION is
> > - * calculated as:
> > - *
> > - * HASHFRACTION = 3 / (2 * 2 - 1) = 1
> > - *
> > - * Note that the division above rounds down, thus if
> MIN_SUBR_FRACTION
> > - * is less than three, this algorithm will not work!
> > - *
> > - * In practice, however, call instructions are rarely at a minimal
> > - * distance. Hence, we will define HASHFRACTION to be 2 across all
> > - * architectures. This saves a reasonable amount of space for
> > - * profiling data structures without (in practice) sacrificing
> > - * any granularity.
> > - */
> > -#define HASHFRACTION 2
> > -
> > -/*
> > - * Percent of text space to allocate for tostructs.
> > - * This is a heuristic; we will fail with a warning when profiling programs
> > - * with a very large number of very small functions, but that's
> > - * normally OK.
> > - * 2 is probably still a good value for normal programs.
> > - * Profiling a test case with 64000 small functions will work if
> > - * you raise this value to 3 and link statically (which bloats the
> > - * text size, thus raising the number of arcs expected by the heuristic).
> > - */
> > -#define ARCDENSITY 3
> > -
> > -/*
> > - * Always allocate at least this many tostructs. This
> > - * hides the inadequacy of the ARCDENSITY heuristic, at least
> > - * for small programs.
> > - */
> > -#define MINARCS 50
> > -
> > -/*
> > - * The type used to represent indices into gmonparam.tos[].
> > - */
> > -#define ARCINDEX u_long
> > -
> > -/*
> > - * Maximum number of arcs we want to allow.
> > - * Used to be max representable value of ARCINDEX minus 2, but now
> > - * that ARCINDEX is a long, that's too large; we don't really want
> > - * to allow a 48 gigabyte table.
> > - * The old value of 1<<16 wasn't high enough in practice for large C++
> > - * programs; will 1<<20 be adequate for long? FIXME
> > - */
> > -#define MAXARCS (1 << 20)
> > -
> > -struct tostruct {
> > - u_long selfpc;
> > - long count;
> > - ARCINDEX link;
> > -};
> > -
> > -/*
> > - * a raw arc, with pointers to the calling site and
> > - * the called site and a count.
> > - */
> > -struct rawarc {
> > - u_long raw_frompc;
> > - u_long raw_selfpc;
> > - long raw_count;
> > -};
> > -
> > -/*
> > - * general rounding functions.
> > - */
> > -#define ROUNDDOWN(x,y) (((x)/(y))*(y))
> > -#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
> > -
> > -/*
> > - * The profiling data structures are housed in this structure.
> > - */
> > -struct gmonparam {
> > - long int state;
> > - u_short *kcount;
> > - u_long kcountsize;
> > - ARCINDEX *froms;
> > - u_long fromssize;
> > - struct tostruct *tos;
> > - u_long tossize;
> > - long tolimit;
> > - u_long lowpc;
> > - u_long highpc;
> > - u_long textsize;
> > - u_long hashfraction;
> > - long log_hashfraction;
> > -};
> > -extern struct gmonparam _gmonparam;
> > -
> > -/*
> > - * Possible states of profiling.
> > - */
> > -#define GMON_PROF_ON 0
> > -#define GMON_PROF_BUSY 1
> > -#define GMON_PROF_ERROR 2
> > -#define GMON_PROF_OFF 3
> > -
> > -/*
> > - * Sysctl definitions for extracting profiling information from the kernel.
> > - */
> > -#define GPROF_STATE 0 /* int: profiling enabling variable */
> > -#define GPROF_COUNT 1 /* struct: profile tick count
> buffer */
> > -#define GPROF_FROMS 2 /* struct: from location hash
> bucket */
> > -#define GPROF_TOS 3 /* struct: destination/count structure
> */
> > -#define GPROF_GMONPARAM 4 /* struct: profiling
> parameters (see above) */
> > -
> > -__BEGIN_DECLS
> > -
> > -/* Set up data structures and start profiling. */
> > -extern void __monstartup (u_long __lowpc, u_long __highpc) __THROW;
> > -extern void monstartup (u_long __lowpc, u_long __highpc) __THROW;
> > -
> > -/* Clean up profiling and write out gmon.out. */
> > -extern void _mcleanup (void) __THROW;
> > -
> > -extern void __write_profiling (void);
> > -extern int attribute_hidden __profile_frequency (void);
> > -
> > -extern u_long __arc_profile_desc_secstart[],
> __arc_profile_desc_secend[];
> > -extern u_long __arc_profile_forward_secstart[],
> __arc_profile_forward_secend[];
> > -extern u_long __arc_profile_counters_secstart[];
> > -
> > -__END_DECLS
> > -
> > -#endif /* sys/gmon.h */
> > diff --git a/libgcc/config/arc/gmon/sys/gmon_out.h
> b/libgcc/config/arc/gmon/sys/gmon_out.h
> > deleted file mode 100644
> > index d1f3b05..0000000
> > --- a/libgcc/config/arc/gmon/sys/gmon_out.h
> > +++ /dev/null
> > @@ -1,55 +0,0 @@
> > -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > - Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > - on behalf of Synopsys Inc.
> > -
> > -This file is part of GCC.
> > -
> > -GCC is free software; you can redistribute it and/or modify it under
> > -the terms of the GNU General Public License as published by the Free
> > -Software Foundation; either version 3, or (at your option) any later
> > -version.
> > -
> > -GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -for more details.
> > -
> > -Under Section 7 of GPL version 3, you are granted additional
> > -permissions described in the GCC Runtime Library Exception, version
> > -3.1, as published by the Free Software Foundation.
> > -
> > -You should have received a copy of the GNU General Public License and
> > -a copy of the GCC Runtime Library Exception along with this program;
> > -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -<http://www.gnu.org/licenses/>. */
> > -
> > -#define GMON_TAG_TIME_HIST 0
> > -#define GMON_TAG_CG_ARC 1
> > -#define GMON_TAG_BB_COUNT 2
> > -
> > -#define GMON_MAGIC "gmon"
> > -#define GMON_VERSION 1
> > -
> > -struct arc_gmon_hist_hdr
> > -{
> > - char low_pc[4];
> > - char high_pc[4];
> > - char hist_size[4];
> > - char prof_rate[4];
> > - char dimen[15];
> > - char dimen_abbrev;
> > -};
> > -
> > -struct gmon_cg_arc_record
> > -{
> > - char afrompc[4];
> > - char selfpc[4];
> > - char count[4];
> > -};
> > -
> > -struct gmon_hdr
> > -{
> > - char cookie[4];
> > - char version[4];
> > - char c[12];
> > -};
> > diff --git a/libgcc/config/arc/t-arc b/libgcc/config/arc/t-arc
> > index 3523aed..51a9273 100644
> > --- a/libgcc/config/arc/t-arc
> > +++ b/libgcc/config/arc/t-arc
> > @@ -62,42 +62,5 @@ fp-bit.c: $(srcdir)/fp-bit.c
> >
> > # .init/.fini section routines
> >
> > -crtg.o: $(srcdir)/config/arc/crtg.S
> > - $(crt_compile) -c -x assembler-with-cpp $<
> > -
> > -crtgend.o: $(srcdir)/config/arc/crtgend.S
> > - $(crt_compile) -c -x assembler-with-cpp $<
> > -
> > crttls.o: $(srcdir)/config/arc/crttls.S
> > $(crt_compile) -c -x assembler-with-cpp $<
> > -
> > -mcount.o: $(srcdir)/config/arc/gmon/mcount.c
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -c $< \
> > - -fcall-saved-r0 -fcall-saved-r1 -fcall-saved-r2 -fcall-saved-r3 \
> > - -fcall-saved-r4 -fcall-saved-r5 -fcall-saved-r6 -fcall-saved-r7 \
> > - -fomit-frame-pointer
> > -
> > -gmon.o: $(srcdir)/config/arc/gmon/gmon.c
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -mno-sdata -c $<
> \
> > - -fno-strict-aliasing \
> > - -Wno-extra # suppress inane warning about missing initializer.
> > - # Adding initializers for the remaining elements of gmonparam would
> > - # make the code more brittle.
> > -
> > -prof-freq-stub.o: $(srcdir)/config/arc/gmon/prof-freq-stub.S
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -c $<
> > -
> > -prof-freq.o: $(srcdir)/config/arc/gmon/prof-freq.c
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -c $<
> > -
> > -dcache_linesz.o: $(srcdir)/config/arc/gmon/dcache_linesz.S
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -c $<
> > -
> > -profil.o: $(srcdir)/config/arc/gmon/profil.S
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -c $<
> > -
> > -profil-uclibc.o: $(srcdir)/config/arc/gmon/profil-uclibc.c
> > - $(gcc_compile) -isystem $(srcdir)/config/arc/gmon -c $<
> > -
> > -libgmon.a: mcount.o gmon.o dcache_linesz.o $(PROFILE_OSDEP)
> > - $(AR_CREATE_FOR_TARGET) $@ $^
> > diff --git a/libgcc/config/arc/t-arc-newlib b/libgcc/config/arc/t-arc-newlib
> > deleted file mode 100644
> > index f56b052..0000000
> > --- a/libgcc/config/arc/t-arc-newlib
> > +++ /dev/null
> > @@ -1,22 +0,0 @@
> > -# GCC Makefile fragment for the Synopsys DesignWare ARC CPU with
> newlib.
> > -
> > -# Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > -# Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > -# on behalf of Synopsys Inc.
> > -
> > -# This file is part of GCC.
> > -
> > -# GCC is free software; you can redistribute it and/or modify it under the
> > -# terms of the GNU General Public License as published by the Free
> Software
> > -# Foundation; either version 3, or (at your option) any later version.
> > -
> > -# GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -# WARRANTY; without even the implied warranty of MERCHANTABILITY or
> FITNESS
> > -# FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> more
> > -# details.
> > -
> > -# You should have received a copy of the GNU General Public License
> along
> > -# with GCC; see the file COPYING3. If not see
> > -# <http://www.gnu.org/licenses/>.
> > -
> > -PROFILE_OSDEP = prof-freq-stub.o profil.o
> > diff --git a/libgcc/config/arc/t-arc-uClibc b/libgcc/config/arc/t-arc-uClibc
> > new file mode 100644
> > index 0000000..81156e8
> > --- /dev/null
> > +++ b/libgcc/config/arc/t-arc-uClibc
> > @@ -0,0 +1,38 @@
> > +# GCC Makefile fragment for the Synopsys DesignWare ARC700 CPU with
> uClibc.
> > +
> > +# Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > +# Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > +# on behalf of Synopsys Inc.
> > +
> > +# This file is part of GCC.
> > +
> > +# GCC is free software; you can redistribute it and/or modify it under
> > +# the terms of the GNU General Public License as published by the Free
> > +# Software Foundation; either version 3, or (at your option) any later
> > +# version.
> > +
> > +# GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > +# WARRANTY; without even the implied warranty of MERCHANTABILITY
> or
> > +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > +# for more details.
> > +
> > +# Under Section 7 of GPL version 3, you are granted additional
> > +# permissions described in the GCC Runtime Library Exception, version
> > +# 3.1, as published by the Free Software Foundation.
> > +
> > +# You should have received a copy of the GNU General Public License and
> > +# a copy of the GCC Runtime Library Exception along with this program;
> > +# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > +# <http://www.gnu.org/licenses/>. */
> > +
> > +CRTSTUFF_T_CFLAGS += -mno-sdata
> > +
> > +# Compile crtbeginS.o and crtendS.o with pic.
> > +CRTSTUFF_T_CFLAGS_S = $(CRTSTUFF_T_CFLAGS) -fPIC
> > +
> > +# Compile libgcc2.a with pic.
> > +TARGET_LIBGCC2_CFLAGS = -fPIC
> > +
> > +# Override t-slibgcc-elf-ver to hide some lib1func
> > +# routines which should not be called via PLT.
> > +SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/arc/libgcc-excl.ver
> > diff --git a/libgcc/config/arc/t-arc700-uClibc b/libgcc/config/arc/t-arc700-
> uClibc
> > deleted file mode 100644
> > index f5067cc..0000000
> > --- a/libgcc/config/arc/t-arc700-uClibc
> > +++ /dev/null
> > @@ -1,40 +0,0 @@
> > -# GCC Makefile fragment for the Synopsys DesignWare ARC700 CPU with
> uClibc.
> > -
> > -# Copyright (C) 2007-2016 Free Software Foundation, Inc.
> > -# Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
> > -# on behalf of Synopsys Inc.
> > -
> > -# This file is part of GCC.
> > -
> > -# GCC is free software; you can redistribute it and/or modify it under
> > -# the terms of the GNU General Public License as published by the Free
> > -# Software Foundation; either version 3, or (at your option) any later
> > -# version.
> > -
> > -# GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> > -# WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > -# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> License
> > -# for more details.
> > -
> > -# Under Section 7 of GPL version 3, you are granted additional
> > -# permissions described in the GCC Runtime Library Exception, version
> > -# 3.1, as published by the Free Software Foundation.
> > -
> > -# You should have received a copy of the GNU General Public License and
> > -# a copy of the GCC Runtime Library Exception along with this program;
> > -# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > -# <http://www.gnu.org/licenses/>. */
> > -
> > -CRTSTUFF_T_CFLAGS += -mno-sdata
> > -
> > -# Compile crtbeginS.o and crtendS.o with pic.
> > -CRTSTUFF_T_CFLAGS_S = $(CRTSTUFF_T_CFLAGS) -fPIC
> > -
> > -# Compile libgcc2.a with pic.
> > -TARGET_LIBGCC2_CFLAGS = -fPIC
> > -
> > -PROFILE_OSDEP = prof-freq.o
> > -
> > -# Override t-slibgcc-elf-ver to hide some lib1func
> > -# routines which should not be called via PLT.
> > -SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/arc/libgcc-excl.ver
> > --
> > 1.9.1
> >