David S. Miller [Thu, 15 Nov 2012 21:24:22 +0000 (21:24 +0000)]
Add support for sparc fused compare-and-branch.
gcc/
2012-11-15 David S. Miller <davem@davemloft.net>
* configure.ac: Add check for assembler SPARC4 instruction
support.
* configure: Rebuild.
* config.in: Add HAVE_AS_SPARC4 section.
* config/sparc/sparc.opt (mcbcond): New option.
* doc/invoke.texi: Document it.
* config/sparc/constraints.md: New constraint 'A' for 5-bit signed
immediates.
* doc/md.texi: Document it.
* config/sparc/sparc.c (dump_target_flag_bits): Handle MASK_CBCOND.
(sparc_option_override): Likewise.
(emit_cbcond_insn): New function.
(emit_conditional_branch_insn): Call it.
(emit_cbcond_nop): New function.
(output_ubranch): Use cbcond, remove label arg.
(output_cbcond): New function.
* config/sparc/sparc-protos.h (output_ubranch): Update.
(output_cbcond): Declare it.
(emit_cbcond_nop): Likewise.
* config/sparc/sparc.md (type attribute): New types 'cbcond'
and uncond_cbcond.
(emit_cbcond_nop): New attribute.
(length attribute): Handle cbcond and uncond_cbcond.
(in_call_delay attribute): Reject cbcond and uncond_cbcond.
(in_branch_delay attribute): Likewise.
(in_uncond_branch_delay attribute): Likewise.
(in_annul_branch_delay attribute): Likewise.
(*cbcond_sp32, *cbcond_sp64): New insn patterns.
(jump): Rewrite into an expander.
(*jump_ubranch, *jump_cbcond): New patterns.
* config/sparc/niagara4.md: Match 'cbcond' in 'n4_cti'.
* config/sparc/sparc.h (AS_NIAGARA4_FLAG): New macro, use it
when target default is niagara4.
(SPARC_SIMM5_P): Define.
* config/sparc/sol2.h (AS_SPARC64_FLAG): Adjust.
(AS_SPARC32_FLAG): Define.
(ASM_CPU32_DEFAULT_SPEC, ASM_CPU64_DEFAULT_SPEC): Use
AS_NIAGARA4_FLAG as needed.
Tobias Burnus [Thu, 15 Nov 2012 17:22:21 +0000 (18:22 +0100)]
fmaq.c (fmaq): Merge from GLIBC.
2012-11-15 Tobias Burnus <burnus@net-b.de>
Joseph Myers <joseph@codesourcery.com>
* math/fmaq.c (fmaq): Merge from GLIBC. Fix fma
underflows with small x * y; Fix overflow results
outside round-to-nearest mode; make use of Dekker
and Knuth algorithms use round-to-nearest.
Co-Authored-By: Joseph Myers <joseph@codesourcery.com>
From-SVN: r193538
Tom de Vries [Thu, 15 Nov 2012 16:49:45 +0000 (16:49 +0000)]
re PR tree-optimization/54619 (GCC aborts during compilation with '-O2 -mips16')
2012-11-15 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/54619
* tree-ssa-loop-ivopts.c (get_use_type): New function.
(get_computation_at): Use get_use_type.
(get_computation_cost_at): Declare and set mem_mode. Use mem_mode.
Dmitry Vyukov [Thu, 15 Nov 2012 16:28:39 +0000 (08:28 -0800)]
MAINTAINERS: (libsanitizer...
* MAINTAINERS: (libsanitizer, asan.c): Add myself,
Kostya Serebryany (kcc@google.com) and
Jakub Jelinek (jakub@redhat.com).
Rename area for Dodji Seketeli (dodji@redhat.com).
Jakub Jelinek [Thu, 15 Nov 2012 13:12:36 +0000 (14:12 +0100)]
asan.c (report_error_func): Set DECL_IGNORED_P, don't touch DECL_ASSEMBLER_NAME.
* asan.c (report_error_func): Set DECL_IGNORED_P, don't touch
DECL_ASSEMBLER_NAME.
(asan_init_func): Likewise.
(asan_finish_file): Use void * instead of __asan_global * as
type of __asan_{,un}register_globals. Set DECL_IGNORED_P on
the decls.
Jakub Jelinek [Wed, 14 Nov 2012 22:58:01 +0000 (23:58 +0100)]
asan-dg.exp: New file.
* lib/asan-dg.exp: New file.
* gcc.dg/asan/asan.exp: New file.
* g++.dg/dg.exp: Prune also asan tests.
* g++.dg/asan/asan.exp: New file.
* c-c++-common/asan/memcmp-1.c: New test.
Fabien Chêne [Wed, 14 Nov 2012 20:12:47 +0000 (21:12 +0100)]
re PR c++/11750 (class scope using-declaration lookup not implemented)
gcc/testsuite/ChangeLog
2012-11-14 Fabien Chêne <fabien@gcc.gnu.org>
PR c++/11750
* g++.dg/inherit/vitual9.C: New.
gcc/cp/ChangeLog
2012-11-14 Fabien Chêne <fabien@gcc.gnu.org>
PR c++/11750
* call.c (build_new_method_call_1): Check that the instance type
and the function context are the same before setting the flag
LOOKUP_NONVIRTUAL.
David Edelsohn [Wed, 14 Nov 2012 16:41:21 +0000 (11:41 -0500)]
configure.ac (HAVE_LD_LARGE_TOC): Add AIX test.
* configure.ac (HAVE_LD_LARGE_TOC): Add AIX test.
* configure: Regenerated.
* config/rs6000/aix61.h (SUBTARGET_OVERRIDE_OPTIONS): Warn if
other toc options used with cmodel. Disable TARGET_NO_FP_IN_TOC
and TARGET_NO_SUM_IN_TOC if not CMODEL_SMALL. CMODEL_MEDIUM means
CMODEL_LARGE on AIX.
(ASM_SPEC): -mvsx implies -mpwr6. Add -many.
(ASM_DEFAULT_SPEC): Use -mpwr4.
(TARGET_CMODEL): Define.
(SET_CMODEL): Define.
* config/rs6000/rs6000.md (largetoc_high_aix<mode>): New.
(largetoc_high_plus_aix<mode>): New.
(largetoc_low<mode>): Change to mode iterator. Test TARGET_TOC
instead of TARGET_ELF.
(tocref): Remove TARGET_ELF test.
* config/rs6000/rs6000.c (output_toc): Use [TE] for large TOC
symbols on AIX.
* config/rs6000/aix64.opt (mcmodel): New.
Andreas Tobler [Wed, 14 Nov 2012 15:55:50 +0000 (16:55 +0100)]
i386.c (ix86_get_function_versions_dispatcher): Guard variables with ASM_OUTPUT_TYPE_DIRECTIVE and HAVE_GNU_INDIRECT_FUNCTION...
2012-11-14 Andreas Tobler <andreast@fgznet.ch>
* config/i386/i386.c (ix86_get_function_versions_dispatcher): Guard
variables with ASM_OUTPUT_TYPE_DIRECTIVE and
HAVE_GNU_INDIRECT_FUNCTION where needed.
Sriraman Tallam [Tue, 13 Nov 2012 21:56:30 +0000 (21:56 +0000)]
cgraph.c (insert_new_cgraph_node_version): Use cgraph_get_node instead of cgraph_get_create_node.
2012-11-13 Sriraman Tallam <tmsriram@google.com>
* cgraph.c (insert_new_cgraph_node_version): Use cgraph_get_node
instead of cgraph_get_create_node.
* config/i386/i386.c (ix86_get_function_versions_dispatcher): Move ifunc
not supported code to the end.
H.J. Lu [Tue, 13 Nov 2012 18:35:32 +0000 (10:35 -0800)]
Workaround PR middle-end/55142
gcc/
2012-11-13 Eric Botcazou <ebotcazou@adacore.com>
H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/55142
* config/i386/i386.c (legitimize_pic_address): Properly handle
REG + CONST.
(ix86_print_operand_address): Set code to 'k' when forcing
addr32 prefix. For x32, zero-extend negative displacement if
it < -16*1024*1024.
gcc/testsuite/
2012-11-13 H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/55142
* gcc.target/i386/pr55142-1.c: New file.
* gcc.target/i386/pr55142-2.c: Likewise.
Uros Bizjak [Tue, 13 Nov 2012 16:59:37 +0000 (17:59 +0100)]
re PR target/41993 ([sh] ICE in create_pre_exit, at mode-switching.c:399)
PR target/41993
* mode-switching.c (create_pre_exit): Set return_copy to last_insn
when copy_start is a function return regno instead of pseudo.
Skip debug instructions in instruction scan loop.
Dodji Seketeli [Tue, 13 Nov 2012 16:07:39 +0000 (16:07 +0000)]
PR c++/54466 - ICE with alias template which type-id is const qualified
Consider this short example:
template<typename T>
struct X { };
template<typename T>
using Y = const X<T>;
using Z = Y<int>;
G++ crashes in lookup_class_template_1 while trying to build the alias
template instantiation Y<int>.
I think this is indirectly due to the fact that that
lookup_class_template_1 can now yield a const qualified type like
'const X<T>'.
As a consequence, the code in lookup_template_class_1 that was trying
to access the TYPE_STUB_DECL field of the result of
lookup_template_class_1 should now be adjusted to access the
TYPE_STUB_DECL of the main variant of the resulting type instead (and
that is TYPE_MAIN_DECL); because qualified types (constructed with
build_qualified_type) have their TYPE_STUB_DECL set to NULL.
Fixed thus and tested on x86_64-unknown-linux-gnu against trunk.
gcc/cp
PR c++/54466
* pt.c (lookup_template_class_1): TYPE_STUB_DECL should be
accessed on the main variant of the type.
gcc/testsuite/
* g++.dg/cpp0x/alias-decl-26.C: New test file.
In the example of this patch, g++ crashes when trying to build the
alias template Y<int
Jakub Jelinek [Tue, 13 Nov 2012 07:25:36 +0000 (08:25 +0100)]
re PR tree-optimization/55281 (ICE in build_int_cst_wide, at tree.c:1217 (with Ofast, ok with O3))
PR tree-optimization/55281
* tree-vect-generic.c (expand_vector_condition): Accept any
is_gimple_val rather than just SSA_NAME if not COMPARISON_CLASS_P.
* fold-const.c (fold_ternary_loc): Fold VEC_COND_EXPR if arg0 is
either integer_all_onesp or integer_zerop.
* tree-vect-stmts.c (vectorizable_condition): Build the condition
using corresponding vector integer type instead of vectype.
* gcc.dg/vect/fast-math-pr55281.c: New test.
* g++.dg/opt/pr55281.C: New test.
Jakub Jelinek [Tue, 13 Nov 2012 07:23:51 +0000 (08:23 +0100)]
re PR rtl-optimization/54127 (ICE in maybe_record_trace_start with asm goto, --target=powerpc-unknown-linux-gnu)
PR rtl-optimization/54127
* cfgrtl.c (force_nonfallthru_and_redirect): When redirecting
asm goto labels from BB_HEAD (e->dest) to target bb, decrement
LABEL_NUSES of BB_HEAD (e->dest) and increment LABEL_NUSES of
BB_HEAD (target) appropriately and adjust JUMP_LABEL and/or
REG_LABEL_TARGET and REG_LABEL_OPERAND.
re PR target/55195 (shorten_branches generates incorrect forward branch distances)
PR target/55195
* config/pa/pa.md (type): Add sibcall and sh_func_adrs insn types.
(in_branch_delay): Don't allow sibcall or sh_func_adrs insns.
(in_nullified_branch_delay): Likewise.
(in_call_delay): Likewise.
Define delay for sibcall insns. Adjust Z3 and Z4 insn reservations for
new types. Add opaque cond to mark all calls, sibcalls, dyncalls and
the $$sh_func_adrs call as variable. Update type of sibcalls and
$$sh_func_adrs call.
* config/pa/pa.c (pa_adjust_insn_length): Revise to return updated
length instead of adjustment. Handle negative and undefined call
adjustments for insn_default_length. Remove adjustment for millicode
insn with unfilled delay slot.
(pa_output_millicode_call): Update for revised millicode length.
* config/pa/pa.h (ADJUST_INSN_LENGTH): Revise to set LENGTH.
Ian Lance Taylor [Mon, 12 Nov 2012 21:24:19 +0000 (21:24 +0000)]
configure.ac: Check for getexecname.
* configure.ac: Check for getexecname.
* fileline.c: #include <errno.h>. Define getexecname if not
available.
(fileline_initialize): Try to find the executable in a few
different ways.
* print.c (error_callback): Only print the filename if it came
from the backtrace state.
* configure, config.h.in: Rebuild.
Steven Bosscher [Mon, 12 Nov 2012 20:21:59 +0000 (20:21 +0000)]
re PR rtl-optimization/51447 (global register variable definition incorrectly removed as dead code)
gcc/
PR rtl-optimization/51447
* df-scan.c (df_get_entry_block_def_set): Add global regs to the set.
* df-problems.c (df_lr_local_compute): Make global regs always live.
* dce.c (deletable_insn_p): Make insns setting a global reg
inherently necessary.
testsuite/
PR rtl-optimization/51447
* gcc.c-torture/execute/pr51447.c: New test.
Wei Mi [Mon, 12 Nov 2012 15:53:47 +0000 (15:53 +0000)]
Import the asan runtime library into GCC tree
This patch imports the runtime library in the GCC tree, ensures that
-lasan is passed to the linker when -faddress-sanitizer is used and
sets up the build system accordingly.
ChangeLog:
* configure.ac: Add libsanitizer to target_libraries.
* Makefile.def: Ditto.
* configure: Regenerate.
* Makefile.in: Regenerate.
* libsanitizer: New directory for asan runtime. Contains an empty
tsan directory.
gcc/ChangeLog:
* gcc.c (LINK_COMMAND_SPEC): Add -laddress-sanitizer to link
command if -faddress-sanitizer is on.
Dodji Seketeli [Mon, 12 Nov 2012 15:53:25 +0000 (15:53 +0000)]
Instrument built-in memory access function calls
This patch instruments many memory access patterns through builtins.
Basically, for a call like:
__builtin_memset (from, 0, n_bytes);
the patch would only instrument the accesses at the beginning and at
the end of the memory region [from, from + n_bytes]. This is the
strategy used by the llvm implementation of asan.
This instrumentation is done for all the memory access builtin
functions that expose a well specified memory region -- one that
explicitly states the number of bytes accessed in the region.
A special treatment is used for __builtin_strlen. The patch
instruments the access to the first byte of its argument, as well as
the access to the byte (of the argument) at the offset returned by
strlen.
For the __sync_* and __atomic* calls the patch instruments the access
to the bytes pointed to by the argument.
While doing this, I have added a new parameter to build_check_stmt to
decide whether to insert the instrumentation code before or after the
statement iterator. This allows us to do away with the
gsi_{next,prev} dance we were doing in the callers of this function.
Tested by running cc1 -fasan on variations of simple programs like:
int
foo ()
{
char foo[10] = {0};
foo[0] = 't';
foo[1] = 'e';
foo[2] = 's';
foo[3] = 't';
int l = __builtin_strlen (foo);
int n = sizeof (foo);
__builtin_memset (&foo[4], 0, n - 4);
__sync_fetch_and_add (&foo[11], 1);
return l;
}
and by starring at the gimple output which for this function is:
;; Function foo (foo, funcdef_no=0, decl_uid=1714, cgraph_uid=0)
foo ()
{
int n;
int l;
char foo[10];
int D.1725;
char * D.1724;
int D.1723;
long unsigned int D.1722;
int D.1721;
long unsigned int D.1720;
long unsigned int _1;
int _4;
long unsigned int _5;
int _6;
char * _7;
int _8;
char * _9;
unsigned long _10;
unsigned long _11;
unsigned long _12;
signed char * _13;
signed char _14;
_Bool _15;
unsigned long _16;
signed char _17;
_Bool _18;
_Bool _19;
char * _20;
unsigned long _21;
unsigned long _22;
unsigned long _23;
signed char * _24;
signed char _25;
_Bool _26;
unsigned long _27;
signed char _28;
_Bool _29;
_Bool _30;
char * _31;
unsigned long _32;
unsigned long _33;
unsigned long _34;
signed char * _35;
signed char _36;
_Bool _37;
unsigned long _38;
signed char _39;
_Bool _40;
_Bool _41;
char * _42;
unsigned long _43;
unsigned long _44;
unsigned long _45;
signed char * _46;
signed char _47;
_Bool _48;
unsigned long _49;
signed char _50;
_Bool _51;
_Bool _52;
char * _53;
unsigned long _54;
unsigned long _55;
unsigned long _56;
signed char * _57;
signed char _58;
_Bool _59;
unsigned long _60;
signed char _61;
_Bool _62;
_Bool _63;
char[10] * _64;
unsigned long _65;
unsigned long _66;
unsigned long _67;
signed char * _68;
signed char _69;
_Bool _70;
unsigned long _71;
signed char _72;
_Bool _73;
_Bool _74;
unsigned long _75;
unsigned long _76;
unsigned long _77;
signed char * _78;
signed char _79;
_Bool _80;
unsigned long _81;
signed char _82;
_Bool _83;
_Bool _84;
long unsigned int _85;
long unsigned int _86;
char * _87;
char * _88;
unsigned long _89;
unsigned long _90;
unsigned long _91;
signed char * _92;
signed char _93;
_Bool _94;
unsigned long _95;
signed char _96;
_Bool _97;
_Bool _98;
char * _99;
unsigned long _100;
unsigned long _101;
unsigned long _102;
signed char * _103;
signed char _104;
_Bool _105;
unsigned long _106;
signed char _107;
_Bool _108;
_Bool _109;
gcc/
* gimple.h (is_gimple_builtin_call): Declare ...
* gimple.c (is_gimple_builtin_call): ... New public function.
* asan.c (insert_if_then_before_iter, instrument_mem_region_access,
instrument_strlen_call, maybe_instrument_builtin_call,
instrument_call): New static functions.
(create_cond_insert_point): Renamed
create_cond_insert_point_before_iter into this. Add a new
parameter to decide whether to insert the condition before or
after the statement iterator.
(build_check_stmt): Adjust for the new create_cond_insert_point.
Add a new parameter to decide whether to add the instrumentation
code before or after the statement iterator.
(instrument_assignment): Factorize from ...
(transform_statements): ... here. Use maybe_instrument_call to
instrument builtin function calls as well.
(instrument_derefs): Adjust for the new parameter of
build_check_stmt. Fix detection of bit-field access.
Jakub Jelinek [Mon, 12 Nov 2012 15:52:42 +0000 (16:52 +0100)]
Implement protection of global variables
This patch implements the protection of global variables. See the
comments appended to the beginning of the asan.c file.
* varasm.c: Include asan.h.
(assemble_noswitch_variable): Grow size by asan_red_zone_size
if decl is asan protected.
(place_block_symbol): Likewise.
(assemble_variable): If decl is asan protected, increase
DECL_ALIGN if needed, and for decls emitted using
assemble_variable_contents append padding zeros after it.
* Makefile.in (varasm.o): Depend on asan.h.
* asan.c: Include output.h.
(asan_pp, asan_pp_initialized, asan_ctor_statements): New variables.
(asan_pp_initialize, asan_pp_string): New functions.
(asan_emit_stack_protection): Use asan_pp{,_initialized}
instead of local pp{,_initialized} vars, use asan_pp_initialize
and asan_pp_string helpers.
(asan_needs_local_alias, asan_protect_global,
asan_global_struct, asan_add_global): New functions.
(asan_finish_file): Protect global vars that can be protected. Use
asan_ctor_statements instead of ctor_statements
* asan.h (asan_protect_global): New prototype.
(asan_red_zone_size): New inline function.
Co-Authored-By: Wei Mi <wmi@google.com>
From-SVN: r193437
Jakub Jelinek [Mon, 12 Nov 2012 15:52:26 +0000 (16:52 +0100)]
Implement protection of stack variables
This patch implements the protection of stack variables.
It lays out stack variables as well as the different red zones,
emits some prologue code to populate the shadow memory as to poison
(mark as non-accessible) the regions of the red zones and mark the
regions of stack variables as accessible, and emit some epilogue code
to un-poison (mark as accessible) the regions of red zones right
before the function exits.
* Makefile.in (asan.o): Depend on $(EXPR_H) $(OPTABS_H).
(cfgexpand.o): Depend on asan.h.
* asan.c: Include expr.h and optabs.h.
(asan_shadow_set): New variable.
(asan_shadow_cst, asan_emit_stack_protection): New functions.
(asan_init_shadow_ptr_types): Initialize also asan_shadow_set.
* cfgexpand.c: Include asan.h. Define HOST_WIDE_INT heap vector.
(partition_stack_vars): If i is large alignment and j small
alignment or vice versa, break out of the loop instead of continue,
and put the test earlier. If flag_asan, break out of the loop
if for small alignment size is different.
(struct stack_vars_data): New type.
(expand_stack_vars): Add DATA argument. Change PRED type to
function taking size_t argument instead of tree. Adjust pred
calls. Fill DATA in and add needed padding in between variables
if -faddress-sanitizer.
(defer_stack_allocation): Defer everything for flag_asan.
(stack_protect_decl_phase_1, stack_protect_decl_phase_2): Take
size_t index into stack_vars array instead of the decl directly.
(asan_decl_phase_3): New function.
(expand_used_vars): Return var destruction sequence. Adjust
expand_stack_vars calls, add another one for flag_asan. Call
asan_emit_stack_protection if expand_stack_vars added anything
to the vectors.
(expand_gimple_basic_block): Add disable_tail_calls argument.
(gimple_expand_cfg): Pass true to it if expand_used_vars returned
non-NULL. Emit the sequence returned by expand_used_vars after
return_label.
* asan.h (asan_emit_stack_protection): New prototype.
(asan_shadow_set): New decl.
(ASAN_RED_ZONE_SIZE, ASAN_STACK_MAGIC_LEFT, ASAN_STACK_MAGIC_MIDDLE,
ASAN_STACK_MAGIC_RIGHT, ASAN_STACK_FRAME_MAGIC): Define.
(asan_protect_stack_decl): New inline.
* toplev.c (process_options): Also disable -faddress-sanitizer on
!FRAME_GROWS_DOWNWARDS targets.
Jakub Jelinek [Mon, 12 Nov 2012 15:52:09 +0000 (16:52 +0100)]
Allow asan at -O0
This patch defines a new asan pass gate that is activated at -O0, in
addition to the pass that was initially activated at -O3 level The
patch also does some comment cleanups here and there.
* asan.c (build_check_stmt): Rename join_bb variable to else_bb.
(gate_asan_O0): New function.
(pass_asan_O0): New variable.
* passes.c (init_optimization_passes): Add pass_asan_O0.
* tree-pass.h (pass_asan_O0): New declaration.
Jakub Jelinek [Mon, 12 Nov 2012 15:51:53 +0000 (16:51 +0100)]
Emit GIMPLE directly instead of gimplifying GENERIC.
This patch cleanups the instrumentation code generation by emitting
GIMPLE directly, as opposed to emitting GENERIC tree and then
gimplifying them. It also does some cleanups here and there
* Makefile.in (GTFILES): Add $(srcdir)/asan.c.
(asan.o): Update the dependencies of asan.o.
* asan.c (tm.h, tree.h, tm_p.h, basic-block.h, flags.h
function.h, tree-inline.h, tree-dump.h, diagnostic.h, demangle.h,
langhooks.h, ggc.h, cgraph.h, gimple.h): Remove these unused but
included headers.
(shadow_ptr_types): New variable.
(report_error_func): Change is_store argument to bool, don't append
newline to function name.
(PROB_VERY_UNLIKELY, PROB_ALWAYS): Define.
(build_check_stmt): Change is_store argument to bool. Emit GIMPLE
directly instead of creating trees and gimplifying them. Mark
the error reporting function as very unlikely.
(instrument_derefs): Change is_store argument to bool. Use
int_size_in_bytes to compute size_in_bytes, simplify size check.
Use build_fold_addr_expr instead of build_addr.
(transform_statements): Adjust instrument_derefs caller.
Use gimple_assign_single_p as stmt test. Don't look at MEM refs
in rhs2.
(asan_init_shadow_ptr_types): New function.
(asan_instrument): Don't push/pop gimplify context.
Call asan_init_shadow_ptr_types if not yet initialized.
* asan.h (ASAN_SHADOW_SHIFT): Adjust comment.
Co-Authored-By: Dodji Seketeli <dodji@redhat.com> Co-Authored-By: Xinliang David Li <davidxl@google.com>
From-SVN: r193434
Jakub Jelinek [Mon, 12 Nov 2012 15:51:34 +0000 (16:51 +0100)]
Initial asan cleanups
This patch defines a new asan_shadow_offset target macro, instead of
having a mere macro in the asan.c file. It becomes thus cleaner to
define the target macro for targets that supports asan, namely x86 for
now. The ASAN_SHADOW_SHIFT (which, along with the asan_shadow_offset
constant, is used to compute the address of the shadow memory byte for
a given memory address) is defined in asan.h.
gcc/ChangeLog
* toplev.c (process_options): Warn and turn off
-faddress-sanitizer if not supported by target.
* asan.c: Include target.h.
(asan_scale, asan_offset_log_32, asan_offset_log_64,
asan_offset_log): Removed.
(build_check_stmt): Use ASAN_SHADOW_SHIFT and
targetm.asan_shadow_offset ().
(asan_instrument): Don't initialize asan_offset_log.
* asan.h (ASAN_SHADOW_SHIFT): Define.
* target.def (TARGET_ASAN_SHADOW_OFFSET): New hook.
* doc/tm.texi.in (TARGET_ASAN_SHADOW_OFFSET): Add it.
* doc/tm.texi: Regenerated.
* Makefile.in (asan.o): Depend on $(TARGET_H).
* config/i386/i386.c (ix86_asan_shadow_offset): New function.
(TARGET_ASAN_SHADOW_OFFSET): Define.
Wei Mi [Mon, 12 Nov 2012 15:51:13 +0000 (15:51 +0000)]
Initial import of asan from the Google branch
This patch imports the initial state of asan as it was in the
Google branch.
It provides basic infrastructure for asan to instrument memory
accesses on the heap, at -O3. Note that it supports neither stack nor
global variable protection.
The rest of the patches of the set is intended to further improve this
base.
gcc/ChangeLog
* Makefile.in: Add asan.c and its dependencies.
* common.opt: Add -faddress-sanitizer option.
* invoke.texi: Document the new flag.
* passes.c: Add the asan pass.
* toplev.c (compile_file): Call asan_finish_file.
* asan.c: New file.
* asan.h: New file.
* tree-pass.h: Declare pass_asan.
Co-Authored-By: Diego Novillo <dnovillo@google.com> Co-Authored-By: Dodji Seketeli <dodji@redhat.com>
From-SVN: r193432
Bin Cheng [Mon, 12 Nov 2012 02:17:38 +0000 (02:17 +0000)]
gcse.c (struct bb_data): Add new fields, old_pressure, live_in and backup.
* gcse.c (struct bb_data): Add new fields, old_pressure, live_in
and backup.
(get_regno_pressure_class): Add prototype.
(update_bb_reg_pressure): New.
(should_hoist_expr_to_dom): Add new parameter from.
Monitor the change of reg pressure and use it to drive hoisting.
(hoist_code): Update LIVE and reg pressure information.
(calculate_bb_reg_pressure): Initialize live_in and backup.
git://gcc.gnu.org / gcc.git / log