A recent patch increased GCC's memory consumption!

[gcctest at suse dot de]

Hi,

I am a friendly script caring about memory consumption in GCC.  Please
contact jh@suse.cz if something is going wrong.

Comparing memory consumption on compilation of combine.i, insn-attrtab.i,
and generate-3.4.ii I got:


comparing combine.c compilation at -O0 level:
    Overall memory needed: 24900k -> 24904k
    Peak memory use before GGC: 9717k
    Peak memory use after GGC: 9064k
    Maximum of released memory in single GGC run: 2815k
    Garbage: 42310k -> 42300k
    Leak: 6721k -> 6721k
    Overhead: 5842k -> 5842k
    GGC runs: 334 -> 335

comparing combine.c compilation at -O1 level:
    Overall memory needed: 24376k
    Peak memory use before GGC: 17735k
    Peak memory use after GGC: 17518k -> 17517k
    Maximum of released memory in single GGC run: 2363k
    Garbage: 67688k -> 67685k
    Leak: 7033k -> 7033k
    Overhead: 8420k -> 8420k
    GGC runs: 416

comparing combine.c compilation at -O2 level:
    Overall memory needed: 24368k -> 24372k
    Peak memory use before GGC: 17743k
    Peak memory use after GGC: 17518k
    Maximum of released memory in single GGC run: 2512k
    Garbage: 86965k -> 86964k
    Leak: 7214k -> 7214k
    Overhead: 11157k -> 11156k
    GGC runs: 478

comparing combine.c compilation at -O3 level:
  Amount of memory still referenced at the end of compilation increased from 7289k to 7305k, overall 0.22%
    Overall memory needed: 24884k -> 24880k
    Peak memory use before GGC: 17990k
    Peak memory use after GGC: 17578k
    Maximum of released memory in single GGC run: 3436k -> 3437k
    Garbage: 115875k -> 115875k
    Leak: 7289k -> 7305k
    Overhead: 14967k -> 14967k
    GGC runs: 537

comparing insn-attrtab.c compilation at -O0 level:
  Amount of memory still referenced at the end of compilation increased from 11321k to 11561k, overall 2.12%
    Overall memory needed: 83372k
    Peak memory use before GGC: 71655k
    Peak memory use after GGC: 45752k
    Maximum of released memory in single GGC run: 37689k
    Garbage: 151887k -> 151627k
    Leak: 11321k -> 11561k
    Overhead: 18884k -> 18883k
    GGC runs: 267

comparing insn-attrtab.c compilation at -O1 level:
    Overall memory needed: 116992k -> 116996k
    Peak memory use before GGC: 99596k
    Peak memory use after GGC: 89003k
    Maximum of released memory in single GGC run: 33389k
    Garbage: 296985k -> 296983k
    Leak: 11434k -> 11434k
    Overhead: 36876k -> 36876k
    GGC runs: 290

comparing insn-attrtab.c compilation at -O2 level:
    Overall memory needed: 157132k -> 157108k
    Peak memory use before GGC: 118682k
    Peak memory use after GGC: 88992k
    Maximum of released memory in single GGC run: 33523k
    Garbage: 391570k -> 391578k
    Leak: 11523k -> 11523k
    Overhead: 48978k -> 48978k
    GGC runs: 329

comparing insn-attrtab.c compilation at -O3 level:
    Overall memory needed: 157092k -> 157084k
    Peak memory use before GGC: 118684k
    Peak memory use after GGC: 88994k
    Maximum of released memory in single GGC run: 33523k
    Garbage: 392384k -> 392386k
    Leak: 11532k -> 11532k
    Overhead: 49101k -> 49101k
    GGC runs: 335

comparing Gerald's testcase PR8361 compilation at -O0 level:
    Overall memory needed: 124868k
    Peak memory use before GGC: 100729k
    Peak memory use after GGC: 99725k
    Maximum of released memory in single GGC run: 21556k
    Garbage: 230059k
    Leak: 53186k
    Overhead: 40063k
    GGC runs: 335

comparing Gerald's testcase PR8361 compilation at -O1 level:
    Overall memory needed: 107380k -> 107368k
    Peak memory use before GGC: 99640k
    Peak memory use after GGC: 98650k
    Maximum of released memory in single GGC run: 20173k
    Garbage: 439133k
    Leak: 55220k
    Overhead: 63147k
    GGC runs: 471

comparing Gerald's testcase PR8361 compilation at -O2 level:
    Overall memory needed: 107380k -> 107376k
    Peak memory use before GGC: 99640k
    Peak memory use after GGC: 98651k
    Maximum of released memory in single GGC run: 20173k
    Garbage: 495446k
    Leak: 55858k
    Overhead: 72718k
    GGC runs: 517

comparing Gerald's testcase PR8361 compilation at -O3 level:
    Overall memory needed: 112172k
    Peak memory use before GGC: 100838k
    Peak memory use after GGC: 99839k
    Maximum of released memory in single GGC run: 20573k
    Garbage: 508375k
    Leak: 56151k
    Overhead: 73625k
    GGC runs: 511

Head of the ChangeLog is:

--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog	2005-06-28 15:59:40.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog	2005-06-29 02:25:36.000000000 +0000
@@ -1,3 +1,224 @@
+2005-06-29  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	* config/sh/linux-unwind.h (shmedia_fallback_frame_state):
+	Disable	aliasing warning with void * cast.
+	(sh_fallback_frame_state): Likewise.
+
+2005-06-29  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	* target.h (gcc_target): New field allocate_initial_value.
+	* target-def.h (TARGET_ALLOCATE_INITIAL_VALUE): New macro.
+	(TARGET_INITIALIZER): Include it.
+	* integrate.c (allocate_initial_values): Use
+	targetm.allocate_initial_value.
+	* system.h: Poison ALLOCATE_INITIAL_VALUE.
+	* config/sh/sh-protos.h (sh_pr_n_sets): Delete.
+	* config/sh/sh.c (sh_pr_n_sets): Make it static.
+	(sh_allocate_initila_value): New function.
+	(TARGET_ALLOCATE_INITIAL_VALUE): Override default.
+	* config/sh/sh.h (ALLOCATE_INITIAL_VALUE): Delete.
+	* doc/tm.texi (TARGET_ALLOCATE_INITIAL_VALUE): Rename and
+	update from ALLOCATE_INITIAL_VALUE.
+
+2005-06-28  Richard Henderson  <rth@redhat.com>
+
+	* tree-vectorizer.c (vect_is_simple_reduction): Compare types
+	using TYPE_MAIN_VARIANT.
+
+2005-06-28  Richard Henderson  <rth@redhat.com>
+
+	* config/ia64/ia64.c (ia64_expand_vecint_compare): Decompose to EQ
+	when using psubN.uuu.
+
+2005-06-29  Kelley Cook <kcook@gcc.gnu.org>
+
+	* doc/gcc.texi: Update FSF address.
+
+2005-06-28  Eric Christopher  <echristo@redhat.com>
+
+	PR c/22052
+	PR c/21975
+	* c-decl.c (diagnose_mismatched_decls): Define DECL_EXTERN_INLINE.
+	Use. Fix detection of invalid extern inline redefinition.
+
+2005-06-28  Diego Novillo  <dnovillo@redhat.com>
+
+	* tree-optimize.c (init_tree_optimization_passes): Fix typo.
+
+2005-06-28  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	* config/rs6000/rs6000.md (setmemsi): s/operand/operands/.
+
+2005-06-28  Richard Henderson  <rth@redhat.com>
+
+	* config/ia64/ia64.c (ia64_expand_vecint_compare): Use unsigned
+	saturating subtraction for QI and HImode unsigned compares.  Use
+	bit arithmetic tricks for SImode unsigned compares.
+	(ia64_expand_vcondu_v2si): Remove.
+	(ia64_expand_vecint_cmov): Don't call it.
+
+2005-06-28  Richard Henderson  <rth@redhat.com>
+
+	* rtlanal.c (nonzero_bits1): Use the mode of the value for
+	determining integral-ness for comparisons.
+
+2005-06-28  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	* config/rs6000/rs6000.md (setmemsi): Fix operand 2.
+
+2005-06-28  Joseph S. Myers  <joseph@codesourcery.com>
+
+	* target.h (invalid_conversion, invalid_unary_op,
+	invalid_binary_op): New hooks.
+	* target-def.h (TARGET_INVALID_CONVERSION,
+	TARGET_INVALID_UNARY_OP, TARGET_INVALID_BINARY_OP,
+	TARGET_INITIALIZER): Likewise.
+	* hooks.h (hook_constcharptr_tree_tree_null,
+	hook_constcharptr_int_tree_null,
+	hook_constcharptr_int_tree_tree_null): New.
+	* hooks.c (hook_constcharptr_tree_tree_null,
+	hook_constcharptr_int_tree_null,
+	hook_constcharptr_int_tree_tree_null): Likewise.
+	* gcc/doc/tm.texi (TARGET_INVALID_CONVERSION,
+	TARGET_INVALID_UNARY_OP, TARGET_INVALID_BINARY_OP): Document.
+	* c-convert.c (convert): Use invalid_conversion hook.
+	* c-typeck.c (build_unary_op): Use invalid_unary_op hook.
+	(build_binary_op): Use invalid_binary_op hook.
+	* config/ia64/ia64-modes.def: Define RFmode.
+	* config/ia64/ia64-protos.h (spill_xfmode_operand): Remove.
+	(ia64_expand_movxf_movrf): New.
+	* config/ia64/ia64.md (movxf): Move code to
+	ia64_expand_movxf_movrf.
+	(movrf, movrf_internal): New.
+	* ia64.c (ia64_invalid_conversion, ia64_invalid_unary_op,
+	ia64_invalid_binary_op, TARGET_INVALID_CONVERSION,
+	TARGET_INVALID_UNARY_OP, TARGET_INVALID_BINARY_OP): New.
+	(spill_xfmode_operand): Rename to spill_xfmode_rfmode_operand.
+	Add mode parameter.  Make static.
+	(ia64_expand_movxf_movrf): New, moved from ia64.md.  Handle RFmode
+	as well as XFmode.
+	(ia64_function_arg, ia64_function_value, ia64_register_move_cost,
+	ia64_scalar_mode_supported_p): Handle RFmode as well as XFmode.
+	(ia64_init_builtins): Set up __fpreg as RFmode.
+	(ia64_mangle_fundamental_type): Mangle __fpreg as u7__fpreg.
+
+2006-06-28  Adrian Straetling  <straetling@de.ibm.com>
+
+	* builtins.c: (expand_builtin_memset): Rewrite to support
+	'set_storage_via_setmem'.
+	* expr.c: (enum insn_code setmem_optab): Define.
+	(enum insn_code clrmem_optab): Remove.
+	(set_storage_via_setmem): New function.
+	(clear_storage_via_setmem): Remove.
+	(clear_storage): Replace call to "clear_storage_via_clrmem" with
+	"set_storage_via_setmem".
+	* expr.h: (set_storage_via_setmem): Declare.
+	(CLEAR_RATIO): Redefine using HAVE_setmemM.
+	* optabs.h: (enum insn_code setmem_optab): Declare.
+	(enum insn_code clrmem_optab): Remove.
+	* optabs.c: (init_optabs): Initialize setmem_optab.
+	(enum insn_code clrmem_optab): Remove.
+	* genopinit.c: (otabs): Likewise.
+	* doc/md.texi: Document new standard pattern 'setmem'. Remove
+	  'clrmem'.
+	* config/alpha/alpha.c: (alpha_expand_block_clear): Adjust
+	'operands' ordering.
+	* config/frv/frv.c: (frv_expand_block_clear): Likewise.
+	* config/rs6000/rs6000.c: (expand_block_clear): Likewise.
+	* config/alpha/alpha.md: ("clrmemqi", "clrmemdi"): Rename to "setmemM".
+	FAIL on operands[2]!=const0_rtx. Adjust 'operands' ordering.
+	* config/avr/avr.md: ("clrmemhi"): Likewise.
+	* config/frv/frv.md: ("clrmemsi"): Likewise.
+	* config/i386/i386.md: ("clrmemsi", "clrmemdi"): Likewise.
+	* config/pa/pa.md: ("clrmemsi", "clrmemdi"): Likewise.
+	* config/rs6000/rs6000.md: ("clrmemsi"): Likewise.
+	* config/s390/s390.md: ("clrmem<mode>"): Likewise.
+
+2005-06-28  Paul Brook  <paul@codesourcery.com>
+
+	* Makefile.in: Set and use UNWIND_H.  Install as unwind.h.
+	* c-decl.c (finish_decl): Call default_init_unwind_resume_libfunc.
+	* except.c (add_ehspec_entry): Generate arm eabi filter lists.
+	(assign_filter_values): Ditto.
+	(output_ttype): New function.
+	(output_function_exception_table): Use output_ttype.  Generate arm
+	eabi filter lists.
+	(default_init_unwind_resume_libfunc): New function.
+	* except.h (default_init_unwind_resume_libfunc): Add prototype.
+	* optabs.c (init_optabs): Don't set unwind_resume_libfunc.
+	* opts.c (decode_options): Use targetm.unwind_tables_default.
+	* target-def.h (TARGET_ASM_TTYPE): Provide and use definition.
+	(TARGET_ARM_EABI_UNWINDER, TARGET_UNWIND_TABLES_DEFAULT): Ditto.
+	* target.h (struct gcc_target): Add asm.ttype, unwind_tables_default
+	and arm_eabi_unwinder.
+	* unwind-c.c: Support Arm EABI unwinder.
+	* unwind.h: Rename ...
+	* unwind-generic.h: ... To this.
+	* doc/tm.texi (TARGET_ASM_TTYPE, TARGET_ARM_EABI_UNWINDER): Document.
+	(TARGET_UNWID_TABLES_DEFAULT): Document.
+
+	* config/arm/arm-protos.h (arm_output_fn_unwind): Add prototype.
+	* config/arm/arm.c (arm_unwind_emit, arm_output_ttype): New functions.
+	(TARGET_UNWIND_EMIT, TARGET_ASM_TTYPE, TARGET_ARM_EABI_UNWINDER):
+	Define.
+	(thumb_pushpop, thumb_output_function_prologue): Output unwinding
+	directives.
+	(arm_unwind_emit_stm, arm_unwind_emit_set): New functions.
+	* config/arm/arm.h (MUST_USE_SJLJ_EXCEPTIONS): Only define when
+	!TARGET_UNWIND_INFO.
+	(ARM_OUTPUT_FN_UNWIND, ARM_EABI_UNWIND_TABLES): Define.
+	* config/arm/bpabi.h (TARGET_UNWIND_INFO): Define.
+	* config/arm/elf.h (ASM_DECLARE_FUNCTION_NAME,
+	ASM_DECLARE_FUNCTION_SIZE): Use ARM_OUTPUT_FN_UNWIND.
+	* config/arm/lib1funcs.asm: Include libunwind.S.
+	* config/arm/libgcc-bpabi.ver: Add unwinding routines.
+	* config/arm/libunwind.S: New file.
+	* config/arm/pr-support.c: New file.
+	* config/arm/t-bpabi (LIB1ASMFUNCS): Add _unwind.
+	(UNWIND_H, LIB2ADDEH, LIB2ADDEHDEP): Set.
+	* config/arm/t-symbian (UNWIND_H, LIB2ADDEH, LIB2ADDEHDEP): Set.
+	* config/arm/unwind-arm.c: New file.
+	* config/arm/unwind-arm.h: New file.
+	* config/i386/t-netware (USER_H): Remove unwind.h.
+	* config/ia64/ia64.h (TARGET_UNWIND_TABLES_DEFAULT): Define.
+
+2005-06-28  DJ Delorie  <dj@redhat.com>
+
+	* c-decl.c (pop_scope): Move warning control into warning call.
+	(diagnose_mismatched_decls): Likewise.
+	(pushdecl): Likewise.
+	(start_decl): Likewise.
+	(grokparms): Likewise.
+	(start_function): Likewise.
+	(store_parm_decls_newstyle): Likewise.
+	(store_parm_decls_oldstyle): Likewise.
+	(finish_function): Likewise.
+	(declspecs_add_scspec): Likewise.
+	* c-format.c (decode_format_attr): Likewise.
+	(maybe_read_dollar_number): Likewise.
+	(avoid_dollar_number): Likewise.
+	(finish_dollar_format_checking): Likewise.
+	(check_format_info): Likewise.
+	(check_format_info_main): Likewise.
+	(check_format_types): Likewise.
+	(format_type_warning): Likewise.
+	* c-typeck.c (function_types_compatible_p): Likewise.
+	(build_array_ref): Likewise.
+	(convert_arguments): Likewise.
+	(build_c_cast): Likewise.
+	(store_init_value): Likewise.
+	(process_init_element): Likewise.
+	(c_start_case): Likewise.
+	* stor-layout.c (finalize_record_size): Likewise.
+	* tree-cfg.c (execute_warn_function_noreturn): Likewise.
+	* tree-inline.c (expand_call_inline): Likewise.
+
+2005-06-28  Uros Bizjak  <uros@kss-loka.si>
+
+	PR target/22134
+	* config/i386/i386.md (fist<mode>2_with_temp splitter):
+	Clobber memory operand, not scratch register.
+
 2005-06-28  Andreas Krebbel  <krebbel1@de.ibm.com>
 
 	* config/s390/s390.c (machine_function): New field has_landing_pad_p.
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog.cp	2005-06-27 20:36:02.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/cp/ChangeLog	2005-06-29 02:25:43.000000000 +0000
@@ -1,3 +1,16 @@
+2005-06-28  Joseph S. Myers  <joseph@codesourcery.com>
+
+	* cvt.c (ocp_convert): Use invalid_conversion hook.
+	* typeck.c (build_binary_op): Use invalid_binary_op hook.
+	(build_unary_op): Use invalid_unary_op hook.
+
+2005-06-28  Paul Brook  <paul@codesourcery.com>
+
+	* Make-lang.in (cp/except.o): Depend on $(TARGET_H)
+	* except.c: Include target.h.
+	(init_exception_processing): Initialize unwind_resume_libfunc.
+	* doc/tm.texi: Document TARGET_ASM_TTYPE
+
 2005-06-26  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* call.c (build_over_call): Pass in named argument list to


The results can be reproduced by building a compiler with

--enable-gather-detailed-mem-stats targetting x86-64

and compiling preprocessed combine.c or testcase from PR8632 with:

-fmem-report --param=ggc-min-heapsize=1024 --param=ggc-min-expand=1 -Ox -Q

The memory consumption summary appears in the dump after detailed listing
of the places they are allocated in.  Peak memory consumption is actually
computed by looking for maximal value in {GC XXXX -> YYYY} report.

Your testing script.