Enhances the gcov program summary by adding a histogram of arc counter
entries. This is used to compute working set information in the compiler
for use by optimizations that need information on hot vs cold counter
values or the rough working set size in terms of the number of counters.
Each working set data point is the minimum counter value and number of
counters required to reach a given percentage of the cumulative counter
sum across the profiled execution (sum_all in the program summary).
2012-09-04 Teresa Johnson <tejohnson@google.com>
* libgcc/libgcov.c (struct gcov_summary_buffer): New structure.
(gcov_histogram_insert): New function.
(gcov_compute_histogram): Ditto.
(gcov_exit): Invoke gcov_compute_histogram, and perform merging of
histograms during summary merging.
* gcc/gcov-io.c (gcov_write_summary): Write out non-zero histogram
entries to function summary along with an occupancy bit vector.
(gcov_read_summary): Read in the histogram entries.
(gcov_histo_index): New function.
(void gcov_histogram_merge): Ditto.
* gcc/gcov-io.h (gcov_type_unsigned): New type.
(struct gcov_bucket_type): Ditto.
(struct gcov_ctr_summary): Include histogram.
(GCOV_TAG_SUMMARY_LENGTH): Update to include histogram entries.
(GCOV_HISTOGRAM_SIZE): New macro.
(GCOV_HISTOGRAM_BITVECTOR_SIZE): Ditto.
* gcc/profile.c (NUM_GCOV_WORKING_SETS): Ditto.
(gcov_working_sets): New global variable.
(compute_working_sets): New function.
(find_working_set): Ditto.
(get_exec_counts): Invoke compute_working_sets.
* gcc/coverage.c (read_counts_file): Merge histograms, and
fix bug with accessing summary info for non-summable counters.
* gcc/basic-block.h (gcov_type_unsigned): New type.
(struct gcov_working_set_info): Ditto.
(find_working_set): Declare.
* gcc/gcov-dump.c (tag_summary): Dump out histogram.
From-SVN: r190953
libgcc/
* config.host (x86_64-*-openbsd*): New target.
gcc/
* config.gcc (x86_64-*-openbsd*): New target.
* config.host (*-*-openbsd*): New target.
* config/openbsd.h (TARGET_C99_FUNCTIONS): Define.
* config/i386/openbsdelf.h: Remove some superfluous defines and
group things together in a more logical fashion.
(DBX_REGISTER_NUMBER): Provide a
definition that works on both 32-bit and 64-bit targets.
(WCHAR_TYPE_SIZE): Hardcode as 32.
(NO_DOLLAR_IN_LABEL): Remove undef.
(TARGET_DEFAULT): Remove.
(SET_ASM_OP): Remove.
(DEFAULT_PCC_STRUCT_RETURN): Undef first to prevent warning.
(ASM_OUTPUT_MAX_SKIP_ALIGN): Synch with x86-64.h
(DWARF2_UNWIND_INFO): Remove define.
(HAVE_ENABLE_EXECUTE_STACK): Define.
* config/host-openbsd.c: New file.
* config/t-openbsd (USER_H): Add EXTRA_HEADERS.
* config/x-openbsd: New file.
From-SVN: r190863
* Makefile.in (fixed-funcs,fixed-conv-funcs): filter-out
LIB2FUNCS_EXCLUDE before adding them to libgcc-objects,
libgcc-s-objects.
* fixed-obj.mk: Only expand dependency if $o is not in
LIB2FUNCS_EXCLUDE.
From-SVN: r190624
* Makefile.in (vis_hide, gen-hide-list): Do not make definitions
depend on --enable-shared.
($(lib1asmfuncs-o)): Use %.vis files independent of
--enable-shared.
* static-object.mk ($(base)$(objext), $(base).vis)
($(base)_s$(objext)): Use same rules for visibility handling as in
shared-object.mk.
From-SVN: r190588
gcc/
* coverage.c: Refer to "notes file" instead of "graph file"
in all comments. Explain history of bbg prefix.
* gcov-io.h: Likewise.
* gcov.c: Likewise.
(find_source): Likewise in fnotice.
(read_graph_file): Likewise.
(read_count_file): Likewise.
* doc/gcov.texi: Document -fprofile-dir flag. Add "notes file"
and "data file" explicitly in the explanation of the files.
libgcc/
* libgcov.c (__gcov_ior_profiler): Benign comment fix.
From-SVN: r189781
* config/i386/sfp-machine.h (FP_HANDLE_EXCEPTIONS): Use
__builtin_expect when checking for exceptions.
* config/ia64/sfp-machine.h (FP_HANDLE_EXCEPTIONS): Ditto.
From-SVN: r188705
2012-06-11 Sriraman Tallam <tmsriram@google.com>
* config/i386/libgcc-bsd.ver: Version symbol __cpu_indicator_init.
* config/i386/libgcc-sol2.ver: Ditto.
* config/i386/libgcc-glibc.ver: Ditto.
* gcc.target/i386/builtin_target.c (vendor_signatures): New enum.
(check_intel_cpu_model): New function.
(check_amd_cpu_model): New function.
(check_features): New function.
(__get_cpuid_output): New function.
(check_detailed): New function.
(fn1): Rename to quick_check.
(main): Update to call quick_check and call check_detailed.
From-SVN: r188417
* gthr-posix.h [neither FreeBSD nor Solaris] (__gthread_active_p):
If __GLIBC__ is defined, refer to __pthread_key_create instead of
pthread_cancel.
From-SVN: r188400
libgcc/
* longlong.h [SPARC] (umul_ppmm, udiv_qrnnd): Use hardware integer multiply
and divide instructions on 32-bit when V9.
(add_ssaaaa, sub_ddmmss): Convert to branchless code on 64-bit.
From-SVN: r188090
libgcc/:
* config/i386/morestack.S (__morestack_non_split): Check whether
caller is varargs and needs %bp to hold the stack frame on return.
gcc/testsuite/:
* gcc.dg/split-6.c: New test.
From-SVN: r187894
2012-05-21 Andrew Pinski <apinski@cavium.com>
PR bootstrap/53183
* configure.ac: Define the default includes to being none.
* configure: Regenerate.
From-SVN: r187732
libgcc/
* Makefile.in (install-unwind_h): Rename into ...
(install-unwind_h-forbuild): New target.
(all): Use it instead of the former install-unwind_h.
(install-unwind_h): Reinstate, copy to user install destination
for include files, not to the internal gcc object directory one.
(install-leaf): Depend on it.
From-SVN: r187599
libgcc/
* config/rs6000/aix-unwind.h (*_REGNO): New, set of useful
register numbers. LR_REGNO replaces R_LR.
(ucontext_for): New, helper for ...
(ppc_aix_fallback_frame_state): New, implementation for aix 5.2
and 5.3 of ...
(MD_FALLBACK_FRAME_STATE_FOR): Define for 32bit configurations.
testsuite/
* g++.dg/eh/sighandle.C: New testcase.
From-SVN: r187540
This patch adds functionality to libgcov to enable user applications to
collect profile data only in regions of interest. This is useful, for
example, to collect profile data from a long-running server only
during the time when it is serving requests.
Specifically, the new routines __gcov_reset will clear all profile counters
to zero and __gcov_dump will write out the profile information collected so
far. A global variable is used to prevent writing out the profile a
second time during exit.
2012-05-08 Teresa Johnson <tejohnson@google.com>
* libgcc/libgcov.c (gcov_clear, __gcov_reset): New functions.
(__gcov_dump): Ditto.
(gcov_dump_complete): New global variable.
(gcov_exit): Export hidden to enable use in L_gcov_dump.
(__gcov_flush): Outline functionality now in gcov_clear.
* libgcc/Makefile.in (L_gcov_reset, L_gcov_dump): Define.
* gcc/gcov-io.h (__gcov_reset, __gcov_dump): Declare.
* gcc/doc/gcov.texi: Add note on using __gcov_reset and __gcov_dump.
From-SVN: r187297
gcc/
* config/rs6000/rs6000 (SAVE_INLINE_VRS, REST_INLINE_VRS,
V_SAVE_INLINE, SAVRES_LR, SAVRES_SAVE, SAVRES_REG,
SAVRES_GPR, SAVRES_FPR, SAVRES_VR): Define.
(no_global_regs_above): Delete.
(no_global_regs): New function.
(rs6000_savres_strategy): Handle vector regs. Use proper lr_save_p
value for load multiple test.
(savres_routine_syms): Increase size.
(rs6000_savres_routine_name, rs6000_savres_routine_sym,
ptr_regno_for_savres, rs6000_emit_savres_rtx): Pass in int selector
rather than a number of boolean flags. Update all callers.
(rs6000_savres_routine_name): Generate vector save/restore names.
(rs6000_savres_routine_sym): Handle vector regs. Delete forward decl.
(ptr_regno_for_savres, rs6000_emit_savres_rtx): Likewise.
(rs6000_emit_prologue): Delete saving_FPRs_inline, saving_GPRs_inline
and using_store_multiple. Expand uses. Don't always use r11 as
frame reg when needed for out-of-line saves. Set up initial offset
for out-of-line vector saves when buying stack frame. Handle pointer
reg setup for out-of-line fp save. Emit call to out-of-line vector
save function. Choose r11 or r12 for vrsave reg when available for
better scheduling.
(rs6000_output_function_prologue): Don't emit .extern for ELF.
(rs6000_emit_epilogue): Choose a better frame reg when restoring
from back-chain to suit out-of-line vector restore functions. Emit
call to out-of-line vector restore function. Adjust register used
for cr restore. Tweak pointer register setup for gpr restore.
* config/rs6000/rs6000.h (FIRST_SAVED_GP_REGNO): Take into account
FIXED_R13.
* config/rs6000/sysv4.h (FP_SAVE_INLINE, GP_SAVE_INLINE): Simplify.
(V_SAVE_INLINE): Define.
* config/rs6000/altivec.md (save_vregs_*, restore_vregs_*): New insns.
libgcc/
* config/rs6000/crtsavevr.S: New file.
* config/rs6000/crtrestvr.S: New file.
* config/rs6000/t-savresfgpr: Build the above.
* config/rs6000/t-netbsd: Likewise.
From-SVN: r186800
2012-04-24 Sriraman Tallam <tmsriram@google.com>
This patch adds new builtins to check for cpu type and features.
* __builtin_cpu_is ("<CPUNAME>")
* __builtin_cpu_supports ("<FEATURE>")
apart from the cpu init builtin, __builtin_cpu_init.
List of CPU names :
* "amd"
* "intel"
* "atom"
* "core2"
* "corei7"
* "nehalem"
* "westmere"
* "sandybridge"
* "amdfam10h"
* "barcelona"
* "shanghai"
* "istanbul"
* "bdver1"
* "bdver2"
List of CPU features :
* "cmov"
* "mmx"
* "popcnt"
* "sse"
* "sse2"
* "sse3"
* "ssse3"
* "sse4.1"
* "sse4.2"
* "avx"
* config/i386/i386.c (build_processor_model_struct): New function.
(make_var_decl): New function.
(fold_builtin_cpu): New function.
(ix86_fold_builtin): New function.
(make_cpu_type_builtin): New function.
(ix86_init_platform_type_builtins): New function.
(ix86_expand_builtin): Expand new builtins by folding them.
(ix86_init_builtins): Make new builtins to detect CPU type.
(TARGET_FOLD_BUILTIN): New macro.
(IX86_BUILTIN_CPU_INIT): New enum value.
(IX86_BUILTIN_CPU_IS): New enum value.
(IX86_BUILTIN_CPU_SUPPORTS): New enum value.
* config/i386/i386-builtin-types.def: New function type.
* testsuite/gcc.target/builtin_target.c: New testcase.
* doc/extend.texi: Document builtins.
* libgcc/config/i386/i386-cpuinfo.c: New file.
* libgcc/config/i386/t-cpuinfo: New file.
* libgcc/config.host: Include t-cpuinfo.
* libgcc/config/i386/libgcc-glibc.ver: Version symbol __cpu_model.
From-SVN: r186789
