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Change profile-build options to produce 1% to 2% faster executables.

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The "@rm ucioption.gc*" line is necessary to avoid a gcc 4.7.x bug.
Confirmed for gcc 4.7.4, 4.8.1, and 4.9.1
Suggested by Kiran Panditrao on fishcooking forum.
https://groups.google.com/forum/?fromgroups=#!topic/fishcooking/AY8gN53nG18

No functional change.

Resolves #160
This commit is contained in:
mstembera 2014-12-19 03:56:00 +08:00 • committed by Gary Linscott
parent b8fd1a78dc
commit 46d5fff01f
1 changed files with 5 additions and 2 deletions
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7
src/Makefile
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@ -373,6 +373,9 @@ profile-build:
@$(PGOBENCH) > /dev/null @$(PGOBENCH) > /dev/null
@echo "" @echo ""
@echo "Step 3/4. Building final executable ..." @echo "Step 3/4. Building final executable ..."
# Deleting corrupt ucioption.gc* profile files is necessary to avoid an
# "internal compiler error" for gcc versions 4.7.x
@rm ucioption.gc*
@touch *.cpp *.h syzygy/*.cpp syzygy/*.h @touch *.cpp *.h syzygy/*.cpp syzygy/*.h
$(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_use) $(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_use)
@echo "" @echo ""
@ -439,13 +442,13 @@ gcc-profile-prepare:
gcc-profile-make: gcc-profile-make:
$(MAKE) ARCH=$(ARCH) COMP=$(COMP) \ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
EXTRACXXFLAGS='-fprofile-generate' \ EXTRACXXFLAGS='-fprofile-arcs' \
EXTRALDFLAGS='-lgcov' \ EXTRALDFLAGS='-lgcov' \
all all
gcc-profile-use: gcc-profile-use:
$(MAKE) ARCH=$(ARCH) COMP=$(COMP) \ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
EXTRACXXFLAGS='-fprofile-use' \ EXTRACXXFLAGS='-fbranch-probabilities' \
EXTRALDFLAGS='-lgcov' \ EXTRALDFLAGS='-lgcov' \
all all