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Add Additional Flags to PGO Build

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In GCC, we can add a couple more flags to give us confidence that the profile
data is actually being found and used.

Also, my system for example doesn't have a binary installed under the name
`llvm-profdata`, but it does have, e.g., `llvm-profdata-13`, etc. So this
commit adds a variable that can be overridden.
This commit is contained in:
W. Felix Handte
2023-01-20 17:32:49 -05:00
parent 64963dcbd6
commit 87e169d05d
1 changed files with 6 additions and 3 deletions
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9
programs/Makefile
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@@ -231,9 +231,12 @@ zstd-dll : zstd
## zstd-pgo: zstd executable optimized with PGO. ## zstd-pgo: zstd executable optimized with PGO.
.PHONY: zstd-pgo .PHONY: zstd-pgo
zstd-pgo : LLVM_PROFDATA?=llvm-profdata
zstd-pgo : PROF_GENERATE_FLAGS=-fprofile-generate $(if $(findstring gcc,$(CC)),-fprofile-dir=.)
zstd-pgo : PROF_USE_FLAGS=-fprofile-use $(if $(findstring gcc,$(CC)),-fprofile-dir=. -Werror=missing-profile -Wno-error=coverage-mismatch)
zstd-pgo : zstd-pgo :
$(MAKE) clean HASH_DIR=$(HASH_DIR) $(MAKE) clean HASH_DIR=$(HASH_DIR)
$(MAKE) zstd HASH_DIR=$(HASH_DIR) MOREFLAGS=-fprofile-generate $(MAKE) zstd HASH_DIR=$(HASH_DIR) MOREFLAGS="$(PROF_GENERATE_FLAGS)"
./zstd -b19i1 $(PROFILE_WITH) ./zstd -b19i1 $(PROFILE_WITH)
./zstd -b16i1 $(PROFILE_WITH) ./zstd -b16i1 $(PROFILE_WITH)
./zstd -b9i2 $(PROFILE_WITH) ./zstd -b9i2 $(PROFILE_WITH)
@@ -245,8 +248,8 @@ ifndef BUILD_DIR
else else
$(RM) zstd $(BUILD_DIR)/zstd $(BUILD_DIR)/*.o $(RM) zstd $(BUILD_DIR)/zstd $(BUILD_DIR)/*.o
endif endif
case $(CC) in *clang*) if ! [ -e default.profdata ]; then llvm-profdata merge -output=default.profdata default*.profraw; fi ;; esac case $(CC) in *clang*) if ! [ -e default.profdata ]; then $(LLVM_PROFDATA) merge -output=default.profdata default*.profraw; fi ;; esac
$(MAKE) zstd HASH_DIR=$(HASH_DIR) MOREFLAGS=-fprofile-use $(MAKE) zstd HASH_DIR=$(HASH_DIR) MOREFLAGS="$(PROF_USE_FLAGS)"
## zstd-small: minimal target, supporting only zstd compression and decompression. no bench. no legacy. no other format. ## zstd-small: minimal target, supporting only zstd compression and decompression. no bench. no legacy. no other format.
CLEAN += zstd-small zstd-frugal CLEAN += zstd-small zstd-frugal