Fix PGO Build for clang

This fixes https://github.com/official-stockfish/Stockfish/issues/167.

Additional improvments by Joost VandeVondele.

diff --git a/src/Makefile b/src/Makefile
index e7c2c964fcb22f3f9aed3ab19999cda461a74808..823d98d28553d5f8f82b4529bb594c695fbe5dd6 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -215,10 +215,15 @@ endif
 ifeq ($(comp),icc)
        profile_make = icc-profile-make
        profile_use = icc-profile-use
+else
+ifeq ($(comp),clang)
+       profile_make = clang-profile-make
+       profile_use = clang-profile-use
 else
        profile_make = gcc-profile-make
        profile_use = gcc-profile-use
 endif
+endif
 
 ifeq ($(KERNEL),Darwin)
        CXXFLAGS += -arch $(arch) -mmacosx-version-min=10.9
@@ -414,7 +419,8 @@ help:
 
 
 .PHONY: help build profile-build strip install clean objclean profileclean help \
-        config-sanity icc-profile-use icc-profile-make gcc-profile-use gcc-profile-make
+        config-sanity icc-profile-use icc-profile-make gcc-profile-use gcc-profile-make \
+        clang-profile-use clang-profile-make
 
 build: config-sanity
        $(MAKE) ARCH=$(ARCH) COMP=$(COMP) all
@@ -454,6 +460,7 @@ objclean:
 profileclean:
        @rm -rf profdir
        @rm -f bench.txt *.gcda ./syzygy/*.gcda *.gcno ./syzygy/*.gcno
+       @rm -f stockfish.profdata *.profraw
 
 default:
        help
@@ -501,9 +508,22 @@ config-sanity:
 $(EXE): $(OBJS)
        $(CXX) -o $@ $(OBJS) $(LDFLAGS)
 
+clang-profile-make:
+       $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
+       EXTRACXXFLAGS='-fprofile-instr-generate ' \
+       EXTRALDFLAGS=' -fprofile-instr-generate' \
+       all
+
+clang-profile-use:
+       llvm-profdata merge -output=stockfish.profdata *.profraw
+       $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
+       EXTRACXXFLAGS='-fprofile-instr-use=stockfish.profdata' \
+       EXTRALDFLAGS='-fprofile-use ' \
+       all
+
 gcc-profile-make:
        $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
-       EXTRACXXFLAGS='-fprofile-generate' \
+       EXTRACXXFLAGS='-fprofile-generate'\
        EXTRALDFLAGS='-lgcov' \
        all