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D57985.diff
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Sat, Jul 20, 7:12 AM

D57985.diff

Index: test-suite/trunk/CMakeLists.txt
===================================================================
--- test-suite/trunk/CMakeLists.txt
+++ test-suite/trunk/CMakeLists.txt
@@ -94,6 +94,8 @@
endif()
endif()
+option(TEST_SUITE_USE_IR_PGO
+ "Use IR PGO instrumentation (requires TEST_SUITE_PROFILE_GENERATE)" OFF)
# Enable profile generate mode in lit. Note that this does not automatically
# add something like -fprofile-instr-generate to the compiler flags.
@@ -109,9 +111,15 @@
endif()
set(TEST_SUITE_PROFILE_GENERATE "True")
- list(APPEND CFLAGS -fprofile-instr-generate)
- list(APPEND CXXFLAGS -fprofile-instr-generate)
- list(APPEND LDFLAGS -fprofile-instr-generate)
+
+ set(profile_instrumentation_flags -fprofile-instr-generate)
+ if(TEST_SUITE_USE_IR_PGO)
+ set(profile_instrumentation_flags -fprofile-generate)
+ endif()
+
+ list(APPEND CFLAGS ${profile_instrumentation_flags})
+ list(APPEND CXXFLAGS ${profile_instrumentation_flags})
+ list(APPEND LDFLAGS ${profile_instrumentation_flags})
else()
set(TEST_SUITE_PROFILE_GENERATE "False")
endif()
Index: test-suite/trunk/litsupport/README.md
===================================================================
--- test-suite/trunk/litsupport/README.md
+++ test-suite/trunk/litsupport/README.md
@@ -70,7 +70,8 @@
ssh to run benchmarks on a remote device (assuming shared file systems).
- `cmake -DTEST_SUITE_PROFILE_GENERATE` compiles benchmark with
`-fprofile-instr-generate` and enables the `profilegen` module that runs
- `llvm-profdata` after running the benchmarks.
+ `llvm-profdata` after running the benchmarks. To use LLVM IR PGO instead of
+ the clang frontend's PGO feature, set `-DTEST_SUITE_USE_IR_PGO=On`.
Available modules are found in the `litsupport/modules` directory.

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