src/test/run-make-fulldeps/pgo-branch-weights/Makefile

   1 # needs-profiler-support
   2 # ignore-windows-gnu
   3
   4 # FIXME(mati865): MinGW GCC miscompiles compiler-rt profiling library but with Clang it works
   5 # properly. Since we only have GCC on the CI ignore the test for now.
   6
   7 -include ../tools.mk
   8
   9 # For some very small programs GNU ld seems to not properly handle
  10 # instrumentation sections correctly. Neither Gold nor LLD have that problem.
  11 ifeq ($(UNAME),Linux)
  12 ifneq (,$(findstring x86,$(TARGET)))
  13 COMMON_FLAGS=-Clink-args=-fuse-ld=gold
  14 endif
  15 endif
  16
  17
  18 all:
  19         # We don't compile `opaque` with either optimizations or instrumentation.
  20         $(RUSTC) $(COMMON_FLAGS) opaque.rs || exit 1
  21         # Compile the test program with instrumentation
  22         mkdir -p "$(TMPDIR)/prof_data_dir" || exit 1
  23         $(RUSTC) $(COMMON_FLAGS) interesting.rs \
  24                 -Cprofile-generate="$(TMPDIR)/prof_data_dir" -O -Ccodegen-units=1 || exit 1
  25         $(RUSTC) $(COMMON_FLAGS) main.rs -Cprofile-generate="$(TMPDIR)/prof_data_dir" -O || exit 1
  26         # The argument below generates to the expected branch weights
  27         $(call RUN,main aaaaaaaaaaaa2bbbbbbbbbbbb2bbbbbbbbbbbbbbbbcc) || exit 1
  28         "$(LLVM_BIN_DIR)/llvm-profdata" merge \
  29                 -o "$(TMPDIR)/prof_data_dir/merged.profdata" \
  30                 "$(TMPDIR)/prof_data_dir" || exit 1
  31         $(RUSTC) $(COMMON_FLAGS) interesting.rs \
  32                 -Cprofile-use="$(TMPDIR)/prof_data_dir/merged.profdata" -O \
  33                 -Ccodegen-units=1 --emit=llvm-ir || exit 1
  34         cat "$(TMPDIR)/interesting.ll" | "$(LLVM_FILECHECK)" filecheck-patterns.txt