tests/run-make/pgo-branch-weights/Makefile

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