| # needs-profiler-support |
| |
| -include ../tools.mk |
| |
| # This test makes sure that indirect call promotion is performed. The test |
| # programs calls the same function a thousand times through a function pointer. |
| # Only PGO data provides the information that it actually always is the same |
| # function. We verify that the indirect call promotion pass inserts a check |
| # whether it can make a direct call instead of the indirect call. |
| |
| # LLVM doesn't support instrumenting binaries that use SEH: |
| # https://github.com/rust-lang/rust/issues/61002 |
| # |
| # Things work fine with -Cpanic=abort though. |
| ifdef IS_MSVC |
| COMMON_FLAGS=-Cpanic=abort |
| endif |
| |
| all: |
| # We don't compile `opaque` with either optimizations or instrumentation. |
| # We don't compile `opaque` with either optimizations or instrumentation. |
| $(RUSTC) $(COMMON_FLAGS) opaque.rs |
| # Compile the test program with instrumentation |
| mkdir -p "$(TMPDIR)"/prof_data_dir |
| $(RUSTC) $(COMMON_FLAGS) interesting.rs \ |
| -Cprofile-generate="$(TMPDIR)"/prof_data_dir -O -Ccodegen-units=1 |
| $(RUSTC) $(COMMON_FLAGS) main.rs -Cprofile-generate="$(TMPDIR)"/prof_data_dir -O |
| # The argument below generates to the expected branch weights |
| $(call RUN,main) || exit 1 |
| "$(LLVM_BIN_DIR)"/llvm-profdata merge \ |
| -o "$(TMPDIR)"/prof_data_dir/merged.profdata \ |
| "$(TMPDIR)"/prof_data_dir |
| $(RUSTC) $(COMMON_FLAGS) interesting.rs \ |
| -Cprofile-use="$(TMPDIR)"/prof_data_dir/merged.profdata -O \ |
| -Ccodegen-units=1 --emit=llvm-ir |
| cat "$(TMPDIR)"/interesting.ll | "$(LLVM_FILECHECK)" filecheck-patterns.txt |
