forked from OSchip/llvm-project
974d4eea93
Summary: This increases the inlining threshold for hot callsites. Hotness is defined in terms of block frequency of the callsite relative to the caller's entry block's frequency. Since this requires BFI in the inliner, this only affects the new PM pipeline. This is enabled by default at -O3. This improves the performance of some internal benchmarks. Notably, an internal benchmark for Gipfeli compression (https://github.com/google/gipfeli) improves by ~7%. Povray in SPEC2006 improves by ~2.5%. I am running more experiments and will update the thread if other benchmarks show improvement/regression. In terms of text size, LLVM test-suite shows an 1.22% text size increase. Diving into the results, 13 of the benchmarks in the test-suite increases by > 10%. Most of these are small, but Adobe-C++/loop_unroll (17.6% increases) and tramp3d(20.7% size increase) have >250K text size. On a large application, the text size increases by 2% Reviewers: chandlerc, davidxl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D36199 llvm-svn: 309994 |
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| clang | ||
| clang-tools-extra | ||
| compiler-rt | ||
| debuginfo-tests | ||
| libclc | ||
| libcxx | ||
| libcxxabi | ||
| libunwind | ||
| lld | ||
| lldb | ||
| llgo | ||
| llvm | ||
| openmp | ||
| parallel-libs | ||
| polly | ||