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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2017-05-29 16:25:20 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2017-05-29 16:25:20 +0000 |
| commit | fd1952761ed3691ef118f6ef4c6cc51b4d37de75 (patch) | |
| tree | e01c8b0290fce6d9c06d0cbe3d027c09d92fc51d /libcxx/benchmarks/algorithms.bench.cpp | |
| parent | eed7a3102c51d863ff9035d31a33313e77364692 (diff) | |
| download | bcm5719-llvm-fd1952761ed3691ef118f6ef4c6cc51b4d37de75.tar.gz bcm5719-llvm-fd1952761ed3691ef118f6ef4c6cc51b4d37de75.zip | |
[X86] Don't fold away the memory operand of an xchg.
xchg with a mem operand has different locking semantics. If we unfold it
into a xchg r,r we will loose the implicit lock. Likewise we never want
to fold a register xchg into a memory one as it would be a lot slower.
This triggers during LLVM selfhost.
llvm-svn: 304163
Diffstat (limited to 'libcxx/benchmarks/algorithms.bench.cpp')
0 files changed, 0 insertions, 0 deletions
