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(parent: 7d60fe0) | patch
InstCombine: Rely on cmpxchg's return code when it's strong
authorDavid Majnemer <david.majnemer@gmail.com>
Thu, 6 Nov 2014 23:23:30 +0000 (23:23 +0000)
committerDavid Majnemer <david.majnemer@gmail.com>
Thu, 6 Nov 2014 23:23:30 +0000 (23:23 +0000)
commit98066413ca49bc8bcca445bbd5bd3620c5ae49fc
treeab9848b2b8faa33dff2657d987245cf4a6bc75c2tree | snapshot
parent7d60fe047a8ead7ac64d8b9b94ad64f2ee9d2f66commit | diff
InstCombine: Rely on cmpxchg's return code when it's strong

Comparing the result of a cmpxchg instruction can be replaced with an
extractvalue of the cmpxchg success indicator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221498 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/InstCombine/InstCombineCompares.cpp diff | blob | history
test/Transforms/InstCombine/icmp.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors