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(parent: 618c1db) | patch
Added instcombine pattern to spot comparing -val or val against 0.
authorPete Cooper <peter_cooper@apple.com>
Thu, 1 Dec 2011 03:58:40 +0000 (03:58 +0000)
committerPete Cooper <peter_cooper@apple.com>
Thu, 1 Dec 2011 03:58:40 +0000 (03:58 +0000)
commit65a6b57c330361d1075af146300d6aab9059659c
tree1bfe69eb5b5b86e661d97e27a56295cb0f20034ftree | snapshot
parent618c1dbd293d15ee19f61b1156ab8086ad28311acommit | diff
Added instcombine pattern to spot comparing -val or val against 0.
(val != 0) == (-val != 0) so "abs(val) != 0" becomes "val != 0"

Fixes <rdar://problem/10482509>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145563 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/InstCombine/InstCombineCompares.cpp diff | blob | history
test/Transforms/InstCombine/compare-abs-nonzero.ll [new file with mode: 0644] blob
C/C++ LLVM-based compilers that forbids OOTA behaviors