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(parent: 65ed4d4) | patch
[DAGCombiner] Support folding (mulhs/u X, 0)->0 for vectors.
authorCraig Topper <craig.topper@intel.com>
Mon, 11 Dec 2017 08:33:20 +0000 (08:33 +0000)
committerCraig Topper <craig.topper@intel.com>
Mon, 11 Dec 2017 08:33:20 +0000 (08:33 +0000)
commitad45bf5895182563b2d107e4ecb76d0e340ebd17
tree72a939dc51278ff2055ab7cff68a9eeaf66240c6tree | snapshot
parent65ed4d4492321f3f6f0417dc9be4c5e5cc910b1ecommit | diff
[DAGCombiner] Support folding (mulhs/u X, 0)->0 for vectors.

We should probably also fold (mulhs/u X, 1) for vectors, but that's harder.

llvm-svn: 320344
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp diff | blob | history
llvm/test/CodeGen/X86/pr34855.ll diff | blob | history
Domain: System / Toolchain;