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[SelectionDAG] Teach LegalizeVectorOps to not unroll CTLZ_ZERO_UNDEF and CTTZ_ZERO_UN...
authorCraig Topper <craig.topper@gmail.com>
Sun, 27 Dec 2015 21:33:47 +0000 (21:33 +0000)
committerCraig Topper <craig.topper@gmail.com>
Sun, 27 Dec 2015 21:33:47 +0000 (21:33 +0000)
commit04df59213b8671148c6643e4e167eb51c64cd6f0
tree70a6b8b02fa31e061daab9a892efdf5407b2035atree | snapshot
parent1422e1f158810323cfbe06d9242ba35c3f674921commit | diff
[SelectionDAG] Teach LegalizeVectorOps to not unroll CTLZ_ZERO_UNDEF and CTTZ_ZERO_UNDEF if the non-ZERO_UNDEF form is legal or custom. Will be used to simplify X86 code in a follow on commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256476 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors