projects / oota-llvm.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: 4645509) | patch
Change instcombine's getShuffleMask to represent undef with negative values.
authorBob Wilson <bob.wilson@apple.com>
Fri, 29 Oct 2010 22:03:05 +0000 (22:03 +0000)
committerBob Wilson <bob.wilson@apple.com>
Fri, 29 Oct 2010 22:03:05 +0000 (22:03 +0000)
commit822cb58d087ab67804037807e130273481b86137
tree615e77dbe1edd2ba92973d3a4b39848a5d0094a9tree | snapshot
parent46455096bea2b6c81bb4b0226701524d2a9eb242commit | diff
Change instcombine's getShuffleMask to represent undef with negative values.
This code had previously used 2*N, where N is the mask length, to represent
undef.  That is not safe because the shufflevector operands may have more
than N elements -- they don't have to match the result type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117721 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/InstCombine/InstCombineVectorOps.cpp diff | blob | history
test/Transforms/InstCombine/vec_shuffle.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors