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[PowerPC] [FastISel] i1 constants must be zero extended
authorHal Finkel <hfinkel@anl.gov>
Thu, 25 Dec 2014 23:08:25 +0000 (23:08 +0000)
committerHal Finkel <hfinkel@anl.gov>
Thu, 25 Dec 2014 23:08:25 +0000 (23:08 +0000)
commitd7b2788e51bd8ebfd7818c804959be8998dcfd81
tree21acc0a970d1de7d617093661b93a37c309daba9tree | snapshot
parentb5829491039c28ee92fdd40b33980c1a22629c8ecommit | diff
[PowerPC] [FastISel] i1 constants must be zero extended

When materializing constant i1 values, they must be zero extended. We represent
i1 values as [0, 1], not [0, -1], in i32 registers. As it turns out, this code
path was dead for i1 values prior to r216006 (which is why this did not manifest in
miscompiles until recently).

Fixes -O0 self-hosting on PPC64/Linux.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224842 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Target/PowerPC/PPCFastISel.cpp diff | blob | history
test/CodeGen/PowerPC/fast-isel-const.ll [new file with mode: 0644] blob
C/C++ LLVM-based compilers that forbids OOTA behaviors