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| author | Evan Cheng <evan.cheng@apple.com> | 2010-05-19 01:08:17 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-05-19 01:08:17 +0000 |
| commit | abd0ad54a475bffd74ad67bf66aa0a060523ccab (patch) | |
| tree | fc7bb88098c16c96e3cccba0dea26f85e52aa11e /llvm/lib/Support/Timer.cpp | |
| parent | 58c6f21453aff3b6d2cbf1ac08a96107c1d68718 (diff) | |
| download | bcm5719-llvm-abd0ad54a475bffd74ad67bf66aa0a060523ccab.tar.gz bcm5719-llvm-abd0ad54a475bffd74ad67bf66aa0a060523ccab.zip | |
Intrinsics which do a vector compare (results are all zero or all ones) are modeled as icmp / fcmp + sext. This is turned into a vsetcc by dag combine (yes, not a good long term solution). The targets can then isel the vsetcc to the appropriate instruction.
The trouble arises when the result of a vector cmp + sext is then and'ed with all ones. Instcombine will turn it into a vector cmp + zext, dag combiner will miss turning it into a vsetcc and hell breaks loose after that.
Teach dag combine to turn a vector cpm + zest into a vsetcc + and 1. This fixes rdar://7923010.
llvm-svn: 104094
Diffstat (limited to 'llvm/lib/Support/Timer.cpp')
0 files changed, 0 insertions, 0 deletions
