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| author | Jim Lin <jim@andestech.com> | 2021-05-21 22:50:44 +0800 |
|---|---|---|
| committer | Jim Lin <jim@andestech.com> | 2021-05-21 23:02:19 +0800 |
| commit | 445680593889199667d60207e302bc870f650fa5 (patch) | |
| tree | 210c058f78fcd13259de05dcec4bbc527e00681e /llvm/lib/CodeGen/MachineDebugify.cpp | |
| parent | 35e5c3310fb0d974b6a151c775ac46a3c3a0e151 (diff) | |
| download | llvm-445680593889199667d60207e302bc870f650fa5.zip llvm-445680593889199667d60207e302bc870f650fa5.tar.gz llvm-445680593889199667d60207e302bc870f650fa5.tar.bz2 | |
[X86] Don't fold (fneg (fma (fneg X), Y, (fneg Z))) to (fma X, Y, Z)
Check if it has no signed zeros flag (nsz) in getNegatedExpression for x86.
This patch fixed miscompilation: https://alive2.llvm.org/ce/z/XxwBAJ
Reviewed By: RKSimon, spatel
Differential Revision: https://reviews.llvm.org/D90901
Diffstat (limited to 'llvm/lib/CodeGen/MachineDebugify.cpp')
0 files changed, 0 insertions, 0 deletions