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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-10-22 18:35:13 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-10-22 18:35:13 +0000 |
| commit | 476c9f42fc5a60678e6c8275803164ace9ab7bff (patch) | |
| tree | 784580ff9c8acb2b277812f4cc6e9358130ce1de /llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp | |
| parent | 8bafbfea9d2c7e591adc0abb3ec2806567b50c47 (diff) | |
| download | bcm5719-llvm-476c9f42fc5a60678e6c8275803164ace9ab7bff.tar.gz bcm5719-llvm-476c9f42fc5a60678e6c8275803164ace9ab7bff.zip | |
[X86][SSE] Tidyup DecodeVPERMILPMask shuffle mask decoding
Add support for UNDEF raw mask elements and remove the ConstantPool DecodeVPERMILPMask usage in X86ISelLowering.cpp
llvm-svn: 344933
Diffstat (limited to 'llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp b/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp index fe567f4cece..4bd5df44abd 100644 --- a/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp +++ b/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp @@ -501,6 +501,10 @@ void DecodeVPERMILPMask(unsigned NumElts, unsigned ScalarBits, for (unsigned i = 0, e = RawMask.size(); i < e; ++i) { uint64_t M = RawMask[i]; + if (M == (uint64_t)SM_SentinelUndef) { + ShuffleMask.push_back(M); + continue; + } M = (ScalarBits == 64 ? ((M >> 1) & 0x1) : (M & 0x3)); unsigned LaneOffset = i & ~(NumEltsPerLane - 1); ShuffleMask.push_back((int)(LaneOffset + M)); |
