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[X86] Give KSET0* and KSET1* pseudos the same scheduler resource usage as KXOR/KXNOR. 

These aren't recognized as idioms by the CPU so they still use
execution resources. We just use the pseudo to force the input
register to k0.
This commit is contained in:
Craig Topper 2020-02-04 12:37:19 -08:00
parent 2d89e0a098
commit c67773bebe
1 changed files with 2 additions and 0 deletions
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llvm/lib/Target/X86/X86SchedSkylakeServer.td
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@ -620,6 +620,8 @@ def: InstRW<[SKXWriteResGroup1], (instregex "KAND(B|D|Q|W)rr",
"KOR(B|D|Q|W)rr",
"KXNOR(B|D|Q|W)rr",
"KXOR(B|D|Q|W)rr",
"KSET0(B|D|Q|W)", // Same as KXOR
"KSET1(B|D|Q|W)", // Same as KXNOR
"MMX_PADDS(B|W)irr",
"MMX_PADDUS(B|W)irr",
"MMX_PAVG(B|W)irr",