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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-12-15 16:47:44 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-12-15 16:47:44 +0000 |
| commit | 388fc6a988b56a50efff57893a4df14b4d04e1cd (patch) | |
| tree | 1ef73286c3a9317acb791432b39bddb31b746c0e /lib/Target/X86/X86InstrFragmentsSIMD.td | |
| parent | d12de955856204db4cabdd9bcabc82c22d0e85f2 (diff) | |
| download | llvm-388fc6a988b56a50efff57893a4df14b4d04e1cd.tar.gz llvm-388fc6a988b56a50efff57893a4df14b4d04e1cd.tar.bz2 llvm-388fc6a988b56a50efff57893a4df14b4d04e1cd.tar.xz | |
X86: Add a couple of target-specific dag combines that turn VSELECTS into psubus if possible.
We match the pattern "x >= y ? x-y : 0" into "subus x, y" and two special cases
if y is a constant. DAGCombiner canonicalizes those so we first have to undo the
canonicalization for those cases. The pattern occurs in gzip when the loop
vectorizer is enabled. Part of PR14613.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170273 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86InstrFragmentsSIMD.td')
| -rw-r--r-- | lib/Target/X86/X86InstrFragmentsSIMD.td | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrFragmentsSIMD.td b/lib/Target/X86/X86InstrFragmentsSIMD.td index 09ab995166..7d16d2741d 100644 --- a/lib/Target/X86/X86InstrFragmentsSIMD.td +++ b/lib/Target/X86/X86InstrFragmentsSIMD.td @@ -128,6 +128,7 @@ def X86vsrai : SDNode<"X86ISD::VSRAI", SDTIntShiftOp>; def SDTX86CmpPTest : SDTypeProfile<1, 2, [SDTCisVT<0, i32>, SDTCisVec<1>, SDTCisSameAs<2, 1>]>; +def X86subus : SDNode<"X86ISD::SUBUS", SDTIntBinOp>; def X86ptest : SDNode<"X86ISD::PTEST", SDTX86CmpPTest>; def X86testp : SDNode<"X86ISD::TESTP", SDTX86CmpPTest>; |