[llvm] 8206c50 - [X86] Add isAnyZero shuffle mask helper

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2020-03-29T19:51:37+01:00
New Revision: 8206c50cdec1551cf6e51da2bc492b8daaf80e1d

URL: https://github.com/llvm/llvm-project/commit/8206c50cdec1551cf6e51da2bc492b8daaf80e1d
DIFF: https://github.com/llvm/llvm-project/commit/8206c50cdec1551cf6e51da2bc492b8daaf80e1d.diff

LOG: [X86] Add isAnyZero shuffle mask helper

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86ISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index dff13183aab2..9735f8578409 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -5435,6 +5435,11 @@ static bool isAnyInRange(ArrayRef<int> Mask, int Low, int Hi) {
   return llvm::any_of(Mask, [Low, Hi](int M) { return isInRange(M, Low, Hi); });
 }
 
+/// Return true if the value of any element in Mask is the zero sentinel value.
+static bool isAnyZero(ArrayRef<int> Mask) {
+  return llvm::any_of(Mask, [](int M) { return M == SM_SentinelZero; });
+}
+
 /// Return true if Val is undef or if its value falls within the
 /// specified range (L, H].
 static bool isUndefOrInRange(int Val, int Low, int Hi) {
@@ -34231,8 +34236,7 @@ static SDValue combineX86ShuffleChain(ArrayRef<SDValue> Inputs, SDValue Root,
   int VariableShuffleDepth = Subtarget.hasFastVariableShuffle() ? 1 : 2;
   AllowVariableMask &= (Depth >= VariableShuffleDepth) || HasVariableMask;
 
-  bool MaskContainsZeros =
-      any_of(Mask, [](int M) { return M == SM_SentinelZero; });
+  bool MaskContainsZeros = isAnyZero(Mask);
 
   if (is128BitLaneCrossingShuffleMask(MaskVT, Mask)) {
     // If we have a single input lane-crossing shuffle then lower to VPERMV.