Use APInt::isAllOnesValue instead of popcnt. NFCI.
More obvious implementation and faster too.
llvm-svn: 284937
diff --git a/llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp b/llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp
index 2949816..1111552 100644
--- a/llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp
+++ b/llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp
@@ -82,7 +82,7 @@
// Only treat the element as UNDEF if all bits are UNDEF, otherwise
// treat it as zero.
- if (EltUndef.countPopulation() == MaskEltSizeInBits) {
+ if (EltUndef.isAllOnesValue()) {
UndefElts[i] = true;
RawMask[i] = 0;
continue;