From 96ef0c1103607e973532e166dae8311f5abb139e Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sun, 23 Oct 2016 15:09:44 +0000
Subject: [PATCH] Use APInt::isAllOnesValue instead of popcnt. NFCI.

More obvious implementation and faster too.

llvm-svn: 284937
---
 llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 @@ static bool extractConstantMask(const Constant *C, unsigned MaskEltSizeInBits,
 
     // 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;
-- 
2.7.4