From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sat, 11 Feb 2017 18:06:24 +0000 (+0000)
Subject: [X86][SSE] Add early-out when trying to match blend shuffle. NFCI.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=276a1497f1afa92cd8ac76f7b54c5cdf47662b0d;p=llvm

[X86][SSE] Add early-out when trying to match blend shuffle. NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294864 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 122b2db0398..f43567573eb 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -26684,10 +26684,11 @@ static bool matchBinaryPermuteVectorShuffle(MVT MaskVT, ArrayRef<int> Mask,
         int M = Mask[i];
         if (M == SM_SentinelUndef)
           continue;
-        else if (M == SM_SentinelZero)
-          MatchBlend = false;
-        else if ((M != i) && (M != (i + (int)NumMaskElts)))
+        if ((M == SM_SentinelZero) ||
+            ((M != i) && (M != (i + (int)NumMaskElts)))) {
           MatchBlend = false;
+          break;
+        }
       }
 
       if (MatchBlend) {