[X86] Fix typo from r310794. Index = 0 should have been Index == 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310801 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 04ee7121c7e7007a57585c2c6446f2a2587b0ee7..bed9ff58468c4e28ab2522074abf364d48058f58 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -4582,8 +4582,8 @@ bool X86TargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT,
   // Mask vectors support all subregister combinations and operations that
   // extract half of vector.
   if (ResVT.getVectorElementType() == MVT::i1)
-    return Index = 0 || ((ResVT.getSizeInBits() == SrcVT.getSizeInBits() * 2) &&
-                         (Index == ResVT.getVectorNumElements()));
+    return Index == 0 || ((ResVT.getSizeInBits() == SrcVT.getSizeInBits()*2) &&
+                          (Index == ResVT.getVectorNumElements()));
 
   return (Index % ResVT.getVectorNumElements()) == 0;
 }