[x86] replace isEqualTo with == for efficiency

This is a follow-up suggested in D37534.
Patch by Yulia Koval.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315589 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index ca960d74d3d5135d4792a4a06ba3eab45e79ceda..499d072aa28bf05805c3144258ac59b726f3e396 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -35916,9 +35916,9 @@ static SDValue combineSubToSubus(SDNode *N, SelectionDAG &DAG,
     SubusRHS = Op1;
     SDValue MaxLHS = Op0.getOperand(0);
     SDValue MaxRHS = Op0.getOperand(1);
-    if (DAG.isEqualTo(MaxLHS, Op1))
+    if (MaxLHS == Op1)
       SubusLHS = MaxRHS;
-    else if (DAG.isEqualTo(MaxRHS, Op1))
+    else if (MaxRHS == Op1)
       SubusLHS = MaxLHS;
     else
       return SDValue();
@@ -35926,9 +35926,9 @@ static SDValue combineSubToSubus(SDNode *N, SelectionDAG &DAG,
     SubusLHS = Op0;
     SDValue MinLHS = Op1.getOperand(0);
     SDValue MinRHS = Op1.getOperand(1);
-    if (DAG.isEqualTo(MinLHS, Op0))
+    if (MinLHS == Op0)
       SubusRHS = MinRHS;
-    else if (DAG.isEqualTo(MinRHS, Op0))
+    else if (MinRHS == Op0)
       SubusRHS = MinLHS;
     else
       return SDValue();