Do not use the type of the RHS constant to determine the type of the operation.

This fails for shifts because the constant is always 8 bits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19508 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index 35796e9e60f50c2ff08e5c96a9e9d2e4e1526098..a796045c5b50466a289b7f76b4eb2cdadaaf6f37 100644 (file)
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -2271,7 +2271,7 @@ void ISel::Select(SDOperand N) {
             SDOperand Op0 = Op.getOperand(0);
             SDOperand Op1 = Op.getOperand(1);
             if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Op1)) {
-              switch (CN->getValueType(0)) {
+              switch (Op0.getValueType()) { // Use Op0's type because of shifts.
               default: break;
               case MVT::i1:
               case MVT::i8:  Opc = TabPtr[0]; break;