Revert r216066, "Optimize ZERO_EXTEND and SIGN_EXTEND in both SelectionDAG Builder...

[oota-llvm.git] / lib / CodeGen / SelectionDAG / LegalizeIntegerTypes.cpp

diff --git a/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
index 23d88e55dc4ef25caa93100ab2169baa08ad2924..0b7a3cbaa9fe0b8253a07365646435a3f02a0e26 100644 (file)
--- a/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
@@ -861,28 +861,7 @@ void DAGTypeLegalizer::PromoteSetCCOperands(SDValue &NewLHS,SDValue &NewRHS,
   switch (CCCode) {
   default: llvm_unreachable("Unknown integer comparison!");
   case ISD::SETEQ:
-  case ISD::SETNE: {
-    SDValue OpL, OpR;
-
-    OpL = GetPromotedInteger(NewLHS);
-    OpR = GetPromotedInteger(NewRHS);
-
-    // We would prefer to promote the comparison operand with sign extension,
-    // if we find the operand is actually to truncate an AssertSext. With this
-    // optimization, we can avoid inserting real truncate instruction, which
-    // is redudant eventually.
-    if (OpL->getOpcode() == ISD::AssertSext &&
-        cast<VTSDNode>(OpL->getOperand(1))->getVT() == NewLHS.getValueType() &&
-        OpR->getOpcode() == ISD::AssertSext &&
-        cast<VTSDNode>(OpR->getOperand(1))->getVT() == NewRHS.getValueType()) {
-      NewLHS = OpL;
-      NewRHS = OpR;
-    } else {
-      NewLHS = ZExtPromotedInteger(NewLHS);
-      NewRHS = ZExtPromotedInteger(NewRHS);
-    }
-    break;
-  }
+  case ISD::SETNE:
   case ISD::SETUGE:
   case ISD::SETUGT:
   case ISD::SETULE: