try to do better match for i32 adds
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20143 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index 49e9b54..30386d8 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -920,13 +920,34 @@
cast<ConstantSDNode>(N.getOperand(0).getOperand(1))->getValue() <= 255)
{ //Normal imm add/sub
Opc = isAdd ? Alpha::ADDLi : (isMul ? Alpha::MULLi : Alpha::SUBLi);
- Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
+ //if the value was really originally a i32, skip the up conversion
+ if (N.getOperand(0).getOperand(0).getOpcode() == ISD::SIGN_EXTEND_INREG &&
+ dyn_cast<MVTSDNode>(N.getOperand(0).getOperand(0).Val)
+ ->getExtraValueType() == MVT::i32)
+ Tmp1 = SelectExpr(N.getOperand(0).getOperand(0).getOperand(0));
+ else
+ Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
Tmp2 = cast<ConstantSDNode>(N.getOperand(0).getOperand(1))->getValue();
BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(Tmp2);
}
else
{ //Normal add/sub
Opc = isAdd ? Alpha::ADDL : (isMul ? Alpha::MULLi : Alpha::SUBL);
+ //if the value was really originally a i32, skip the up conversion
+ if (N.getOperand(0).getOperand(0).getOpcode() == ISD::SIGN_EXTEND_INREG &&
+ dyn_cast<MVTSDNode>(N.getOperand(0).getOperand(0).Val)
+ ->getExtraValueType() == MVT::i32)
+ Tmp1 = SelectExpr(N.getOperand(0).getOperand(0).getOperand(0));
+ else
+ Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
+ //if the value was really originally a i32, skip the up conversion
+ if (N.getOperand(0).getOperand(1).getOpcode() == ISD::SIGN_EXTEND_INREG &&
+ dyn_cast<MVTSDNode>(N.getOperand(0).getOperand(1).Val)
+ ->getExtraValueType() == MVT::i32)
+ Tmp2 = SelectExpr(N.getOperand(0).getOperand(1).getOperand(0));
+ else
+ Tmp2 = SelectExpr(N.getOperand(0).getOperand(1));
+
Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
Tmp2 = SelectExpr(N.getOperand(0).getOperand(1));
BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);