Hook up support for fast-isel of trunc instructions, using the newly working support for EXTRACT_SUBREG.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55482 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 4dbfadc..9fa37b1 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -366,6 +366,9 @@
case Instruction::SExt:
if (!SelectCast(I, ISD::SIGN_EXTEND, ValueMap)) return I;
break;
+ case Instruction::Trunc:
+ if (!SelectCast(I, ISD::TRUNCATE, ValueMap)) return I;
+ break;
case Instruction::SIToFP:
if (!SelectCast(I, ISD::SINT_TO_FP, ValueMap)) return I;
break;
@@ -594,6 +597,6 @@
unsigned ResultReg = createResultReg(SRC);
const TargetInstrDesc &II = TII.get(TargetInstrInfo::EXTRACT_SUBREG);
- BuildMI(MBB, II, ResultReg).addReg(Op0);
+ BuildMI(MBB, II, ResultReg).addReg(Op0).addImm(Idx);
return ResultReg;
}