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implement legalization of truncates whose results and sources need to be

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truncated, e.g. (truncate:i8 something:i16) on a 32 or 64-bit RISC.

llvm-svn: 19879
This commit is contained in:
Chris Lattner 2005-01-28 22:52:50 +00:00
parent 89cac82479
commit da7b5277c1
1 changed files with 5 additions and 2 deletions
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7
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1035,10 +1035,13 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
if (Result.getValueType() > NVT) // Truncate to NVT instead of VT
Result = DAG.getNode(ISD::TRUNCATE, NVT, Result);
break;
case Promote:
// The truncation is not required, because we don't guarantee anything
// about high bits anyway.
Result = PromoteOp(Node->getOperand(0));
break;
case Expand:
assert(0 && "Cannot handle expand yet");
case Promote:
assert(0 && "Cannot handle promote-promote yet");
}
break;
case ISD::SIGN_EXTEND: