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| author | Chris Lattner <sabre@nondot.org> | 2005-01-28 22:52:50 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-01-28 22:52:50 +0000 |
| commit | e76ad6de40b5e4c0399257b0438914c8c85ceaa1 (patch) | |
| tree | c3597276463cabfe8f50819fbd54e44ac0603bab /lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | |
| parent | e560521f1af300a10717ca5c73d42df9ffb1b121 (diff) | |
implement legalization of truncates whose results and sources need to be
truncated, e.g. (truncate:i8 something:i16) on a 32 or 64-bit RISC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19879 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 32cf597072..e435bd609d 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -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: |