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| author | Adrian Prantl <aprantl@apple.com> | 2017-11-09 19:50:20 +0000 |
|---|---|---|
| committer | Adrian Prantl <aprantl@apple.com> | 2017-11-09 19:50:20 +0000 |
| commit | 1c8c544946a21ee46261dee56ffc1fbea1515209 (patch) | |
| tree | cf4c6fdfa363bba9b6aae07321c848c7b325e25f /llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | |
| parent | 18f21a483b863439ed19cdddb966dd9fe0464dcf (diff) | |
| download | bcm5719-llvm-1c8c544946a21ee46261dee56ffc1fbea1515209.tar.gz bcm5719-llvm-1c8c544946a21ee46261dee56ffc1fbea1515209.zip | |
Preserve debug info when DAG-combinging (zext (truncate x)) -> (and x, mask).
rdar://problem/27139077
llvm-svn: 317825
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 86c4f2c3565..557cf6d5212 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -7613,7 +7613,11 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) { if (!LegalOperations || TLI.isOperationLegal(ISD::AND, VT)) { SDValue Op = DAG.getAnyExtOrTrunc(N0.getOperand(0), SDLoc(N), VT); AddToWorklist(Op.getNode()); - return DAG.getZeroExtendInReg(Op, SDLoc(N), MinVT.getScalarType()); + SDValue And = DAG.getZeroExtendInReg(Op, SDLoc(N), MinVT.getScalarType()); + // We may safely transfer the debug info describing the truncate node over + // to the equivalent and operation. + DAG.transferDbgValues(N0, And); + return And; } } |
