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| author | Devang Patel <dpatel@apple.com> | 2010-06-01 19:59:01 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2010-06-01 19:59:01 +0000 |
| commit | 9126c0d42a5176e5865171713fae4a62e3c69912 (patch) | |
| tree | 9da99b7d21b5e406a3dcb5a32e06e3d806996edd /lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | |
| parent | 956b3490349019163d1d12bb42b82f7e1fcc20ee (diff) | |
Keep track of incoming debug value of unused argument.
Radar 7927666.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105285 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 9f8f0c4dd7..833173f244 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -698,6 +698,7 @@ void SelectionDAGBuilder::init(GCFunctionInfo *gfi, AliasAnalysis &aa) { /// consumed. void SelectionDAGBuilder::clear() { NodeMap.clear(); + UnusedArgNodeMap.clear(); PendingLoads.clear(); PendingExports.clear(); CurDebugLoc = DebugLoc(); @@ -4063,7 +4064,10 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) { } else { bool createUndef = false; // FIXME : Why not use getValue() directly ? - SDValue &N = NodeMap[V]; + SDValue N = NodeMap[V]; + if (!N.getNode() && isa<Argument>(V)) + // Check unused arguments map. + N = UnusedArgNodeMap[V]; if (N.getNode()) { if (!EmitFuncArgumentDbgValue(DI, V, Variable, Offset, N)) { SDV = DAG.getDbgValue(Variable, N.getNode(), @@ -6032,6 +6036,12 @@ void SelectionDAGISel::LowerArguments(const BasicBlock *LLVMBB) { SmallVector<EVT, 4> ValueVTs; ComputeValueVTs(TLI, I->getType(), ValueVTs); unsigned NumValues = ValueVTs.size(); + + // If this argument is unused then remember its value. It is used to generate + // debugging information. + if (I->use_empty() && NumValues) + SDB->setUnusedArgValue(I, InVals[i]); + for (unsigned Value = 0; Value != NumValues; ++Value) { EVT VT = ValueVTs[Value]; EVT PartVT = TLI.getRegisterType(*CurDAG->getContext(), VT); |