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| author | Devang Patel <dpatel@apple.com> | 2010-09-02 21:29:42 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2010-09-02 21:29:42 +0000 |
| commit | 3f74a116c80b483ffc7c2e6922ff62f0f73d83f5 (patch) | |
| tree | 674cb1e6436011f3097408ef1879c4bf1bdd7b01 /lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | |
| parent | 24bde5bce192119ee0fc4f94ef8757fd4031e5f6 (diff) | |
Detect undef value early and save unnecessary NodeMap query.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112864 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 08d2e9337b..e65744592c 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -4074,6 +4074,17 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) { // absolute, but not relative, values are different depending on whether // debug info exists. ++SDNodeOrder; + + // Check if address has undef value. + if (isa<UndefValue>(Address) || + (Address->use_empty() && !isa<Argument>(Address))) { + SDDbgValue*SDV = + DAG.getDbgValue(Variable, UndefValue::get(Address->getType()), + 0, dl, SDNodeOrder); + DAG.AddDbgValue(SDV, 0, false); + return 0; + } + SDValue &N = NodeMap[Address]; if (!N.getNode() && isa<Argument>(Address)) // Check unused arguments map. |