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[SDAG] Add an assert that we don't mess up the number of values when

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replacing nodes in the legalizer.

This caught a number of bugs for me during development.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214022 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2014-07-26 05:53:16 +00:00
parent 722419ef52
commit f1ce818bef
1 changed files with 3 additions and 0 deletions

3
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

@ -180,6 +180,9 @@ public:
}
}
void ReplaceNode(SDNode *Old, SDNode *New) {
assert(Old->getNumValues() == New->getNumValues() &&
"Replacing one node with another that produces a different number "
"of values!");
DAG.ReplaceAllUsesWith(Old, New);
for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
DAG.TransferDbgValues(SDValue(Old, i), SDValue(New, i));