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Teach regular and fast isel to set dead flags on unused implicit defs

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on calls and similar instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106353 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-06-18 23:28:01 +00:00
parent 8af5ed9e15
commit db4971259c
7 changed files with 69 additions and 0 deletions
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9
include/llvm/CodeGen/SelectionDAGNodes.h
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@ -549,6 +549,15 @@ public:
return FoundNode;
}
/// getFlaggedUser - If this node has a flag value with a user, return
/// the user (there is at most one). Otherwise return NULL.
SDNode *getFlaggedUser() const {
for (use_iterator UI = use_begin(), UE = use_end(); UI != UE; ++UI)
if (UI.getUse().get().getValueType() == MVT::Flag)
return *UI;
return 0;
}
/// getNumValues - Return the number of values defined/returned by this
/// operator.
///