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Convert BasicVN to be an ImmutablePass

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llvm-svn: 3924
This commit is contained in:
Chris Lattner 2002-09-25 22:27:25 +00:00
parent 37ae98efd1
commit 04af33fe09
1 changed files with 1 additions and 12 deletions
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13
lib/Analysis/ValueNumbering.cpp
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@ -38,18 +38,7 @@ namespace {
/// lexically identical expressions. This does not require any ahead of time
/// analysis, so it is a very fast default implementation.
///
struct BasicVN : public FunctionPass, public ValueNumbering {
/// Pass Implementation stuff. This isn't much of a pass.
///
bool runOnFunction(Function &) { return false; }
/// getAnalysisUsage - Does not modify anything.
///
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
struct BasicVN : public ImmutablePass, public ValueNumbering {
/// getEqualNumberNodes - Return nodes with the same value number as the
/// specified Value. This fills in the argument vector with any equal
/// values.