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Re-commit the safe parts of my 6/9 patch. Still working on fixing the unsafe parts.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28748 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2006-06-11 19:22:28 +00:00
parent b9b2b309d3
commit c2cc15cf9d
3 changed files with 21 additions and 0 deletions
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16
lib/Analysis/LoopInfo.cpp
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@@ -479,6 +479,22 @@ Value *Loop::getTripCount() const {
return 0;
}
/// isLCSSAForm - Return true if the Loop is in LCSSA form
bool Loop::isLCSSAForm() const {
for (Loop::block_iterator BB = block_begin(), E = block_end();
BB != E; ++BB) {
for (BasicBlock::iterator I = (*BB)->begin(), E = (*BB)->end(); I != E; ++I)
for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E;
++UI) {
BasicBlock *UserBB = cast<Instruction>(*UI)->getParent();
if (!isa<PHINode>(*UI) && !contains(UserBB)) {
return false;
}
}
}
return true;
}
//===-------------------------------------------------------------------===//
// APIs for updating loop information after changing the CFG