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Factor some code from the DomTree and PostDomTree calculate methods up into

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each one's runOnFunction method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42563 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2007-10-03 03:20:17 +00:00
parent 7687bd0b2b
commit 471ab54df7
5 changed files with 30 additions and 25 deletions
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23
lib/Analysis/PostDominators.cpp
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@@ -28,6 +28,29 @@ char PostDominanceFrontier::ID = 0;
static RegisterPass<PostDominatorTree>
F("postdomtree", "Post-Dominator Tree Construction", true);
bool PostDominatorTree::runOnFunction(Function &F) {
reset(); // Reset from the last time we were run...
// Initialize the roots list
for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
TerminatorInst *Insn = I->getTerminator();
if (Insn->getNumSuccessors() == 0) {
// Unreachable block is not a root node.
if (!isa<UnreachableInst>(Insn))
Roots.push_back(I);
}
// Prepopulate maps so that we don't get iterator invalidation issues later.
IDoms[I] = 0;
DomTreeNodes[I] = 0;
}
Vertex.push_back(0);
PDTcalculate(*this, F);
return false;
}
//===----------------------------------------------------------------------===//
// PostDominanceFrontier Implementation
//===----------------------------------------------------------------------===//