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Cleanup implementation a bit

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llvm-svn: 2526
This commit is contained in:
Chris Lattner 2002-05-07 18:51:25 +00:00
parent e8330cc870
commit 6ccbd5804a
1 changed files with 6 additions and 4 deletions
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10
lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
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@ -1,7 +1,9 @@
//===- UnifyFunctionExitNodes.cpp - Make all functions have a single exit -===//
//
// This file provides several routines that are useful for simplifying CFGs in
// various ways...
// This pass is used to ensure that functions have at most one return
// instruction in them. Additionally, it keeps track of which node is the new
// exit node of the CFG. If there are no exit nodes in the CFG, the getExitNode
// method will return a null pointer.
//
//===----------------------------------------------------------------------===//
@ -22,7 +24,7 @@ AnalysisID UnifyFunctionExitNodes::ID(AnalysisID::create<UnifyFunctionExitNodes>
//
// If there are no return stmts in the Function, a null pointer is returned.
//
bool UnifyFunctionExitNodes::doit(Function *M, BasicBlock *&ExitNode) {
bool UnifyFunctionExitNodes::runOnFunction(Function *M) {
// Loop over all of the blocks in a function, tracking all of the blocks that
// return.
//
@ -33,7 +35,7 @@ bool UnifyFunctionExitNodes::doit(Function *M, BasicBlock *&ExitNode) {
if (ReturningBlocks.empty()) {
ExitNode = 0;
return false; // No blocks return
return false; // No blocks return
} else if (ReturningBlocks.size() == 1) {
ExitNode = ReturningBlocks.front(); // Already has a single return block
return false;