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Standardize {pred,succ,use,user}_empty()

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The functions {pred,succ,use,user}_{begin,end} exist, but many users
have to check *_begin() with *_end() by hand to determine if the
BasicBlock or User is empty. Fix this with a standard *_empty(),
demonstrating a few usecases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225760 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ramkumar Ramachandra
2015-01-13 03:46:47 +00:00
parent 3423a7b24f
commit 2bcc808cf9
8 changed files with 18 additions and 10 deletions
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4
lib/Transforms/IPO/PruneEH.cpp
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@ -200,7 +200,7 @@ bool PruneEH::SimplifyFunction(Function *F) {
BB->getInstList().pop_back();
// If the unwind block is now dead, nuke it.
if (pred_begin(UnwindBlock) == pred_end(UnwindBlock))
if (pred_empty(UnwindBlock))
DeleteBasicBlock(UnwindBlock); // Delete the new BB.
++NumRemoved;
@ -234,7 +234,7 @@ bool PruneEH::SimplifyFunction(Function *F) {
/// updating the callgraph to reflect any now-obsolete edges due to calls that
/// exist in the BB.
void PruneEH::DeleteBasicBlock(BasicBlock *BB) {
assert(pred_begin(BB) == pred_end(BB) && "BB is not dead!");
assert(pred_empty(BB) && "BB is not dead!");
CallGraph &CG = getAnalysis<CallGraphWrapperPass>().getCallGraph();
CallGraphNode *CGN = CG[BB->getParent()];