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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/Scalar/JumpThreading.cpp
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@ -188,7 +188,7 @@ bool JumpThreading::runOnFunction(Function &F) {
// If the block is trivially dead, zap it. This eliminates the successor
// edges which simplifies the CFG.
if (pred_begin(BB) == pred_end(BB) &&
if (pred_empty(BB) &&
BB != &BB->getParent()->getEntryBlock()) {
DEBUG(dbgs() << " JT: Deleting dead block '" << BB->getName()
<< "' with terminator: " << *BB->getTerminator() << '\n');
@ -662,7 +662,7 @@ static bool hasAddressTakenAndUsed(BasicBlock *BB) {
bool JumpThreading::ProcessBlock(BasicBlock *BB) {
// If the block is trivially dead, just return and let the caller nuke it.
// This simplifies other transformations.
if (pred_begin(BB) == pred_end(BB) &&
if (pred_empty(BB) &&
BB != &BB->getParent()->getEntryBlock())
return false;