6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-11 16:37:42 +00:00
Code Issues Projects Releases Wiki Activity

[LoopVectorizer] Remove redundant variables PastOverflowCheck and OverflowCheckAnchor. NFCI.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241740 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Zolotukhin 2015-07-08 21:47:56 +00:00
parent ca6e363f1d
commit f26da26d05
1 changed files with 2 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/Transforms/Vectorize/LoopVectorize.cpp
View File

@ -2564,14 +2564,6 @@ void InnerLoopVectorizer::createEmptyLoop() {
IdxTy):
ConstantInt::get(IdxTy, 0);
// We need an instruction to anchor the overflow check on. StartIdx needs to
// be defined before the overflow check branch. Because the scalar preheader
// is going to merge the start index and so the overflow branch block needs to
// contain a definition of the start index.
Instruction *OverflowCheckAnchor = BinaryOperator::CreateAdd(
StartIdx, ConstantInt::get(IdxTy, 0), "overflow.check.anchor",
BypassBlock->getTerminator());
// Count holds the overall loop count (N).
Value *Count = Exp.expandCodeFor(ExitCount, ExitCount->getType(),
BypassBlock->getTerminator());
@ -2617,9 +2609,8 @@ void InnerLoopVectorizer::createEmptyLoop() {
// Generate code to check that the loop's trip count that we computed by
// adding one to the backedge-taken count will not overflow.
auto PastOverflowCheck = std::next(BasicBlock::iterator(OverflowCheckAnchor));
BasicBlock *CheckBlock =
BypassBlock->splitBasicBlock(PastOverflowCheck, "overflow.checked");
BasicBlock *CheckBlock = BypassBlock->splitBasicBlock(
BypassBlock->getTerminator(), "overflow.checked");
if (ParentLoop)
ParentLoop->addBasicBlockToLoop(CheckBlock, *LI);
LoopBypassBlocks.push_back(CheckBlock);