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- Use getExitingBlock instead of getExitingBlocks.

Browse Source 
- Remove trailing spaces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146854 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakub Staszak 2011-12-18 21:52:30 +00:00
parent 0581ed792b
commit 53ce428646
1 changed files with 11 additions and 13 deletions
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24
lib/Transforms/Utils/LoopUnrollRuntime.cpp
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@ -11,11 +11,11 @@
// trip counts. See LoopUnroll.cpp for unrolling loops with compile-time
// trip counts.
//
// The functions in this file are used to generate extra code when the
// The functions in this file are used to generate extra code when the
// run-time trip count modulo the unroll factor is not 0. When this is the
// case, we need to generate code to execute these 'left over' iterations.
//
// The current strategy generates an if-then-else sequence prior to the
// The current strategy generates an if-then-else sequence prior to the
// unrolled loop to execute the 'left over' iterations. Other strategies
// include generate a loop before or after the unrolled loop.
//
@ -37,7 +37,7 @@
using namespace llvm;
STATISTIC(NumRuntimeUnrolled,
STATISTIC(NumRuntimeUnrolled,
"Number of loops unrolled with run-time trip counts");
/// Connect the unrolling prolog code to the original loop.
@ -81,8 +81,8 @@ static void ConnectProlog(Loop *L, Value *TripCount, unsigned Count,
} else {
NewPN->addIncoming(Constant::getNullValue(PN->getType()), OrigPH);
}
Value *OrigVal = PN->getIncomingValueForBlock(Latch);
Value *V = OrigVal;
Value *V = PN->getIncomingValueForBlock(Latch);
if (Instruction *I = dyn_cast<Instruction>(V)) {
if (L->contains(I)) {
V = LVMap[I];
@ -207,7 +207,7 @@ static void CloneLoopBlocks(Loop *L,
/// to the unroll factor as the number of *extra* copies added).
/// We assume also that the loop unroll factor is a power-of-two. So, after
/// unrolling the loop, the number of loop bodies executed is 2,
/// 4, 8, etc. Note - LLVM converts the if-then-sequence to a switch
/// 4, 8, etc. Note - LLVM converts the if-then-sequence to a switch
/// instruction in SimplifyCFG.cpp. Then, the backend decides how code for
/// the switch instruction is generated.
///
@ -227,9 +227,7 @@ static void CloneLoopBlocks(Loop *L,
bool llvm::UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
LPPassManager *LPM) {
// for now, only unroll loops that contain a single exit
SmallVector<BasicBlock*, 4> ExitingBlocks;
L->getExitingBlocks(ExitingBlocks);
if (ExitingBlocks.size() > 1)
if (!L->getExitingBlock())
return false;
// Make sure the loop is in canonical form, and there is a single
@ -250,7 +248,7 @@ bool llvm::UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
return false;
// Add 1 since the backedge count doesn't include the first loop iteration
const SCEV *TripCountSC =
const SCEV *TripCountSC =
SE->getAddExpr(BECount, SE->getConstant(BECount->getType(), 1));
if (isa<SCEVCouldNotCompute>(TripCountSC))
return false;
@ -293,8 +291,8 @@ bool llvm::UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
// Branch to either the extra iterations or the unrolled loop
// We will fix up the true branch label when adding loop body copies
BranchInst::Create(PEnd, PEnd, BranchVal, PreHeaderBR);
assert(PreHeaderBR->isUnconditional() &&
PreHeaderBR->getSuccessor(0) == PEnd &&
assert(PreHeaderBR->isUnconditional() &&
PreHeaderBR->getSuccessor(0) == PEnd &&
"CFG edges in Preheader are not correct");
PreHeaderBR->eraseFromParent();
@ -359,7 +357,7 @@ bool llvm::UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
for (unsigned i = 0, e = NewBlocks.size(); i != e; ++i) {
for (BasicBlock::iterator I = NewBlocks[i]->begin(),
E = NewBlocks[i]->end(); I != E; ++I) {
RemapInstruction(I, VMap,
RemapInstruction(I, VMap,
RF_NoModuleLevelChanges|RF_IgnoreMissingEntries);
}
}