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Fix typos and whitespaces. Other cosmetic changes based on feedback.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55424 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2008-08-27 17:50:18 +00:00
parent 505569dc9c
commit 541532724e
1 changed files with 9 additions and 12 deletions
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21
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -44,8 +44,8 @@ using namespace llvm;
STATISTIC(NumReduced , "Number of GEPs strength reduced");
STATISTIC(NumInserted, "Number of PHIs inserted");
STATISTIC(NumVariable, "Number of PHIs with variable strides");
STATISTIC(NumEliminated , "Number of strides eliminated");
STATISTIC(NumShadow , "Number of Shadow IVs optimized");
STATISTIC(NumEliminated, "Number of strides eliminated");
STATISTIC(NumShadow, "Number of Shadow IVs optimized");
namespace {
@ -1715,30 +1715,27 @@ void LoopStrengthReduce::OptimizeShadowIV(Loop *L) {
for (std::vector<IVStrideUse>::iterator UI = SI->second.Users.begin(),
E = SI->second.Users.end(); UI != E; /* empty */) {
std::vector<IVStrideUse>::iterator CandidateUI = UI;
UI++;
++UI;
Instruction *ShadowUse = CandidateUI->User;
const Type *DestTy = NULL;
/* If shadow use is a int->float cast then insert a second IV
to elminate this cast.
to eliminate this cast.
for (unsigned i = 0; i < n; ++i)
foo((double)i);
is trnasformed into
is transformed into
double d = 0.0;
for (unsigned i = 0; i < n; ++i, ++d)
foo(d);
*/
UIToFPInst *UCast = dyn_cast<UIToFPInst>(CandidateUI->User);
if (UCast)
if (UIToFPInst *UCast = dyn_cast<UIToFPInst>(CandidateUI->User))
DestTy = UCast->getDestTy();
else {
SIToFPInst *SCast = dyn_cast<SIToFPInst>(CandidateUI->User);
if (!SCast) continue;
else if (SIToFPInst *SCast = dyn_cast<SIToFPInst>(CandidateUI->User))
DestTy = SCast->getDestTy();
}
if (!DestTy) continue;
PHINode *PH = dyn_cast<PHINode>(ShadowUse->getOperand(0));
if (!PH) continue;
@ -1784,7 +1781,7 @@ void LoopStrengthReduce::OptimizeShadowIV(Loop *L) {
/* Add new PHINode. */
PHINode *NewPH = PHINode::Create(DestTy, "IV.S.", PH);
/* create new icnrement. '++d' in above example. */
/* create new increment. '++d' in above example. */
ConstantFP *CFP = ConstantFP::get(DestTy, C->getZExtValue());
BinaryOperator *NewIncr =
BinaryOperator::Create(Incr->getOpcode(),