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Pass the computed iteration count value to RewriteLoopExitValues

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instead of having it call getIterationCount again.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54380 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-08-05 22:34:21 +00:00
parent 837f39b839
commit 5a6c448a7e
1 changed files with 4 additions and 4 deletions
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8
lib/Transforms/Scalar/IndVarSimplify.cpp
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@ -90,7 +90,7 @@ namespace {
std::set<Instruction*> &DeadInsts);
Instruction *LinearFunctionTestReplace(Loop *L, SCEV *IterationCount,
SCEVExpander &RW);
void RewriteLoopExitValues(Loop *L);
void RewriteLoopExitValues(Loop *L, SCEV *IterationCount);
void DeleteTriviallyDeadInstructions(std::set<Instruction*> &Insts);
};
@ -303,7 +303,7 @@ Instruction *IndVarSimplify::LinearFunctionTestReplace(Loop *L,
/// final value of any expressions that are recurrent in the loop, and
/// substitute the exit values from the loop into any instructions outside of
/// the loop that use the final values of the current expressions.
void IndVarSimplify::RewriteLoopExitValues(Loop *L) {
void IndVarSimplify::RewriteLoopExitValues(Loop *L, SCEV *IterationCount) {
BasicBlock *Preheader = L->getLoopPreheader();
// Scan all of the instructions in the loop, looking at those that have
@ -321,7 +321,7 @@ void IndVarSimplify::RewriteLoopExitValues(Loop *L) {
BlockToInsertInto = Preheader;
BasicBlock::iterator InsertPt = BlockToInsertInto->getFirstNonPHI();
bool HasConstantItCount = isa<SCEVConstant>(SE->getIterationCount(L));
bool HasConstantItCount = isa<SCEVConstant>(IterationCount);
std::set<Instruction*> InstructionsToDelete;
std::map<Instruction*, Value*> ExitValues;
@ -458,7 +458,7 @@ bool IndVarSimplify::runOnLoop(Loop *L, LPPassManager &LPM) {
//
SCEVHandle IterationCount = SE->getIterationCount(L);
if (!isa<SCEVCouldNotCompute>(IterationCount))
RewriteLoopExitValues(L);
RewriteLoopExitValues(L, IterationCount);
// Next, analyze all of the induction variables in the loop, canonicalizing
// auxillary induction variables.