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[LIR] Make the LoopIdiomRecognize pass get analyses essentially the same

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way as every other pass. This simplifies the code quite a bit and is
also more idiomatic! <ba-dum!>

llvm-svn: 244853
This commit is contained in:
Chandler Carruth 2015-08-13 01:03:26 +00:00
parent 3d8b7669f2
commit adb2df90fa
1 changed files with 6 additions and 40 deletions
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46
lib/Transforms/Scalar/LoopIdiomRecognize.cpp
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@ -78,10 +78,6 @@ public:
static char ID;
explicit LoopIdiomRecognize() : LoopPass(ID) {
initializeLoopIdiomRecognizePass(*PassRegistry::getPassRegistry());
DT = nullptr;
SE = nullptr;
TLI = nullptr;
TTI = nullptr;
}
bool runOnLoop(Loop *L, LPPassManager &LPM) override;
@ -106,30 +102,6 @@ public:
AU.addRequired<TargetTransformInfoWrapperPass>();
}
DominatorTree *getDominatorTree() {
return DT ? DT
: (DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree());
}
ScalarEvolution *getScalarEvolution() {
return SE ? SE : (SE = &getAnalysis<ScalarEvolution>());
}
TargetLibraryInfo *getTargetLibraryInfo() {
if (!TLI)
TLI = &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
return TLI;
}
const TargetTransformInfo *getTargetTransformInfo() {
return TTI ? TTI
: (TTI = &getAnalysis<TargetTransformInfoWrapperPass>().getTTI(
*CurLoop->getHeader()->getParent()));
}
Loop *getLoop() const { return CurLoop; }
private:
/// \name Countable Loop Idiom Handling
/// @{
@ -205,7 +177,6 @@ bool LoopIdiomRecognize::runOnLoop(Loop *L, LPPassManager &LPM) {
return false;
CurLoop = L;
// If the loop could not be converted to canonical form, it must have an
// indirectbr in it, just give up.
if (!L->getLoopPreheader())
@ -216,9 +187,15 @@ bool LoopIdiomRecognize::runOnLoop(Loop *L, LPPassManager &LPM) {
if (Name == "memset" || Name == "memcpy")
return false;
DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
SE = &getAnalysis<ScalarEvolution>();
TLI = &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
TTI = &getAnalysis<TargetTransformInfoWrapperPass>().getTTI(
*CurLoop->getHeader()->getParent());
if (SE->hasLoopInvariantBackedgeTakenCount(L))
return runOnCountableLoop();
return runOnNoncountableLoop();
}
@ -234,14 +211,7 @@ bool LoopIdiomRecognize::runOnCountableLoop() {
if (BECst->getValue()->getValue() == 0)
return false;
// set DT
(void)getDominatorTree();
LoopInfo &LI = getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
TLI = &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
// set TLI
(void)getTargetLibraryInfo();
SmallVector<BasicBlock *, 8> ExitBlocks;
CurLoop->getUniqueExitBlocks(ExitBlocks);
@ -852,10 +822,6 @@ static bool detectPopcountIdiom(Loop *CurLoop, BasicBlock *PreCondBB,
/// If detected, transforms the relevant code to issue the popcount intrinsic
/// function call, and returns true; otherwise, returns false.
bool LoopIdiomRecognize::recognizePopcount() {
(void)getScalarEvolution();
(void)getTargetLibraryInfo();
(void)getTargetTransformInfo();
if (TTI->getPopcntSupport(32) != TargetTransformInfo::PSK_FastHardware)
return false;