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Revert "[loop-idiom] Hoist loop memcpys to loop preheader"
This reverts commit 75d6b8bb4056d518d06b72e6411ce3749455e2e3. The reasoning is mentioned in https://reviews.llvm.org/D97667
This commit is contained in:
Tres Popp
parent
ea38d76270
commit
f893fcdd67
@ -205,13 +205,6 @@ private:
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enum class ForMemset { No, Yes };
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bool processLoopStores(SmallVectorImpl<StoreInst *> &SL, const SCEV *BECount,
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ForMemset For);
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template <typename MemInst>
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bool processLoopMemIntrinsic(
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BasicBlock *BB,
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bool (LoopIdiomRecognize::*Processor)(MemInst *, const SCEV *),
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const SCEV *BECount);
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bool processLoopMemCpy(MemCpyInst *MCI, const SCEV *BECount);
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bool processLoopMemSet(MemSetInst *MSI, const SCEV *BECount);
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bool processLoopStridedStore(Value *DestPtr, unsigned StoreSize,
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@ -642,10 +635,22 @@ bool LoopIdiomRecognize::runOnLoopBlock(
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for (auto &SI : StoreRefsForMemcpy)
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MadeChange |= processLoopStoreOfLoopLoad(SI, BECount);
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MadeChange |= processLoopMemIntrinsic<MemCpyInst>(
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BB, &LoopIdiomRecognize::processLoopMemCpy, BECount);
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MadeChange |= processLoopMemIntrinsic<MemSetInst>(
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BB, &LoopIdiomRecognize::processLoopMemSet, BECount);
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for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E;) {
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Instruction *Inst = &*I++;
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// Look for memset instructions, which may be optimized to a larger memset.
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if (MemSetInst *MSI = dyn_cast<MemSetInst>(Inst)) {
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WeakTrackingVH InstPtr(&*I);
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if (!processLoopMemSet(MSI, BECount))
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continue;
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MadeChange = true;
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// If processing the memset invalidated our iterator, start over from the
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// top of the block.
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if (!InstPtr)
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I = BB->begin();
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continue;
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}
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}
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return MadeChange;
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}
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@ -794,86 +799,6 @@ bool LoopIdiomRecognize::processLoopStores(SmallVectorImpl<StoreInst *> &SL,
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return Changed;
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}
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/// processLoopMemIntrinsic - Template function for calling different processor
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/// functions based on mem instrinsic type.
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template <typename MemInst>
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bool LoopIdiomRecognize::processLoopMemIntrinsic(
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BasicBlock *BB,
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bool (LoopIdiomRecognize::*Processor)(MemInst *, const SCEV *),
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const SCEV *BECount) {
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bool MadeChange = false;
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for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E;) {
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Instruction *Inst = &*I++;
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// Look for memory instructions, which may be optimized to a larger one.
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if (MemInst *MI = dyn_cast<MemInst>(Inst)) {
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WeakTrackingVH InstPtr(&*I);
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if (!(this->*Processor)(MI, BECount))
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continue;
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MadeChange = true;
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// If processing the instruction invalidated our iterator, start over from
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// the top of the block.
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if (!InstPtr)
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I = BB->begin();
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}
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}
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return MadeChange;
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}
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/// processLoopMemCpy - See if this memcpy can be promoted to a large memcpy
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bool LoopIdiomRecognize::processLoopMemCpy(MemCpyInst *MCI,
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const SCEV *BECount) {
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// We can only handle non-volatile memcpys with a constant size.
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if (MCI->isVolatile() || !isa<ConstantInt>(MCI->getLength()))
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return false;
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// If we're not allowed to hack on memcpy, we fail.
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if (!HasMemcpy || DisableLIRP::Memcpy)
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return false;
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Value *Dest = MCI->getDest();
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Value *Source = MCI->getSource();
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if (!Dest || !Source)
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return false;
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// See if the load and store pointer expressions are AddRec like {base,+,1} on
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// the current loop, which indicates a strided load and store. If we have
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// something else, it's a random load or store we can't handle.
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const SCEVAddRecExpr *StoreEv = dyn_cast<SCEVAddRecExpr>(SE->getSCEV(Dest));
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if (!StoreEv || StoreEv->getLoop() != CurLoop || !StoreEv->isAffine())
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return false;
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const SCEVAddRecExpr *LoadEv = dyn_cast<SCEVAddRecExpr>(SE->getSCEV(Source));
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if (!LoadEv || LoadEv->getLoop() != CurLoop || !LoadEv->isAffine())
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return false;
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// Reject memcpys that are so large that they overflow an unsigned.
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uint64_t SizeInBytes = cast<ConstantInt>(MCI->getLength())->getZExtValue();
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if ((SizeInBytes >> 32) != 0)
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return false;
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// Check if the stride matches the size of the memcpy. If so, then we know
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// that every byte is touched in the loop.
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const SCEVConstant *StrStride =
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dyn_cast<SCEVConstant>(StoreEv->getOperand(1));
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const SCEVConstant *LoadStride =
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dyn_cast<SCEVConstant>(LoadEv->getOperand(1));
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if (!StrStride || !LoadStride)
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return false;
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APInt StrIntStride = StrStride->getAPInt();
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APInt LoadIntStride = LoadStride->getAPInt();
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if (SizeInBytes != StrIntStride && SizeInBytes != -StrIntStride)
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return false;
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// Check if the load stride matches the store stride.
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if (StrIntStride != LoadIntStride && StrIntStride != -LoadIntStride)
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return false;
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return processLoopStoreOfLoopLoad(Dest, Source, (unsigned)SizeInBytes,
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MCI->getDestAlign(), MCI->getSourceAlign(),
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MCI, MCI, StoreEv, LoadEv, BECount);
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}
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/// processLoopMemSet - See if this memset can be promoted to a large memset.
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bool LoopIdiomRecognize::processLoopMemSet(MemSetInst *MSI,
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const SCEV *BECount) {
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@ -882,7 +807,7 @@ bool LoopIdiomRecognize::processLoopMemSet(MemSetInst *MSI,
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return false;
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// If we're not allowed to hack on memset, we fail.
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if (!HasMemset || DisableLIRP::Memset)
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if (!HasMemset)
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return false;
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Value *Pointer = MSI->getDest();
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@ -1122,11 +1047,9 @@ bool LoopIdiomRecognize::processLoopStridedStore(
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ORE.emit([&]() {
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return OptimizationRemark(DEBUG_TYPE, "ProcessLoopStridedStore",
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NewCall->getDebugLoc(), Preheader)
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<< "Transformed loop-strided store in "
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<< ore::NV("Function", TheStore->getFunction())
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<< " function into a call to "
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<< "Transformed loop-strided store into a call to "
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<< ore::NV("NewFunction", NewCall->getCalledFunction())
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<< "() intrinsic";
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<< "() function";
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});
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// Okay, the memset has been formed. Zap the original store and anything that
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@ -1214,22 +1137,9 @@ bool LoopIdiomRecognize::processLoopStoreOfLoopLoad(
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SmallPtrSet<Instruction *, 1> Stores;
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Stores.insert(TheStore);
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bool IsMemCpy = isa<MemCpyInst>(TheStore);
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const StringRef InstRemark = IsMemCpy ? "memcpy" : "load and store";
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if (mayLoopAccessLocation(StoreBasePtr, ModRefInfo::ModRef, CurLoop, BECount,
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StoreSize, *AA, Stores)) {
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ORE.emit([&]() {
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return OptimizationRemarkMissed(DEBUG_TYPE, "LoopMayAccessStore",
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TheStore)
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<< ore::NV("Inst", InstRemark) << " in "
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<< ore::NV("Function", TheStore->getFunction())
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<< " function will not be hoisted: "
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<< ore::NV("Reason", "The loop may access store location");
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});
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StoreSize, *AA, Stores))
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return Changed;
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}
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const SCEV *LdStart = LoadEv->getStart();
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unsigned LdAS = SourcePtr->getType()->getPointerAddressSpace();
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@ -1243,21 +1153,9 @@ bool LoopIdiomRecognize::processLoopStoreOfLoopLoad(
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Value *LoadBasePtr = Expander.expandCodeFor(
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LdStart, Builder.getInt8PtrTy(LdAS), Preheader->getTerminator());
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// If the store is a memcpy instruction, we must check if it will write to
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// the load memory locations. So remove it from the ignored stores.
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if (IsMemCpy)
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Stores.erase(TheStore);
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if (mayLoopAccessLocation(LoadBasePtr, ModRefInfo::Mod, CurLoop, BECount,
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StoreSize, *AA, Stores)) {
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ORE.emit([&]() {
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return OptimizationRemarkMissed(DEBUG_TYPE, "LoopMayAccessLoad", TheLoad)
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<< ore::NV("Inst", InstRemark) << " in "
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<< ore::NV("Function", TheStore->getFunction())
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<< " function will not be hoisted: "
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<< ore::NV("Reason", "The loop may access load location");
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});
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StoreSize, *AA, Stores))
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return Changed;
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}
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if (avoidLIRForMultiBlockLoop())
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return Changed;
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@ -1318,9 +1216,7 @@ bool LoopIdiomRecognize::processLoopStoreOfLoopLoad(
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NewCall->getDebugLoc(), Preheader)
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<< "Formed a call to "
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<< ore::NV("NewFunction", NewCall->getCalledFunction())
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<< "() intrinsic from " << ore::NV("Inst", InstRemark)
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<< " instruction in " << ore::NV("Function", TheStore->getFunction())
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<< " function";
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<< "() function";
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});
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// Okay, the memcpy has been formed. Zap the original store and anything that
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@ -6,7 +6,7 @@ target triple = "x86_64-unknown-linux-gnu"
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; Check that everything still works when debuginfo is present, and that it is reasonably propagated.
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; CHECK: remark: <stdin>:6:1: Formed a call to llvm.memcpy.p0i8.p0i8.i64() intrinsic from load and store instruction in test6_dest_align function
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; CHECK: remark: <stdin>:6:1: Formed a call to llvm.memcpy.p0i8.p0i8.i64() function
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define void @test6_dest_align(i32* noalias align 1 %Base, i32* noalias align 4 %Dest, i64 %Size) nounwind ssp {
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; CHECK-LABEL: @test6_dest_align(
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@ -1,89 +0,0 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -loop-idiom < %s -S | FileCheck %s
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; #include <vector>
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;
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; class SDValue {
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; int A;
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; int B;
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; unsigned C;
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; };
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;
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; class SDUse {
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; SDValue Val;
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; SDUse **Prev = nullptr;
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; SDUse *Next = nullptr;
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;
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; public:
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; operator const SDValue&() const { return Val; }
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; };
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;
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; void foo(SDUse *S, int N) {
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; // Should not hoist memcpy because source and destination are of different types
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; std::vector<SDValue> Ops(S, S + N);
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; }
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; ModuleID = 'different_types.cpp'
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source_filename = "different_types.cpp"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%class.SDUse = type { %class.SDValue, %class.SDUse**, %class.SDUse* }
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%class.SDValue = type { i32, i32, i32 }
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declare dso_local i32 @__gxx_personality_v0(...)
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; Function Attrs: uwtable mustprogress
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define linkonce_odr dso_local %class.SDValue* @_ZNSt20__uninitialized_copyILb0EE13__uninit_copyIP5SDUseP7SDValueEET0_T_S7_S6_(%class.SDUse* %__first, %class.SDUse* %__last, %class.SDValue* %__result) local_unnamed_addr #0 align 2 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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; CHECK-LABEL: @_ZNSt20__uninitialized_copyILb0EE13__uninit_copyIP5SDUseP7SDValueEET0_T_S7_S6_(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP_NOT15:%.*]] = icmp eq %class.SDUse* [[__FIRST:%.*]], [[__LAST:%.*]]
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; CHECK-NEXT: br i1 [[CMP_NOT15]], label [[FOR_END:%.*]], label [[FOR_INC_PREHEADER:%.*]]
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; CHECK: for.inc.preheader:
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; CHECK-NEXT: br label [[FOR_INC:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[__CUR_017:%.*]] = phi %class.SDValue* [ [[INCDEC_PTR1:%.*]], [[FOR_INC]] ], [ [[__RESULT:%.*]], [[FOR_INC_PREHEADER]] ]
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; CHECK-NEXT: [[__FIRST_ADDR_016:%.*]] = phi %class.SDUse* [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ], [ [[__FIRST]], [[FOR_INC_PREHEADER]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast %class.SDValue* [[__CUR_017]] to i8*
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast %class.SDUse* [[__FIRST_ADDR_016]] to i8*
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; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(12) [[TMP0]], i8* noundef nonnull align 8 dereferenceable(12) [[TMP1]], i64 12, i1 false)
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; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds [[CLASS_SDUSE:%.*]], %class.SDUse* [[__FIRST_ADDR_016]], i64 1
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; CHECK-NEXT: [[INCDEC_PTR1]] = getelementptr inbounds [[CLASS_SDVALUE:%.*]], %class.SDValue* [[__CUR_017]], i64 1
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; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq %class.SDUse* [[INCDEC_PTR]], [[__LAST]]
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; CHECK-NEXT: br i1 [[CMP_NOT]], label [[FOR_END_LOOPEXIT:%.*]], label [[FOR_INC]]
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; CHECK: for.end.loopexit:
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; CHECK-NEXT: [[INCDEC_PTR1_LCSSA:%.*]] = phi %class.SDValue* [ [[INCDEC_PTR1]], [[FOR_INC]] ]
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; CHECK-NEXT: br label [[FOR_END]]
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; CHECK: for.end:
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; CHECK-NEXT: [[__CUR_0_LCSSA:%.*]] = phi %class.SDValue* [ [[__RESULT]], [[ENTRY:%.*]] ], [ [[INCDEC_PTR1_LCSSA]], [[FOR_END_LOOPEXIT]] ]
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; CHECK-NEXT: ret %class.SDValue* [[__CUR_0_LCSSA]]
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;
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entry:
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%cmp.not15 = icmp eq %class.SDUse* %__first, %__last
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br i1 %cmp.not15, label %for.end, label %for.inc.preheader
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for.inc.preheader: ; preds = %entry
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br label %for.inc
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for.inc: ; preds = %for.inc.preheader, %for.inc
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%__cur.017 = phi %class.SDValue* [ %incdec.ptr1, %for.inc ], [ %__result, %for.inc.preheader ]
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%__first.addr.016 = phi %class.SDUse* [ %incdec.ptr, %for.inc ], [ %__first, %for.inc.preheader ]
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%0 = bitcast %class.SDValue* %__cur.017 to i8*
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%1 = bitcast %class.SDUse* %__first.addr.016 to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(12) %0, i8* noundef nonnull align 8 dereferenceable(12) %1, i64 12, i1 false)
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%incdec.ptr = getelementptr inbounds %class.SDUse, %class.SDUse* %__first.addr.016, i64 1
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%incdec.ptr1 = getelementptr inbounds %class.SDValue, %class.SDValue* %__cur.017, i64 1
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%cmp.not = icmp eq %class.SDUse* %incdec.ptr, %__last
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br i1 %cmp.not, label %for.end.loopexit, label %for.inc
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for.end.loopexit: ; preds = %for.inc
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%incdec.ptr1.lcssa = phi %class.SDValue* [ %incdec.ptr1, %for.inc ]
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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%__cur.0.lcssa = phi %class.SDValue* [ %__result, %entry ], [ %incdec.ptr1.lcssa, %for.end.loopexit ]
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ret %class.SDValue* %__cur.0.lcssa
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}
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; Function Attrs: argmemonly nofree nosync nounwind willreturn
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
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@ -1,309 +0,0 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -loop-idiom < %s -S | FileCheck %s
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%struct.S = type { i32, i32, i8 }
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; unsigned copy_noalias(S* __restrict a, S *b, int n) {
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; for (int i = 0; i < n; i++) {
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; a[i] = b[i];
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; }
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; return sizeof(a[0]);
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; }
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; Function Attrs: nofree nounwind uwtable mustprogress
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define dso_local i32 @copy_noalias(%struct.S* noalias nocapture %a, %struct.S* nocapture readonly %b, i32 %n) local_unnamed_addr #0 {
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; CHECK-LABEL: @copy_noalias(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A1:%.*]] = bitcast %struct.S* [[A:%.*]] to i8*
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; CHECK-NEXT: [[B2:%.*]] = bitcast %struct.S* [[B:%.*]] to i8*
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; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
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; CHECK: for.body.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64
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; CHECK-NEXT: [[TMP1:%.*]] = mul nuw nsw i64 [[TMP0]], 12
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[A1]], i8* align 4 [[B2]], i64 [[TMP1]], i1 false)
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.cond.cleanup.loopexit:
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; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
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; CHECK: for.cond.cleanup:
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; CHECK-NEXT: ret i32 12
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; CHECK: for.body:
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; CHECK-NEXT: [[I_08:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[I_08]] to i64
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [[STRUCT_S:%.*]], %struct.S* [[B]], i64 [[IDXPROM]]
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; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [[STRUCT_S]], %struct.S* [[A]], i64 [[IDXPROM]]
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast %struct.S* [[ARRAYIDX2]] to i8*
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; CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.S* [[ARRAYIDX]] to i8*
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_08]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
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;
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entry:
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%cmp7 = icmp sgt i32 %n, 0
|
||||
br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup
|
||||
|
||||
for.body.preheader: ; preds = %entry
|
||||
br label %for.body
|
||||
|
||||
for.cond.cleanup.loopexit: ; preds = %for.body
|
||||
br label %for.cond.cleanup
|
||||
|
||||
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
|
||||
ret i32 12
|
||||
|
||||
for.body: ; preds = %for.body.preheader, %for.body
|
||||
%i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
|
||||
%idxprom = zext i32 %i.08 to i64
|
||||
%arrayidx = getelementptr inbounds %struct.S, %struct.S* %b, i64 %idxprom
|
||||
%arrayidx2 = getelementptr inbounds %struct.S, %struct.S* %a, i64 %idxprom
|
||||
%0 = bitcast %struct.S* %arrayidx2 to i8*
|
||||
%1 = bitcast %struct.S* %arrayidx to i8*
|
||||
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(12) %0, i8* nonnull align 4 dereferenceable(12) %1, i64 12, i1 false)
|
||||
%inc = add nuw nsw i32 %i.08, 1
|
||||
%cmp = icmp slt i32 %inc, %n
|
||||
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
|
||||
}
|
||||
|
||||
; unsigned copy_may_alias(S *a, S *b, int n) {
|
||||
; for (int i = 0; i < n; i++) {
|
||||
; a[i] = b[i];
|
||||
; }
|
||||
; return sizeof(a[0]);
|
||||
; }
|
||||
|
||||
; Function Attrs: nofree nounwind uwtable mustprogress
|
||||
define dso_local i32 @copy_may_alias(%struct.S* nocapture %a, %struct.S* nocapture readonly %b, i32 %n) local_unnamed_addr #0 {
|
||||
; CHECK-LABEL: @copy_may_alias(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[N:%.*]], 0
|
||||
; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
|
||||
; CHECK: for.body.preheader:
|
||||
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||||
; CHECK: for.cond.cleanup.loopexit:
|
||||
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
|
||||
; CHECK: for.cond.cleanup:
|
||||
; CHECK-NEXT: ret i32 12
|
||||
; CHECK: for.body:
|
||||
; CHECK-NEXT: [[I_08:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
|
||||
; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[I_08]] to i64
|
||||
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [[STRUCT_S:%.*]], %struct.S* [[B:%.*]], i64 [[IDXPROM]]
|
||||
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [[STRUCT_S]], %struct.S* [[A:%.*]], i64 [[IDXPROM]]
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = bitcast %struct.S* [[ARRAYIDX2]] to i8*
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = bitcast %struct.S* [[ARRAYIDX]] to i8*
|
||||
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(12) [[TMP0]], i8* nonnull align 4 dereferenceable(12) [[TMP1]], i64 12, i1 false)
|
||||
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_08]], 1
|
||||
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
|
||||
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
|
||||
;
|
||||
entry:
|
||||
%cmp7 = icmp sgt i32 %n, 0
|
||||
br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup
|
||||
|
||||
for.body.preheader: ; preds = %entry
|
||||
br label %for.body
|
||||
|
||||
for.cond.cleanup.loopexit: ; preds = %for.body
|
||||
br label %for.cond.cleanup
|
||||
|
||||
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
|
||||
ret i32 12
|
||||
|
||||
for.body: ; preds = %for.body.preheader, %for.body
|
||||
%i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
|
||||
%idxprom = zext i32 %i.08 to i64
|
||||
%arrayidx = getelementptr inbounds %struct.S, %struct.S* %b, i64 %idxprom
|
||||
%arrayidx2 = getelementptr inbounds %struct.S, %struct.S* %a, i64 %idxprom
|
||||
%0 = bitcast %struct.S* %arrayidx2 to i8*
|
||||
%1 = bitcast %struct.S* %arrayidx to i8*
|
||||
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(12) %0, i8* nonnull align 4 dereferenceable(12) %1, i64 12, i1 false)
|
||||
%inc = add nuw nsw i32 %i.08, 1
|
||||
%cmp = icmp slt i32 %inc, %n
|
||||
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
|
||||
}
|
||||
|
||||
%struct.R = type <{ i8, i32, i8 }>
|
||||
|
||||
; void copy_noalias_read(S* __restrict x, S* __restrict y, int n, int &s) {
|
||||
; for (int i = 0; i < n; i++) {
|
||||
; x[i] = y[i];
|
||||
; s += y[i].b;
|
||||
; }
|
||||
; }
|
||||
|
||||
; Function Attrs: nofree nounwind uwtable mustprogress
|
||||
define dso_local void @copy_noalias_read(%struct.R* noalias nocapture %x, %struct.R* noalias nocapture readonly %y, i32 %n, i32* nocapture nonnull align 4 dereferenceable(4) %s) local_unnamed_addr #0 {
|
||||
; CHECK-LABEL: @copy_noalias_read(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[X1:%.*]] = bitcast %struct.R* [[X:%.*]] to i8*
|
||||
; CHECK-NEXT: [[Y2:%.*]] = bitcast %struct.R* [[Y:%.*]] to i8*
|
||||
; CHECK-NEXT: [[CMP11:%.*]] = icmp sgt i32 [[N:%.*]], 0
|
||||
; CHECK-NEXT: br i1 [[CMP11]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
|
||||
; CHECK: for.body.lr.ph:
|
||||
; CHECK-NEXT: [[S_PROMOTED:%.*]] = load i32, i32* [[S:%.*]], align 4
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = mul nuw nsw i64 [[TMP0]], 6
|
||||
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 [[X1]], i8* align 1 [[Y2]], i64 [[TMP1]], i1 false)
|
||||
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||||
; CHECK: for.cond.for.cond.cleanup_crit_edge:
|
||||
; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD:%.*]], [[FOR_BODY]] ]
|
||||
; CHECK-NEXT: store i32 [[ADD_LCSSA]], i32* [[S]], align 4
|
||||
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
|
||||
; CHECK: for.cond.cleanup:
|
||||
; CHECK-NEXT: ret void
|
||||
; CHECK: for.body:
|
||||
; CHECK-NEXT: [[ADD13:%.*]] = phi i32 [ [[S_PROMOTED]], [[FOR_BODY_LR_PH]] ], [ [[ADD]], [[FOR_BODY]] ]
|
||||
; CHECK-NEXT: [[I_012:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
|
||||
; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[I_012]] to i64
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[STRUCT_R:%.*]], %struct.R* [[X]], i64 [[IDXPROM]], i32 0
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [[STRUCT_R]], %struct.R* [[Y]], i64 [[IDXPROM]], i32 0
|
||||
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds [[STRUCT_R]], %struct.R* [[Y]], i64 [[IDXPROM]], i32 1
|
||||
; CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[B]], align 1
|
||||
; CHECK-NEXT: [[ADD]] = add nsw i32 [[ADD13]], [[TMP4]]
|
||||
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_012]], 1
|
||||
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
|
||||
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_FOR_COND_CLEANUP_CRIT_EDGE:%.*]]
|
||||
;
|
||||
entry:
|
||||
%cmp11 = icmp sgt i32 %n, 0
|
||||
br i1 %cmp11, label %for.body.lr.ph, label %for.cond.cleanup
|
||||
|
||||
for.body.lr.ph: ; preds = %entry
|
||||
%s.promoted = load i32, i32* %s, align 4
|
||||
br label %for.body
|
||||
|
||||
for.cond.for.cond.cleanup_crit_edge: ; preds = %for.body
|
||||
%add.lcssa = phi i32 [ %add, %for.body ]
|
||||
store i32 %add.lcssa, i32* %s, align 4
|
||||
br label %for.cond.cleanup
|
||||
|
||||
for.cond.cleanup: ; preds = %for.cond.for.cond.cleanup_crit_edge, %entry
|
||||
ret void
|
||||
|
||||
for.body: ; preds = %for.body.lr.ph, %for.body
|
||||
%add13 = phi i32 [ %s.promoted, %for.body.lr.ph ], [ %add, %for.body ]
|
||||
%i.012 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
|
||||
%idxprom = zext i32 %i.012 to i64
|
||||
%0 = getelementptr inbounds %struct.R, %struct.R* %x, i64 %idxprom, i32 0
|
||||
%1 = getelementptr inbounds %struct.R, %struct.R* %y, i64 %idxprom, i32 0
|
||||
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 dereferenceable(6) %0, i8* nonnull align 1 dereferenceable(6) %1, i64 6, i1 false)
|
||||
%b = getelementptr inbounds %struct.R, %struct.R* %y, i64 %idxprom, i32 1
|
||||
%2 = load i32, i32* %b, align 1
|
||||
%add = add nsw i32 %add13, %2
|
||||
%inc = add nuw nsw i32 %i.012, 1
|
||||
%cmp = icmp slt i32 %inc, %n
|
||||
br i1 %cmp, label %for.body, label %for.cond.for.cond.cleanup_crit_edge
|
||||
}
|
||||
|
||||
%struct.SPacked = type <{ i32, i32, i8 }>
|
||||
|
||||
; Function Attrs: nofree nounwind uwtable mustprogress
|
||||
define dso_local i32 @copy_noalias_packed(%struct.SPacked* noalias nocapture %a, %struct.SPacked* nocapture readonly %b, i32 %n) local_unnamed_addr #0 {
|
||||
; CHECK-LABEL: @copy_noalias_packed(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[A1:%.*]] = bitcast %struct.SPacked* [[A:%.*]] to i8*
|
||||
; CHECK-NEXT: [[B2:%.*]] = bitcast %struct.SPacked* [[B:%.*]] to i8*
|
||||
; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[N:%.*]], 0
|
||||
; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
|
||||
; CHECK: for.body.preheader:
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = mul nuw nsw i64 [[TMP0]], 9
|
||||
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 [[A1]], i8* align 1 [[B2]], i64 [[TMP1]], i1 false)
|
||||
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||||
; CHECK: for.cond.cleanup.loopexit:
|
||||
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
|
||||
; CHECK: for.cond.cleanup:
|
||||
; CHECK-NEXT: ret i32 9
|
||||
; CHECK: for.body:
|
||||
; CHECK-NEXT: [[I_08:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
|
||||
; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[I_08]] to i64
|
||||
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [[STRUCT_SPACKED:%.*]], %struct.SPacked* [[B]], i64 [[IDXPROM]]
|
||||
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [[STRUCT_SPACKED]], %struct.SPacked* [[A]], i64 [[IDXPROM]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = bitcast %struct.SPacked* [[ARRAYIDX2]] to i8*
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.SPacked* [[ARRAYIDX]] to i8*
|
||||
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_08]], 1
|
||||
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
|
||||
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
|
||||
;
|
||||
entry:
|
||||
%cmp7 = icmp sgt i32 %n, 0
|
||||
br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup
|
||||
|
||||
for.body.preheader: ; preds = %entry
|
||||
br label %for.body
|
||||
|
||||
for.cond.cleanup.loopexit: ; preds = %for.body
|
||||
br label %for.cond.cleanup
|
||||
|
||||
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
|
||||
ret i32 9
|
||||
|
||||
for.body: ; preds = %for.body.preheader, %for.body
|
||||
%i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
|
||||
%idxprom = zext i32 %i.08 to i64
|
||||
%arrayidx = getelementptr inbounds %struct.SPacked, %struct.SPacked* %b, i64 %idxprom
|
||||
%arrayidx2 = getelementptr inbounds %struct.SPacked, %struct.SPacked* %a, i64 %idxprom
|
||||
%0 = bitcast %struct.SPacked* %arrayidx2 to i8*
|
||||
%1 = bitcast %struct.SPacked* %arrayidx to i8*
|
||||
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 dereferenceable(9) %0, i8* nonnull align 1 dereferenceable(9) %1, i64 9, i1 false)
|
||||
%inc = add nuw nsw i32 %i.08, 1
|
||||
%cmp = icmp slt i32 %inc, %n
|
||||
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
|
||||
}
|
||||
|
||||
%struct.SAligned = type { i32, i32, i8, [7 x i8] }
|
||||
|
||||
define dso_local i32 @copy_noalias_aligned(%struct.SAligned* noalias nocapture %a, %struct.SAligned* nocapture readonly %b, i32 %n) local_unnamed_addr #0 {
|
||||
; CHECK-LABEL: @copy_noalias_aligned(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[A1:%.*]] = bitcast %struct.SAligned* [[A:%.*]] to i8*
|
||||
; CHECK-NEXT: [[B2:%.*]] = bitcast %struct.SAligned* [[B:%.*]] to i8*
|
||||
; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[N:%.*]], 0
|
||||
; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
|
||||
; CHECK: for.body.preheader:
|
||||
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = shl nuw nsw i64 [[TMP0]], 4
|
||||
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 [[A1]], i8* align 16 [[B2]], i64 [[TMP1]], i1 false)
|
||||
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||||
; CHECK: for.cond.cleanup.loopexit:
|
||||
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
|
||||
; CHECK: for.cond.cleanup:
|
||||
; CHECK-NEXT: ret i32 16
|
||||
; CHECK: for.body:
|
||||
; CHECK-NEXT: [[I_08:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
|
||||
; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[I_08]] to i64
|
||||
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [[STRUCT_SALIGNED:%.*]], %struct.SAligned* [[B]], i64 [[IDXPROM]]
|
||||
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [[STRUCT_SALIGNED]], %struct.SAligned* [[A]], i64 [[IDXPROM]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = bitcast %struct.SAligned* [[ARRAYIDX2]] to i8*
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.SAligned* [[ARRAYIDX]] to i8*
|
||||
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_08]], 1
|
||||
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
|
||||
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
|
||||
;
|
||||
entry:
|
||||
%cmp7 = icmp sgt i32 %n, 0
|
||||
br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup
|
||||
|
||||
for.body.preheader: ; preds = %entry
|
||||
br label %for.body
|
||||
|
||||
for.cond.cleanup.loopexit: ; preds = %for.body
|
||||
br label %for.cond.cleanup
|
||||
|
||||
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
|
||||
ret i32 16
|
||||
|
||||
for.body: ; preds = %for.body.preheader, %for.body
|
||||
%i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
|
||||
%idxprom = zext i32 %i.08 to i64
|
||||
%arrayidx = getelementptr inbounds %struct.SAligned, %struct.SAligned* %b, i64 %idxprom
|
||||
%arrayidx2 = getelementptr inbounds %struct.SAligned, %struct.SAligned* %a, i64 %idxprom
|
||||
%0 = bitcast %struct.SAligned* %arrayidx2 to i8*
|
||||
%1 = bitcast %struct.SAligned* %arrayidx to i8*
|
||||
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 16 dereferenceable(16) %0, i8* nonnull align 16 dereferenceable(16) %1, i64 16, i1 false)
|
||||
%inc = add nuw nsw i32 %i.08, 1
|
||||
%cmp = icmp slt i32 %inc, %n
|
||||
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
|
||||
}
|
||||
|
||||
; Function Attrs: argmemonly nofree nosync nounwind willreturn
|
||||
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
|
||||
@ -11,7 +11,7 @@ target triple = "x86_64-unknown-linux-gnu"
|
||||
; *begin = value;
|
||||
; }
|
||||
|
||||
; CHECK: remark: <stdin>:4:1: Transformed loop-strided store in _Z15my_basic_memsetPcS_c function into a call to llvm.memset.p0i8.i64() intrinsic
|
||||
; CHECK: remark: <stdin>:4:1: Transformed loop-strided store into a call to llvm.memset.p0i8.i64() function
|
||||
|
||||
define void @_Z15my_basic_memsetPcS_c(i8* %ptr, i8* %end, i8 %value) {
|
||||
; CHECK-LABEL: @_Z15my_basic_memsetPcS_c(
|
||||
|
||||
Loading…
Reference in New Issue
Block a user