<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Hal,<div class=""><br class=""></div><div class="">looks like this change broke the stage2 compiler: <a href="http://lab.llvm.org:8080/green/job/clang-stage2-configure-Rlto/6989/" class="">http://lab.llvm.org:8080/green/job/clang-stage2-configure-Rlto/6989/</a></div><div class=""><br class=""></div><div class="">Could you please revert the patch?</div><div class=""><br class=""></div><div class="">Thanks</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Juergen</div><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Oct 27, 2015, at 1:37 PM, Hal Finkel via llvm-commits <<a href="mailto:llvm-commits@lists.llvm.org" class="">llvm-commits@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Author: hfinkel<br class="">Date: Tue Oct 27 15:37:04 2015<br class="">New Revision: 251451<br class=""><br class="">URL: <a href="http://llvm.org/viewvc/llvm-project?rev=251451&view=rev" class="">http://llvm.org/viewvc/llvm-project?rev=251451&view=rev</a><br class="">Log:<br class="">[AliasSetTracker] Use mod/ref information for UnknownInstr<br class=""><br class="">AliasSetTracker does not need to convert the access mode to ModRefAccess if the<br class="">new visited UnknownInst has only 'REF' modrefinfo to existing pointers in the<br class="">sets.<br class=""><br class="">Patch by Andrew Zhogin!<br class=""><br class="">Added:<br class=""> llvm/trunk/test/Transforms/LICM/licm_call_referenced_ptr.ll<br class="">Modified:<br class=""> llvm/trunk/include/llvm/Analysis/AliasSetTracker.h<br class=""> llvm/trunk/lib/Analysis/AliasSetTracker.cpp<br class=""><br class="">Modified: llvm/trunk/include/llvm/Analysis/AliasSetTracker.h<br class="">URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/AliasSetTracker.h?rev=251451&r1=251450&r2=251451&view=diff" class="">http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/AliasSetTracker.h?rev=251451&r1=251450&r2=251451&view=diff</a><br class="">==============================================================================<br class="">--- llvm/trunk/include/llvm/Analysis/AliasSetTracker.h (original)<br class="">+++ llvm/trunk/include/llvm/Analysis/AliasSetTracker.h Tue Oct 27 15:37:04 2015<br class="">@@ -124,12 +124,7 @@ class AliasSet : public ilist_node<Alias<br class=""> /// memory (and not any particular access), whether it modifies or references<br class=""> /// the memory, or whether it does both. The lattice goes from "NoAccess" to<br class=""> /// either RefAccess or ModAccess, then to ModRefAccess as necessary.<br class="">- enum AccessLattice {<br class="">- NoAccess = 0,<br class="">- RefAccess = 1,<br class="">- ModAccess = 2,<br class="">- ModRefAccess = RefAccess | ModAccess<br class="">- };<br class="">+ typedef ModRefInfo AccessLattice;<br class=""> unsigned Access : 2;<br class=""><br class=""> /// The kind of alias relationship between pointers of the set.<br class="">@@ -160,8 +155,8 @@ class AliasSet : public ilist_node<Alias<br class=""><br class=""> public:<br class=""> /// Accessors...<br class="">- bool isRef() const { return Access & RefAccess; }<br class="">- bool isMod() const { return Access & ModAccess; }<br class="">+ bool isRef() const { return Access & MRI_Ref; }<br class="">+ bool isMod() const { return Access & MRI_Mod; }<br class=""> bool isMustAlias() const { return Alias == SetMustAlias; }<br class=""> bool isMayAlias() const { return Alias == SetMayAlias; }<br class=""><br class="">@@ -226,7 +221,7 @@ private:<br class=""> friend struct ilist_sentinel_traits<AliasSet>;<br class=""> AliasSet()<br class=""> : PtrList(nullptr), PtrListEnd(&PtrList), Forward(nullptr), RefCount(0),<br class="">- Access(NoAccess), Alias(SetMustAlias), Volatile(false) {<br class="">+ Access(MRI_NoModRef), Alias(SetMustAlias), Volatile(false) {<br class=""> }<br class=""><br class=""> AliasSet(const AliasSet &AS) = delete;<br class="">@@ -254,9 +249,9 @@ private:<br class=""> void removeFromTracker(AliasSetTracker &AST);<br class=""><br class=""> void addPointer(AliasSetTracker &AST, PointerRec &Entry, uint64_t Size,<br class="">- const AAMDNodes &AAInfo,<br class="">+ const AAMDNodes &AAInfo, ModRefInfo MR,<br class=""> bool KnownMustAlias = false);<br class="">- void addUnknownInst(Instruction *I, AliasAnalysis &AA);<br class="">+ void addUnknownInst(Instruction *I, AliasAnalysis &AA, ModRefInfo MR);<br class=""> void removeUnknownInst(AliasSetTracker &AST, Instruction *I) {<br class=""> bool WasEmpty = UnknownInsts.empty();<br class=""> for (size_t i = 0, e = UnknownInsts.size(); i != e; ++i)<br class="">@@ -273,10 +268,18 @@ private:<br class=""> public:<br class=""> /// aliasesPointer - Return true if the specified pointer "may" (or must)<br class=""> /// alias one of the members in the set.<br class="">- ///<br class="">+ /// MRcommon - if Ptr is aliased by existing UnknownInsts,<br class="">+ /// then not-null MRcommon will be set to the worst ModRefInfo met<br class="">+ /// <br class=""> bool aliasesPointer(const Value *Ptr, uint64_t Size, const AAMDNodes &AAInfo,<br class="">- AliasAnalysis &AA) const;<br class="">- bool aliasesUnknownInst(const Instruction *Inst, AliasAnalysis &AA) const;<br class="">+ AliasAnalysis &AA, ModRefInfo* MRcommon = nullptr) const;<br class="">+ /// aliasesUnknownInst - Return true if the specified UnknownInst<br class="">+ /// has not-null ModRefInfo (not MRI_NoModRef) with some<br class="">+ /// pointer or UnknownInst already existing in AliasSet<br class="">+ /// MRcommon - not-null MRcommon will be set to the worst ModRefInfo met<br class="">+ /// <br class="">+ bool aliasesUnknownInst(const Instruction *Inst, AliasAnalysis &AA,<br class="">+ ModRefInfo* MRcommon = nullptr) const;<br class=""> };<br class=""><br class=""> inline raw_ostream& operator<<(raw_ostream &OS, const AliasSet &AS) {<br class="">@@ -434,9 +437,11 @@ private:<br class=""> return AS;<br class=""> }<br class=""> AliasSet *findAliasSetForPointer(const Value *Ptr, uint64_t Size,<br class="">- const AAMDNodes &AAInfo);<br class="">+ const AAMDNodes &AAInfo,<br class="">+ ModRefInfo* MRcommonPtr = nullptr);<br class=""><br class="">- AliasSet *findAliasSetForUnknownInst(Instruction *Inst);<br class="">+ AliasSet *findAliasSetForUnknownInst(Instruction *Inst,<br class="">+ ModRefInfo* MRcommonPtr = nullptr);<br class=""> };<br class=""><br class=""> inline raw_ostream& operator<<(raw_ostream &OS, const AliasSetTracker &AST) {<br class=""><br class="">Modified: llvm/trunk/lib/Analysis/AliasSetTracker.cpp<br class="">URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/AliasSetTracker.cpp?rev=251451&r1=251450&r2=251451&view=diff" class="">http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/AliasSetTracker.cpp?rev=251451&r1=251450&r2=251451&view=diff</a><br class="">==============================================================================<br class="">--- llvm/trunk/lib/Analysis/AliasSetTracker.cpp (original)<br class="">+++ llvm/trunk/lib/Analysis/AliasSetTracker.cpp Tue Oct 27 15:37:04 2015<br class="">@@ -95,7 +95,7 @@ void AliasSet::removeFromTracker(AliasSe<br class=""><br class=""> void AliasSet::addPointer(AliasSetTracker &AST, PointerRec &Entry,<br class=""> uint64_t Size, const AAMDNodes &AAInfo,<br class="">- bool KnownMustAlias) {<br class="">+ ModRefInfo MR, bool KnownMustAlias) {<br class=""> assert(!Entry.hasAliasSet() && "Entry already in set!");<br class=""><br class=""> // Check to see if we have to downgrade to _may_ alias.<br class="">@@ -112,6 +112,9 @@ void AliasSet::addPointer(AliasSetTracke<br class=""> assert(Result != NoAlias && "Cannot be part of must set!");<br class=""> }<br class=""><br class="">+ // upgrading access if existing UnknownInst has ModRef with new pointer<br class="">+ Access |= MR;<br class="">+<br class=""> Entry.setAliasSet(this);<br class=""> Entry.updateSizeAndAAInfo(Size, AAInfo);<br class=""><br class="">@@ -123,20 +126,34 @@ void AliasSet::addPointer(AliasSetTracke<br class=""> addRef(); // Entry points to alias set.<br class=""> }<br class=""><br class="">-void AliasSet::addUnknownInst(Instruction *I, AliasAnalysis &AA) {<br class="">+void AliasSet::addUnknownInst(Instruction *I, AliasAnalysis &AA,<br class="">+ ModRefInfo MR) {<br class=""> if (UnknownInsts.empty())<br class=""> addRef();<br class=""> UnknownInsts.emplace_back(I);<br class=""><br class=""> if (!I->mayWriteToMemory()) {<br class=""> Alias = SetMayAlias;<br class="">- Access |= RefAccess;<br class="">+ Access |= MRI_Ref;<br class=""> return;<br class=""> }<br class=""><br class="">- // FIXME: This should use mod/ref information to make this not suck so bad<br class=""> Alias = SetMayAlias;<br class="">- Access = ModRefAccess;<br class="">+ Access |= MR;<br class="">+}<br class="">+<br class="">+namespace {<br class="">+ /// returns true if there is no request of worst ModRefInfo<br class="">+ /// (MRcommonPtr is null)<br class="">+ /// or when achieved maximum ModRefInfo (MRI_ModRef).<br class="">+ bool processMR(ModRefInfo MR, ModRefInfo* MRcommonPtr, ModRefInfo& MRcommon) {<br class="">+ MRcommon = ModRefInfo(MRcommon | MR);<br class="">+ return !MRcommonPtr || (MRcommon == MRI_ModRef);<br class="">+ }<br class="">+ bool fillExitMR(ModRefInfo* MRcommonPtr, ModRefInfo& MRcommon) {<br class="">+ if (MRcommonPtr) *MRcommonPtr = MRcommon;<br class="">+ return MRcommon != MRI_NoModRef;<br class="">+ }<br class=""> }<br class=""><br class=""> /// aliasesPointer - Return true if the specified pointer "may" (or must)<br class="">@@ -144,7 +161,8 @@ void AliasSet::addUnknownInst(Instructio<br class=""> ///<br class=""> bool AliasSet::aliasesPointer(const Value *Ptr, uint64_t Size,<br class=""> const AAMDNodes &AAInfo,<br class="">- AliasAnalysis &AA) const {<br class="">+ AliasAnalysis &AA,<br class="">+ ModRefInfo* MRcommonPtr) const {<br class=""> if (Alias == SetMustAlias) {<br class=""> assert(UnknownInsts.empty() && "Illegal must alias set!");<br class=""><br class="">@@ -164,35 +182,44 @@ bool AliasSet::aliasesPointer(const Valu<br class=""> MemoryLocation(I.getPointer(), I.getSize(), I.getAAInfo())))<br class=""> return true;<br class=""><br class="">+ // to gather worst ModRefInfo<br class="">+ ModRefInfo MRcommon = MRI_NoModRef;<br class="">+<br class=""> // Check the unknown instructions...<br class=""> if (!UnknownInsts.empty()) {<br class=""> for (unsigned i = 0, e = UnknownInsts.size(); i != e; ++i)<br class="">- if (AA.getModRefInfo(UnknownInsts[i],<br class="">- MemoryLocation(Ptr, Size, AAInfo)) != MRI_NoModRef)<br class="">- return true;<br class="">+ if (processMR(AA.getModRefInfo(UnknownInsts[i],<br class="">+ MemoryLocation(Ptr, Size, AAInfo)), MRcommonPtr, MRcommon))<br class="">+ return fillExitMR(MRcommonPtr, MRcommon);<br class=""> }<br class=""><br class="">- return false;<br class="">+ return fillExitMR(MRcommonPtr, MRcommon);<br class=""> }<br class=""><br class=""> bool AliasSet::aliasesUnknownInst(const Instruction *Inst,<br class="">- AliasAnalysis &AA) const {<br class="">+ AliasAnalysis &AA,<br class="">+ ModRefInfo* MRcommonPtr) const {<br class=""> if (!Inst->mayReadOrWriteMemory())<br class=""> return false;<br class=""><br class="">+ // to gather worst ModRefInfo<br class="">+ ModRefInfo MRcommon = MRI_NoModRef;<br class="">+<br class=""> for (unsigned i = 0, e = UnknownInsts.size(); i != e; ++i) {<br class=""> ImmutableCallSite C1(getUnknownInst(i)), C2(Inst);<br class="">- if (!C1 || !C2 || AA.getModRefInfo(C1, C2) != MRI_NoModRef ||<br class="">- AA.getModRefInfo(C2, C1) != MRI_NoModRef)<br class="">- return true;<br class="">+ if (!C1 || !C2 ||<br class="">+ processMR(AA.getModRefInfo(C1, C2), MRcommonPtr, MRcommon) ||<br class="">+ processMR(AA.getModRefInfo(C2, C1), MRcommonPtr, MRcommon))<br class="">+ return fillExitMR(MRcommonPtr, MRcommon);<br class=""> }<br class=""><br class="">- for (iterator I = begin(), E = end(); I != E; ++I)<br class="">- if (AA.getModRefInfo(Inst, MemoryLocation(I.getPointer(), I.getSize(),<br class="">- I.getAAInfo())) != MRI_NoModRef)<br class="">- return true;<br class="">-<br class="">- return false;<br class="">+ for (iterator I = begin(), E = end(); I != E; ++I) {<br class="">+ ModRefInfo MR = AA.getModRefInfo(<br class="">+ Inst, MemoryLocation(I.getPointer(), I.getSize(), I.getAAInfo()));<br class="">+ if (processMR(MR, MRcommonPtr, MRcommon))<br class="">+ return fillExitMR(MRcommonPtr, MRcommon);<br class="">+ }<br class="">+ return fillExitMR(MRcommonPtr, MRcommon);<br class=""> }<br class=""><br class=""> void AliasSetTracker::clear() {<br class="">@@ -214,11 +241,15 @@ void AliasSetTracker::clear() {<br class=""> ///<br class=""> AliasSet *AliasSetTracker::findAliasSetForPointer(const Value *Ptr,<br class=""> uint64_t Size,<br class="">- const AAMDNodes &AAInfo) {<br class="">+ const AAMDNodes &AAInfo,<br class="">+ ModRefInfo* MRcommonPtr) {<br class=""> AliasSet *FoundSet = nullptr;<br class=""> for (iterator I = begin(), E = end(); I != E;) {<br class=""> iterator Cur = I++;<br class="">- if (Cur->Forward || !Cur->aliasesPointer(Ptr, Size, AAInfo, AA)) continue;<br class="">+ ModRefInfo MR = MRI_NoModRef;<br class="">+ if (Cur->Forward || !Cur->aliasesPointer(Ptr, Size, AAInfo, AA, &MR))<br class="">+ continue;<br class="">+ *MRcommonPtr = ModRefInfo(*MRcommonPtr | MR);<br class=""><br class=""> if (!FoundSet) { // If this is the first alias set ptr can go into.<br class=""> FoundSet = &*Cur; // Remember it.<br class="">@@ -248,12 +279,15 @@ bool AliasSetTracker::containsUnknown(co<br class=""> return false;<br class=""> }<br class=""><br class="">-AliasSet *AliasSetTracker::findAliasSetForUnknownInst(Instruction *Inst) {<br class="">+AliasSet *AliasSetTracker::findAliasSetForUnknownInst(Instruction *Inst,<br class="">+ ModRefInfo* MRcommonPtr) {<br class=""> AliasSet *FoundSet = nullptr;<br class=""> for (iterator I = begin(), E = end(); I != E;) {<br class=""> iterator Cur = I++;<br class="">- if (Cur->Forward || !Cur->aliasesUnknownInst(Inst, AA))<br class="">+ ModRefInfo MR = MRI_NoModRef;<br class="">+ if (Cur->Forward || !Cur->aliasesUnknownInst(Inst, AA, &MR))<br class=""> continue;<br class="">+ *MRcommonPtr = ModRefInfo(*MRcommonPtr | MR);<br class=""> if (!FoundSet) // If this is the first alias set ptr can go into.<br class=""> FoundSet = &*Cur; // Remember it.<br class=""> else if (!Cur->Forward) // Otherwise, we must merge the sets.<br class="">@@ -279,22 +313,23 @@ AliasSet &AliasSetTracker::getAliasSetFo<br class=""> return *Entry.getAliasSet(*this)->getForwardedTarget(*this);<br class=""> }<br class=""><br class="">- if (AliasSet *AS = findAliasSetForPointer(Pointer, Size, AAInfo)) {<br class="">+ ModRefInfo MR = MRI_NoModRef;<br class="">+ if (AliasSet *AS = findAliasSetForPointer(Pointer, Size, AAInfo, &MR)) {<br class=""> // Add it to the alias set it aliases.<br class="">- AS->addPointer(*this, Entry, Size, AAInfo);<br class="">+ AS->addPointer(*this, Entry, Size, AAInfo, MR);<br class=""> return *AS;<br class=""> }<br class=""><br class=""> if (New) *New = true;<br class=""> // Otherwise create a new alias set to hold the loaded pointer.<br class=""> AliasSets.push_back(new AliasSet());<br class="">- AliasSets.back().addPointer(*this, Entry, Size, AAInfo);<br class="">+ AliasSets.back().addPointer(*this, Entry, Size, AAInfo, MRI_NoModRef);<br class=""> return AliasSets.back();<br class=""> }<br class=""><br class=""> bool AliasSetTracker::add(Value *Ptr, uint64_t Size, const AAMDNodes &AAInfo) {<br class=""> bool NewPtr;<br class="">- addPointer(Ptr, Size, AAInfo, AliasSet::NoAccess, NewPtr);<br class="">+ addPointer(Ptr, Size, AAInfo, MRI_NoModRef, NewPtr);<br class=""> return NewPtr;<br class=""> }<br class=""><br class="">@@ -305,7 +340,7 @@ bool AliasSetTracker::add(LoadInst *LI)<br class=""> AAMDNodes AAInfo;<br class=""> LI->getAAMetadata(AAInfo);<br class=""><br class="">- AliasSet::AccessLattice Access = AliasSet::RefAccess;<br class="">+ AliasSet::AccessLattice Access = MRI_Ref;<br class=""> bool NewPtr;<br class=""> const DataLayout &DL = LI->getModule()->getDataLayout();<br class=""> AliasSet &AS = addPointer(LI->getOperand(0),<br class="">@@ -321,7 +356,7 @@ bool AliasSetTracker::add(StoreInst *SI)<br class=""> AAMDNodes AAInfo;<br class=""> SI->getAAMetadata(AAInfo);<br class=""><br class="">- AliasSet::AccessLattice Access = AliasSet::ModAccess;<br class="">+ AliasSet::AccessLattice Access = MRI_Mod;<br class=""> bool NewPtr;<br class=""> const DataLayout &DL = SI->getModule()->getDataLayout();<br class=""> Value *Val = SI->getOperand(0);<br class="">@@ -338,7 +373,7 @@ bool AliasSetTracker::add(VAArgInst *VAA<br class=""><br class=""> bool NewPtr;<br class=""> addPointer(VAAI->getOperand(0), MemoryLocation::UnknownSize, AAInfo,<br class="">- AliasSet::ModRefAccess, NewPtr);<br class="">+ MRI_ModRef, NewPtr);<br class=""> return NewPtr;<br class=""> }<br class=""><br class="">@@ -349,14 +384,15 @@ bool AliasSetTracker::addUnknown(Instruc<br class=""> if (!Inst->mayReadOrWriteMemory())<br class=""> return true; // doesn't alias anything<br class=""><br class="">- AliasSet *AS = findAliasSetForUnknownInst(Inst);<br class="">+ ModRefInfo MR = MRI_NoModRef;<br class="">+ AliasSet *AS = findAliasSetForUnknownInst(Inst, &MR);<br class=""> if (AS) {<br class="">- AS->addUnknownInst(Inst, AA);<br class="">+ AS->addUnknownInst(Inst, AA, MR);<br class=""> return false;<br class=""> }<br class=""> AliasSets.push_back(new AliasSet());<br class=""> AS = &AliasSets.back();<br class="">- AS->addUnknownInst(Inst, AA);<br class="">+ AS->addUnknownInst(Inst, AA, MR);<br class=""> return true;<br class=""> }<br class=""><br class="">@@ -556,7 +592,7 @@ void AliasSetTracker::copyValue(Value *F<br class=""> I = PointerMap.find_as(From);<br class=""> AliasSet *AS = I->second->getAliasSet(*this);<br class=""> AS->addPointer(*this, Entry, I->second->getSize(),<br class="">- I->second->getAAInfo(),<br class="">+ I->second->getAAInfo(), MRI_NoModRef,<br class=""> true);<br class=""> }<br class=""><br class="">@@ -570,10 +606,10 @@ void AliasSet::print(raw_ostream &OS) co<br class=""> OS << " AliasSet[" << (const void*)this << ", " << RefCount << "] ";<br class=""> OS << (Alias == SetMustAlias ? "must" : "may") << " alias, ";<br class=""> switch (Access) {<br class="">- case NoAccess: OS << "No access "; break;<br class="">- case RefAccess: OS << "Ref "; break;<br class="">- case ModAccess: OS << "Mod "; break;<br class="">- case ModRefAccess: OS << "Mod/Ref "; break;<br class="">+ case MRI_NoModRef: OS << "No access "; break;<br class="">+ case MRI_Ref: OS << "Ref "; break;<br class="">+ case MRI_Mod: OS << "Mod "; break;<br class="">+ case MRI_ModRef: OS << "Mod/Ref "; break;<br class=""> default: llvm_unreachable("Bad value for Access!");<br class=""> }<br class=""> if (isVolatile()) OS << "[volatile] ";<br class=""><br class="">Added: llvm/trunk/test/Transforms/LICM/licm_call_referenced_ptr.ll<br class="">URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LICM/licm_call_referenced_ptr.ll?rev=251451&view=auto" class="">http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LICM/licm_call_referenced_ptr.ll?rev=251451&view=auto</a><br class="">==============================================================================<br class="">--- llvm/trunk/test/Transforms/LICM/licm_call_referenced_ptr.ll (added)<br class="">+++ llvm/trunk/test/Transforms/LICM/licm_call_referenced_ptr.ll Tue Oct 27 15:37:04 2015<br class="">@@ -0,0 +1,40 @@<br class="">+; RUN: opt < %s -basicaa -licm -S | FileCheck %s<br class="">+<br class="">+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind<br class="">+<br class="">+define i8 @"main"() {<br class="">+entry:<br class="">+ %A = alloca [64 x i8]<br class="">+ %B = alloca [4 x i8]<br class="">+ %A0 = getelementptr [64 x i8], [64 x i8]* %A, i32 0, i32 0<br class="">+ %B0 = getelementptr [4 x i8], [4 x i8]* %B, i32 0, i32 0<br class="">+ %B1 = getelementptr [4 x i8], [4 x i8]* %B, i32 0, i32 1<br class="">+ %B2 = getelementptr [4 x i8], [4 x i8]* %B, i32 0, i32 2<br class="">+ %B3 = getelementptr [4 x i8], [4 x i8]* %B, i32 0, i32 3<br class="">+ store i8 0, i8* %A0<br class="">+ store i8 32, i8* %B0<br class="">+ store i8 73, i8* %B1<br class="">+ store i8 74, i8* %B2<br class="">+ store i8 75, i8* %B3<br class="">+ br label %loop_begin<br class="">+<br class="">+loop_begin:<br class="">+; CHECK: loop_begin:<br class="">+; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A0, i8* %B0, i64 4, i32 4, i1 false)<br class="">+<br class="">+ %b_val = load i8, i8* %B0<br class="">+ <br class="">+ ; *B is invariant in loop and limit_val must be hoisted<br class="">+ %limit_val_1 = mul i8 %b_val, 3<br class="">+ %limit_val = add i8 %limit_val_1, 67<br class="">+ <br class="">+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A0, i8* %B0, i64 4, i32 4, i1 false)<br class="">+ <br class="">+ %exitcond = icmp ugt i8 164, %limit_val<br class="">+ br i1 %exitcond, label %after_loop, label %loop_begin<br class="">+<br class="">+after_loop:<br class="">+ %b_val_result = load i8, i8* %B0<br class="">+ ret i8 %b_val_result<br class="">+}<br class="">+<br class=""><br class=""><br class="">_______________________________________________<br class="">llvm-commits mailing list<br class=""><a href="mailto:llvm-commits@lists.llvm.org" class="">llvm-commits@lists.llvm.org</a><br class="">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits<br class=""></div></div></blockquote></div><br class=""></div></body></html>