Index: lib/Analysis/AliasAnalysis.cpp =================================================================== --- lib/Analysis/AliasAnalysis.cpp +++ lib/Analysis/AliasAnalysis.cpp @@ -193,9 +193,9 @@ ModRefInfo ArgMask = getArgModRefInfo(CS, ArgIdx); DoesAlias = true; AllArgsMask = unionModRef(AllArgsMask, ArgMask); + // Clear IsMustAlias when May/PartialAlias is found. + IsMustAlias &= (ArgAlias == MustAlias); } - // Conservatively clear IsMustAlias unless only MustAlias is found. - IsMustAlias &= (ArgAlias == MustAlias); } } // Return NoModRef if no alias found with any argument. @@ -281,8 +281,11 @@ ModRefInfo ModRefCS1 = getModRefInfo(CS1, CS2ArgLoc); ArgMask = intersectModRef(ArgMask, ModRefCS1); - // Conservatively clear IsMustAlias unless only MustAlias is found. - IsMustAlias &= isMustSet(ModRefCS1); + // Clear IsMustAlias when alias found and Must not set, i.e. MayAlias. + // If ArgMask has Mod/Ref set, then alias exists. ArgModRefCS2 never + // has Must set, ModRefCS1 may have Must set. + if (isModOrRefSet(ArgMask)) + IsMustAlias &= isMustSet(ModRefCS1); R = intersectModRef(unionModRef(R, ArgMask), Result); if (R == Result) { @@ -320,11 +323,12 @@ ModRefInfo ArgModRefCS1 = getArgModRefInfo(CS1, CS1ArgIdx); ModRefInfo ModRefCS2 = getModRefInfo(CS2, CS1ArgLoc); if ((isModSet(ArgModRefCS1) && isModOrRefSet(ModRefCS2)) || - (isRefSet(ArgModRefCS1) && isModSet(ModRefCS2))) + (isRefSet(ArgModRefCS1) && isModSet(ModRefCS2))) { R = intersectModRef(unionModRef(R, ArgModRefCS1), Result); - // Conservatively clear IsMustAlias unless only MustAlias is found. - IsMustAlias &= isMustSet(ModRefCS2); + // Clear IsMustAlias when alias found and Must not set, i.e. MayAlias. + IsMustAlias &= isMustSet(ModRefCS2); + } if (R == Result) { // On early exit, not all args were checked, cannot set Must. @@ -571,10 +575,10 @@ // is impossible to alias the pointer we're checking. If not, we have to // assume that the call could touch the pointer, even though it doesn't // escape. - if (AR != MustAlias) - MustAlias = false; if (AR == NoAlias) continue; + if (AR != MustAlias) + MustAlias = false; if (CS.doesNotAccessMemory(ArgNo)) continue; if (CS.onlyReadsMemory(ArgNo)) { Index: lib/Analysis/BasicAliasAnalysis.cpp =================================================================== --- lib/Analysis/BasicAliasAnalysis.cpp +++ lib/Analysis/BasicAliasAnalysis.cpp @@ -823,11 +823,12 @@ // is impossible to alias the pointer we're checking. AliasResult AR = getBestAAResults().alias(MemoryLocation(*CI), MemoryLocation(Object)); - if (AR != MustAlias) - IsMustAlias = false; + // Operand doesnt alias 'Object', continue looking for other aliases if (AR == NoAlias) continue; + if (AR == MayAlias || AR == PartialAlias) + IsMustAlias = false; // Operand aliases 'Object', but call doesn't modify it. Strengthen // initial assumption and keep looking in case if there are more aliases. if (CS.onlyReadsMemory(OperandNo)) { @@ -840,7 +841,7 @@ continue; } // This operand aliases 'Object' and call reads and writes into it. - // Setting ModRef will not yield an early return below, MustAlias is not + // Setting ModRef will not yield an early return below, IsMustAlias is not // used further. Result = ModRefInfo::ModRef; break; @@ -883,11 +884,11 @@ if ((SrcAA = getBestAAResults().alias(MemoryLocation::getForSource(Inst), Loc)) == MustAlias) // Loc is exactly the memcpy source thus disjoint from memcpy dest. - return ModRefInfo::Ref; + return ModRefInfo::MustRef; if ((DestAA = getBestAAResults().alias(MemoryLocation::getForDest(Inst), Loc)) == MustAlias) // The converse case. - return ModRefInfo::Mod; + return ModRefInfo::MustMod; // It's also possible for Loc to alias both src and dest, or neither. ModRefInfo rv = ModRefInfo::NoModRef; Index: test/Analysis/BasicAA/cs-cs.ll =================================================================== --- test/Analysis/BasicAA/cs-cs.ll +++ test/Analysis/BasicAA/cs-cs.ll @@ -32,12 +32,11 @@ ; CHECK-LABEL: Function: test2a: ; CHECK: NoAlias: i8* %P, i8* %Q -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) } define void @test2b(i8* noalias %P, i8* noalias %Q) #3 { @@ -51,12 +50,11 @@ ; CHECK: NoAlias: i8* %P, i8* %Q ; CHECK: NoAlias: i8* %P, i8* %R ; CHECK: NoAlias: i8* %Q, i8* %R -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) } @@ -72,12 +70,12 @@ ; CHECK: NoAlias: i8* %P, i8* %Q ; CHECK: NoAlias: i8* %P, i8* %R ; CHECK: NoAlias: i8* %Q, i8* %R -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: Just Mod: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) } @@ -93,12 +91,12 @@ ; CHECK: NoAlias: i8* %P, i8* %Q ; CHECK: NoAlias: i8* %P, i8* %R ; CHECK: NoAlias: i8* %Q, i8* %R -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) } @@ -114,12 +112,12 @@ ; CHECK: NoAlias: i8* %P, i8* %Q ; CHECK: NoAlias: i8* %P, i8* %R ; CHECK: NoAlias: i8* %Q, i8* %R -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) ; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) } @@ -148,12 +146,12 @@ ; CHECK-LABEL: Function: test3a: ; CHECK: NoAlias: i8* %P, i8* %Q -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i1 false) } define void @test4(i8* %P, i8* noalias %Q) #3 { @@ -166,10 +164,10 @@ ; CHECK: NoAlias: i8* %P, i8* %Q ; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false) ; CHECK: NoModRef: Ptr: i8* %Q <-> tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false) -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false) } define void @test5(i8* %P, i8* %Q, i8* %R) #3 { @@ -202,14 +200,14 @@ ; CHECK: NoAlias: i8* %P, i8* %Q ; CHECK: NoAlias: i8* %P, i8* %R ; CHECK: NoAlias: i8* %Q, i8* %R -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) -; CHECK: Just Mod: Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): Ptr: i8* %P <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) ; CHECK: NoModRef: Ptr: i8* %Q <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) -; CHECK: Just Ref: Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) -; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) +; CHECK: Just Ref (MustAlias): Ptr: i8* %R <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) +; CHECK: Just Mod (MustAlias): tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i1 false) } define void @test6(i8* %P) #3 { @@ -289,8 +287,8 @@ ret void ; CHECK-LABEL: Function: test8a -; CHECK: Both ModRef: Ptr: i8* %p <-> call void @another_argmemonly_func(i8* %p, i8* %q) -; CHECK: Both ModRef: Ptr: i8* %q <-> call void @another_argmemonly_func(i8* %p, i8* %q) +; CHECK: Both ModRef (MustAlias): Ptr: i8* %p <-> call void @another_argmemonly_func(i8* %p, i8* %q) +; CHECK: Both ModRef (MustAlias): Ptr: i8* %q <-> call void @another_argmemonly_func(i8* %p, i8* %q) } define void @test8b(i8* %p, i8* %q) { entry: