Index: lib/CodeGen/IslNodeBuilder.cpp =================================================================== --- lib/CodeGen/IslNodeBuilder.cpp +++ lib/CodeGen/IslNodeBuilder.cpp @@ -1198,6 +1198,7 @@ isl_id_free(ParamId); } + ValueMapT PreloadedPointers; BasicBlock *EntryBB = &Builder.GetInsertBlock()->getParent()->getEntryBlock(); auto *Alloca = new AllocaInst(AccInstTy, AccInst->getName() + ".preload.s2a"); Alloca->insertBefore(&*EntryBB->getFirstInsertionPt()); @@ -1220,10 +1221,14 @@ if (BasePtr == MA->getAccessInstruction()) ScalarMap[DerivedSAI] = Alloca; } + + if (BasePtr == AccInst && !PreloadedPointers.count(PreloadVal)) + PreloadedPointers[PreloadVal] = BasePtr; } - for (const MemoryAccess *MA : MAs) { + Annotator.addAlternativeAliasBases(PreloadedPointers); + for (const MemoryAccess *MA : MAs) { Instruction *MAAccInst = MA->getAccessInstruction(); // Use the escape system to get the correct value to users outside the SCoP. BlockGenerator::EscapeUserVectorTy EscapeUsers; Index: test/Isl/CodeGen/invariant_load_alias_metadata.ll =================================================================== --- /dev/null +++ test/Isl/CodeGen/invariant_load_alias_metadata.ll @@ -0,0 +1,26 @@ +; RUN: opt %loadPolly -polly-codegen -polly-invariant-load-hoisting=true \ +; RUN: -S < %s | FileCheck %s +; +; This test case checks whether Polly generates alias metadata in case of +; polly-invariant-load-hoisting. +; +; CHECK: store float 4.200000e+01, float* %polly.access.A.load, !alias.scope + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +define void @nometadata(float** %A) { + entry: + br label %for + + for: + %indvar = phi i64 [0, %entry], [%indvar.next, %for] + %indvar.next = add i64 %indvar, 1 + %ptrA = load float*, float** %A + store float 42.0, float* %ptrA + %icmp = icmp sle i64 %indvar, 1024 + br i1 %icmp, label %for, label %exit + + exit: + ret void +}