diff --git a/llvm/test/Analysis/MemorySSA/pr49859.ll b/llvm/test/Analysis/MemorySSA/pr49859.ll new file mode 100644 index 000000000000..8e955b56554d --- /dev/null +++ b/llvm/test/Analysis/MemorySSA/pr49859.ll @@ -0,0 +1,96 @@ +; RUN: opt -passes='loop-mssa(licm),print' -disable-output < %s 2>&1 | FileCheck %s +; REQUIRES: asserts + +@arr = global [12 x i8] [i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12], align 1 + +; CHECK-LABEL: @func() +define void @func() { +entry: + %res.addr.i = alloca i8, align 1 + %sum = alloca i8, align 1 + %n = alloca i8, align 1 + %i = alloca i8, align 1 + %cleanup.dest.slot = alloca i32, align 1 + call void @llvm.lifetime.start.p0i8(i64 1, i8* %sum) #3 + store i8 0, i8* %sum, align 1 + call void @llvm.lifetime.start.p0i8(i64 1, i8* %n) #3 + %call = call i8 @idi(i8 10) + store i8 %call, i8* %n, align 1 + call void @llvm.lifetime.start.p0i8(i64 1, i8* %i) #3 + store i8 0, i8* %i, align 1 + br label %for.cond + +for.cond: ; preds = %for.inc, %entry + %0 = load i8, i8* %i, align 1 + %1 = load i8, i8* %n, align 1 + %cmp = icmp slt i8 %0, %1 + br i1 %cmp, label %for.body, label %for.cond.cleanup + +for.cond.cleanup: ; preds = %for.cond + store i32 2, i32* %cleanup.dest.slot, align 1 + br label %final.cleanup + +for.body: ; preds = %for.cond + %2 = load i8, i8* %i, align 1 + %idxprom = sext i8 %2 to i32 + %arrayidx = getelementptr inbounds [12 x i8], [12 x i8]* @arr, i32 0, i32 %idxprom + %3 = load i8, i8* %arrayidx, align 1 + %cmp1 = icmp eq i8 %3, 3 + br i1 %cmp1, label %if.then, label %if.end + +if.then: ; preds = %for.body + store i32 2, i32* %cleanup.dest.slot, align 1 + br label %final.cleanup + +if.end: ; preds = %for.body + %4 = load i8, i8* %i, align 1 + %idxprom2 = sext i8 %4 to i32 + %arrayidx3 = getelementptr inbounds [12 x i8], [12 x i8]* @arr, i32 0, i32 %idxprom2 + %5 = load i8, i8* %arrayidx3, align 1 + %6 = load i8, i8* %sum, align 1 + %add = add nsw i8 %6, %5 + store i8 %add, i8* %sum, align 1 + br label %for.inc + +for.inc: ; preds = %if.end + %7 = load i8, i8* %i, align 1 + %inc = add nsw i8 %7, 1 + store i8 %inc, i8* %i, align 1 + br label %for.cond + +; CHECK: final.cleanup: +; CHECK-NEXT: ; [[NO20:.*]] = MemoryPhi({if.then,[[NO9:.*]]},{for.cond.cleanup,[[NO8:.*]]}) +; CHECK-NEXT: ; [[NO12:.*]] = MemoryDef([[NO20]]) +; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* %i) +final.cleanup: ; preds = %if.then, %for.cond.cleanup + call void @llvm.lifetime.end.p0i8(i64 1, i8* %i) #3 + br label %for.end + +; CHECK: for.end: +; CHECK-NEXT: ; MemoryUse([[NO12]]) +; CHECK-NEXT: %3 = load i8, i8* %sum, align 1 +for.end: ; preds = %final.cleanup + %8 = load i8, i8* %sum, align 1 + call void @llvm.lifetime.start.p0i8(i64 1, i8* %res.addr.i) + store i8 %8, i8* %res.addr.i, align 1 + %9 = load i8, i8* %res.addr.i, align 1 + call void @foo(i8 %9) #3 + call void @llvm.lifetime.end.p0i8(i64 1, i8* %res.addr.i) + call void @llvm.lifetime.end.p0i8(i64 1, i8* %n) #3 + call void @llvm.lifetime.end.p0i8(i64 1, i8* %sum) #3 + ret void +} + +; Function Attrs: argmemonly nofree nosync nounwind willreturn +declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1 + +declare i8 @idi(i8) + +; Function Attrs: argmemonly nofree nosync nounwind willreturn +declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1 + +; Function Attrs: nounwind +declare void @foo(i8) + +attributes #1 = { argmemonly nofree nosync nounwind willreturn } +attributes #3 = { nounwind }