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1; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s2; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn -S | FileCheck -check-prefix=CHECK-GVN %s3 4; The input *.ll had been adapted from bug 37458:5;6; struct A { virtual void f(); int n; };7;8; int h() {9; A a;10; a.n = 42;11; return __builtin_launder(&a)->n;12; }13 14%struct.A = type <{ ptr, i8 }>15 16; CHECK: testLaunderInvariantGroupIsNotEscapeSource17; CHECK-GVN: testLaunderInvariantGroupIsNotEscapeSource18define i8 @testLaunderInvariantGroupIsNotEscapeSource() {19; CHECK-DAG: MustAlias: i8* %a, %struct.A* %a20; CHECK-DAG: PartialAlias (off 8): %struct.A* %a, i8* %n21; CHECK-DAG: NoAlias: i8* %a, i8* %n22; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.laundered23; CHECK-DAG: MustAlias: i8* %a, i8* %a.laundered24; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n25; CHECK-DAG: PartialAlias (off 8): %struct.A* %a, i8* %n.laundered26; CHECK-DAG: NoAlias: i8* %a, i8* %n.laundered27; CHECK-DAG: MustAlias: i8* %n, i8* %n.laundered28; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n.laundered29; CHECK-DAG: NoModRef: Ptr: %struct.A* %a <-> %a.laundered = call ptr @llvm.launder.invariant.group.p0(ptr nonnull %a)30; CHECK-DAG: NoModRef: Ptr: i8* %a <-> %a.laundered = call ptr @llvm.launder.invariant.group.p0(ptr nonnull %a)31; CHECK-DAG: NoModRef: Ptr: i8* %n <-> %a.laundered = call ptr @llvm.launder.invariant.group.p0(ptr nonnull %a)32; CHECK-DAG: NoModRef: Ptr: i8* %a.laundered <-> %a.laundered = call ptr @llvm.launder.invariant.group.p0(ptr nonnull %a)33; CHECK-DAG: NoModRef: Ptr: i8* %n.laundered <-> %a.laundered = call ptr @llvm.launder.invariant.group.p0(ptr nonnull %a)34 35entry:36 %a = alloca %struct.A, align 837 load %struct.A, ptr %a38 load i8, ptr %a39 %n = getelementptr inbounds %struct.A, ptr %a, i64 0, i32 140 store i8 42, ptr %n41 %a.laundered = call ptr @llvm.launder.invariant.group.p0(ptr nonnull %a)42 load i8, ptr %a.laundered43 %n.laundered = getelementptr inbounds i8, ptr %a.laundered, i64 844 %v = load i8, ptr %n.laundered45; make sure that the load from %n.laundered to %v aliases the store of 42 to %n46; CHECK-GVN: ret i8 4247 ret i8 %v48}49 50declare ptr @llvm.launder.invariant.group.p0(ptr)51