1 ; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s 2 ; RUN: opt < %s -basicaa -gvn -S | FileCheck -check-prefix=CHECK-GVN %s 3 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 <{ i8*, i8 }> 15 16 ; CHECK: testLaunderInvariantGroupIsNotEscapeSource 17 ; CHECK-GVN: testLaunderInvariantGroupIsNotEscapeSource 18 define i8 @testLaunderInvariantGroupIsNotEscapeSource() { 19 ; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.bitcast 20 ; CHECK-DAG: PartialAlias: %struct.A* %a, i8* %n 21 ; CHECK-DAG: NoAlias: i8* %a.bitcast, i8* %n 22 ; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.laundered 23 ; CHECK-DAG: MustAlias: i8* %a.bitcast, i8* %a.laundered 24 ; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n 25 ; CHECK-DAG: PartialAlias: %struct.A* %a, i8* %n.laundered 26 ; CHECK-DAG: NoAlias: i8* %a.bitcast, i8* %n.laundered 27 ; CHECK-DAG: MustAlias: i8* %n, i8* %n.laundered 28 ; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n.laundered 29 ; CHECK-DAG: NoModRef: Ptr: %struct.A* %a <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) 30 ; CHECK-DAG: NoModRef: Ptr: i8* %a.bitcast <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) 31 ; CHECK-DAG: NoModRef: Ptr: i8* %n <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) 32 ; CHECK-DAG: NoModRef: Ptr: i8* %a.laundered <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) 33 ; CHECK-DAG: NoModRef: Ptr: i8* %n.laundered <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) 34 35 entry: 36 %a = alloca %struct.A, align 8 37 %a.bitcast = bitcast %struct.A* %a to i8* 38 %n = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 1 39 store i8 42, i8* %n 40 %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) 41 %n.laundered = getelementptr inbounds i8, i8* %a.laundered, i64 8 42 %v = load i8, i8* %n.laundered 43 ; make sure that the load from %n.laundered to %v aliases the store of 42 to %n 44 ; CHECK-GVN: ret i8 42 45 ret i8 %v 46 } 47 48 declare i8* @llvm.launder.invariant.group.p0i8(i8*) 49
