diff options
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Analysis/BasicAA/invariant_group.ll | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/llvm/test/Analysis/BasicAA/invariant_group.ll b/llvm/test/Analysis/BasicAA/invariant_group.ll new file mode 100644 index 00000000000..5396afe090b --- /dev/null +++ b/llvm/test/Analysis/BasicAA/invariant_group.ll @@ -0,0 +1,48 @@ +; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s +; RUN: opt < %s -basicaa -gvn -S | FileCheck -check-prefix=CHECK-GVN %s + +; The input *.ll had been adapted from bug 37458: +; +; struct A { virtual void f(); int n; }; +; +; int h() { +; A a; +; a.n = 42; +; return __builtin_launder(&a)->n; +; } + +%struct.A = type <{ i8*, i8 }> + +; CHECK: testLaunderInvariantGroupIsNotEscapeSource +; CHECK-GVN: testLaunderInvariantGroupIsNotEscapeSource +define i8 @testLaunderInvariantGroupIsNotEscapeSource() { +; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.bitcast +; CHECK-DAG: PartialAlias: %struct.A* %a, i8* %n +; CHECK-DAG: NoAlias: i8* %a.bitcast, i8* %n +; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.laundered +; CHECK-DAG: MustAlias: i8* %a.bitcast, i8* %a.laundered +; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n +; CHECK-DAG: PartialAlias: %struct.A* %a, i8* %n.laundered +; CHECK-DAG: NoAlias: i8* %a.bitcast, i8* %n.laundered +; CHECK-DAG: MustAlias: i8* %n, i8* %n.laundered +; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n.laundered +; CHECK-DAG: NoModRef: Ptr: %struct.A* %a <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) +; CHECK-DAG: NoModRef: Ptr: i8* %a.bitcast <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) +; CHECK-DAG: NoModRef: Ptr: i8* %n <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) +; CHECK-DAG: NoModRef: Ptr: i8* %a.laundered <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) +; CHECK-DAG: NoModRef: Ptr: i8* %n.laundered <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) + +entry: + %a = alloca %struct.A, align 8 + %a.bitcast = bitcast %struct.A* %a to i8* + %n = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 1 + store i8 42, i8* %n + %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast) + %n.laundered = getelementptr inbounds i8, i8* %a.laundered, i64 8 + %v = load i8, i8* %n.laundered +; make sure that the load from %n.laundered to %v aliases the store of 42 to %n +; CHECK-GVN: ret i8 42 + ret i8 %v +} + +declare i8* @llvm.launder.invariant.group.p0i8(i8*) |
