57d57b1afd
With opaque pointers, we cannot use the pointer element type to determine the LocationSize for the AA query. Instead, -aa-eval tests are now required to have an explicit load or store for any pointer they want to compute alias results for, and the load/store types are used to determine the location size. This may affect ordering of results, and sorting within one result, as the type is not considered part of the sorted string anymore. To somewhat minimize the churn, printing still uses faux typed pointer notation.
52 lines
2.4 KiB
LLVM
52 lines
2.4 KiB
LLVM
; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn -S | FileCheck -check-prefix=CHECK-GVN %s
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; The input *.ll had been adapted from bug 37458:
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;
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; struct A { virtual void f(); int n; };
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;
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; int h() {
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; A a;
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; a.n = 42;
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; return __builtin_launder(&a)->n;
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; }
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%struct.A = type <{ i8*, i8 }>
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; CHECK: testLaunderInvariantGroupIsNotEscapeSource
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; CHECK-GVN: testLaunderInvariantGroupIsNotEscapeSource
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define i8 @testLaunderInvariantGroupIsNotEscapeSource() {
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; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.bitcast
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; CHECK-DAG: PartialAlias (off {{[0-9]+}}): %struct.A* %a, i8* %n
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; CHECK-DAG: NoAlias: i8* %a.bitcast, i8* %n
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; CHECK-DAG: MustAlias: %struct.A* %a, i8* %a.laundered
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; CHECK-DAG: MustAlias: i8* %a.bitcast, i8* %a.laundered
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; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n
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; CHECK-DAG: PartialAlias (off {{[0-9]+}}): %struct.A* %a, i8* %n.laundered
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; CHECK-DAG: NoAlias: i8* %a.bitcast, i8* %n.laundered
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; CHECK-DAG: MustAlias: i8* %n, i8* %n.laundered
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; CHECK-DAG: NoAlias: i8* %a.laundered, i8* %n.laundered
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; CHECK-DAG: NoModRef: Ptr: %struct.A* %a <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast)
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; CHECK-DAG: NoModRef: Ptr: i8* %a.bitcast <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast)
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; CHECK-DAG: NoModRef: Ptr: i8* %n <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast)
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; CHECK-DAG: NoModRef: Ptr: i8* %a.laundered <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast)
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; CHECK-DAG: NoModRef: Ptr: i8* %n.laundered <-> %a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast)
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entry:
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%a = alloca %struct.A, align 8
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%a.bitcast = bitcast %struct.A* %a to i8*
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load %struct.A, %struct.A* %a
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load i8, i8* %a.bitcast
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%n = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 1
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store i8 42, i8* %n
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%a.laundered = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull %a.bitcast)
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load i8, i8* %a.laundered
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%n.laundered = getelementptr inbounds i8, i8* %a.laundered, i64 8
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%v = load i8, i8* %n.laundered
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; make sure that the load from %n.laundered to %v aliases the store of 42 to %n
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; CHECK-GVN: ret i8 42
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ret i8 %v
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}
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declare i8* @llvm.launder.invariant.group.p0i8(i8*)
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