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7b0a514671
Addressing latter comments in D95543: - `AliasResult::Result` renamed to `AliasResult::Kind` - Offset printing added for `PartialAlias` case in `-aa-eval` - Removed VisitedPhiBBs check from BasicAA' Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D100454
49 lines
2.2 KiB
LLVM
49 lines
2.2 KiB
LLVM
; RUN: opt < %s -basic-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; RUN: opt < %s -basic-aa -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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%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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%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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