6d30aa03a0
This adds an incomplete anders-style implementation for CFLAA. It's incomplete in that it's missing interprocedural analysis, attrs handling, etc. and that it needs more tests. More tests and features will be added in future commits. Patch by Jia Chen. Differential Revision: https://reviews.llvm.org/D22291 llvm-svn: 275602
35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; This testcase ensures that CFL AA handles assignment cycles correctly
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; RUN: opt < %s -disable-basicaa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; CHECK-LABEL: Function: test_cycle
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; CHECK: NoAlias: i64* %a, i64** %b
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; CHECK: NoAlias: i64* %a, i64*** %c
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; CHECK: NoAlias: i64** %b, i64*** %c
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; CHECK: NoAlias: i64* %a, i64**** %d
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; CHECK: NoAlias: i64** %b, i64**** %d
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; CHECK: NoAlias: i64*** %c, i64**** %d
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; CHECK: NoAlias: i64* %a, i64* %e
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; CHECK: NoAlias: i64* %e, i64** %b
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; CHECK: NoAlias: i64* %e, i64*** %c
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; CHECK: MayAlias: i64* %a, i64* %f
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; CHECK: NoAlias: i64* %f, i64** %b
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; CHECK: NoAlias: i64* %f, i64*** %c
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; CHECK: MayAlias: i64* %f, i64**** %d
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; CHECK: MayAlias: i64* %e, i64* %f
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define void @test_cycle() {
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%a = alloca i64, align 8
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%b = alloca i64*, align 8
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%c = alloca i64**, align 8
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%d = alloca i64***, align 8
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store i64* %a, i64** %b
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store i64** %b, i64*** %c
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store i64*** %c, i64**** %d
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%e = bitcast i64**** %d to i64*
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store i64* %e, i64** %b
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%f = load i64*, i64** %b
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ret void
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}
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