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.
66 lines
2.0 KiB
LLVM
66 lines
2.0 KiB
LLVM
; This testcase consists of alias relations which should be completely
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; resolvable by cfl-steens-aa, but require analysis of getelementptr constant exprs.
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; Derived from BasicAA/2003-12-11-ConstExprGEP.ll
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; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-may-aliases -disable-output 2>&1 | FileCheck %s
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%T = type { i32, [10 x i8] }
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@G = external global %T
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@G2 = external global %T
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; TODO: Quite a few of these are MayAlias because we don't yet consider
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; constant offsets in CFLSteensAA. If we start doing so, then we'll need to
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; change these test cases
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; CHECK: Function: test
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; CHECK: MayAlias: i32* %D, i32* %F
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; CHECK: MayAlias: i32* %D, i8* %X
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; CHECK: MayAlias: i32* %F, i8* %X
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define void @test() {
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%D = getelementptr %T, %T* @G, i64 0, i32 0
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%F = getelementptr i32, i32* getelementptr (%T, %T* @G, i64 0, i32 0), i64 0
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%X = getelementptr [10 x i8], [10 x i8]* getelementptr (%T, %T* @G, i64 0, i32 1), i64 0, i64 5
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load i32, i32* %D
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load i32, i32* %F
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load i8, i8* %X
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ret void
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}
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; CHECK: Function: simplecheck
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; CHECK: MayAlias: i32* %F, i32* %arg0
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; CHECK: MayAlias: i32* %H, i32* %arg0
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; CHECK: MayAlias: i32* %F, i32* %H
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define void @simplecheck(i32* %arg0) {
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%F = getelementptr i32, i32* getelementptr (%T, %T* @G, i64 0, i32 0), i64 0
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%H = getelementptr %T, %T* @G2, i64 0, i32 0
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load i32, i32* %arg0
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load i32, i32* %F
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load i32, i32* %H
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ret void
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}
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; Ensure that CFLSteensAA properly identifies and handles escaping variables (i.e.
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; globals) in nested ConstantExprs
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; CHECK: Function: checkNesting
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; CHECK: MayAlias: i32* %A, i32* %arg0
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%NestedT = type { [1 x [1 x i32]] }
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@NT = external global %NestedT
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define void @checkNesting(i32* %arg0) {
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%A = getelementptr [1 x i32],
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[1 x i32]* getelementptr
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([1 x [1 x i32]], [1 x [1 x i32]]* getelementptr (%NestedT, %NestedT* @NT, i64 0, i32 0),
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i64 0,
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i32 0),
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i64 0,
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i32 0
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load i32, i32* %arg0
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load i32, i32* %A
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ret void
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}
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