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