128-bit-ptr.ll
2.19 KB
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; This testcase consists of alias relations on 128-bit pointers that
; should be completely resolvable by basicaa.
; RUN: opt < %s -basic-aa -aa-eval -print-no-aliases -print-may-aliases -print-must-aliases -disable-output 2>&1 | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-i128:128:128-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128-p100:128:64:64-p101:128:64:64"
; test0 is similar to SimpleCases.ll
%T = type { i32, [10 x i8] }
; CHECK: Function: test0
; CHECK-NOT: MayAlias:
define void @test0(%T addrspace(100)* %P) {
%A = getelementptr %T, %T addrspace(100)* %P, i64 0
%B = getelementptr %T, %T addrspace(100)* %P, i64 0, i32 0
%C = getelementptr %T, %T addrspace(100)* %P, i64 0, i32 1
%D = getelementptr %T, %T addrspace(100)* %P, i64 0, i32 1, i64 0
%E = getelementptr %T, %T addrspace(100)* %P, i64 0, i32 1, i64 5
ret void
}
; test1 checks that >64 bits of index can be considered.
; If BasicAA is truncating the arithmetic, it will conclude
; that %A and %B must alias when in fact they must not.
; CHECK: Function: test1
; CHECK-NOT: MustAlias:
; CHECK: NoAlias:
; CHECK-SAME: %A
; CHECK-SAME: %B
define void @test1(double addrspace(100)* %P, i128 %i) {
; 1180591620717411303424 is 2**70
; 590295810358705651712 is 2**69
%i70 = add i128 %i, 1180591620717411303424
%i69 = add i128 %i, 590295810358705651712
%A = getelementptr double, double addrspace(100)* %P, i128 %i70
%B = getelementptr double, double addrspace(100)* %P, i128 %i69
ret void
}
; test2 checks that >64 bits of index can be considered
; and computes the same address in two ways to ensure that
; they are considered equivalent.
; CHECK: Function: test2
; CHECK: MustAlias:
; CHECK-SAME: %A
; CHECK-SAME: %C
define void @test2(double addrspace(100)* %P, i128 %i) {
; 1180591620717411303424 is 2**70
; 590295810358705651712 is 2**69
%i70 = add i128 %i, 1180591620717411303424
%i69 = add i128 %i, 590295810358705651712
%j70 = add i128 %i69, 590295810358705651712
%A = getelementptr double, double addrspace(100)* %P, i128 %i70
%C = getelementptr double, double addrspace(100)* %P, i128 %j70
ret void
}