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comparison test/CodeGen/AArch64/arm64-extern-weak.ll @ 77:54457678186b LLVM3.6

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents
children 60c9769439b8
comparison
equal deleted inserted replaced
34:e874dbf0ad9d 77:54457678186b
1 ; RUN: llc -mtriple=arm64-none-linux-gnu -o - < %s | FileCheck %s
2 ; RUN: llc -mtriple=arm64-none-linux-gnu -code-model=large -o - < %s | FileCheck --check-prefix=CHECK-LARGE %s
3
4 declare extern_weak i32 @var()
5
6 define i32()* @foo() {
7 ; The usual ADRP/ADD pair can't be used for a weak reference because it must
8 ; evaluate to 0 if the symbol is undefined. We use a litpool entry.
9 ret i32()* @var
10
11 ; CHECK: adrp x[[VAR:[0-9]+]], :got:var
12 ; CHECK: ldr x0, [x[[VAR]], :got_lo12:var]
13
14 ; In the large model, the usual relocations are absolute and can
15 ; materialise 0.
16 ; CHECK-LARGE: movz x0, #:abs_g3:var
17 ; CHECK-LARGE: movk x0, #:abs_g2_nc:var
18 ; CHECK-LARGE: movk x0, #:abs_g1_nc:var
19 ; CHECK-LARGE: movk x0, #:abs_g0_nc:var
20 }
21
22
23 @arr_var = extern_weak global [10 x i32]
24
25 define i32* @bar() {
26 %addr = getelementptr [10 x i32]* @arr_var, i32 0, i32 5
27 ; CHECK: adrp x[[ARR_VAR_HI:[0-9]+]], :got:arr_var
28 ; CHECK: ldr [[ARR_VAR:x[0-9]+]], [x[[ARR_VAR_HI]], :got_lo12:arr_var]
29 ; CHECK: add x0, [[ARR_VAR]], #20
30 ret i32* %addr
31
32 ; In the large model, the usual relocations are absolute and can
33 ; materialise 0.
34 ; CHECK-LARGE: movz [[ARR_VAR:x[0-9]+]], #:abs_g3:arr_var
35 ; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g2_nc:arr_var
36 ; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g1_nc:arr_var
37 ; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g0_nc:arr_var
38 }
39
40 @defined_weak_var = internal unnamed_addr global i32 0
41
42 define i32* @wibble() {
43 ret i32* @defined_weak_var
44 ; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var
45 ; CHECK: add x0, [[BASE]], :lo12:defined_weak_var
46
47 ; CHECK-LARGE: movz x0, #:abs_g3:defined_weak_var
48 ; CHECK-LARGE: movk x0, #:abs_g2_nc:defined_weak_var
49 ; CHECK-LARGE: movk x0, #:abs_g1_nc:defined_weak_var
50 ; CHECK-LARGE: movk x0, #:abs_g0_nc:defined_weak_var
51 }