1 ; RUN: llc -mtriple=aarch64-none-linux-gnu -verify-machineinstrs < %s | FileCheck %s
3 @var32 = global [3 x i32] zeroinitializer
4 @var64 = global [3 x i64] zeroinitializer
5 @var32_align64 = global [3 x i32] zeroinitializer, align 8
7 define i64 @test_align32() {
8 ; CHECK-LABEL: test_align32:
9 %addr = bitcast [3 x i32]* @var32 to i64*
11 ; Since @var32 is only guaranteed to be aligned to 32-bits, it's invalid to
12 ; emit an "LDR x0, [x0, #:lo12:var32] instruction to implement this load.
13 %val = load i64* %addr
14 ; CHECK: adrp [[HIBITS:x[0-9]+]], var32
15 ; CHECK: add x[[ADDR:[0-9]+]], [[HIBITS]], #:lo12:var32
16 ; CHECK: ldr x0, [x[[ADDR]]]
21 define i64 @test_align64() {
22 ; CHECK-LABEL: test_align64:
23 %addr = bitcast [3 x i64]* @var64 to i64*
25 ; However, var64 *is* properly aligned and emitting an adrp/add/ldr would be
27 %val = load i64* %addr
28 ; CHECK: adrp x[[HIBITS:[0-9]+]], var64
29 ; CHECK-NOT: add x[[HIBITS]]
30 ; CHECK: ldr x0, [x[[HIBITS]], #:lo12:var64]
35 define i64 @test_var32_align64() {
36 ; CHECK-LABEL: test_var32_align64:
37 %addr = bitcast [3 x i32]* @var32_align64 to i64*
39 ; Since @var32 is only guaranteed to be aligned to 32-bits, it's invalid to
40 ; emit an "LDR x0, [x0, #:lo12:var32] instruction to implement this load.
41 %val = load i64* %addr
42 ; CHECK: adrp x[[HIBITS:[0-9]+]], var32_align64
43 ; CHECK-NOT: add x[[HIBITS]]
44 ; CHECK: ldr x0, [x[[HIBITS]], #:lo12:var32_align64]
49 @yet_another_var = external global {i32, i32}
51 define i64 @test_yet_another_var() {
52 ; CHECK-LABEL: test_yet_another_var:
54 ; @yet_another_var has a preferred alignment of 8, but that's not enough if
55 ; we're going to be linking against other things. Its ABI alignment is only 4
56 ; so we can't fold the load.
57 %val = load i64* bitcast({i32, i32}* @yet_another_var to i64*)
58 ; CHECK: adrp [[HIBITS:x[0-9]+]], yet_another_var
59 ; CHECK: add x[[ADDR:[0-9]+]], [[HIBITS]], #:lo12:yet_another_var
60 ; CHECK: ldr x0, [x[[ADDR]]]
64 define i64()* @test_functions() {
65 ; CHECK-LABEL: test_functions:
66 ret i64()* @test_yet_another_var
67 ; CHECK: adrp [[HIBITS:x[0-9]+]], test_yet_another_var
68 ; CHECK: add x0, [[HIBITS]], #:lo12:test_yet_another_var