1 ; RUN: llc -mtriple=thumbv7-apple-ios8.0 %s -o - | FileCheck %s
3 ; This checks that alignments greater than 4 are respected by APCS
4 ; targets. Mostly here to make sure *some* correct code is created after some
5 ; simplifying refactoring; at the time of writing there were no actual APCS
6 ; users of byval alignments > 4, so no real calls for ABI stability.
8 ; "byval align 16" can't fit in any regs with an i8* taking up r0.
9 define i32 @test_align16(i8*, [4 x i32]* byval align 16 %b) {
10 ; CHECK-LABEL: test_align16:
12 ; CHECK: push {r4, r7, lr}
13 ; CHECK: add r7, sp, #4
15 ; CHECK: ldr r0, [r7, #8]
18 %valptr = getelementptr [4 x i32], [4 x i32]* %b, i32 0, i32 0
19 %val = load i32, i32* %valptr
23 ; byval align 8 can, but we used to incorrectly set r7 here (miscalculating the
24 ; space taken up by arg regs).
25 define i32 @test_align8(i8*, [4 x i32]* byval align 8 %b) {
26 ; CHECK-LABEL: test_align8:
28 ; CHECK: push {r4, r7, lr}
29 ; CHECK: add r7, sp, #4
31 ; CHECK-DAG: str r2, [r7, #8]
32 ; CHECK-DAG: str r3, [r7, #12]
34 ; CHECK: ldr r0, [r7, #8]
37 %valptr = getelementptr [4 x i32], [4 x i32]* %b, i32 0, i32 0
38 %val = load i32, i32* %valptr
42 ; "byval align 32" can't fit in regs no matter what: it would be misaligned
43 ; unless the incoming stack was deliberately misaligned.
44 define i32 @test_align32(i8*, [4 x i32]* byval align 32 %b) {
45 ; CHECK-LABEL: test_align32:
47 ; CHECK: push {r4, r7, lr}
48 ; CHECK: add r7, sp, #4
50 ; CHECK: ldr r0, [r7, #8]
53 %valptr = getelementptr [4 x i32], [4 x i32]* %b, i32 0, i32 0
54 %val = load i32, i32* %valptr
58 ; When passing an object "byval align N", the stack must be at least N-aligned.
59 define void @test_call_align16() {
60 ; CHECK-LABEL: test_call_align16:
61 ; CHECK: push {r4, r7, lr}
62 ; CHECK: add r7, sp, #4
64 ; CHECK: mov [[TMP:r[0-9]+]], sp
65 ; CHECK: bfc [[TMP]], #0, #4
66 ; CHECK: mov sp, [[TMP]]
68 ; While we're here, make sure the caller also puts it at sp
69 ; CHECK: mov r[[BASE:[0-9]+]], sp
70 ; CHECK: vst1.32 {d{{[0-9]+}}, d{{[0-9]+}}}, [r[[BASE]]]
71 call i32 @test_align16(i8* null, [4 x i32]* byval align 16 @var)
75 @var = global [4 x i32] zeroinitializer