1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
| ; RUN: llc < %s -mtriple=arm-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-ARM
; RUN: llc < %s -mtriple=thumb-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-THUMB
; RUN: llc < %s -mtriple=armv6-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-ARMV6
; RUN: llc < %s -mtriple=thumbv6-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-THUMBV6
; RUN: llc < %s -mtriple=armv7-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-ARMV7
; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-THUMBV7
define zeroext i1 @test_cmpxchg_res_i8(i8* %addr, i8 %desired, i8 zeroext %new) {
entry:
%0 = cmpxchg i8* %addr, i8 %desired, i8 %new monotonic monotonic
%1 = extractvalue { i8, i1 } %0, 1
ret i1 %1
}
; CHECK-ARM-LABEL: test_cmpxchg_res_i8
; CHECK-ARM: bl __sync_val_compare_and_swap_1
; CHECK-ARM: sub r0, r0, {{r[0-9]+}}
; CHECK-ARM: rsbs [[REG:r[0-9]+]], r0, #0
; CHECK-ARM: adc r0, r0, [[REG]]
; CHECK-THUMB-LABEL: test_cmpxchg_res_i8
; CHECK-THUMB: bl __sync_val_compare_and_swap_1
; CHECK-THUMB-NOT: mov [[R1:r[0-7]]], r0
; CHECK-THUMB: subs [[R1:r[0-7]]], r0, {{r[0-9]+}}
; CHECK-THUMB: rsbs r0, [[R1]], #0
; CHECK-THUMB: adcs r0, [[R1]]
; CHECK-ARMV6-LABEL: test_cmpxchg_res_i8:
; CHECK-ARMV6-NEXT: .fnstart
; CHECK-ARMV6-NEXT: uxtb [[DESIRED:r[0-9]+]], r1
; CHECK-ARMV6-NEXT: [[TRY:.LBB[0-9_]+]]:
; CHECK-ARMV6-NEXT: ldrexb [[LD:r[0-9]+]], [r0]
; CHECK-ARMV6-NEXT: cmp [[LD]], [[DESIRED]]
; CHECK-ARMV6-NEXT: movne [[RES:r[0-9]+]], #0
; CHECK-ARMV6-NEXT: bxne lr
; CHECK-ARMV6-NEXT: strexb [[SUCCESS:r[0-9]+]], r2, [r0]
; CHECK-ARMV6-NEXT: cmp [[SUCCESS]], #0
; CHECK-ARMV6-NEXT: moveq [[RES]], #1
; CHECK-ARMV6-NEXT: bxeq lr
; CHECK-ARMV6-NEXT: b [[TRY]]
; CHECK-THUMBV6-LABEL: test_cmpxchg_res_i8:
; CHECK-THUMBV6: mov [[EXPECTED:r[0-9]+]], r1
; CHECK-THUMBV6-NEXT: bl __sync_val_compare_and_swap_1
; CHECK-THUMBV6-NEXT: uxtb r1, r4
; CHECK-THUMBV6-NEXT: subs [[R1:r[0-7]]], r0, {{r[0-9]+}}
; CHECK-THUMBV6-NEXT: rsbs r0, [[R1]], #0
; CHECK-THUMBV6-NEXT: adcs r0, [[R1]]
; CHECK-ARMV7-LABEL: test_cmpxchg_res_i8:
; CHECK-ARMV7-NEXT: .fnstart
; CHECK-ARMV7-NEXT: uxtb [[DESIRED:r[0-9]+]], r1
; CHECK-ARMV7-NEXT: [[TRY:.LBB[0-9_]+]]:
; CHECK-ARMV7-NEXT: ldrexb [[SUCCESS:r[0-9]+]], [r0]
; CHECK-ARMV7-NEXT: cmp [[SUCCESS]], r1
; CHECK-ARMV7-NEXT: bne [[EXIT:.LBB[0-9_]+]]
; CHECK-ARMV7-NEXT: strexb [[SUCCESS]], r2, [r0]
; CHECK-ARMV7-NEXT: cmp [[SUCCESS]], #0
; CHECK-ARMV7-NEXT: moveq r0, #1
; CHECK-ARMV7-NEXT: bxeq lr
; CHECK-ARMV7-NEXT: b [[TRY]]
; CHECK-ARMV7-NEXT: [[EXIT]]:
; CHECK-ARMV7-NEXT: mov r0, #0
; CHECK-ARMV7-NEXT: clrex
; CHECK-ARMV7-NEXT: bx lr
; CHECK-THUMBV7-LABEL: test_cmpxchg_res_i8:
; CHECK-THUMBV7-NEXT: .fnstart
; CHECK-THUMBV7-NEXT: uxtb [[DESIRED:r[0-9]+]], r1
; CHECK-THUMBV7-NEXT: [[TRYLD:.LBB[0-9_]+]]
; CHECK-THUMBV7-NEXT: ldrexb [[LD:r[0-9]+]], [r0]
; CHECK-THUMBV7-NEXT: cmp [[LD]], [[DESIRED]]
; CHECK-THUMBV7-NEXT: bne [[EXIT:.LBB[0-9_]+]]
; CHECK-THUMBV7-NEXT: strexb [[SUCCESS:r[0-9]+]], r2, [r0]
; CHECK-THUMBV7-NEXT: cmp [[SUCCESS]], #0
; CHECK-THUMBV7-NEXT: itt eq
; CHECK-THUMBV7-NEXT: moveq r0, #1
; CHECK-THUMBV7-NEXT: bxeq lr
; CHECK-THUMBV7-NEXT: b [[TRYLD]]
; CHECK-THUMBV7-NEXT: [[EXIT]]:
; CHECK-THUMBV7-NEXT: movs r0, #0
; CHECK-THUMBV7-NEXT: clrex
; CHECK-THUMBV7-NEXT: bx lr
|