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
|
# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \
# RUN: -stop-after=prologepilog | FileCheck %s
# Check that the callee-saved registers are saved starting with a STP
# with predecrement, followed by a separate stack adjustment later,
# if the optsize attribute is set.
# CHECK: early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -2
# CHECK-NEXT: frame-setup SEH_SaveRegP_X 19, 20, -16
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: frame-setup SEH_StackAlloc 16
# CHECK-NEXT: frame-setup SEH_PrologEnd
--- |
define dso_local i32 @func(i32 %a) optsize { ret i32 %a }
...
---
name: func
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers: []
liveins: []
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 4
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: default, offset: 0, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -4, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
callSites: []
constants: []
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x19, $x20
renamable $x8 = ADDXri %stack.0, 0, 0
$x19 = ADDXrr $x0, $x8
$x20 = ADDXrr $x19, $x0
$x0 = ADDXrr $x0, killed $x20
RET_ReallyLR
...
|
