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1# RUN: llc -march=x86-64 -start-after prologepilog -stop-after prologepilog -o - %s | FileCheck %s
2# This test ensures that the MIR parser parses callee saved information in the
3# stack objects correctly.
4
5--- |
6
7  define i32 @compute(i32 %a) {
8  body:
9    ret i32 %a
10  }
11
12  define i32 @func(i32 %a) {
13  entry:
14    %b = alloca i32
15    store i32 %a, i32* %b
16    br label %check
17
18  check:
19    %comp = icmp sle i32 %a, 10
20    br i1 %comp, label %loop, label %exit
21
22  loop:
23    %c = load i32, i32* %b
24    %d = call i32 @compute(i32 %c)
25    %e = sub i32 %d, 1
26    store i32 %e, i32* %b
27    br label %check
28
29  exit:
30    ret i32 0
31  }
32
33...
34---
35name:            compute
36tracksRegLiveness: true
37body: |
38  bb.0.body:
39    liveins: %edi
40
41    %eax = COPY killed %edi
42    RETQ killed %eax
43...
44---
45name:            func
46tracksRegLiveness: true
47frameInfo:
48  stackSize:       24
49  maxAlignment:    4
50  adjustsStack:    true
51  hasCalls:        true
52# CHECK: fixedStack:
53# CHECK-NEXT: , callee-saved-register: '%rbx' }
54fixedStack:
55  - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '%rbx' }
56# CHECK: stack:
57# CHECK-NEXT: - { id: 0
58# CHECK-NEXT: , callee-saved-register: '%edi' }
59stack:
60  - { id: 0, name: b, offset: -20, size: 4, alignment: 4 }
61  - { id: 1, offset: -24, size: 4, alignment: 4, callee-saved-register: '%edi' }
62body: |
63  bb.0.entry:
64    successors: %bb.1.check
65    liveins: %edi, %rbx
66
67    frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp
68    %rsp = frame-setup SUB64ri8 %rsp, 16, implicit-def dead %eflags
69    %ebx = COPY %edi
70    MOV32mr %rsp, 1, _, 12, _, %ebx
71
72  bb.1.check:
73    successors: %bb.2.loop, %bb.3.exit
74    liveins: %ebx
75
76    CMP32ri8 %ebx, 10, implicit-def %eflags
77    JG_1 %bb.3.exit, implicit killed %eflags
78    JMP_1 %bb.2.loop
79
80  bb.2.loop:
81    successors: %bb.1.check
82    liveins: %ebx
83
84    %edi = MOV32rm %rsp, 1, _, 12, _
85    CALL64pcrel32 @compute, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax
86    %eax = DEC32r killed %eax, implicit-def dead %eflags
87    MOV32mr %rsp, 1, _, 12, _, killed %eax
88    JMP_1 %bb.1.check
89
90  bb.3.exit:
91    %eax = MOV32r0 implicit-def dead %eflags
92    %rsp = ADD64ri8 %rsp, 16, implicit-def dead %eflags
93    %rbx = POP64r implicit-def %rsp, implicit %rsp
94    RETQ %eax
95...
96