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1# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o - %s | FileCheck %s
2# This test ensures that the MIR parser parses the stack protector stack
3# object reference in the machine frame info correctly.
4
5--- |
6  @.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1
7  @__stack_chk_guard = external global i8*
8
9  define i32 @test() #0 {
10  entry:
11    %StackGuardSlot = alloca i8*
12    %StackGuard = load i8*, i8** @__stack_chk_guard
13    call void @llvm.stackprotector(i8* %StackGuard, i8** %StackGuardSlot)
14    %test = alloca i8*, align 8
15    %a = alloca i8, i64 5
16    store i8* %a, i8** %test, align 8
17    %b = load i8*, i8** %test, align 8
18    %call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i8* %b)
19    call void @llvm.stackprotectorcheck(i8** @__stack_chk_guard)
20    ret i32 %call
21  }
22
23  declare i32 @printf(i8*, ...)
24
25  declare void @llvm.stackprotector(i8*, i8**) #1
26
27  declare void @llvm.stackprotectorcheck(i8**) #2
28
29  attributes #0 = { ssp "stack-protector-buffer-size"="5" }
30  attributes #1 = { nounwind }
31  attributes #2 = { nounwind argmemonly }
32...
33---
34name:            test
35alignment:       4
36tracksRegLiveness: true
37frameInfo:
38  stackSize:       40
39  maxAlignment:    8
40  adjustsStack:    true
41  hasCalls:        true
42# CHECK-LABEL: name: test
43# CHECK: frameInfo
44# CHECK: stackProtector: '%stack.0.StackGuardSlot'
45  stackProtector:  '%stack.0.StackGuardSlot'
46fixedStack:
47  - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16,
48      callee-saved-register: '%rbx' }
49stack:
50  - { id: 0, name: StackGuardSlot, offset: -24, size: 8, alignment: 8 }
51  - { id: 1, name: test, offset: -40, size: 8, alignment: 8 }
52  - { id: 2, name: a, offset: -29, size: 5, alignment: 1 }
53body: |
54  bb.0.entry:
55    successors: %bb.1.entry, %bb.2.entry
56    liveins: %rbx, %rbx
57
58    frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp
59    %rsp = frame-setup SUB64ri8 %rsp, 32, implicit-def dead %eflags
60    %rbx = LOAD_STACK_GUARD :: (invariant load 8 from @__stack_chk_guard)
61    MOV64mr %rsp, 1, _, 24, _, %rbx
62    %rsi = LEA64r %rsp, 1, _, 19, _
63    MOV64mr %rsp, 1, _, 8, _, %rsi
64    %rdi = LEA64r %rip, 1, _, @.str, _
65    dead %eax = MOV32r0 implicit-def dead %eflags, implicit-def %al
66    CALL64pcrel32 @printf, csr_64, implicit %rsp, implicit %rdi, implicit %rsi, implicit %al, implicit-def %rsp, implicit-def %eax
67    CMP64rm killed %rbx, %rsp, 1, _, 24, _, implicit-def %eflags
68    JNE_1 %bb.2.entry, implicit %eflags
69
70  bb.1.entry:
71    liveins: %eax
72
73    %rsp = ADD64ri8 %rsp, 32, implicit-def dead %eflags
74    %rbx = POP64r implicit-def %rsp, implicit %rsp
75    RETQ %eax
76
77  bb.2.entry:
78    CALL64pcrel32 $__stack_chk_fail, csr_64, implicit %rsp, implicit-def %rsp
79...
80