1; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck -check-prefix=CHECK-NO-FP %s
2; RUN: llc < %s -mtriple=x86_64-apple-darwin -disable-fp-elim | FileCheck -check-prefix=CHECK-FP %s
3; RUN: llc < %s -mtriple=x86_64-linux-gnu | FileCheck -check-prefix=LINUX-NO-FP %s
4; RUN: llc < %s -mtriple=x86_64-linux-gnu -disable-fp-elim | FileCheck -check-prefix=LINUX-FP %s
5
6define void @func() {
7entry:
8  unreachable
9}
10
11; MachO cannot handle an empty function.
12; CHECK-NO-FP:     _func:
13; CHECK-NO-FP-NEXT: .cfi_startproc
14; CHECK-NO-FP:     nop
15; CHECK-NO-FP-NEXT: .cfi_endproc
16
17; CHECK-FP:      _func:
18; CHECK-FP-NEXT: .cfi_startproc
19; CHECK-FP-NEXT: :
20; CHECK-FP-NEXT: pushq %rbp
21; CHECK-FP-NEXT: :
22; CHECK-FP-NEXT: .cfi_def_cfa_offset 16
23; CHECK-FP-NEXT: :
24; CHECK-FP-NEXT: .cfi_offset %rbp, -16
25; CHECK-FP-NEXT: movq %rsp, %rbp
26; CHECK-FP-NEXT: :
27; CHECK-FP-NEXT: .cfi_def_cfa_register %rbp
28; CHECK-FP-NEXT: .cfi_endproc
29
30; An empty function is perfectly fine on ELF.
31; LINUX-NO-FP: func:
32; LINUX-NO-FP-NEXT: .cfi_startproc
33; LINUX-NO-FP-NEXT: {{^}}#
34; LINUX-NO-FP-NEXT: {{^}}.L{{.*}}:{{$}}
35; LINUX-NO-FP-NEXT: .size   func, .L{{.*}}-func
36; LINUX-NO-FP-NEXT: .cfi_endproc
37
38; A cfi directive can point to the end of a function. It (and in fact the
39; entire body) could be optimized out because of the unreachable, but we
40; don't do it right now.
41; LINUX-FP: func:
42; LINUX-FP-NEXT: .cfi_startproc
43; LINUX-FP-NEXT: {{^}}#
44; LINUX-FP-NEXT: pushq %rbp
45; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
46; LINUX-FP-NEXT:  .cfi_def_cfa_offset 16
47; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
48; LINUX-FP-NEXT: .cfi_offset %rbp, -16
49; LINUX-FP-NEXT: movq        %rsp, %rbp
50; LINUX-FP-NEXT:{{^}}.L{{.*}}:{{$}}
51; LINUX-FP-NEXT: .cfi_def_cfa_register %rbp
52; LINUX-FP-NEXT:{{^}}.L{{.*}}:{{$}}
53; LINUX-FP-NEXT: .size   func, .Lfunc_end0-func
54; LINUX-FP-NEXT: .cfi_endproc
55