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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype asm -o - %s | FileCheck %s --check-prefix=CHECK-FP
; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype asm -o - %s -disable-fp-elim | FileCheck %s --check-prefix=CHECK-FP-ELIM
; RUN: llc -mtriple thumb-unknown-linux-gnueabi -filetype asm -o - %s | FileCheck %s --check-prefix=CHECK-THUMB-FP
; RUN: llc -mtriple thumb-unknown-linux-gnueabi -filetype asm -o - %s -disable-fp-elim | FileCheck %s --check-prefix=CHECK-THUMB-FP-ELIM
; Tests that the initial space allocated to the varargs on the stack is
; taken into account in the the .cfi_ directives.
; Generated from the C program:
; #include <stdarg.h>
;
; extern int foo(int);
;
; int sum(int count, ...) {
; va_list vl;
; va_start(vl, count);
; int sum = 0;
; for (int i = 0; i < count; i++) {
; sum += foo(va_arg(vl, int));
; }
; va_end(vl);
; }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!9, !10}
!llvm.ident = !{!11}
!0 = metadata !{metadata !"0x11\0012\00clang version 3.5 \000\00\000\00\000", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [/tmp/var.c] [DW_LANG_C99]
!1 = metadata !{metadata !"var.c", metadata !"/tmp"}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !"0x2e\00sum\00sum\00\005\000\001\000\006\00256\000\005", metadata !1, metadata !5, metadata !6, null, i32 (i32, ...)* @sum, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 5] [def] [sum]
!5 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [/tmp/var.c]
!6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{metadata !8, metadata !8}
!8 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!9 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!10 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
!11 = metadata !{metadata !"clang version 3.5 "}
!12 = metadata !{metadata !"0x101\00count\0016777221\000", metadata !4, metadata !5, metadata !8} ; [ DW_TAG_arg_variable ] [count] [line 5]
!13 = metadata !{i32 5, i32 0, metadata !4, null}
!14 = metadata !{metadata !"0x100\00vl\006\000", metadata !4, metadata !5, metadata !15} ; [ DW_TAG_auto_variable ] [vl] [line 6]
!15 = metadata !{metadata !"0x16\00va_list\0030\000\000\000\000", metadata !16, null, metadata !17} ; [ DW_TAG_typedef ] [va_list] [line 30, size 0, align 0, offset 0] [from __builtin_va_list]
!16 = metadata !{metadata !"/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.5/include/stdarg.h", metadata !"/tmp"}
!17 = metadata !{metadata !"0x16\00__builtin_va_list\006\000\000\000\000", metadata !1, null, metadata !18} ; [ DW_TAG_typedef ] [__builtin_va_list] [line 6, size 0, align 0, offset 0] [from __va_list]
!18 = metadata !{metadata !"0x13\00__va_list\006\0032\0032\000\000\000", metadata !1, null, null, metadata !19, null, null, null} ; [ DW_TAG_structure_type ] [__va_list] [line 6, size 32, align 32, offset 0] [def] [from ]
!19 = metadata !{metadata !20}
!20 = metadata !{metadata !"0xd\00__ap\006\0032\0032\000\000", metadata !1, metadata !18, metadata !21} ; [ DW_TAG_member ] [__ap] [line 6, size 32, align 32, offset 0] [from ]
!21 = metadata !{metadata !"0xf\00\000\0032\0032\000\000", null, null, null} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from ]
!22 = metadata !{i32 6, i32 0, metadata !4, null}
!23 = metadata !{i32 7, i32 0, metadata !4, null}
!24 = metadata !{metadata !"0x100\00sum\008\000", metadata !4, metadata !5, metadata !8} ; [ DW_TAG_auto_variable ] [sum] [line 8]
!25 = metadata !{i32 8, i32 0, metadata !4, null}
!26 = metadata !{metadata !"0x100\00i\009\000", metadata !27, metadata !5, metadata !8} ; [ DW_TAG_auto_variable ] [i] [line 9]
!27 = metadata !{metadata !"0xb\009\000\000", metadata !1, metadata !4} ; [ DW_TAG_lexical_block ] [/tmp/var.c]
!28 = metadata !{i32 9, i32 0, metadata !27, null}
!29 = metadata !{i32 10, i32 0, metadata !30, null}
!30 = metadata !{metadata !"0xb\009\000\001", metadata !1, metadata !27} ; [ DW_TAG_lexical_block ] [/tmp/var.c]
!31 = metadata !{i32 11, i32 0, metadata !30, null}
!32 = metadata !{i32 12, i32 0, metadata !4, null}
!33 = metadata !{i32 13, i32 0, metadata !4, null}
; CHECK-FP-LABEL: sum
; CHECK-FP: .cfi_startproc
; CHECK-FP: sub sp, sp, #16
; CHECK-FP: .cfi_def_cfa_offset 16
; CHECK-FP: push {r4, lr}
; CHECK-FP: .cfi_def_cfa_offset 24
; CHECK-FP: .cfi_offset lr, -20
; CHECK-FP: .cfi_offset r4, -24
; CHECK-FP: sub sp, sp, #8
; CHECK-FP: .cfi_def_cfa_offset 32
; CHECK-FP-ELIM-LABEL: sum
; CHECK-FP-ELIM: .cfi_startproc
; CHECK-FP-ELIM: sub sp, sp, #16
; CHECK-FP-ELIM: .cfi_def_cfa_offset 16
; CHECK-FP-ELIM: push {r4, r10, r11, lr}
; CHECK-FP-ELIM: .cfi_def_cfa_offset 32
; CHECK-FP-ELIM: .cfi_offset lr, -20
; CHECK-FP-ELIM: .cfi_offset r11, -24
; CHECK-FP-ELIM: .cfi_offset r10, -28
; CHECK-FP-ELIM: .cfi_offset r4, -32
; CHECK-FP-ELIM: add r11, sp, #8
; CHECK-FP-ELIM: .cfi_def_cfa r11, 24
; CHECK-THUMB-FP-LABEL: sum
; CHECK-THUMB-FP: .cfi_startproc
; CHECK-THUMB-FP: sub sp, #16
; CHECK-THUMB-FP: .cfi_def_cfa_offset 16
; CHECK-THUMB-FP: push {r4, r5, r7, lr}
; CHECK-THUMB-FP: .cfi_def_cfa_offset 32
; CHECK-THUMB-FP: .cfi_offset lr, -20
; CHECK-THUMB-FP: .cfi_offset r7, -24
; CHECK-THUMB-FP: .cfi_offset r5, -28
; CHECK-THUMB-FP: .cfi_offset r4, -32
; CHECK-THUMB-FP: sub sp, #8
; CHECK-THUMB-FP: .cfi_def_cfa_offset 40
; CHECK-THUMB-FP-ELIM-LABEL: sum
; CHECK-THUMB-FP-ELIM: .cfi_startproc
; CHECK-THUMB-FP-ELIM: sub sp, #16
; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 16
; CHECK-THUMB-FP-ELIM: push {r4, r5, r7, lr}
; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 32
; CHECK-THUMB-FP-ELIM: .cfi_offset lr, -20
; CHECK-THUMB-FP-ELIM: .cfi_offset r7, -24
; CHECK-THUMB-FP-ELIM: .cfi_offset r5, -28
; CHECK-THUMB-FP-ELIM: .cfi_offset r4, -32
; CHECK-THUMB-FP-ELIM: add r7, sp, #8
; CHECK-THUMB-FP-ELIM: .cfi_def_cfa r7, 24
define i32 @sum(i32 %count, ...) {
entry:
%vl = alloca i8*, align 4
%vl1 = bitcast i8** %vl to i8*
call void @llvm.va_start(i8* %vl1)
%cmp4 = icmp sgt i32 %count, 0
br i1 %cmp4, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
%ap.cur = load i8** %vl, align 4
%ap.next = getelementptr i8* %ap.cur, i32 4
store i8* %ap.next, i8** %vl, align 4
%0 = bitcast i8* %ap.cur to i32*
%1 = load i32* %0, align 4
%call = call i32 @foo(i32 %1) #1
%inc = add nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, %count
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
call void @llvm.va_end(i8* %vl1)
ret i32 undef
}
declare void @llvm.va_start(i8*) nounwind
declare i32 @foo(i32)
declare void @llvm.va_end(i8*) nounwind
|
