1 ; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype asm -o - %s | FileCheck %s --check-prefix=CHECK-FP
2 ; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype asm -o - %s -disable-fp-elim | FileCheck %s --check-prefix=CHECK-FP-ELIM
3 ; RUN: llc -mtriple thumb-unknown-linux-gnueabi -filetype asm -o - %s | FileCheck %s --check-prefix=CHECK-THUMB-FP
4 ; RUN: llc -mtriple thumb-unknown-linux-gnueabi -filetype asm -o - %s -disable-fp-elim | FileCheck %s --check-prefix=CHECK-THUMB-FP-ELIM
6 ; Tests that the initial space allocated to the varargs on the stack is
7 ; taken into account in the .cfi_ directives.
9 ; Generated from the C program:
12 ; extern int foo(int);
14 ; int sum(int count, ...) {
16 ; va_start(vl, count);
18 ; for (int i = 0; i < count; i++) {
19 ; sum += foo(va_arg(vl, int));
25 !llvm.module.flags = !{!9, !10}
28 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
29 !1 = !DIFile(filename: "var.c", directory: "/tmp")
32 !4 = !DISubprogram(name: "sum", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !1, scope: !5, type: !6, function: i32 (i32, ...)* @sum, variables: !2)
33 !5 = !DIFile(filename: "var.c", directory: "/tmp")
34 !6 = !DISubroutineType(types: !7)
36 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
37 !9 = !{i32 2, !"Dwarf Version", i32 4}
38 !10 = !{i32 1, !"Debug Info Version", i32 3}
39 !11 = !{!"clang version 3.5 "}
40 !12 = !DILocalVariable(name: "count", line: 5, arg: 1, scope: !4, file: !5, type: !8)
41 !13 = !DILocation(line: 5, scope: !4)
42 !14 = !DILocalVariable(name: "vl", line: 6, scope: !4, file: !5, type: !15)
43 !15 = !DIDerivedType(tag: DW_TAG_typedef, name: "va_list", line: 30, file: !16, baseType: !17)
44 !16 = !DIFile(filename: "/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.5/include/stdarg.h", directory: "/tmp")
45 !17 = !DIDerivedType(tag: DW_TAG_typedef, name: "__builtin_va_list", line: 6, file: !1, baseType: !18)
46 !18 = !DICompositeType(tag: DW_TAG_structure_type, name: "__va_list", line: 6, size: 32, align: 32, file: !1, elements: !19)
48 !20 = !DIDerivedType(tag: DW_TAG_member, name: "__ap", line: 6, size: 32, align: 32, file: !1, scope: !18, baseType: !21)
49 !21 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: null)
50 !22 = !DILocation(line: 6, scope: !4)
51 !23 = !DILocation(line: 7, scope: !4)
52 !24 = !DILocalVariable(name: "sum", line: 8, scope: !4, file: !5, type: !8)
53 !25 = !DILocation(line: 8, scope: !4)
54 !26 = !DILocalVariable(name: "i", line: 9, scope: !27, file: !5, type: !8)
55 !27 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !4)
56 !28 = !DILocation(line: 9, scope: !27)
57 !29 = !DILocation(line: 10, scope: !30)
58 !30 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !27)
59 !31 = !DILocation(line: 11, scope: !30)
60 !32 = !DILocation(line: 12, scope: !4)
61 !33 = !DILocation(line: 13, scope: !4)
64 ; CHECK-FP: .cfi_startproc
65 ; CHECK-FP: sub sp, sp, #12
66 ; CHECK-FP: .cfi_def_cfa_offset 12
67 ; CHECK-FP: push {r4, lr}
68 ; CHECK-FP: .cfi_def_cfa_offset 20
69 ; CHECK-FP: .cfi_offset lr, -16
70 ; CHECK-FP: .cfi_offset r4, -20
71 ; CHECK-FP: sub sp, sp, #4
72 ; CHECK-FP: .cfi_def_cfa_offset 24
74 ; CHECK-FP-ELIM-LABEL: sum
75 ; CHECK-FP-ELIM: .cfi_startproc
76 ; CHECK-FP-ELIM: sub sp, sp, #12
77 ; CHECK-FP-ELIM: .cfi_def_cfa_offset 12
78 ; CHECK-FP-ELIM: push {r4, r10, r11, lr}
79 ; CHECK-FP-ELIM: .cfi_def_cfa_offset 28
80 ; CHECK-FP-ELIM: .cfi_offset lr, -16
81 ; CHECK-FP-ELIM: .cfi_offset r11, -20
82 ; CHECK-FP-ELIM: .cfi_offset r10, -24
83 ; CHECK-FP-ELIM: .cfi_offset r4, -28
84 ; CHECK-FP-ELIM: add r11, sp, #8
85 ; CHECK-FP-ELIM: .cfi_def_cfa r11, 20
87 ; CHECK-THUMB-FP-LABEL: sum
88 ; CHECK-THUMB-FP: .cfi_startproc
89 ; CHECK-THUMB-FP: sub sp, #12
90 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 12
91 ; CHECK-THUMB-FP: push {r4, lr}
92 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 20
93 ; CHECK-THUMB-FP: .cfi_offset lr, -16
94 ; CHECK-THUMB-FP: .cfi_offset r4, -20
95 ; CHECK-THUMB-FP: sub sp, #4
96 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 24
98 ; CHECK-THUMB-FP-ELIM-LABEL: sum
99 ; CHECK-THUMB-FP-ELIM: .cfi_startproc
100 ; CHECK-THUMB-FP-ELIM: sub sp, #12
101 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 12
102 ; CHECK-THUMB-FP-ELIM: push {r4, r6, r7, lr}
103 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 28
104 ; CHECK-THUMB-FP-ELIM: .cfi_offset lr, -16
105 ; CHECK-THUMB-FP-ELIM: .cfi_offset r7, -20
106 ; CHECK-THUMB-FP-ELIM: .cfi_offset r6, -24
107 ; CHECK-THUMB-FP-ELIM: .cfi_offset r4, -28
108 ; CHECK-THUMB-FP-ELIM: add r7, sp, #8
109 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa r7, 20
111 define i32 @sum(i32 %count, ...) {
113 %vl = alloca i8*, align 4
114 %vl1 = bitcast i8** %vl to i8*
115 call void @llvm.va_start(i8* %vl1)
116 %cmp4 = icmp sgt i32 %count, 0
117 br i1 %cmp4, label %for.body, label %for.end
119 for.body: ; preds = %entry, %for.body
120 %i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
121 %ap.cur = load i8*, i8** %vl, align 4
122 %ap.next = getelementptr i8, i8* %ap.cur, i32 4
123 store i8* %ap.next, i8** %vl, align 4
124 %0 = bitcast i8* %ap.cur to i32*
125 %1 = load i32, i32* %0, align 4
126 %call = call i32 @foo(i32 %1) #1
127 %inc = add nsw i32 %i.05, 1
128 %exitcond = icmp eq i32 %inc, %count
129 br i1 %exitcond, label %for.end, label %for.body
131 for.end: ; preds = %for.body, %entry
132 call void @llvm.va_end(i8* %vl1)
136 declare void @llvm.va_start(i8*) nounwind
138 declare i32 @foo(i32)
140 declare void @llvm.va_end(i8*) nounwind