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 5 6 ; Tests that the initial space allocated to the varargs on the stack is 7 ; taken into account in the .cfi_ directives. 8 9 ; Generated from the C program: 10 ; #include <stdarg.h> 11 ; 12 ; extern int foo(int); 13 ; 14 ; int sum(int count, ...) { 15 ; va_list vl; 16 ; va_start(vl, count); 17 ; int sum = 0; 18 ; for (int i = 0; i < count; i++) { 19 ; sum += foo(va_arg(vl, int)); 20 ; } 21 ; va_end(vl); 22 ; } 23 24 !llvm.dbg.cu = !{!0} 25 !llvm.module.flags = !{!9, !10} 26 !llvm.ident = !{!11} 27 28 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 29 !1 = !DIFile(filename: "var.c", directory: "/tmp") 30 !2 = !{} 31 !4 = distinct !DISubprogram(name: "sum", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !6, variables: !2) 32 !5 = !DIFile(filename: "var.c", directory: "/tmp") 33 !6 = !DISubroutineType(types: !7) 34 !7 = !{!8, !8} 35 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 36 !9 = !{i32 2, !"Dwarf Version", i32 4} 37 !10 = !{i32 1, !"Debug Info Version", i32 3} 38 !11 = !{!"clang version 3.5 "} 39 !12 = !DILocalVariable(name: "count", line: 5, arg: 1, scope: !4, file: !5, type: !8) 40 !13 = !DILocation(line: 5, scope: !4) 41 !14 = !DILocalVariable(name: "vl", line: 6, scope: !4, file: !5, type: !15) 42 !15 = !DIDerivedType(tag: DW_TAG_typedef, name: "va_list", line: 30, file: !16, baseType: !17) 43 !16 = !DIFile(filename: "/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.5/include/stdarg.h", directory: "/tmp") 44 !17 = !DIDerivedType(tag: DW_TAG_typedef, name: "__builtin_va_list", line: 6, file: !1, baseType: !18) 45 !18 = !DICompositeType(tag: DW_TAG_structure_type, name: "__va_list", line: 6, size: 32, align: 32, file: !1, elements: !19) 46 !19 = !{!20} 47 !20 = !DIDerivedType(tag: DW_TAG_member, name: "__ap", line: 6, size: 32, align: 32, file: !1, scope: !18, baseType: !21) 48 !21 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: null) 49 !22 = !DILocation(line: 6, scope: !4) 50 !23 = !DILocation(line: 7, scope: !4) 51 !24 = !DILocalVariable(name: "sum", line: 8, scope: !4, file: !5, type: !8) 52 !25 = !DILocation(line: 8, scope: !4) 53 !26 = !DILocalVariable(name: "i", line: 9, scope: !27, file: !5, type: !8) 54 !27 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !4) 55 !28 = !DILocation(line: 9, scope: !27) 56 !29 = !DILocation(line: 10, scope: !30) 57 !30 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !27) 58 !31 = !DILocation(line: 11, scope: !30) 59 !32 = !DILocation(line: 12, scope: !4) 60 !33 = !DILocation(line: 13, scope: !4) 61 62 ; CHECK-FP-LABEL: sum 63 ; CHECK-FP: .cfi_startproc 64 ; CHECK-FP: sub sp, sp, #12 65 ; CHECK-FP: .cfi_def_cfa_offset 12 66 ; CHECK-FP: push {r4, lr} 67 ; CHECK-FP: .cfi_def_cfa_offset 20 68 ; CHECK-FP: .cfi_offset lr, -16 69 ; CHECK-FP: .cfi_offset r4, -20 70 ; CHECK-FP: sub sp, sp, #4 71 ; CHECK-FP: .cfi_def_cfa_offset 24 72 73 ; CHECK-FP-ELIM-LABEL: sum 74 ; CHECK-FP-ELIM: .cfi_startproc 75 ; CHECK-FP-ELIM: sub sp, sp, #12 76 ; CHECK-FP-ELIM: .cfi_def_cfa_offset 12 77 ; CHECK-FP-ELIM: push {r4, r10, r11, lr} 78 ; CHECK-FP-ELIM: .cfi_def_cfa_offset 28 79 ; CHECK-FP-ELIM: .cfi_offset lr, -16 80 ; CHECK-FP-ELIM: .cfi_offset r11, -20 81 ; CHECK-FP-ELIM: .cfi_offset r10, -24 82 ; CHECK-FP-ELIM: .cfi_offset r4, -28 83 ; CHECK-FP-ELIM: add r11, sp, #8 84 ; CHECK-FP-ELIM: .cfi_def_cfa r11, 20 85 86 ; CHECK-THUMB-FP-LABEL: sum 87 ; CHECK-THUMB-FP: .cfi_startproc 88 ; CHECK-THUMB-FP: sub sp, #12 89 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 12 90 ; CHECK-THUMB-FP: push {r4, lr} 91 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 20 92 ; CHECK-THUMB-FP: .cfi_offset lr, -16 93 ; CHECK-THUMB-FP: .cfi_offset r4, -20 94 ; CHECK-THUMB-FP: sub sp, #4 95 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 24 96 97 ; CHECK-THUMB-FP-ELIM-LABEL: sum 98 ; CHECK-THUMB-FP-ELIM: .cfi_startproc 99 ; CHECK-THUMB-FP-ELIM: sub sp, #12 100 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 12 101 ; CHECK-THUMB-FP-ELIM: push {r4, r6, r7, lr} 102 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 28 103 ; CHECK-THUMB-FP-ELIM: .cfi_offset lr, -16 104 ; CHECK-THUMB-FP-ELIM: .cfi_offset r7, -20 105 ; CHECK-THUMB-FP-ELIM: .cfi_offset r6, -24 106 ; CHECK-THUMB-FP-ELIM: .cfi_offset r4, -28 107 ; CHECK-THUMB-FP-ELIM: add r7, sp, #8 108 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa r7, 20 109 110 define i32 @sum(i32 %count, ...) !dbg !4 { 111 entry: 112 %vl = alloca i8*, align 4 113 %vl1 = bitcast i8** %vl to i8* 114 call void @llvm.va_start(i8* %vl1) 115 %cmp4 = icmp sgt i32 %count, 0 116 br i1 %cmp4, label %for.body, label %for.end 117 118 for.body: ; preds = %entry, %for.body 119 %i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ] 120 %ap.cur = load i8*, i8** %vl, align 4 121 %ap.next = getelementptr i8, i8* %ap.cur, i32 4 122 store i8* %ap.next, i8** %vl, align 4 123 %0 = bitcast i8* %ap.cur to i32* 124 %1 = load i32, i32* %0, align 4 125 %call = call i32 @foo(i32 %1) #1 126 %inc = add nsw i32 %i.05, 1 127 %exitcond = icmp eq i32 %inc, %count 128 br i1 %exitcond, label %for.end, label %for.body 129 130 for.end: ; preds = %for.body, %entry 131 call void @llvm.va_end(i8* %vl1) 132 ret i32 undef 133 } 134 135 declare void @llvm.va_start(i8*) nounwind 136 137 declare i32 @foo(i32) 138 139 declare void @llvm.va_end(i8*) nounwind 140
