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: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 29!1 = !DIFile(filename: "var.c", directory: "/tmp") 30!2 = !{} 31!3 = !{!4} 32!4 = distinct !DISubprogram(name: "sum", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !1, scope: !5, type: !6, variables: !2) 33!5 = !DIFile(filename: "var.c", directory: "/tmp") 34!6 = !DISubroutineType(types: !7) 35!7 = !{!8, !8} 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) 47!19 = !{!20} 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) 62 63; CHECK-FP-LABEL: sum 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 73 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 86 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 97 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, 20 110 111define i32 @sum(i32 %count, ...) !dbg !4 { 112entry: 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 118 119for.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 130 131for.end: ; preds = %for.body, %entry 132 call void @llvm.va_end(i8* %vl1) 133 ret i32 undef 134} 135 136declare void @llvm.va_start(i8*) nounwind 137 138declare i32 @foo(i32) 139 140declare void @llvm.va_end(i8*) nounwind 141