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 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 = !{!"0x11\0012\00clang version 3.5 \000\00\000\00\000", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/var.c] [DW_LANG_C99] 29!1 = !{!"var.c", !"/tmp"} 30!2 = !{} 31!3 = !{!4} 32!4 = !{!"0x2e\00sum\00sum\00\005\000\001\000\006\00256\000\005", !1, !5, !6, null, i32 (i32, ...)* @sum, null, null, !2} ; [ DW_TAG_subprogram ] [line 5] [def] [sum] 33!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/var.c] 34!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 35!7 = !{!8, !8} 36!8 = !{!"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] 37!9 = !{i32 2, !"Dwarf Version", i32 4} 38!10 = !{i32 1, !"Debug Info Version", i32 2} 39!11 = !{!"clang version 3.5 "} 40!12 = !{!"0x101\00count\0016777221\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [count] [line 5] 41!13 = !MDLocation(line: 5, scope: !4) 42!14 = !{!"0x100\00vl\006\000", !4, !5, !15} ; [ DW_TAG_auto_variable ] [vl] [line 6] 43!15 = !{!"0x16\00va_list\0030\000\000\000\000", !16, null, !17} ; [ DW_TAG_typedef ] [va_list] [line 30, size 0, align 0, offset 0] [from __builtin_va_list] 44!16 = !{!"/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.5/include/stdarg.h", !"/tmp"} 45!17 = !{!"0x16\00__builtin_va_list\006\000\000\000\000", !1, null, !18} ; [ DW_TAG_typedef ] [__builtin_va_list] [line 6, size 0, align 0, offset 0] [from __va_list] 46!18 = !{!"0x13\00__va_list\006\0032\0032\000\000\000", !1, null, null, !19, null, null, null} ; [ DW_TAG_structure_type ] [__va_list] [line 6, size 32, align 32, offset 0] [def] [from ] 47!19 = !{!20} 48!20 = !{!"0xd\00__ap\006\0032\0032\000\000", !1, !18, !21} ; [ DW_TAG_member ] [__ap] [line 6, size 32, align 32, offset 0] [from ] 49!21 = !{!"0xf\00\000\0032\0032\000\000", null, null, null} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from ] 50!22 = !MDLocation(line: 6, scope: !4) 51!23 = !MDLocation(line: 7, scope: !4) 52!24 = !{!"0x100\00sum\008\000", !4, !5, !8} ; [ DW_TAG_auto_variable ] [sum] [line 8] 53!25 = !MDLocation(line: 8, scope: !4) 54!26 = !{!"0x100\00i\009\000", !27, !5, !8} ; [ DW_TAG_auto_variable ] [i] [line 9] 55!27 = !{!"0xb\009\000\000", !1, !4} ; [ DW_TAG_lexical_block ] [/tmp/var.c] 56!28 = !MDLocation(line: 9, scope: !27) 57!29 = !MDLocation(line: 10, scope: !30) 58!30 = !{!"0xb\009\000\001", !1, !27} ; [ DW_TAG_lexical_block ] [/tmp/var.c] 59!31 = !MDLocation(line: 11, scope: !30) 60!32 = !MDLocation(line: 12, scope: !4) 61!33 = !MDLocation(line: 13, scope: !4) 62 63; CHECK-FP-LABEL: sum 64; CHECK-FP: .cfi_startproc 65; CHECK-FP: sub sp, sp, #16 66; CHECK-FP: .cfi_def_cfa_offset 16 67; CHECK-FP: push {r4, lr} 68; CHECK-FP: .cfi_def_cfa_offset 24 69; CHECK-FP: .cfi_offset lr, -20 70; CHECK-FP: .cfi_offset r4, -24 71; CHECK-FP: sub sp, sp, #8 72; CHECK-FP: .cfi_def_cfa_offset 32 73 74; CHECK-FP-ELIM-LABEL: sum 75; CHECK-FP-ELIM: .cfi_startproc 76; CHECK-FP-ELIM: sub sp, sp, #16 77; CHECK-FP-ELIM: .cfi_def_cfa_offset 16 78; CHECK-FP-ELIM: push {r4, r10, r11, lr} 79; CHECK-FP-ELIM: .cfi_def_cfa_offset 32 80; CHECK-FP-ELIM: .cfi_offset lr, -20 81; CHECK-FP-ELIM: .cfi_offset r11, -24 82; CHECK-FP-ELIM: .cfi_offset r10, -28 83; CHECK-FP-ELIM: .cfi_offset r4, -32 84; CHECK-FP-ELIM: add r11, sp, #8 85; CHECK-FP-ELIM: .cfi_def_cfa r11, 24 86 87; CHECK-THUMB-FP-LABEL: sum 88; CHECK-THUMB-FP: .cfi_startproc 89; CHECK-THUMB-FP: sub sp, #16 90; CHECK-THUMB-FP: .cfi_def_cfa_offset 16 91; CHECK-THUMB-FP: push {r4, r5, r7, lr} 92; CHECK-THUMB-FP: .cfi_def_cfa_offset 32 93; CHECK-THUMB-FP: .cfi_offset lr, -20 94; CHECK-THUMB-FP: .cfi_offset r7, -24 95; CHECK-THUMB-FP: .cfi_offset r5, -28 96; CHECK-THUMB-FP: .cfi_offset r4, -32 97; CHECK-THUMB-FP: sub sp, #8 98; CHECK-THUMB-FP: .cfi_def_cfa_offset 40 99 100; CHECK-THUMB-FP-ELIM-LABEL: sum 101; CHECK-THUMB-FP-ELIM: .cfi_startproc 102; CHECK-THUMB-FP-ELIM: sub sp, #16 103; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 16 104; CHECK-THUMB-FP-ELIM: push {r4, r5, r7, lr} 105; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 32 106; CHECK-THUMB-FP-ELIM: .cfi_offset lr, -20 107; CHECK-THUMB-FP-ELIM: .cfi_offset r7, -24 108; CHECK-THUMB-FP-ELIM: .cfi_offset r5, -28 109; CHECK-THUMB-FP-ELIM: .cfi_offset r4, -32 110; CHECK-THUMB-FP-ELIM: add r7, sp, #8 111; CHECK-THUMB-FP-ELIM: .cfi_def_cfa r7, 24 112 113define i32 @sum(i32 %count, ...) { 114entry: 115 %vl = alloca i8*, align 4 116 %vl1 = bitcast i8** %vl to i8* 117 call void @llvm.va_start(i8* %vl1) 118 %cmp4 = icmp sgt i32 %count, 0 119 br i1 %cmp4, label %for.body, label %for.end 120 121for.body: ; preds = %entry, %for.body 122 %i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ] 123 %ap.cur = load i8** %vl, align 4 124 %ap.next = getelementptr i8* %ap.cur, i32 4 125 store i8* %ap.next, i8** %vl, align 4 126 %0 = bitcast i8* %ap.cur to i32* 127 %1 = load i32* %0, align 4 128 %call = call i32 @foo(i32 %1) #1 129 %inc = add nsw i32 %i.05, 1 130 %exitcond = icmp eq i32 %inc, %count 131 br i1 %exitcond, label %for.end, label %for.body 132 133for.end: ; preds = %for.body, %entry 134 call void @llvm.va_end(i8* %vl1) 135 ret i32 undef 136} 137 138declare void @llvm.va_start(i8*) nounwind 139 140declare i32 @foo(i32) 141 142declare void @llvm.va_end(i8*) nounwind 143