1 ; RUN: llc -o - %s | FileCheck %s 2 ; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF 3 ; This test checks that parameters on the stack pointer are correctly 4 ; referenced by debug info. 5 target triple = "x86_64--" 6 7 @glob = external global i64 8 @ptr = external global i32* 9 %struct.s = type { i32, i32, i32, i32, i32 } 10 11 ; Simple case: no FP, use offset from RSP. 12 13 ; CHECK-LABEL: f0: 14 ; CHECK-NOT: pushq 15 ; CHECK: movl $42, %eax 16 ; CHECK: retq 17 define i32 @f0(%struct.s* byval align 8 %input) !dbg !8 { 18 call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !4, metadata !17), !dbg !18 19 ret i32 42, !dbg !18 20 } 21 22 ; DWARF-LABEL: .debug_info contents: 23 24 ; DWARF-LABEL: DW_TAG_subprogram 25 ; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg7 RSP) 26 ; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f0") 27 ; DWARF: DW_TAG_formal_parameter 28 ; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +8) 29 ; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input") 30 31 32 ; Dynamic alloca forces the use of RBP as the base pointer 33 34 ; CHECK-LABEL: f1: 35 ; CHECK: pushq %rbp 36 ; CHECK: movl $42, %eax 37 ; CHECK: popq %rbp 38 ; CHECK: retq 39 define i32 @f1(%struct.s* byval align 8 %input) !dbg !19 { 40 %val = load i64, i64* @glob 41 ; this alloca should force FP usage. 42 %stackspace = alloca i32, i64 %val, align 1 43 store i32* %stackspace, i32** @ptr 44 call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !20, metadata !17), !dbg !21 45 ret i32 42, !dbg !21 46 } 47 48 ; DWARF-LABEL: DW_TAG_subprogram 49 ; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg6 RBP) 50 ; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f1") 51 ; DWARF: DW_TAG_formal_parameter 52 ; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +16) 53 ; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input") 54 55 ; CHECK-LABEL: f2: 56 ; Just check that we are indeed aligning the stack and setting up a base pointer 57 ; in RBX. 58 ; CHECK: pushq %rbp 59 ; CHECK: movq %rsp, %rbp 60 ; CHECK: pushq %rbx 61 ; CHECK: andq $-64, %rsp 62 ; CHECK: subq $64, %rsp 63 ; CHECK: movq %rsp, %rbx 64 define i32 @f2(%struct.s* byval align 8 %input) !dbg !22 { 65 %val = load i64, i64* @glob 66 %stackspace = alloca i32, i64 %val, align 64 67 store i32* %stackspace, i32** @ptr 68 call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !23, metadata !17), !dbg !24 69 ret i32 42, !dbg !24 70 } 71 72 ; "input" should still be referred to through RBP. 73 ; DWARF-LABEL: DW_TAG_subprogram 74 ; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg6 RBP) 75 ; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f2") 76 ; DWARF: DW_TAG_formal_parameter 77 ; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +16) 78 ; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input") 79 80 declare void @llvm.dbg.declare(metadata, metadata, metadata) 81 82 !llvm.dbg.cu = !{!2} 83 !llvm.module.flags = !{!0, !1} 84 85 !0 = !{i32 2, !"Dwarf Version", i32 4} 86 !1 = !{i32 2, !"Debug Info Version", i32 3} 87 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, emissionKind: FullDebug) 88 !3 = !DIFile(filename: "dbg-baseptr.ll", directory: "/") 89 !4 = !DILocalVariable(name: "input", arg: 1, scope: !8, file: !3, line: 5, type: !9) 90 !5 = !{} 91 92 !6 = !DISubroutineType(types: !7) 93 !7 = !{!10, !9} 94 95 !8 = distinct !DISubprogram(name: "f0", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, unit: !2, retainedNodes: !5) 96 97 !9 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s", elements: !11) 98 !10 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 99 !11 = !{!12, !13, !14, !15, !16} 100 !12 = !DIDerivedType(tag: DW_TAG_member, name: "a", baseType: !10, size: 32) 101 !13 = !DIDerivedType(tag: DW_TAG_member, name: "b", baseType: !10, size: 32, offset: 32) 102 !14 = !DIDerivedType(tag: DW_TAG_member, name: "c", baseType: !10, size: 32, offset: 64) 103 !15 = !DIDerivedType(tag: DW_TAG_member, name: "d", baseType: !10, size: 32, offset: 96) 104 !16 = !DIDerivedType(tag: DW_TAG_member, name: "e", baseType: !10, size: 32, offset: 128) 105 106 !17 = !DIExpression() 107 !18 = !DILocation(line: 5, scope: !8) 108 109 !19 = distinct !DISubprogram(name: "f1", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, retainedNodes: !5) 110 !20 = !DILocalVariable(name: "input", arg: 1, scope: !19, file: !3, line: 5, type: !9) 111 !21 = !DILocation(line: 5, scope: !19) 112 !22 = distinct !DISubprogram(name: "f2", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, retainedNodes: !5) 113 !23 = !DILocalVariable(name: "input", arg: 1, scope: !22, file: !3, line: 5, type: !9) 114 !24 = !DILocation(line: 5, scope: !22) 115
