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--"
7 @glob = external global i64
8 @ptr = external global ptr
9 %struct.s = type { i32, i32, i32, i32, i32 }
11 ; Simple case: no FP, use offset from RSP.
15 ; CHECK: movl $42, %eax
17 define i32 @f0(ptr byval(%struct.s) align 8 %input) !dbg !8 {
18 call void @llvm.dbg.declare(metadata ptr %input, metadata !4, metadata !17), !dbg !18
22 ; DWARF-LABEL: .debug_info contents:
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")
32 ; Dynamic alloca forces the use of RBP as the base pointer
36 ; CHECK: movl $42, %eax
39 define i32 @f1(ptr byval(%struct.s) align 8 %input) !dbg !19 {
40 %val = load i64, ptr @glob
41 ; this alloca should force FP usage.
42 %stackspace = alloca i32, i64 %val, align 1
43 store ptr %stackspace, ptr @ptr
44 call void @llvm.dbg.declare(metadata ptr %input, metadata !20, metadata !17), !dbg !21
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")
56 ; Just check that we are indeed aligning the stack and setting up a base pointer
59 ; CHECK: movq %rsp, %rbp
61 ; CHECK: andq $-64, %rsp
62 ; CHECK: subq $64, %rsp
63 ; CHECK: movq %rsp, %rbx
64 define i32 @f2(ptr byval(%struct.s) align 8 %input) !dbg !22 {
65 %val = load i64, ptr @glob
66 %stackspace = alloca i32, i64 %val, align 64
67 store ptr %stackspace, ptr @ptr
68 call void @llvm.dbg.declare(metadata ptr %input, metadata !23, metadata !17), !dbg !24
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")
80 declare void @llvm.dbg.declare(metadata, metadata, metadata)
83 !llvm.module.flags = !{!0, !1}
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)
92 !6 = !DISubroutineType(types: !7)
95 !8 = distinct !DISubprogram(name: "f0", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, unit: !2, retainedNodes: !5)
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)
106 !17 = !DIExpression()
107 !18 = !DILocation(line: 5, scope: !8)
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)