115 lines
4.6 KiB
LLVM
115 lines
4.6 KiB
LLVM
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; RUN: llc -o - %s | FileCheck %s
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; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF
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; This test checks that parameters on the stack pointer are correctly
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; referenced by debug info.
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target triple = "x86_64--"
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@glob = external global i64
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@ptr = external global i32*
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%struct.s = type { i32, i32, i32, i32, i32 }
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; Simple case: no FP, use offset from RSP.
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; CHECK-LABEL: f0:
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; CHECK-NOT: pushq
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; CHECK: movl $42, %eax
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; CHECK: retq
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define i32 @f0(%struct.s* byval(%struct.s) align 8 %input) !dbg !8 {
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call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !4, metadata !17), !dbg !18
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ret i32 42, !dbg !18
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}
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; DWARF-LABEL: .debug_info contents:
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; DWARF-LABEL: DW_TAG_subprogram
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; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg7 RSP)
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; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f0")
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; DWARF: DW_TAG_formal_parameter
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; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +8)
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; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
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; Dynamic alloca forces the use of RBP as the base pointer
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; CHECK-LABEL: f1:
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; CHECK: pushq %rbp
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; CHECK: movl $42, %eax
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; CHECK: popq %rbp
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; CHECK: retq
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define i32 @f1(%struct.s* byval(%struct.s) align 8 %input) !dbg !19 {
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%val = load i64, i64* @glob
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; this alloca should force FP usage.
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%stackspace = alloca i32, i64 %val, align 1
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store i32* %stackspace, i32** @ptr
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call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !20, metadata !17), !dbg !21
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ret i32 42, !dbg !21
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}
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; DWARF-LABEL: DW_TAG_subprogram
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; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg6 RBP)
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; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f1")
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; DWARF: DW_TAG_formal_parameter
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; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +16)
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; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
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; CHECK-LABEL: f2:
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; Just check that we are indeed aligning the stack and setting up a base pointer
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; in RBX.
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; CHECK: pushq %rbp
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; CHECK: movq %rsp, %rbp
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; CHECK: pushq %rbx
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; CHECK: andq $-64, %rsp
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; CHECK: subq $64, %rsp
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; CHECK: movq %rsp, %rbx
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define i32 @f2(%struct.s* byval(%struct.s) align 8 %input) !dbg !22 {
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%val = load i64, i64* @glob
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%stackspace = alloca i32, i64 %val, align 64
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store i32* %stackspace, i32** @ptr
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call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !23, metadata !17), !dbg !24
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ret i32 42, !dbg !24
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}
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; "input" should still be referred to through RBP.
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; DWARF-LABEL: DW_TAG_subprogram
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; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg6 RBP)
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; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f2")
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; DWARF: DW_TAG_formal_parameter
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; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +16)
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; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!0, !1}
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!0 = !{i32 2, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, emissionKind: FullDebug)
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!3 = !DIFile(filename: "dbg-baseptr.ll", directory: "/")
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!4 = !DILocalVariable(name: "input", arg: 1, scope: !8, file: !3, line: 5, type: !9)
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!5 = !{}
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!6 = !DISubroutineType(types: !7)
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!7 = !{!10, !9}
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!8 = distinct !DISubprogram(name: "f0", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, unit: !2, retainedNodes: !5)
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!9 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s", elements: !11)
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!10 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!11 = !{!12, !13, !14, !15, !16}
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "a", baseType: !10, size: 32)
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!13 = !DIDerivedType(tag: DW_TAG_member, name: "b", baseType: !10, size: 32, offset: 32)
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!14 = !DIDerivedType(tag: DW_TAG_member, name: "c", baseType: !10, size: 32, offset: 64)
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "d", baseType: !10, size: 32, offset: 96)
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "e", baseType: !10, size: 32, offset: 128)
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!17 = !DIExpression()
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!18 = !DILocation(line: 5, scope: !8)
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!19 = distinct !DISubprogram(name: "f1", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, retainedNodes: !5)
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!20 = !DILocalVariable(name: "input", arg: 1, scope: !19, file: !3, line: 5, type: !9)
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!21 = !DILocation(line: 5, scope: !19)
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!22 = distinct !DISubprogram(name: "f2", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, retainedNodes: !5)
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!23 = !DILocalVariable(name: "input", arg: 1, scope: !22, file: !3, line: 5, type: !9)
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!24 = !DILocation(line: 5, scope: !22)
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