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125 lines
6.3 KiB
LLVM
125 lines
6.3 KiB
LLVM
; RUN: llc -mtriple=x86_64-pc-linux -filetype=obj -function-sections -o %t < %s
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; RUN: llvm-dwarfdump -v -debug-info -debug-loclists %t | FileCheck %s
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; RUN: llc -dwarf-version=5 -split-dwarf-file=foo.dwo -mtriple=x86_64-pc-linux -filetype=obj -function-sections -o %t < %s
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; RUN: llvm-dwarfdump -v -debug-info -debug-loclists %t | FileCheck %s --check-prefix=DWO
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location [DW_FORM_loclistx] (indexed (0x0) loclist = 0x00000018:
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; CHECK-NEXT: [0x0000000000000000, 0x0000000000000003) ".text._Z2f1ii": DW_OP_consts +3, DW_OP_stack_value
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; CHECK-NEXT: [0x0000000000000003, 0x0000000000000004) ".text._Z2f1ii": DW_OP_consts +4, DW_OP_stack_value)
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; CHECK-NEXT: DW_AT_name {{.*}} "y"
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location [DW_FORM_loclistx] (indexed (0x1) loclist = 0x00000029:
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; CHECK-NEXT: [0x0000000000000000, 0x0000000000000003) ".text._Z2f1ii": DW_OP_consts +5, DW_OP_stack_value)
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; CHECK-NEXT: DW_AT_name {{.*}} "x"
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location [DW_FORM_loclistx] (indexed (0x2) loclist = 0x00000031:
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; CHECK-NEXT: [0x0000000000000003, 0x0000000000000004) ".text._Z2f1ii": DW_OP_reg0 RAX)
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; CHECK-NEXT: DW_AT_name {{.*}} "r"
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; CHECK: .debug_loclists contents:
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; CHECK-NEXT: 0x00000000: locations list header: length = 0x00000035, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000003
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; DWO: .debug_loclists.dwo contents:
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; DWO-NEXT: 0x00000000: locations list header: length = 0x00000035, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000003
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; CHECK-NEXT: offsets: [
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; CHECK-NEXT: 0x0000000c => 0x00000018
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; CHECK-NEXT: 0x0000001d => 0x00000029
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; CHECK-NEXT: 0x00000025 => 0x00000031
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; CHECK-NEXT: ]
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; Don't use startx_length if there's more than one entry, because the shared
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; base address will be useful for both the range that does start at the start of
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; the function, and the one that doesn't.
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; CHECK-NEXT: 0x00000018:
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; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000)
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; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000003): DW_OP_consts +3, DW_OP_stack_value
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; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004): DW_OP_consts +4, DW_OP_stack_value
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; CHECK-NEXT: DW_LLE_end_of_list ()
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; Show that startx_length can be used when the address range starts at the start of the function.
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; CHECK: 0x00000029:
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; CHECK-NEXT: DW_LLE_startx_length (0x0000000000000000, 0x0000000000000003): DW_OP_consts +5, DW_OP_stack_value
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; CHECK-NEXT: DW_LLE_end_of_list ()
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; And use a base address when the range doesn't start at an existing/useful
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; address in the pool.
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; CHECK: 0x00000031:
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; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000)
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; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004): DW_OP_reg0 RAX
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; CHECK-NEXT: DW_LLE_end_of_list ()
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; Built with clang -O3 -ffunction-sections from source:
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;
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; int f1(int i, int j) {
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; int x = 5;
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; int y = 3;
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; int r = i + j;
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; int undef;
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; x = undef;
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; y = 4;
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; return r;
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; }
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; void f2() {
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; }
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; Function Attrs: norecurse nounwind readnone uwtable
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define dso_local i32 @_Z2f1ii(i32 %i, i32 %j) local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 %i, metadata !12, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata i32 %j, metadata !13, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata i32 5, metadata !14, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata i32 3, metadata !15, metadata !DIExpression()), !dbg !18
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%add = add nsw i32 %j, %i, !dbg !19
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call void @llvm.dbg.value(metadata i32 %add, metadata !16, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata i32 4, metadata !15, metadata !DIExpression()), !dbg !18
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ret i32 %add, !dbg !20
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}
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; Function Attrs: norecurse nounwind readnone uwtable
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define dso_local void @_Z2f2v() local_unnamed_addr !dbg !21 {
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entry:
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ret void, !dbg !24
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (trunk 374581) (llvm/trunk 374579)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "loc2.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch", checksumkind: CSK_MD5, checksum: "91e0069c680e2a63f4f885ec93f5d07e")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 5}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 10.0.0 (trunk 374581) (llvm/trunk 374579)"}
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!7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1ii", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !13, !14, !15, !16, !17}
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!12 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!13 = !DILocalVariable(name: "j", arg: 2, scope: !7, file: !1, line: 1, type: !10)
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!14 = !DILocalVariable(name: "x", scope: !7, file: !1, line: 2, type: !10)
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!15 = !DILocalVariable(name: "y", scope: !7, file: !1, line: 3, type: !10)
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!16 = !DILocalVariable(name: "r", scope: !7, file: !1, line: 4, type: !10)
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!17 = !DILocalVariable(name: "undef", scope: !7, file: !1, line: 5, type: !10)
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!18 = !DILocation(line: 0, scope: !7)
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!19 = !DILocation(line: 4, column: 13, scope: !7)
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!20 = !DILocation(line: 8, column: 3, scope: !7)
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!21 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 10, type: !22, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!22 = !DISubroutineType(types: !23)
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!23 = !{null}
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!24 = !DILocation(line: 11, column: 1, scope: !21)
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