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46975d210c
Normalize common kinds of DWARF sub-expressions to make debug info encoding a bit more compact: DW_OP_constu [X < 32] -> DW_OP_litX DW_OP_constu [all ones] -> DW_OP_lit0, DW_OP_not (64-bit only) Differential revision: https://reviews.llvm.org/D51640 llvm-svn: 341457
60 lines
3.3 KiB
LLVM
60 lines
3.3 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-darwin %s -o - -filetype=obj | \
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; RUN: llvm-dwarfdump -v --debug-info - | FileCheck %s
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;
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; Test emitting debug info for fragmented global values.
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; This is a handcrafted example of an SROAed global variable.
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.12.0"
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%struct.anon = type { i32, i32 }
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_name {{.*}}"point"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_addr 0x4, DW_OP_piece 0x4, DW_OP_addr 0x0, DW_OP_piece 0x4)
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_name {{.*}}"part_const"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_addr 0x8, DW_OP_piece 0x4, DW_OP_lit2, DW_OP_stack_value, DW_OP_piece 0x4)
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; [0x0000000000000008], piece 0x00000004, constu 0x00000002, stack-value, piece 0x00000004
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; CHECK-NOT: DW_TAG
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_name {{.*}}"full_const"
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_lit1, DW_OP_stack_value, DW_OP_piece 0x4, DW_OP_lit2, DW_OP_stack_value, DW_OP_piece 0x4)
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; CHECK-NOT: DW_TAG
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@point.y = global i32 2, align 4, !dbg !13
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@point.x = global i32 1, align 4, !dbg !12
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@part_const.x = global i32 1, align 4, !dbg !14
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!llvm.dbg.cu = !{!1}
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!llvm.module.flags = !{!10, !11}
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!0 = distinct !DIGlobalVariable(name: "point", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true)
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!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, globals: !4)
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!2 = !DIFile(filename: "g.c", directory: "/")
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!3 = !{}
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!4 = !{!12, !13, !14, !15, !17, !18, !20}
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!5 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !2, line: 1, size: 64, elements: !6)
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!6 = !{!7, !9}
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!7 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !5, file: !2, line: 1, baseType: !8, size: 32)
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!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!9 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !5, file: !2, line: 1, baseType: !8, size: 32, offset: 32)
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!10 = !{i32 2, !"Dwarf Version", i32 4}
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!11 = !{i32 2, !"Debug Info Version", i32 3}
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!12 = !DIGlobalVariableExpression(var: !0, expr: !DIExpression(DW_OP_LLVM_fragment, 0, 32))
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!13 = !DIGlobalVariableExpression(var: !0, expr: !DIExpression(DW_OP_LLVM_fragment, 32, 32))
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!14 = !DIGlobalVariableExpression(var: !16, expr: !DIExpression(DW_OP_LLVM_fragment, 0, 32))
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!15 = !DIGlobalVariableExpression(var: !16, expr: !DIExpression(DW_OP_constu, 2,
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DW_OP_stack_value, DW_OP_LLVM_fragment, 32, 32))
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!16 = distinct !DIGlobalVariable(name: "part_const", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true)
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!17 = !DIGlobalVariableExpression(var: !19, expr: !DIExpression(DW_OP_constu, 1,
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DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32))
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!18 = !DIGlobalVariableExpression(var: !19, expr: !DIExpression(DW_OP_constu, 2,
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DW_OP_stack_value, DW_OP_LLVM_fragment, 32, 32))
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!19 = distinct !DIGlobalVariable(name: "full_const", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true)
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!20 = !DIGlobalVariableExpression(var: !0, expr: !DIExpression())
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