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229943585f
argument of the llvm.dbg.declare/llvm.dbg.value intrinsics. Previously, DIVariable was a variable-length field that has an optional reference to a Metadata array consisting of a variable number of complex address expressions. In the case of OpPiece expressions this is wasting a lot of storage in IR, because when an aggregate type is, e.g., SROA'd into all of its n individual members, the IR will contain n copies of the DIVariable, all alike, only differing in the complex address reference at the end. By making the complex address into an extra argument of the dbg.value/dbg.declare intrinsics, all of the pieces can reference the same variable and the complex address expressions can be uniqued across the CU, too. Down the road, this will allow us to move other flags, such as "indirection" out of the DIVariable, too. The new intrinsics look like this: declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr) declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr) This patch adds a new LLVM-local tag to DIExpressions, so we can detect and pretty-print DIExpression metadata nodes. What this patch doesn't do: This patch does not touch the "Indirect" field in DIVariable; but moving that into the expression would be a natural next step. http://reviews.llvm.org/D4919 rdar://problem/17994491 Thanks to dblaikie and dexonsmith for reviewing this patch! llvm-svn: 218778
105 lines
5.5 KiB
LLVM
105 lines
5.5 KiB
LLVM
; RUN: llc -O0 %s -mtriple=x86_64-apple-darwin -filetype=obj -o %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; RUN: llc -O0 %s -mtriple=x86_64-apple-darwin -filetype=obj -o %t -dwarf-version=3
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; RUN: llvm-dwarfdump %t | FileCheck %s -check-prefix=DWARF3
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; RUN: llc < %s -O0 -mtriple=x86_64-apple-macosx10.7 | FileCheck %s -check-prefix=ASM
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; rdar://13067005
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
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; CHECK: DW_AT_high_pc [DW_FORM_data4] (0x00000010)
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
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; CHECK: DW_AT_high_pc [DW_FORM_data4] (0x00000010)
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x0000003c)
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000010)
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; CHECK: DW_AT_high_pc [DW_FORM_data4] (0x00000009)
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000010)
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; CHECK: DW_AT_high_pc [DW_FORM_data4] (0x00000009)
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; CHECK: .debug_line contents:
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; CHECK-NEXT: Line table prologue:
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; CHECK-NEXT: total_length: 0x00000038
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; CHECK: file_names[ 1] 0 0x00000000 0x00000000 simple.c
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; CHECK: Line table prologue:
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; CHECK-NEXT: total_length: 0x00000039
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; CHECK: file_names[ 1] 0 0x00000000 0x00000000 simple2.c
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; CHECK-NOT: file_names
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; DWARF3: .debug_info contents:
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; DWARF3: DW_TAG_compile_unit
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; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
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; DWARF3: DW_TAG_compile_unit
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; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x0000003c)
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; DWARF3: .debug_line contents:
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; DWARF3-NEXT: Line table prologue:
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; DWARF3-NEXT: total_length: 0x00000038
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; DWARF3: file_names[ 1] 0 0x00000000 0x00000000 simple.c
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; DWARF3: Line table prologue:
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; DWARF3-NEXT: total_length: 0x00000039
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; DWARF3: file_names[ 1] 0 0x00000000 0x00000000 simple2.c
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; DWARF3-NOT: file_names
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; PR15408
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; ASM: L__DWARF__debug_info_begin0:
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; ASM: Lset3 = Lline_table_start0-Lsection_line ## DW_AT_stmt_list
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; ASM-NEXT: .long Lset3
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; ASM: L__DWARF__debug_info_begin1:
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; ASM: Lset13 = Lline_table_start0-Lsection_line ## DW_AT_stmt_list
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; ASM-NEXT: .long Lset13
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define i32 @test(i32 %a) nounwind uwtable ssp {
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entry:
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%a.addr = alloca i32, align 4
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store i32 %a, i32* %a.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %a.addr}, metadata !15, metadata !{}), !dbg !16
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%0 = load i32* %a.addr, align 4, !dbg !17
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%call = call i32 @fn(i32 %0), !dbg !17
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ret i32 %call, !dbg !17
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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define i32 @fn(i32 %a) nounwind uwtable ssp {
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entry:
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%a.addr = alloca i32, align 4
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store i32 %a, i32* %a.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %a.addr}, metadata !19, metadata !{}), !dbg !20
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%0 = load i32* %a.addr, align 4, !dbg !21
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ret i32 %0, !dbg !21
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}
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!llvm.dbg.cu = !{!0, !10}
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!llvm.module.flags = !{!25}
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!0 = metadata !{i32 786449, metadata !23, i32 12, metadata !"clang version 3.3", i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1, metadata !1, metadata !"", i32 1} ; [ DW_TAG_compile_unit ]
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!1 = metadata !{}
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!3 = metadata !{metadata !5}
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!5 = metadata !{i32 786478, metadata !23, metadata !6, metadata !"test", metadata !"test", metadata !"", i32 2, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @test, null, null, metadata !1, i32 3} ; [ DW_TAG_subprogram ] [line 2] [def] [scope 3] [test]
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!6 = metadata !{i32 786473, metadata !23} ; [ DW_TAG_file_type ]
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!7 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = metadata !{metadata !9, metadata !9}
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!9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!10 = metadata !{i32 786449, metadata !24, i32 12, metadata !"clang version 3.3 (trunk 172862)", i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !11, metadata !1, metadata !1, metadata !"", i32 1} ; [ DW_TAG_compile_unit ]
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!11 = metadata !{metadata !13}
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!13 = metadata !{i32 786478, metadata !24, metadata !14, metadata !"fn", metadata !"fn", metadata !"", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @fn, null, null, metadata !1, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [fn]
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!14 = metadata !{i32 786473, metadata !24} ; [ DW_TAG_file_type ]
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!15 = metadata !{i32 786689, metadata !5, metadata !"a", metadata !6, i32 16777218, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 2]
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!16 = metadata !{i32 2, i32 0, metadata !5, null}
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!17 = metadata !{i32 4, i32 0, metadata !18, null}
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!18 = metadata !{i32 786443, metadata !23, metadata !5, i32 3, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
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!19 = metadata !{i32 786689, metadata !13, metadata !"a", metadata !14, i32 16777217, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 1]
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!20 = metadata !{i32 1, i32 0, metadata !13, null}
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!21 = metadata !{i32 2, i32 0, metadata !22, null}
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!22 = metadata !{i32 786443, metadata !24, metadata !13, i32 1, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
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!23 = metadata !{metadata !"simple.c", metadata !"/private/tmp"}
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!24 = metadata !{metadata !"simple2.c", metadata !"/private/tmp"}
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!25 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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