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llvm-6502/test/DebugInfo/X86/block-capture.ll
Duncan P. N. Exon Smith 83902832de Revert "Revert "DI: Fold constant arguments into a single MDString"" 
This reverts commit r218918, effectively reapplying r218914 after fixing
an Ocaml bindings test and an Asan crash.  The root cause of the latter
was a tightened-up check in `DILexicalBlock::Verify()`, so I'll file a
PR to investigate who requires the loose check (and why).

Original commit message follows.

--

This patch addresses the first stage of PR17891 by folding constant
arguments together into a single MDString.  Integers are stringified and
a `\0` character is used as a separator.

Part of PR17891.

Note: I've attached my testcases upgrade scripts to the PR.  If I've
just broken your out-of-tree testcases, they might help.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219010 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-03 20:01:09 +00:00

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; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t -filetype=obj
; RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck %s
; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t -filetype=obj -dwarf-version=3
; RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck %s -check-prefix=DWARF3
; Checks that we emit debug info for the block variable declare.
; CHECK: DW_TAG_subprogram
; CHECK: DW_TAG_variable
; CHECK: DW_AT_location [DW_FORM_sec_offset]
; CHECK: DW_AT_name {{.*}} "block"
; DWARF3: DW_TAG_subprogram
; DWARF3: DW_TAG_variable
; DWARF3: DW_AT_location [DW_FORM_data4]
; DWARF3: DW_AT_name {{.*}} "block"
%struct.__block_descriptor = type { i64, i64 }
%struct.__block_literal_generic = type { i8*, i32, i32, i8*, %struct.__block_descriptor* }
declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
define hidden void @__foo_block_invoke_0(i8* %.block_descriptor) uwtable ssp {
entry:
%exn.slot = alloca i8*
%ehselector.slot = alloca i32
call void @llvm.dbg.value(metadata !{i8* %.block_descriptor}, i64 0, metadata !39, metadata !{metadata !"0x102"}), !dbg !51
%block = bitcast i8* %.block_descriptor to <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, void ()* }>*, !dbg !52
call void @llvm.dbg.declare(metadata !{<{ i8*, i32, i32, i8*, %struct.__block_descriptor*, void ()* }>* %block}, metadata !53, metadata !65), !dbg !54
%block.capture.addr = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, void ()* }>* %block, i32 0, i32 5, !dbg !55
%0 = load void ()** %block.capture.addr, align 8, !dbg !55
%block.literal = bitcast void ()* %0 to %struct.__block_literal_generic*, !dbg !55
%1 = getelementptr inbounds %struct.__block_literal_generic* %block.literal, i32 0, i32 3, !dbg !55
%2 = bitcast %struct.__block_literal_generic* %block.literal to i8*, !dbg !55
%3 = load i8** %1, !dbg !55
%4 = bitcast i8* %3 to void (i8*)*, !dbg !55
invoke void %4(i8* %2)
to label %invoke.cont unwind label %lpad, !dbg !55
invoke.cont: ; preds = %entry
br label %eh.cont, !dbg !58
eh.cont: ; preds = %catch, %invoke.cont
ret void, !dbg !61
lpad: ; preds = %entry
%5 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
catch i8* null, !dbg !55
%6 = extractvalue { i8*, i32 } %5, 0, !dbg !55
store i8* %6, i8** %exn.slot, !dbg !55
%7 = extractvalue { i8*, i32 } %5, 1, !dbg !55
store i32 %7, i32* %ehselector.slot, !dbg !55
br label %catch, !dbg !55
catch: ; preds = %lpad
%exn = load i8** %exn.slot, !dbg !62
%exn.adjusted = call i8* @objc_begin_catch(i8* %exn) nounwind, !dbg !62
call void @objc_end_catch(), !dbg !58
br label %eh.cont, !dbg !58
}
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
declare i8* @objc_begin_catch(i8*)
declare void @objc_end_catch()
declare i32 @__objc_personality_v0(...)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!35, !36, !37, !38, !64}
!0 = metadata !{metadata !"0x11\0016\00clang version 3.1 (trunk 151227)\000\00\002\00\001", metadata !63, metadata !1, metadata !1, metadata !3, metadata !1, metadata !1} ; [ DW_TAG_compile_unit ]
!1 = metadata !{}
!3 = metadata !{metadata !5, metadata !28, metadata !31, metadata !34}
!5 = metadata !{metadata !"0x2e\00foo\00foo\00\005\000\001\000\006\00256\000\005", metadata !6, metadata !6, metadata !7, null, null, null, null, null} ; [ DW_TAG_subprogram ]
!6 = metadata !{metadata !"0x29", metadata !63} ; [ DW_TAG_file_type ]
!7 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !8, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!8 = metadata !{null, metadata !9}
!9 = metadata !{metadata !"0x16\00dispatch_block_t\001\000\000\000\000", metadata !63, null, metadata !10} ; [ DW_TAG_typedef ]
!10 = metadata !{metadata !"0xf\00\000\0064\000\000\000", null, null, metadata !11} ; [ DW_TAG_pointer_type ]
!11 = metadata !{metadata !"0x13\00__block_literal_generic\005\00256\000\000\008\000", metadata !63, metadata !6, null, metadata !12, null, null, null} ; [ DW_TAG_structure_type ] [__block_literal_generic] [line 5, size 256, align 0, offset 0] [def] [from ]
!12 = metadata !{metadata !13, metadata !15, metadata !17, metadata !18, metadata !19}
!13 = metadata !{metadata !"0xd\00__isa\000\0064\0064\000\000", metadata !63, metadata !6, metadata !14} ; [ DW_TAG_member ]
!14 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, null} ; [ DW_TAG_pointer_type ]
!15 = metadata !{metadata !"0xd\00__flags\000\0032\0032\0064\000", metadata !63, metadata !6, metadata !16} ; [ DW_TAG_member ]
!16 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ]
!17 = metadata !{metadata !"0xd\00__reserved\000\0032\0032\0096\000", metadata !63, metadata !6, metadata !16} ; [ DW_TAG_member ]
!18 = metadata !{metadata !"0xd\00__FuncPtr\000\0064\0064\00128\000", metadata !63, metadata !6, metadata !14} ; [ DW_TAG_member ]
!19 = metadata !{metadata !"0xd\00__descriptor\005\0064\0064\00192\000", metadata !63, metadata !6, metadata !20} ; [ DW_TAG_member ]
!20 = metadata !{metadata !"0xf\00\000\0064\000\000\000", null, null, metadata !21} ; [ DW_TAG_pointer_type ]
!21 = metadata !{metadata !"0x13\00__block_descriptor\005\00128\000\000\008\000", metadata !63, metadata !6, null, metadata !22, null, null, null} ; [ DW_TAG_structure_type ] [__block_descriptor] [line 5, size 128, align 0, offset 0] [def] [from ]
!22 = metadata !{metadata !23, metadata !25}
!23 = metadata !{metadata !"0xd\00reserved\000\0064\0064\000\000", metadata !63, metadata !6, metadata !24} ; [ DW_TAG_member ]
!24 = metadata !{metadata !"0x24\00long unsigned int\000\0064\0064\000\000\007", null, null} ; [ DW_TAG_base_type ]
!25 = metadata !{metadata !"0xd\00Size\000\0064\0064\0064\000", metadata !63, metadata !6, metadata !24} ; [ DW_TAG_member ]
!28 = metadata !{metadata !"0x2e\00__foo_block_invoke_0\00__foo_block_invoke_0\00\007\001\001\000\006\00256\000\007", metadata !6, metadata !6, metadata !29, null, void (i8*)* @__foo_block_invoke_0, null, null, null} ; [ DW_TAG_subprogram ]
!29 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !30, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!30 = metadata !{null, metadata !14}
!31 = metadata !{metadata !"0x2e\00__copy_helper_block_\00__copy_helper_block_\00\0010\001\001\000\006\00256\000\0010", metadata !6, metadata !6, metadata !32, null, null, null, null, null} ; [ DW_TAG_subprogram ]
!32 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !33, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!33 = metadata !{null, metadata !14, metadata !14}
!34 = metadata !{metadata !"0x2e\00__destroy_helper_block_\00__destroy_helper_block_\00\0010\001\001\000\006\00256\000\0010", metadata !6, metadata !6, metadata !29, null, null, null, null, null} ; [ DW_TAG_subprogram ]
!35 = metadata !{i32 1, metadata !"Objective-C Version", i32 2}
!36 = metadata !{i32 1, metadata !"Objective-C Image Info Version", i32 0}
!37 = metadata !{i32 1, metadata !"Objective-C Image Info Section", metadata !"__DATA, __objc_imageinfo, regular, no_dead_strip"}
!38 = metadata !{i32 4, metadata !"Objective-C Garbage Collection", i32 0}
!39 = metadata !{metadata !"0x101\00.block_descriptor\0016777223\0064", metadata !28, metadata !6, metadata !40} ; [ DW_TAG_arg_variable ]
!40 = metadata !{metadata !"0xf\00\000\0064\000\000\000", null, null, metadata !41} ; [ DW_TAG_pointer_type ]
!41 = metadata !{metadata !"0x13\00__block_literal_1\007\00320\0064\000\000\000", metadata !63, metadata !6, null, metadata !42, null, null, null} ; [ DW_TAG_structure_type ] [__block_literal_1] [line 7, size 320, align 64, offset 0] [def] [from ]
!42 = metadata !{metadata !43, metadata !44, metadata !45, metadata !46, metadata !47, metadata !50}
!43 = metadata !{metadata !"0xd\00__isa\007\0064\0064\000\000", metadata !63, metadata !6, metadata !14} ; [ DW_TAG_member ]
!44 = metadata !{metadata !"0xd\00__flags\007\0032\0032\0064\000", metadata !63, metadata !6, metadata !16} ; [ DW_TAG_member ]
!45 = metadata !{metadata !"0xd\00__reserved\007\0032\0032\0096\000", metadata !63, metadata !6, metadata !16} ; [ DW_TAG_member ]
!46 = metadata !{metadata !"0xd\00__FuncPtr\007\0064\0064\00128\000", metadata !63, metadata !6, metadata !14} ; [ DW_TAG_member ]
!47 = metadata !{metadata !"0xd\00__descriptor\007\0064\0064\00192\000", metadata !63, metadata !6, metadata !48} ; [ DW_TAG_member ]
!48 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !49} ; [ DW_TAG_pointer_type ]
!49 = metadata !{metadata !"0x13\00__block_descriptor_withcopydispose\007\000\000\000\004\000", metadata !63, null, null, null, null, null, null} ; [ DW_TAG_structure_type ] [__block_descriptor_withcopydispose] [line 7, size 0, align 0, offset 0] [decl] [from ]
!50 = metadata !{metadata !"0xd\00block\007\0064\0064\00256\000", metadata !63, metadata !6, metadata !9} ; [ DW_TAG_member ]
!51 = metadata !{i32 7, i32 18, metadata !28, null}
!52 = metadata !{i32 7, i32 19, metadata !28, null}
!53 = metadata !{metadata !"0x100\00block\005\000", metadata !28, metadata !6, metadata !9} ; [ DW_TAG_auto_variable ]
!54 = metadata !{i32 5, i32 27, metadata !28, null}
!55 = metadata !{i32 8, i32 22, metadata !56, null}
!56 = metadata !{metadata !"0xb\007\0026\002", metadata !6, metadata !57} ; [ DW_TAG_lexical_block ]
!57 = metadata !{metadata !"0xb\007\0019\001", metadata !6, metadata !28} ; [ DW_TAG_lexical_block ]
!58 = metadata !{i32 10, i32 20, metadata !59, null}
!59 = metadata !{metadata !"0xb\009\0035\004", metadata !6, metadata !60} ; [ DW_TAG_lexical_block ]
!60 = metadata !{metadata !"0xb\009\0035\003", metadata !6, metadata !57} ; [ DW_TAG_lexical_block ]
!61 = metadata !{i32 10, i32 21, metadata !28, null}
!62 = metadata !{i32 9, i32 20, metadata !56, null}
!63 = metadata !{metadata !"foo.m", metadata !"/Users/echristo"}
!64 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
!65 = metadata !{metadata !"0x102\0034\0032"} ; [ DW_TAG_expression ] [DW_OP_plus 32]
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