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7d6813a6c8
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
115 lines
5.0 KiB
LLVM
115 lines
5.0 KiB
LLVM
; RUN: llc < %s | FileCheck %s --check-prefix=ASM
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; RUN: llc < %s -filetype=obj | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF
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; Values in registers should be clobbered by calls, which use a regmask instead
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; of individual register def operands.
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; ASM: main: # @main
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; ASM: #DEBUG_VALUE: main:argc <- %ECX
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; ASM: movl $1, x(%rip)
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; ASM: callq clobber
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; ASM-NEXT: [[argc_range_end:.Ltmp[0-9]+]]:
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; Previously LiveDebugValues would claim argc was still in ECX after the call.
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; ASM-NOT: #DEBUG_VALUE: main:argc
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; argc is the first debug location.
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; ASM: .Ldebug_loc1:
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; ASM-NEXT: .quad .Lfunc_begin0-.Lfunc_begin0
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; ASM-NEXT: .quad [[argc_range_end]]-.Lfunc_begin0
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; ASM-NEXT: .short 1 # Loc expr size
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; ASM-NEXT: .byte 82 # super-register DW_OP_reg2
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; argc is the first formal parameter.
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; DWARF: .debug_info contents:
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; DWARF: DW_TAG_formal_parameter
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; DWARF-NEXT: DW_AT_location [DW_FORM_sec_offset] ({{0x.*}}
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; DWARF-NEXT: 0x0000000000000000 - 0x0000000000000013: DW_OP_reg2 RCX)
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; DWARF-NEXT: DW_AT_name [DW_FORM_strp] {{.*}} "argc"
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; ModuleID = 't.cpp'
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source_filename = "test/DebugInfo/X86/dbg-value-regmask-clobber.ll"
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc18.0.0"
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@x = common global i32 0, align 4, !dbg !0
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; Function Attrs: nounwind uwtable
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define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 !dbg !12 {
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entry:
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tail call void @llvm.dbg.value(metadata i8** %argv, metadata !19, metadata !21), !dbg !22
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tail call void @llvm.dbg.value(metadata i32 %argc, metadata !20, metadata !21), !dbg !23
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store volatile i32 1, i32* @x, align 4, !dbg !24, !tbaa !25
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tail call void @clobber() #2, !dbg !29
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store volatile i32 2, i32* @x, align 4, !dbg !30, !tbaa !25
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%0 = load volatile i32, i32* @x, align 4, !dbg !31, !tbaa !25
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%tobool = icmp eq i32 %0, 0, !dbg !31
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br i1 %tobool, label %if.else, label %if.then, !dbg !33
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if.then: ; preds = %entry
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store volatile i32 3, i32* @x, align 4, !dbg !34, !tbaa !25
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br label %if.end, !dbg !36
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if.else: ; preds = %entry
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store volatile i32 4, i32* @x, align 4, !dbg !37, !tbaa !25
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret i32 0, !dbg !39
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}
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declare void @clobber()
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!8, !9, !10}
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!llvm.ident = !{!11}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (trunk 260617) (llvm/trunk 260619)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "t.cpp", directory: "D:\5Csrc\5Cllvm\5Cbuild")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"PIC Level", i32 2}
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!11 = !{!"clang version 3.9.0 (trunk 260617) (llvm/trunk 260619)"}
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!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !2, variables: !18)
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!13 = !DISubroutineType(types: !14)
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!14 = !{!7, !7, !15}
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!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64, align: 64)
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!16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 64, align: 64)
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!17 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!18 = !{!19, !20}
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!19 = !DILocalVariable(name: "argv", arg: 2, scope: !12, file: !3, line: 4, type: !15)
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!20 = !DILocalVariable(name: "argc", arg: 1, scope: !12, file: !3, line: 4, type: !7)
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!21 = !DIExpression()
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!22 = !DILocation(line: 4, column: 27, scope: !12)
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!23 = !DILocation(line: 4, column: 14, scope: !12)
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!24 = !DILocation(line: 5, column: 5, scope: !12)
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!25 = !{!26, !26, i64 0}
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!26 = !{!"int", !27, i64 0}
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!27 = !{!"omnipotent char", !28, i64 0}
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!28 = !{!"Simple C/C++ TBAA"}
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!29 = !DILocation(line: 6, column: 3, scope: !12)
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!30 = !DILocation(line: 7, column: 5, scope: !12)
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!31 = !DILocation(line: 8, column: 7, scope: !32)
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!32 = distinct !DILexicalBlock(scope: !12, file: !3, line: 8, column: 7)
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!33 = !DILocation(line: 8, column: 7, scope: !12)
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!34 = !DILocation(line: 9, column: 7, scope: !35)
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!35 = distinct !DILexicalBlock(scope: !32, file: !3, line: 8, column: 10)
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!36 = !DILocation(line: 10, column: 3, scope: !35)
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!37 = !DILocation(line: 11, column: 7, scope: !38)
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!38 = distinct !DILexicalBlock(scope: !32, file: !3, line: 10, column: 10)
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!39 = !DILocation(line: 13, column: 1, scope: !12)
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