1 ; RUN: llc < %s | FileCheck %s --check-prefix=ASM 2 ; RUN: llc < %s -filetype=obj | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF 3 4 ; Values in registers should be clobbered by calls, which use a regmask instead 5 ; of individual register def operands. 6 7 ; ASM: main: # @main 8 ; ASM: #DEBUG_VALUE: main:argc <- %ECX 9 ; ASM: movl $1, x(%rip) 10 ; ASM: callq clobber 11 ; ASM-NEXT: [[argc_range_end:.Ltmp[0-9]+]]: 12 ; Previously LiveDebugValues would claim argc was still in ECX after the call. 13 ; ASM-NOT: #DEBUG_VALUE: main:argc 14 15 ; argc is the first debug location. 16 ; ASM: .Ldebug_loc1: 17 ; ASM-NEXT: .quad .Lfunc_begin0-.Lfunc_begin0 18 ; ASM-NEXT: .quad [[argc_range_end]]-.Lfunc_begin0 19 ; ASM-NEXT: .short 3 # Loc expr size 20 ; ASM-NEXT: .byte 82 # super-register DW_OP_reg2 21 ; ASM-NEXT: .byte 147 # DW_OP_piece 22 ; ASM-NEXT: .byte 4 # 4 23 24 ; argc is the first formal parameter. 25 ; DWARF: .debug_info contents: 26 ; DWARF: DW_TAG_formal_parameter 27 ; DWARF-NEXT: DW_AT_location [DW_FORM_sec_offset] ([[argc_loc_offset:0x.*]]) 28 ; DWARF-NEXT: DW_AT_name [DW_FORM_strp] {{.*}} "argc" 29 30 ; DWARF: .debug_loc contents: 31 ; DWARF: [[argc_loc_offset]]: Beginning address offset: 0x0000000000000000 32 ; DWARF-NEXT: Ending address offset: 0x0000000000000013 33 ; DWARF-NEXT: Location description: 52 93 04 34 35 ; ModuleID = 't.cpp' 36 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 37 target triple = "x86_64-pc-windows-msvc18.0.0" 38 39 @x = common global i32 0, align 4 40 41 ; Function Attrs: nounwind uwtable 42 define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 !dbg !4 { 43 entry: 44 tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !12, metadata !21), !dbg !22 45 tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !13, metadata !21), !dbg !23 46 store volatile i32 1, i32* @x, align 4, !dbg !24, !tbaa !25 47 tail call void @clobber() #3, !dbg !29 48 store volatile i32 2, i32* @x, align 4, !dbg !30, !tbaa !25 49 %0 = load volatile i32, i32* @x, align 4, !dbg !31, !tbaa !25 50 %tobool = icmp eq i32 %0, 0, !dbg !31 51 br i1 %tobool, label %if.else, label %if.then, !dbg !33 52 53 if.then: ; preds = %entry 54 store volatile i32 3, i32* @x, align 4, !dbg !34, !tbaa !25 55 br label %if.end, !dbg !36 56 57 if.else: ; preds = %entry 58 store volatile i32 4, i32* @x, align 4, !dbg !37, !tbaa !25 59 br label %if.end 60 61 if.end: ; preds = %if.else, %if.then 62 ret i32 0, !dbg !39 63 } 64 65 declare void @clobber() 66 67 ; Function Attrs: nounwind readnone 68 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 69 70 attributes #0 = { nounwind uwtable } 71 attributes #2 = { nounwind readnone } 72 attributes #3 = { nounwind } 73 74 !llvm.dbg.cu = !{!0} 75 !llvm.module.flags = !{!17, !18, !19} 76 !llvm.ident = !{!20} 77 78 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 260617) (llvm/trunk 260619)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !14) 79 !1 = !DIFile(filename: "t.cpp", directory: "D:\5Csrc\5Cllvm\5Cbuild") 80 !2 = !{} 81 !4 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !11) 82 !5 = !DISubroutineType(types: !6) 83 !6 = !{!7, !7, !8} 84 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 85 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64) 86 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64) 87 !10 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 88 !11 = !{!12, !13} 89 !12 = !DILocalVariable(name: "argv", arg: 2, scope: !4, file: !1, line: 4, type: !8) 90 !13 = !DILocalVariable(name: "argc", arg: 1, scope: !4, file: !1, line: 4, type: !7) 91 !14 = !{!15} 92 !15 = !DIGlobalVariable(name: "x", scope: !0, file: !1, line: 1, type: !16, isLocal: false, isDefinition: true, variable: i32* @x) 93 !16 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7) 94 !17 = !{i32 2, !"Dwarf Version", i32 4} 95 !18 = !{i32 2, !"Debug Info Version", i32 3} 96 !19 = !{i32 1, !"PIC Level", i32 2} 97 !20 = !{!"clang version 3.9.0 (trunk 260617) (llvm/trunk 260619)"} 98 !21 = !DIExpression() 99 !22 = !DILocation(line: 4, column: 27, scope: !4) 100 !23 = !DILocation(line: 4, column: 14, scope: !4) 101 !24 = !DILocation(line: 5, column: 5, scope: !4) 102 !25 = !{!26, !26, i64 0} 103 !26 = !{!"int", !27, i64 0} 104 !27 = !{!"omnipotent char", !28, i64 0} 105 !28 = !{!"Simple C/C++ TBAA"} 106 !29 = !DILocation(line: 6, column: 3, scope: !4) 107 !30 = !DILocation(line: 7, column: 5, scope: !4) 108 !31 = !DILocation(line: 8, column: 7, scope: !32) 109 !32 = distinct !DILexicalBlock(scope: !4, file: !1, line: 8, column: 7) 110 !33 = !DILocation(line: 8, column: 7, scope: !4) 111 !34 = !DILocation(line: 9, column: 7, scope: !35) 112 !35 = distinct !DILexicalBlock(scope: !32, file: !1, line: 8, column: 10) 113 !36 = !DILocation(line: 10, column: 3, scope: !35) 114 !37 = !DILocation(line: 11, column: 7, scope: !38) 115 !38 = distinct !DILexicalBlock(scope: !32, file: !1, line: 10, column: 10) 116 !39 = !DILocation(line: 13, column: 1, scope: !4) 117
