1 ; RUN: llc < %s | FileCheck %s --check-prefix=ASM 2 ; RUN: llc < %s -filetype=obj | llvm-dwarfdump -v - | 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 1 # Loc expr size 20 ; ASM-NEXT: .byte 82 # super-register DW_OP_reg2 21 22 ; argc is the first formal parameter. 23 ; DWARF: .debug_info contents: 24 ; DWARF: DW_TAG_formal_parameter 25 ; DWARF-NEXT: DW_AT_location [DW_FORM_sec_offset] ({{0x.*}} 26 ; DWARF-NEXT: [0x0000000000000000, 0x0000000000000013): DW_OP_reg2 RCX) 27 ; DWARF-NEXT: DW_AT_name [DW_FORM_strp] {{.*}} "argc" 28 29 ; ModuleID = 't.cpp' 30 source_filename = "test/DebugInfo/X86/dbg-value-regmask-clobber.ll" 31 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 32 target triple = "x86_64-pc-windows-msvc18.0.0" 33 34 @x = common global i32 0, align 4, !dbg !0 35 36 ; Function Attrs: nounwind uwtable 37 define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 !dbg !12 { 38 entry: 39 tail call void @llvm.dbg.value(metadata i8** %argv, metadata !19, metadata !21), !dbg !22 40 tail call void @llvm.dbg.value(metadata i32 %argc, metadata !20, metadata !21), !dbg !23 41 store volatile i32 1, i32* @x, align 4, !dbg !24, !tbaa !25 42 tail call void @clobber() #2, !dbg !29 43 store volatile i32 2, i32* @x, align 4, !dbg !30, !tbaa !25 44 %0 = load volatile i32, i32* @x, align 4, !dbg !31, !tbaa !25 45 %tobool = icmp eq i32 %0, 0, !dbg !31 46 br i1 %tobool, label %if.else, label %if.then, !dbg !33 47 48 if.then: ; preds = %entry 49 store volatile i32 3, i32* @x, align 4, !dbg !34, !tbaa !25 50 br label %if.end, !dbg !36 51 52 if.else: ; preds = %entry 53 54 store volatile i32 4, i32* @x, align 4, !dbg !37, !tbaa !25 55 br label %if.end 56 57 if.end: ; preds = %if.else, %if.then 58 ret i32 0, !dbg !39 59 } 60 61 declare void @clobber() 62 63 ; Function Attrs: nounwind readnone 64 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 65 66 attributes #0 = { nounwind uwtable } 67 attributes #1 = { nounwind readnone } 68 attributes #2 = { nounwind } 69 70 !llvm.dbg.cu = !{!2} 71 !llvm.module.flags = !{!8, !9, !10} 72 !llvm.ident = !{!11} 73 74 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 75 !1 = !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true) 76 !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) 77 !3 = !DIFile(filename: "t.cpp", directory: "D:\5Csrc\5Cllvm\5Cbuild") 78 !4 = !{} 79 !5 = !{!0} 80 !6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7) 81 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 82 !8 = !{i32 2, !"Dwarf Version", i32 4} 83 !9 = !{i32 2, !"Debug Info Version", i32 3} 84 !10 = !{i32 1, !"PIC Level", i32 2} 85 !11 = !{!"clang version 3.9.0 (trunk 260617) (llvm/trunk 260619)"} 86 !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, retainedNodes: !18) 87 !13 = !DISubroutineType(types: !14) 88 !14 = !{!7, !7, !15} 89 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64, align: 64) 90 !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 64, align: 64) 91 !17 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 92 !18 = !{!19, !20} 93 !19 = !DILocalVariable(name: "argv", arg: 2, scope: !12, file: !3, line: 4, type: !15) 94 !20 = !DILocalVariable(name: "argc", arg: 1, scope: !12, file: !3, line: 4, type: !7) 95 !21 = !DIExpression() 96 !22 = !DILocation(line: 4, column: 27, scope: !12) 97 !23 = !DILocation(line: 4, column: 14, scope: !12) 98 !24 = !DILocation(line: 5, column: 5, scope: !12) 99 !25 = !{!26, !26, i64 0} 100 !26 = !{!"int", !27, i64 0} 101 !27 = !{!"omnipotent char", !28, i64 0} 102 !28 = !{!"Simple C/C++ TBAA"} 103 !29 = !DILocation(line: 6, column: 3, scope: !12) 104 !30 = !DILocation(line: 7, column: 5, scope: !12) 105 !31 = !DILocation(line: 8, column: 7, scope: !32) 106 !32 = distinct !DILexicalBlock(scope: !12, file: !3, line: 8, column: 7) 107 !33 = !DILocation(line: 8, column: 7, scope: !12) 108 !34 = !DILocation(line: 9, column: 7, scope: !35) 109 !35 = distinct !DILexicalBlock(scope: !32, file: !3, line: 8, column: 10) 110 !36 = !DILocation(line: 10, column: 3, scope: !35) 111 !37 = !DILocation(line: 11, column: 7, scope: !38) 112 !38 = distinct !DILexicalBlock(scope: !32, file: !3, line: 10, column: 10) 113 !39 = !DILocation(line: 13, column: 1, scope: !12) 114 115
