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' 30source_filename = "test/DebugInfo/X86/dbg-value-regmask-clobber.ll" 31target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 32target 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 37define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 !dbg !12 { 38entry: 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 48if.then: ; preds = %entry 49 store volatile i32 3, i32* @x, align 4, !dbg !34, !tbaa !25 50 br label %if.end, !dbg !36 51 52if.else: ; preds = %entry 53 54 store volatile i32 4, i32* @x, align 4, !dbg !37, !tbaa !25 55 br label %if.end 56 57if.end: ; preds = %if.else, %if.then 58 ret i32 0, !dbg !39 59} 60 61declare void @clobber() 62 63; Function Attrs: nounwind readnone 64declare void @llvm.dbg.value(metadata, metadata, metadata) #1 65 66attributes #0 = { nounwind uwtable } 67attributes #1 = { nounwind readnone } 68attributes #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