1 # RUN: llc -verify-machineinstrs -start-after=prologepilog -filetype=obj -o - %s | llvm-dwarfdump -v --debug-info - | FileCheck %s 2 # CHECK: .debug_info contents: 3 # CHECK: DW_TAG_variable 4 # CHECK-NEXT: DW_AT_location {{.*}} (DW_OP_reg1 RDX, DW_OP_bit_piece 0x8 0x8) 5 # CHECK-NEXT: DW_AT_name {{.*}}"dh" 6 --- | 7 ; Manually created after: 8 ; char f(int i) { 9 ; char dh = i>>8; 10 ; return dh; 11 ; } 12 13 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 14 target triple = "x86_64-apple-macosx10.12.0" 15 16 define signext i8 @f(i32 %i) local_unnamed_addr #0 !dbg !7 { 17 entry: 18 tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !13, metadata !15), !dbg !16 19 %shr1 = lshr i32 %i, 8, !dbg !17 20 %conv = trunc i32 %shr1 to i8, !dbg !18 21 tail call void @llvm.dbg.value(metadata i8 %conv, i64 0, metadata !14, metadata !15), !dbg !19 22 ret i8 %conv, !dbg !20 23 } 24 25 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0 26 27 attributes #0 = { nounwind readnone } 28 29 !llvm.dbg.cu = !{!0} 30 !llvm.module.flags = !{!3, !4, !5} 31 !llvm.ident = !{!6} 32 33 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 288677) (llvm/trunk 288679)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 34 !1 = !DIFile(filename: "t.c", directory: "/") 35 !2 = !{} 36 !3 = !{i32 2, !"Dwarf Version", i32 4} 37 !4 = !{i32 2, !"Debug Info Version", i32 3} 38 !5 = !{i32 1, !"PIC Level", i32 2} 39 !6 = !{!"clang version 4.0.0 (trunk 288677) (llvm/trunk 288679)"} 40 !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12) 41 !8 = !DISubroutineType(types: !9) 42 !9 = !{!10, !11} 43 !10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 44 !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 45 !12 = !{!13, !14} 46 !13 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !11) 47 !14 = !DILocalVariable(name: "dh", scope: !7, file: !1, line: 2, type: !10) 48 !15 = !DIExpression() 49 !16 = !DILocation(line: 1, column: 12, scope: !7) 50 !17 = !DILocation(line: 2, column: 14, scope: !7) 51 !18 = !DILocation(line: 2, column: 13, scope: !7) 52 !19 = !DILocation(line: 2, column: 8, scope: !7) 53 !20 = !DILocation(line: 3, column: 3, scope: !7) 54 55 ... 56 --- 57 name: f 58 alignment: 4 59 exposesReturnsTwice: false 60 legalized: false 61 regBankSelected: false 62 selected: false 63 tracksRegLiveness: true 64 liveins: 65 - { reg: '$edi' } 66 frameInfo: 67 isFrameAddressTaken: false 68 isReturnAddressTaken: false 69 hasStackMap: false 70 hasPatchPoint: false 71 stackSize: 8 72 offsetAdjustment: 0 73 maxAlignment: 0 74 adjustsStack: false 75 hasCalls: false 76 maxCallFrameSize: 0 77 hasOpaqueSPAdjustment: false 78 hasVAStart: false 79 hasMustTailInVarArgFunc: false 80 fixedStack: 81 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 } 82 body: | 83 bb.0.entry: 84 liveins: $edi, $rbp 85 86 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp 87 CFI_INSTRUCTION def_cfa_offset 16 88 CFI_INSTRUCTION offset $rbp, -16 89 $rbp = frame-setup MOV64rr $rsp 90 CFI_INSTRUCTION def_cfa_register $rbp 91 DBG_VALUE debug-use $dh, debug-use _, !14, !15, debug-location !16 92 $edi = SHR32ri killed $edi, 8, implicit-def dead $eflags, debug-location !17 93 $eax = MOVSX32rr8 $dil, implicit killed $edi, debug-location !20 94 $rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !20 95 RETQ $eax, debug-location !20 96 97 ... 98
