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1# RUN: llc -verify-machineinstrs -start-after=prologepilog -filetype=obj -o - %s | llvm-dwarfdump -v --debug-info - | FileCheck %s2# CHECK: .debug_info contents:3# CHECK: DW_TAG_variable4# 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 !1619 %shr1 = lshr i32 %i, 8, !dbg !1720 %conv = trunc i32 %shr1 to i8, !dbg !1821 tail call void @llvm.dbg.value(metadata i8 %conv, i64 0, metadata !14, metadata !15), !dbg !1922 ret i8 %conv, !dbg !2023 }24 25 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #026 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---57name: f58alignment: 1659exposesReturnsTwice: false60legalized: false61regBankSelected: false62selected: false63tracksRegLiveness: true64liveins: 65 - { reg: '$edi' }66frameInfo: 67 isFrameAddressTaken: false68 isReturnAddressTaken: false69 hasStackMap: false70 hasPatchPoint: false71 stackSize: 872 offsetAdjustment: 073 maxAlignment: 074 adjustsStack: false75 hasCalls: false76 maxCallFrameSize: 077 hasOpaqueSPAdjustment: false78 hasVAStart: false79 hasMustTailInVarArgFunc: false80fixedStack: 81 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 }82body: |83 bb.0.entry:84 liveins: $edi, $rbp85 86 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp87 CFI_INSTRUCTION def_cfa_offset 1688 CFI_INSTRUCTION offset $rbp, -1689 $rbp = frame-setup MOV64rr $rsp90 CFI_INSTRUCTION def_cfa_register $rbp91 DBG_VALUE $dh, _, !14, !15, debug-location !1692 $edi = SHR32ri killed $edi, 8, implicit-def dead $eflags, debug-location !1793 $eax = MOVSX32rr8 $dil, implicit killed $edi, debug-location !2094 $rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !2095 RET64 $eax, debug-location !2096 97...98