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| # RUN: llc -verify-machineinstrs -start-after=prologepilog -filetype=obj -o - %s | llvm-dwarfdump -v --debug-info - | FileCheck %s
# CHECK: .debug_info contents:
# CHECK: DW_TAG_variable
# CHECK-NEXT: DW_AT_location {{.*}} (DW_OP_reg1 RDX, DW_OP_bit_piece 0x8 0x8)
# CHECK-NEXT: DW_AT_name {{.*}}"dh"
--- |
; Manually created after:
; char f(int i) {
; char dh = i>>8;
; return dh;
; }
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.12.0"
define signext i8 @f(i32 %i) local_unnamed_addr #0 !dbg !7 {
entry:
tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !13, metadata !15), !dbg !16
%shr1 = lshr i32 %i, 8, !dbg !17
%conv = trunc i32 %shr1 to i8, !dbg !18
tail call void @llvm.dbg.value(metadata i8 %conv, i64 0, metadata !14, metadata !15), !dbg !19
ret i8 %conv, !dbg !20
}
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0
attributes #0 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!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)
!1 = !DIFile(filename: "t.c", directory: "/")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 4.0.0 (trunk 288677) (llvm/trunk 288679)"}
!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)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !11}
!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !{!13, !14}
!13 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !11)
!14 = !DILocalVariable(name: "dh", scope: !7, file: !1, line: 2, type: !10)
!15 = !DIExpression()
!16 = !DILocation(line: 1, column: 12, scope: !7)
!17 = !DILocation(line: 2, column: 14, scope: !7)
!18 = !DILocation(line: 2, column: 13, scope: !7)
!19 = !DILocation(line: 2, column: 8, scope: !7)
!20 = !DILocation(line: 3, column: 3, scope: !7)
...
---
name: f
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
liveins:
- { reg: '$edi' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 8
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: false
hasCalls: false
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 }
body: |
bb.0.entry:
liveins: $edi, $rbp
frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbp, -16
$rbp = frame-setup MOV64rr $rsp
CFI_INSTRUCTION def_cfa_register $rbp
DBG_VALUE $dh, _, !14, !15, debug-location !16
$edi = SHR32ri killed $edi, 8, implicit-def dead $eflags, debug-location !17
$eax = MOVSX32rr8 $dil, implicit killed $edi, debug-location !20
$rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !20
RETQ $eax, debug-location !20
...
|