# RUN: llc -verify-machineinstrs -start-after=virtregrewriter -filetype=obj -o - %s | llvm-dwarfdump -a - | FileCheck %s
#
# This testcase has an implicit def pseudo-instruction with a debug location.
#
# CHECK: .debug_info contents:
# CHECK: DW_TAG_subprogram
# CHECK: DW_AT_low_pc (0x0000000000000000)
# CHECK-NOT: DW_TAG
# CHECK: DW_AT_specification {{.*}} "_ZN1C5m_fn3Ev"
# CHECK-NOT: DW_TAG
# Here should not be an inlined subroutine with 0 length.
# CHECK: NULL
#
# CHECK: Address Line Column File ISA Discriminator OpIndex Flags
# CHECK-NEXT: ---
# CHECK-NEXT: 25 0 1 0 0 0 is_stmt
# CHECK-NEXT: 29 28 1 0 0 0 is_stmt prologue_end
# CHECK-NEXT: 29 28 1 0 0 0 is_stmt end_sequence
--- |
source_filename = "t.ll"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx"
%class.E = type { %class.D }
%class.D = type { %class.B }
%class.B = type { %class.A, %class.A }
%class.A = type { i8 }
%class.C = type <{ ptr, %class.B, [2 x i8] }>
@a = local_unnamed_addr global ptr null, align 4
define i32 @_ZN1C5m_fn3Ev(ptr nocapture) local_unnamed_addr align 2 !dbg !6 {
%2 = alloca %class.B, align 1
%3 = load ptr, ptr @a, align 4
%4 = icmp eq ptr %3, null
br i1 %4, label %10, label %5
; <label>:5: ; preds = %1
%6 = bitcast ptr %0 to ptr
%7 = load ptr, ptr %6, align 4
%8 = bitcast ptr %7 to ptr
%9 = load i8, ptr %8, align 1
br label %10
; <label>:10: ; preds = %5, %1
%11 = phi i8 [ %9, %5 ], [ undef, %1 ], !dbg !10
%12 = getelementptr inbounds %class.C, ptr %0, i32 0, i32 1, i32 0, i32 0
store i8 %11, ptr %12, align 1, !dbg !14
ret i32 undef
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "Apple LLVM version 8.1.0 (clang-802.0.30.3)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !2)
!1 = !DIFile(filename: "test.ii", 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 = distinct !DISubprogram(name: "m_fn3", linkageName: "_ZN1C5m_fn3Ev", scope: !7, file: !1, line: 25, type: !8, isLocal: false, isDefinition: true, scopeLine: 25, flags: DIFlagPrototyped, isOptimized: true, unit: !0, declaration: !9, retainedNodes: !2)
!7 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "C", file: !1, line: 14, size: 64, align: 32, elements: !2, identifier: "_ZTS1C")
!8 = !DISubroutineType(types: !2)
!9 = !DISubprogram(name: "m_fn3", linkageName: "_ZN1C5m_fn3Ev", scope: !7, file: !1, line: 15, type: !8, isLocal: false, isDefinition: false, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: true)
!10 = !DILocation(line: 99, column: 9, scope: !11, inlinedAt: !14)
!11 = distinct !DISubprogram(name: "m_fn1", linkageName: "_ZN1A5m_fn1Ev", scope: !12, file: !1, line: 5, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, declaration: !13, retainedNodes: !2)
!12 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "A", file: !1, line: 1, size: 8, align: 8, elements: !2, identifier: "_ZTS1A")
!13 = !DISubprogram(name: "m_fn1", linkageName: "_ZN1A5m_fn1Ev", scope: !12, file: !1, line: 5, type: !8, isLocal: false, isDefinition: false, scopeLine: 5, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: true)
!14 = !DILocation(line: 29, column: 28, scope: !6)
...
---
name: _ZN1C5m_fn3Ev
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
liveins:
- { reg: '$rdi' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 8
adjustsStack: false
hasCalls: false
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
#stack:
# - { id: 0, name: '<unnamed alloca>', offset: -16, size: 2, alignment: 8 }
body: |
bb.0 (%ir-block.1):
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $rdi
CMP64mi32 $rip, 1, _, @a, _, 0, implicit-def $eflags :: (dereferenceable load (s64) from @a, align 4)
JCC_1 %bb.1, 4, implicit $eflags
bb.2 (%ir-block.5):
liveins: $rdi
$rax = MOV64rm $rdi, 1, _, 0, _ :: (load (s64) from %ir.6, align 4)
$al = MOV8rm killed $rax, 1, _, 0, _ :: (load (s8) from %ir.8)
MOV8mr killed $rdi, 1, _, 8, _, killed $al, debug-location !14 :: (store (s8) into %ir.12)
RET64 undef $eax
bb.1:
liveins: $rdi
$al = IMPLICIT_DEF debug-location !10
MOV8mr killed $rdi, 1, _, 8, _, killed $al, debug-location !14 :: (store (s8) into %ir.12)
RET64 undef $eax
...
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