1 # RUN: llc -verify-machineinstrs -start-after=virtregrewriter -filetype=obj -o - %s | llvm-dwarfdump -a - | FileCheck %s
3 # This testcase has an implicit def pseudo-instruction with a debug location.
5 # CHECK: .debug_info contents:
6 # CHECK: DW_TAG_subprogram
7 # CHECK: DW_AT_low_pc (0x0000000000000000)
9 # CHECK: DW_AT_specification {{.*}} "_ZN1C5m_fn3Ev"
11 # Here should not be an inlined subroutine with 0 length.
14 # CHECK: Address Line Column File ISA Discriminator Flags
16 # CHECK-NEXT: 25 0 1 0 0 is_stmt
17 # CHECK-NEXT: 29 28 1 0 0 is_stmt prologue_end
18 # CHECK-NEXT: 29 28 1 0 0 is_stmt end_sequence
20 source_filename = "t.ll"
21 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
22 target triple = "x86_64-apple-macosx"
24 %class.E = type { %class.D }
25 %class.D = type { %class.B }
26 %class.B = type { %class.A, %class.A }
27 %class.A = type { i8 }
28 %class.C = type <{ %class.E*, %class.B, [2 x i8] }>
30 @a = local_unnamed_addr global %class.E* null, align 4
32 define i32 @_ZN1C5m_fn3Ev(%class.C* nocapture) local_unnamed_addr align 2 !dbg !6 {
33 %2 = alloca %class.B, align 1
34 %3 = load %class.E*, %class.E** @a, align 4
35 %4 = icmp eq %class.E* %3, null
36 br i1 %4, label %10, label %5
38 ; <label>:5: ; preds = %1
39 %6 = bitcast %class.C* %0 to %class.D**
40 %7 = load %class.D*, %class.D** %6, align 4
41 %8 = bitcast %class.D* %7 to i8*
42 %9 = load i8, i8* %8, align 1
45 ; <label>:10: ; preds = %5, %1
46 %11 = phi i8 [ %9, %5 ], [ undef, %1 ], !dbg !10
47 %12 = getelementptr inbounds %class.C, %class.C* %0, i32 0, i32 1, i32 0, i32 0
48 store i8 %11, i8* %12, align 1, !dbg !14
53 !llvm.module.flags = !{!3, !4, !5}
55 !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)
56 !1 = !DIFile(filename: "test.ii", directory: "/")
58 !3 = !{i32 2, !"Dwarf Version", i32 4}
59 !4 = !{i32 2, !"Debug Info Version", i32 3}
60 !5 = !{i32 1, !"PIC Level", i32 2}
61 !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)
62 !7 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "C", file: !1, line: 14, size: 64, align: 32, elements: !2, identifier: "_ZTS1C")
63 !8 = !DISubroutineType(types: !2)
64 !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)
65 !10 = !DILocation(line: 99, column: 9, scope: !11, inlinedAt: !14)
66 !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)
67 !12 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "A", file: !1, line: 1, size: 8, align: 8, elements: !2, identifier: "_ZTS1A")
68 !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)
69 !14 = !DILocation(line: 29, column: 28, scope: !6)
75 exposesReturnsTwice: false
77 regBankSelected: false
79 tracksRegLiveness: true
83 isFrameAddressTaken: false
84 isReturnAddressTaken: false
93 hasOpaqueSPAdjustment: false
95 hasMustTailInVarArgFunc: false
97 # - { id: 0, name: '<unnamed alloca>', offset: -16, size: 2, alignment: 8 }
100 successors: %bb.1(0x30000000), %bb.2(0x50000000)
103 CMP64mi8 $rip, 1, _, @a, _, 0, implicit-def $eflags :: (dereferenceable load 8 from @a, align 4)
104 JCC_1 %bb.1, 4, implicit $eflags
109 $rax = MOV64rm $rdi, 1, _, 0, _ :: (load 8 from %ir.6, align 4)
110 $al = MOV8rm killed $rax, 1, _, 0, _ :: (load 1 from %ir.8)
111 MOV8mr killed $rdi, 1, _, 8, _, killed $al, debug-location !14 :: (store 1 into %ir.12)
117 $al = IMPLICIT_DEF debug-location !10
118 MOV8mr killed $rdi, 1, _, 8, _, killed $al, debug-location !14 :: (store 1 into %ir.12)