1 ; RUN: llc %s -stop-before=finalize-isel -o -\
2 ; RUN: -experimental-debug-variable-locations \
5 ; Test that instruction referencing variable locations can cope with exception
6 ; landing pads. Variable locations can be derived from the ABI-defined arguments
7 ; to landing-pad blocks, which should be treated much like argument locations.
8 ; This gloriously simple piece of C++:
10 ; void a() try { a(); } catch (int *&) { }
12 ; Produces the code below. A nameless variable is attached to the landing-pad
13 ; record %0 (via %3), which salvages back to the entry to the landing pad. We
14 ; should place a DBG_PHI at that point. Instead of crashing.
16 ; CHECK-LABEL: bb.1.lpad (landing-pad):
17 ; CHECK: DBG_PHI $rax, 1
18 ; CHECK-NEXT: EH_LABEL
20 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
21 target triple = "x86_64-unknown-linux-gnu"
23 @_ZTIPi = external dso_local constant ptr
25 define dso_local void @_Z1av() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 !dbg !8 {
28 to label %try.cont unwind label %lpad, !dbg !17
30 lpad: ; preds = %entry
31 %0 = landingpad { ptr, i32 }
32 catch ptr @_ZTIPi, !dbg !19
33 %1 = extractvalue { ptr, i32 } %0, 1, !dbg !19
34 %2 = tail call i32 @llvm.eh.typeid.for(ptr @_ZTIPi) #3, !dbg !20
35 %matches = icmp eq i32 %1, %2, !dbg !20
36 br i1 %matches, label %catch, label %eh.resume, !dbg !20
38 catch: ; preds = %lpad
39 %3 = extractvalue { ptr, i32 } %0, 0, !dbg !19
40 %4 = tail call ptr @__cxa_begin_catch(ptr %3) #3, !dbg !20
41 call void @llvm.dbg.value(metadata ptr %3, metadata !13, metadata !DIExpression(DW_OP_plus_uconst, 32, DW_OP_stack_value)), !dbg !21
42 tail call void @__cxa_end_catch() #3, !dbg !22
43 br label %try.cont, !dbg !22
45 try.cont: ; preds = %entry, %catch
48 eh.resume: ; preds = %lpad
49 resume { ptr, i32 } %0, !dbg !20
52 declare dso_local i32 @__gxx_personality_v0(...)
54 ; Function Attrs: nofree nosync nounwind readnone
55 declare i32 @llvm.eh.typeid.for(ptr) #1
57 declare dso_local ptr @__cxa_begin_catch(ptr) local_unnamed_addr
59 declare dso_local void @__cxa_end_catch() local_unnamed_addr
61 ; Function Attrs: mustprogress nofree nosync nounwind readnone speculatable willreturn
62 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
65 !llvm.module.flags = !{!3, !4, !5, !6}
68 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
69 !1 = !DIFile(filename: "test.cpp", directory: ".")
71 !3 = !{i32 7, !"Dwarf Version", i32 4}
72 !4 = !{i32 2, !"Debug Info Version", i32 3}
73 !5 = !{i32 1, !"wchar_size", i32 4}
74 !6 = !{i32 7, !"uwtable", i32 1}
76 !8 = distinct !DISubprogram(name: "a", linkageName: "_Z1av", scope: !9, file: !9, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
77 !9 = !DIFile(filename: "test.cpp", directory: "")
78 !10 = !DISubroutineType(types: !11)
81 !13 = !DILocalVariable(scope: !8, file: !9, line: 1, type: !14)
82 !14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15, size: 64)
83 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
84 !16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
85 !17 = !DILocation(line: 1, column: 16, scope: !18)
86 !18 = distinct !DILexicalBlock(scope: !8, file: !9, line: 1, column: 14)
87 !19 = !DILocation(line: 2, column: 1, scope: !18)
88 !20 = !DILocation(line: 1, column: 21, scope: !18)
89 !21 = !DILocation(line: 0, scope: !8)
90 !22 = !DILocation(line: 2, column: 1, scope: !23)
91 !23 = distinct !DILexicalBlock(scope: !8, file: !9, line: 1, column: 38)
92 !24 = !DILocation(line: 2, column: 1, scope: !8)