| ; RUN: llc %s -stop-before=finalize-isel -o -\ |
| ; RUN: -experimental-debug-variable-locations \ |
| ; RUN: | FileCheck %s |
| ; |
| ; Test that instruction referencing variable locations can cope with exception |
| ; landing pads. Variable locations can be derived from the ABI-defined arguments |
| ; to landing-pad blocks, which should be treated much like argument locations. |
| ; This gloriously simple piece of C++: |
| ; |
| ; void a() try { a(); } catch (int *&) { } |
| ; |
| ; Produces the code below. A nameless variable is attached to the landing-pad |
| ; record %0 (via %3), which salvages back to the entry to the landing pad. We |
| ; should place a DBG_PHI at that point. Instead of crashing. |
| ; |
| ; CHECK-LABEL: bb.1.lpad (landing-pad): |
| ; CHECK: DBG_PHI $rax, 1 |
| ; CHECK-NEXT: EH_LABEL |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @_ZTIPi = external dso_local constant ptr |
| |
| define dso_local void @_Z1av() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 !dbg !8 { |
| entry: |
| invoke void @_Z1av() |
| to label %try.cont unwind label %lpad, !dbg !17 |
| |
| lpad: ; preds = %entry |
| %0 = landingpad { ptr, i32 } |
| catch ptr @_ZTIPi, !dbg !19 |
| %1 = extractvalue { ptr, i32 } %0, 1, !dbg !19 |
| %2 = tail call i32 @llvm.eh.typeid.for(ptr @_ZTIPi) #3, !dbg !20 |
| %matches = icmp eq i32 %1, %2, !dbg !20 |
| br i1 %matches, label %catch, label %eh.resume, !dbg !20 |
| |
| catch: ; preds = %lpad |
| %3 = extractvalue { ptr, i32 } %0, 0, !dbg !19 |
| %4 = tail call ptr @__cxa_begin_catch(ptr %3) #3, !dbg !20 |
| call void @llvm.dbg.value(metadata ptr %3, metadata !13, metadata !DIExpression(DW_OP_plus_uconst, 32, DW_OP_stack_value)), !dbg !21 |
| tail call void @__cxa_end_catch() #3, !dbg !22 |
| br label %try.cont, !dbg !22 |
| |
| try.cont: ; preds = %entry, %catch |
| ret void, !dbg !24 |
| |
| eh.resume: ; preds = %lpad |
| resume { ptr, i32 } %0, !dbg !20 |
| } |
| |
| declare dso_local i32 @__gxx_personality_v0(...) |
| |
| ; Function Attrs: nofree nosync nounwind readnone |
| declare i32 @llvm.eh.typeid.for(ptr) #1 |
| |
| declare dso_local ptr @__cxa_begin_catch(ptr) local_unnamed_addr |
| |
| declare dso_local void @__cxa_end_catch() local_unnamed_addr |
| |
| ; Function Attrs: mustprogress nofree nosync nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !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) |
| !1 = !DIFile(filename: "test.cpp", directory: ".") |
| !2 = !{} |
| !3 = !{i32 7, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{i32 7, !"uwtable", i32 1} |
| !7 = !{!"clang"} |
| !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) |
| !9 = !DIFile(filename: "test.cpp", directory: "") |
| !10 = !DISubroutineType(types: !11) |
| !11 = !{null} |
| !12 = !{!13} |
| !13 = !DILocalVariable(scope: !8, file: !9, line: 1, type: !14) |
| !14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15, size: 64) |
| !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64) |
| !16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !17 = !DILocation(line: 1, column: 16, scope: !18) |
| !18 = distinct !DILexicalBlock(scope: !8, file: !9, line: 1, column: 14) |
| !19 = !DILocation(line: 2, column: 1, scope: !18) |
| !20 = !DILocation(line: 1, column: 21, scope: !18) |
| !21 = !DILocation(line: 0, scope: !8) |
| !22 = !DILocation(line: 2, column: 1, scope: !23) |
| !23 = distinct !DILexicalBlock(scope: !8, file: !9, line: 1, column: 38) |
| !24 = !DILocation(line: 2, column: 1, scope: !8) |