forked from OSchip/llvm-project
93 lines
4.1 KiB
LLVM
93 lines
4.1 KiB
LLVM
; RUN: llc %s -stop-before=finalize-isel -o -\
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; RUN: -experimental-debug-variable-locations \
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; RUN: | FileCheck %s
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;
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; Test that instruction referencing variable locations can cope with exception
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; landing pads. Variable locations can be derived from the ABI-defined arguments
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; to landing-pad blocks, which should be treated much like argument locations.
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; This gloriously simple piece of C++:
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;
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; void a() try { a(); } catch (int *&) { }
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;
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; Produces the code below. A nameless variable is attached to the landing-pad
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; record %0 (via %3), which salvages back to the entry to the landing pad. We
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; should place a DBG_PHI at that point. Instead of crashing.
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;
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; CHECK-LABEL: bb.1.lpad (landing-pad):
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; CHECK: DBG_PHI $rax, 1
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; CHECK-NEXT: EH_LABEL
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@_ZTIPi = external dso_local constant i8*
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define dso_local void @_Z1av() local_unnamed_addr #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) !dbg !8 {
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entry:
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invoke void @_Z1av()
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to label %try.cont unwind label %lpad, !dbg !17
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lpad: ; preds = %entry
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%0 = landingpad { i8*, i32 }
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catch i8* bitcast (i8** @_ZTIPi to i8*), !dbg !19
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%1 = extractvalue { i8*, i32 } %0, 1, !dbg !19
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%2 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIPi to i8*)) #3, !dbg !20
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%matches = icmp eq i32 %1, %2, !dbg !20
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br i1 %matches, label %catch, label %eh.resume, !dbg !20
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catch: ; preds = %lpad
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%3 = extractvalue { i8*, i32 } %0, 0, !dbg !19
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%4 = tail call i8* @__cxa_begin_catch(i8* %3) #3, !dbg !20
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call void @llvm.dbg.value(metadata i8* %3, metadata !13, metadata !DIExpression(DW_OP_plus_uconst, 32, DW_OP_stack_value)), !dbg !21
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tail call void @__cxa_end_catch() #3, !dbg !22
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br label %try.cont, !dbg !22
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try.cont: ; preds = %entry, %catch
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ret void, !dbg !24
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eh.resume: ; preds = %lpad
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resume { i8*, i32 } %0, !dbg !20
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}
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declare dso_local i32 @__gxx_personality_v0(...)
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; Function Attrs: nofree nosync nounwind readnone
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declare i32 @llvm.eh.typeid.for(i8*) #1
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declare dso_local i8* @__cxa_begin_catch(i8*) local_unnamed_addr
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declare dso_local void @__cxa_end_catch() local_unnamed_addr
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; Function Attrs: mustprogress nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!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)
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!1 = !DIFile(filename: "test.cpp", directory: ".")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"uwtable", i32 1}
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!7 = !{!"clang"}
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!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)
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!9 = !DIFile(filename: "test.cpp", directory: "")
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!10 = !DISubroutineType(types: !11)
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!11 = !{null}
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!12 = !{!13}
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!13 = !DILocalVariable(scope: !8, file: !9, line: 1, type: !14)
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!14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15, size: 64)
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!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
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!16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!17 = !DILocation(line: 1, column: 16, scope: !18)
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!18 = distinct !DILexicalBlock(scope: !8, file: !9, line: 1, column: 14)
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!19 = !DILocation(line: 2, column: 1, scope: !18)
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!20 = !DILocation(line: 1, column: 21, scope: !18)
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!21 = !DILocation(line: 0, scope: !8)
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!22 = !DILocation(line: 2, column: 1, scope: !23)
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!23 = distinct !DILexicalBlock(scope: !8, file: !9, line: 1, column: 38)
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!24 = !DILocation(line: 2, column: 1, scope: !8)
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