Index: llvm/trunk/lib/Target/BPF/BPFAbstractMemberAccess.cpp =================================================================== --- llvm/trunk/lib/Target/BPF/BPFAbstractMemberAccess.cpp +++ llvm/trunk/lib/Target/BPF/BPFAbstractMemberAccess.cpp @@ -90,6 +90,13 @@ static char ID; BPFAbstractMemberAccess() : ModulePass(ID) {} + struct CallInfo { + uint32_t Kind; + uint32_t AccessIndex; + MDNode *Metadata; + Value *Base; + }; + private: enum : uint32_t { BPFPreserveArrayAI = 1, @@ -99,34 +106,32 @@ std::map GEPGlobals; // A map to link preserve_*_access_index instrinsic calls. - std::map> AIChain; + std::map> AIChain; // A map to hold all the base preserve_*_access_index instrinsic calls. // The base call is not an input of any other preserve_*_access_index // intrinsics. - std::map BaseAICalls; + std::map BaseAICalls; bool doTransformation(Module &M); - void traceAICall(CallInst *Call, uint32_t Kind, const MDNode *ParentMeta, - uint32_t ParentAI); - void traceBitCast(BitCastInst *BitCast, CallInst *Parent, uint32_t Kind, - const MDNode *ParentMeta, uint32_t ParentAI); - void traceGEP(GetElementPtrInst *GEP, CallInst *Parent, uint32_t Kind, - const MDNode *ParentMeta, uint32_t ParentAI); + void traceAICall(CallInst *Call, CallInfo &ParentInfo); + void traceBitCast(BitCastInst *BitCast, CallInst *Parent, + CallInfo &ParentInfo); + void traceGEP(GetElementPtrInst *GEP, CallInst *Parent, + CallInfo &ParentInfo); void collectAICallChains(Module &M, Function &F); - bool IsPreserveDIAccessIndexCall(const CallInst *Call, uint32_t &Kind, - const MDNode *&TypeMeta, uint32_t &AccessIndex); + bool IsPreserveDIAccessIndexCall(const CallInst *Call, CallInfo &Cinfo); bool IsValidAIChain(const MDNode *ParentMeta, uint32_t ParentAI, const MDNode *ChildMeta); bool removePreserveAccessIndexIntrinsic(Module &M); void replaceWithGEP(std::vector &CallList, uint32_t NumOfZerosIndex, uint32_t DIIndex); - Value *computeBaseAndAccessKey(CallInst *Call, std::string &AccessKey, - uint32_t Kind, MDNode *&BaseMeta); - bool getAccessIndex(const Value *IndexValue, uint64_t &AccessIndex); - bool transformGEPChain(Module &M, CallInst *Call, uint32_t Kind); + Value *computeBaseAndAccessKey(CallInst *Call, CallInfo &CInfo, + std::string &AccessKey, MDNode *&BaseMeta); + uint64_t getConstant(const Value *IndexValue); + bool transformGEPChain(Module &M, CallInst *Call, CallInfo &CInfo); }; } // End anonymous namespace @@ -192,9 +197,7 @@ /// Check whether a call is a preserve_*_access_index intrinsic call or not. bool BPFAbstractMemberAccess::IsPreserveDIAccessIndexCall(const CallInst *Call, - uint32_t &Kind, - const MDNode *&TypeMeta, - uint32_t &AccessIndex) { + CallInfo &CInfo) { if (!Call) return false; @@ -202,30 +205,30 @@ if (!GV) return false; if (GV->getName().startswith("llvm.preserve.array.access.index")) { - Kind = BPFPreserveArrayAI; - TypeMeta = Call->getMetadata(LLVMContext::MD_preserve_access_index); - if (!TypeMeta) + CInfo.Kind = BPFPreserveArrayAI; + CInfo.Metadata = Call->getMetadata(LLVMContext::MD_preserve_access_index); + if (!CInfo.Metadata) report_fatal_error("Missing metadata for llvm.preserve.array.access.index intrinsic"); - AccessIndex = cast(Call->getArgOperand(2)) - ->getZExtValue(); + CInfo.AccessIndex = getConstant(Call->getArgOperand(2)); + CInfo.Base = Call->getArgOperand(0); return true; } if (GV->getName().startswith("llvm.preserve.union.access.index")) { - Kind = BPFPreserveUnionAI; - TypeMeta = Call->getMetadata(LLVMContext::MD_preserve_access_index); - if (!TypeMeta) + CInfo.Kind = BPFPreserveUnionAI; + CInfo.Metadata = Call->getMetadata(LLVMContext::MD_preserve_access_index); + if (!CInfo.Metadata) report_fatal_error("Missing metadata for llvm.preserve.union.access.index intrinsic"); - AccessIndex = cast(Call->getArgOperand(1)) - ->getZExtValue(); + CInfo.AccessIndex = getConstant(Call->getArgOperand(1)); + CInfo.Base = Call->getArgOperand(0); return true; } if (GV->getName().startswith("llvm.preserve.struct.access.index")) { - Kind = BPFPreserveStructAI; - TypeMeta = Call->getMetadata(LLVMContext::MD_preserve_access_index); - if (!TypeMeta) + CInfo.Kind = BPFPreserveStructAI; + CInfo.Metadata = Call->getMetadata(LLVMContext::MD_preserve_access_index); + if (!CInfo.Metadata) report_fatal_error("Missing metadata for llvm.preserve.struct.access.index intrinsic"); - AccessIndex = cast(Call->getArgOperand(2)) - ->getZExtValue(); + CInfo.AccessIndex = getConstant(Call->getArgOperand(2)); + CInfo.Base = Call->getArgOperand(0); return true; } @@ -238,8 +241,7 @@ for (auto Call : CallList) { uint32_t Dimension = 1; if (DimensionIndex > 0) - Dimension = cast(Call->getArgOperand(DimensionIndex)) - ->getZExtValue(); + Dimension = getConstant(Call->getArgOperand(DimensionIndex)); Constant *Zero = ConstantInt::get(Type::getInt32Ty(Call->getParent()->getContext()), 0); @@ -265,16 +267,14 @@ for (auto &BB : F) for (auto &I : BB) { auto *Call = dyn_cast(&I); - uint32_t Kind; - const MDNode *TypeMeta; - uint32_t AccessIndex; - if (!IsPreserveDIAccessIndexCall(Call, Kind, TypeMeta, AccessIndex)) + CallInfo CInfo; + if (!IsPreserveDIAccessIndexCall(Call, CInfo)) continue; Found = true; - if (Kind == BPFPreserveArrayAI) + if (CInfo.Kind == BPFPreserveArrayAI) PreserveArrayIndexCalls.push_back(Call); - else if (Kind == BPFPreserveUnionAI) + else if (CInfo.Kind == BPFPreserveUnionAI) PreserveUnionIndexCalls.push_back(Call); else PreserveStructIndexCalls.push_back(Call); @@ -349,99 +349,94 @@ return dyn_cast(stripQualifiers(Ty)) == CTy; } -void BPFAbstractMemberAccess::traceAICall(CallInst *Call, uint32_t Kind, - const MDNode *ParentMeta, - uint32_t ParentAI) { +void BPFAbstractMemberAccess::traceAICall(CallInst *Call, + CallInfo &ParentInfo) { for (User *U : Call->users()) { Instruction *Inst = dyn_cast(U); if (!Inst) continue; if (auto *BI = dyn_cast(Inst)) { - traceBitCast(BI, Call, Kind, ParentMeta, ParentAI); + traceBitCast(BI, Call, ParentInfo); } else if (auto *CI = dyn_cast(Inst)) { - uint32_t CIKind; - const MDNode *ChildMeta; - uint32_t ChildAI; - if (IsPreserveDIAccessIndexCall(CI, CIKind, ChildMeta, ChildAI) && - IsValidAIChain(ParentMeta, ParentAI, ChildMeta)) { - AIChain[CI] = std::make_pair(Call, Kind); - traceAICall(CI, CIKind, ChildMeta, ChildAI); + CallInfo ChildInfo; + + if (IsPreserveDIAccessIndexCall(CI, ChildInfo) && + IsValidAIChain(ParentInfo.Metadata, ParentInfo.AccessIndex, + ChildInfo.Metadata)) { + AIChain[CI] = std::make_pair(Call, ParentInfo); + traceAICall(CI, ChildInfo); } else { - BaseAICalls[Call] = Kind; + BaseAICalls[Call] = ParentInfo; } } else if (auto *GI = dyn_cast(Inst)) { if (GI->hasAllZeroIndices()) - traceGEP(GI, Call, Kind, ParentMeta, ParentAI); + traceGEP(GI, Call, ParentInfo); else - BaseAICalls[Call] = Kind; + BaseAICalls[Call] = ParentInfo; } else { - BaseAICalls[Call] = Kind; + BaseAICalls[Call] = ParentInfo; } } } void BPFAbstractMemberAccess::traceBitCast(BitCastInst *BitCast, - CallInst *Parent, uint32_t Kind, - const MDNode *ParentMeta, - uint32_t ParentAI) { + CallInst *Parent, + CallInfo &ParentInfo) { for (User *U : BitCast->users()) { Instruction *Inst = dyn_cast(U); if (!Inst) continue; if (auto *BI = dyn_cast(Inst)) { - traceBitCast(BI, Parent, Kind, ParentMeta, ParentAI); + traceBitCast(BI, Parent, ParentInfo); } else if (auto *CI = dyn_cast(Inst)) { - uint32_t CIKind; - const MDNode *ChildMeta; - uint32_t ChildAI; - if (IsPreserveDIAccessIndexCall(CI, CIKind, ChildMeta, ChildAI) && - IsValidAIChain(ParentMeta, ParentAI, ChildMeta)) { - AIChain[CI] = std::make_pair(Parent, Kind); - traceAICall(CI, CIKind, ChildMeta, ChildAI); + CallInfo ChildInfo; + if (IsPreserveDIAccessIndexCall(CI, ChildInfo) && + IsValidAIChain(ParentInfo.Metadata, ParentInfo.AccessIndex, + ChildInfo.Metadata)) { + AIChain[CI] = std::make_pair(Parent, ParentInfo); + traceAICall(CI, ChildInfo); } else { - BaseAICalls[Parent] = Kind; + BaseAICalls[Parent] = ParentInfo; } } else if (auto *GI = dyn_cast(Inst)) { if (GI->hasAllZeroIndices()) - traceGEP(GI, Parent, Kind, ParentMeta, ParentAI); + traceGEP(GI, Parent, ParentInfo); else - BaseAICalls[Parent] = Kind; + BaseAICalls[Parent] = ParentInfo; } else { - BaseAICalls[Parent] = Kind; + BaseAICalls[Parent] = ParentInfo; } } } void BPFAbstractMemberAccess::traceGEP(GetElementPtrInst *GEP, CallInst *Parent, - uint32_t Kind, const MDNode *ParentMeta, - uint32_t ParentAI) { + CallInfo &ParentInfo) { for (User *U : GEP->users()) { Instruction *Inst = dyn_cast(U); if (!Inst) continue; if (auto *BI = dyn_cast(Inst)) { - traceBitCast(BI, Parent, Kind, ParentMeta, ParentAI); + traceBitCast(BI, Parent, ParentInfo); } else if (auto *CI = dyn_cast(Inst)) { - uint32_t CIKind; - const MDNode *ChildMeta; - uint32_t ChildAI; - if (IsPreserveDIAccessIndexCall(CI, CIKind, ChildMeta, ChildAI) && - IsValidAIChain(ParentMeta, ParentAI, ChildMeta)) { - AIChain[CI] = std::make_pair(Parent, Kind); - traceAICall(CI, CIKind, ChildMeta, ChildAI); + CallInfo ChildInfo; + if (IsPreserveDIAccessIndexCall(CI, ChildInfo) && + IsValidAIChain(ParentInfo.Metadata, ParentInfo.AccessIndex, + ChildInfo.Metadata)) { + AIChain[CI] = std::make_pair(Parent, ParentInfo); + traceAICall(CI, ChildInfo); } else { - BaseAICalls[Parent] = Kind; + BaseAICalls[Parent] = ParentInfo; } } else if (auto *GI = dyn_cast(Inst)) { if (GI->hasAllZeroIndices()) - traceGEP(GI, Parent, Kind, ParentMeta, ParentAI); + traceGEP(GI, Parent, ParentInfo); else - BaseAICalls[Parent] = Kind; + BaseAICalls[Parent] = ParentInfo; } else { - BaseAICalls[Parent] = Kind; + BaseAICalls[Parent] = ParentInfo; } } } @@ -452,44 +447,37 @@ for (auto &BB : F) for (auto &I : BB) { - uint32_t Kind; - const MDNode *TypeMeta; - uint32_t AccessIndex; + CallInfo CInfo; auto *Call = dyn_cast(&I); - if (!IsPreserveDIAccessIndexCall(Call, Kind, TypeMeta, AccessIndex) || + if (!IsPreserveDIAccessIndexCall(Call, CInfo) || AIChain.find(Call) != AIChain.end()) continue; - traceAICall(Call, Kind, TypeMeta, AccessIndex); + traceAICall(Call, CInfo); } } -/// Get access index from the preserve_*_access_index intrinsic calls. -bool BPFAbstractMemberAccess::getAccessIndex(const Value *IndexValue, - uint64_t &AccessIndex) { +uint64_t BPFAbstractMemberAccess::getConstant(const Value *IndexValue) { const ConstantInt *CV = dyn_cast(IndexValue); - if (!CV) - return false; - - AccessIndex = CV->getValue().getZExtValue(); - return true; + assert(CV); + return CV->getValue().getZExtValue(); } /// Compute the base of the whole preserve_*_access_index chains, i.e., the base /// pointer of the first preserve_*_access_index call, and construct the access /// string, which will be the name of a global variable. Value *BPFAbstractMemberAccess::computeBaseAndAccessKey(CallInst *Call, + CallInfo &CInfo, std::string &AccessKey, - uint32_t Kind, MDNode *&TypeMeta) { Value *Base = nullptr; std::string TypeName; - std::stack> CallStack; + std::stack> CallStack; // Put the access chain into a stack with the top as the head of the chain. while (Call) { - CallStack.push(std::make_pair(Call, Kind)); - Kind = AIChain[Call].second; + CallStack.push(std::make_pair(Call, CInfo)); + CInfo = AIChain[Call].second; Call = AIChain[Call].first; } @@ -508,14 +496,14 @@ while (CallStack.size()) { auto StackElem = CallStack.top(); Call = StackElem.first; - Kind = StackElem.second; + CInfo = StackElem.second; if (!Base) - Base = Call->getArgOperand(0); + Base = CInfo.Base; - MDNode *MDN = Call->getMetadata(LLVMContext::MD_preserve_access_index); - DIType *Ty = stripQualifiers(cast(MDN)); - if (Kind == BPFPreserveUnionAI || Kind == BPFPreserveStructAI) { + DIType *Ty = stripQualifiers(cast(CInfo.Metadata)); + if (CInfo.Kind == BPFPreserveUnionAI || + CInfo.Kind == BPFPreserveStructAI) { // struct or union type TypeName = Ty->getName(); TypeMeta = Ty; @@ -527,9 +515,7 @@ CallStack.pop(); // BPFPreserveArrayAI - uint64_t AccessIndex; - if (!getAccessIndex(Call->getArgOperand(2), AccessIndex)) - return nullptr; + uint64_t AccessIndex = CInfo.AccessIndex; DIType *BaseTy = nullptr; bool CheckElemType = false; @@ -580,18 +566,14 @@ // and access key construction. while (CallStack.size()) { auto StackElem = CallStack.top(); - Call = StackElem.first; - Kind = StackElem.second; + CInfo = StackElem.second; CallStack.pop(); // Access Index - uint64_t AccessIndex; - uint32_t ArgIndex = (Kind == BPFPreserveUnionAI) ? 1 : 2; - if (!getAccessIndex(Call->getArgOperand(ArgIndex), AccessIndex)) - return nullptr; + uint64_t AccessIndex = CInfo.AccessIndex; AccessKey += ":" + std::to_string(AccessIndex); - MDNode *MDN = Call->getMetadata(LLVMContext::MD_preserve_access_index); + MDNode *MDN = CInfo.Metadata; // At this stage, it cannot be pointer type. auto *CTy = cast(stripQualifiers(cast(MDN))); uint32_t Tag = CTy->getTag(); @@ -615,11 +597,11 @@ /// Call/Kind is the base preserve_*_access_index() call. Attempts to do /// transformation to a chain of relocable GEPs. bool BPFAbstractMemberAccess::transformGEPChain(Module &M, CallInst *Call, - uint32_t Kind) { + CallInfo &CInfo) { std::string AccessKey; MDNode *TypeMeta; Value *Base = - computeBaseAndAccessKey(Call, AccessKey, Kind, TypeMeta); + computeBaseAndAccessKey(Call, CInfo, AccessKey, TypeMeta); if (!Base) return false; Index: llvm/trunk/test/CodeGen/BPF/CORE/offset-reloc-middle-chain.ll =================================================================== --- llvm/trunk/test/CodeGen/BPF/CORE/offset-reloc-middle-chain.ll +++ llvm/trunk/test/CodeGen/BPF/CORE/offset-reloc-middle-chain.ll @@ -0,0 +1,127 @@ +; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s +; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s +; Source code: +; struct t1 { +; int c; +; }; +; struct s1 { +; struct t1 b; +; }; +; struct r1 { +; struct s1 a; +; }; +; #define _(x) __builtin_preserve_access_index(x) +; void test1(void *p1, void *p2, void *p3); +; void test(struct r1 *arg) { +; struct s1 *ps = _(&arg->a); +; struct t1 *pt = _(&arg->a.b); +; int *pi = _(&arg->a.b.c); +; test1(ps, pt, pi); +; } +; Compilation flag: +; clang -target bpf -O2 -g -S -emit-llvm test.c + +%struct.r1 = type { %struct.s1 } +%struct.s1 = type { %struct.t1 } +%struct.t1 = type { i32 } + +; Function Attrs: nounwind +define dso_local void @test(%struct.r1* %arg) local_unnamed_addr #0 !dbg !7 { +entry: + call void @llvm.dbg.value(metadata %struct.r1* %arg, metadata !22, metadata !DIExpression()), !dbg !29 + %0 = tail call %struct.s1* @llvm.preserve.struct.access.index.p0s_struct.s1s.p0s_struct.r1s(%struct.r1* %arg, i32 0, i32 0), !dbg !30, !llvm.preserve.access.index !11 + call void @llvm.dbg.value(metadata %struct.s1* %0, metadata !23, metadata !DIExpression()), !dbg !29 + %1 = tail call %struct.t1* @llvm.preserve.struct.access.index.p0s_struct.t1s.p0s_struct.s1s(%struct.s1* %0, i32 0, i32 0), !dbg !31, !llvm.preserve.access.index !14 + call void @llvm.dbg.value(metadata %struct.t1* %1, metadata !25, metadata !DIExpression()), !dbg !29 + %2 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.t1s(%struct.t1* %1, i32 0, i32 0), !dbg !32, !llvm.preserve.access.index !17 + call void @llvm.dbg.value(metadata i32* %2, metadata !27, metadata !DIExpression()), !dbg !29 + %3 = bitcast %struct.s1* %0 to i8*, !dbg !33 + %4 = bitcast %struct.t1* %1 to i8*, !dbg !34 + %5 = bitcast i32* %2 to i8*, !dbg !35 + tail call void @test1(i8* %3, i8* %4, i8* %5) #4, !dbg !36 + ret void, !dbg !37 +} + +; CHECK: .long 1 # BTF_KIND_STRUCT(id = 2) + +; CHECK: .ascii "r1" # string offset=1 +; CHECK: .ascii ".text" # string offset=29 +; CHECK: .ascii "0:0" # string offset=72 +; CHECK: .ascii "0:0:0" # string offset=76 +; CHECK: .ascii "0:0:0:0" # string offset=82 + +; CHECK: .long 12 # OffsetReloc +; CHECK-NEXT: .long 29 # Offset reloc section string offset=29 +; CHECK-NEXT: .long 3 +; CHECK_NEXT: .long .Ltmp{{[0-9]+}} +; CHECK_NEXT: .long 2 +; CHECK_NEXT: .long 72 +; CHECK_NEXT: .long .Ltmp{{[0-9]+}} +; CHECK_NEXT: .long 2 +; CHECK_NEXT: .long 76 +; CHECK_NEXT: .long .Ltmp{{[0-9]+}} +; CHECK_NEXT: .long 2 +; CHECK_NEXT: .long 82 + +; Function Attrs: nounwind readnone +declare %struct.s1* @llvm.preserve.struct.access.index.p0s_struct.s1s.p0s_struct.r1s(%struct.r1*, i32, i32) #1 + +; Function Attrs: nounwind readnone +declare %struct.t1* @llvm.preserve.struct.access.index.p0s_struct.t1s.p0s_struct.s1s(%struct.s1*, i32, i32) #1 + +; Function Attrs: nounwind readnone +declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.t1s(%struct.t1*, i32, i32) #1 + +declare dso_local void @test1(i8*, i8*, i8*) local_unnamed_addr #2 + +; Function Attrs: nounwind readnone speculatable willreturn +declare void @llvm.dbg.value(metadata, metadata, metadata) #3 + +attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { nounwind readnone } +attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #3 = { nounwind readnone speculatable willreturn } +attributes #4 = { nounwind } + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4, !5} +!llvm.ident = !{!6} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 42b3328a2368b38fba6bdb0c616fe6c5520e3bc5)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) +!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{i32 1, !"wchar_size", i32 4} +!6 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 42b3328a2368b38fba6bdb0c616fe6c5520e3bc5)"} +!7 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 12, type: !8, scopeLine: 12, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !21) +!8 = !DISubroutineType(types: !9) +!9 = !{null, !10} +!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64) +!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "r1", file: !1, line: 7, size: 32, elements: !12) +!12 = !{!13} +!13 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !11, file: !1, line: 8, baseType: !14, size: 32) +!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 4, size: 32, elements: !15) +!15 = !{!16} +!16 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !14, file: !1, line: 5, baseType: !17, size: 32) +!17 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t1", file: !1, line: 1, size: 32, elements: !18) +!18 = !{!19} +!19 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !17, file: !1, line: 2, baseType: !20, size: 32) +!20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) +!21 = !{!22, !23, !25, !27} +!22 = !DILocalVariable(name: "arg", arg: 1, scope: !7, file: !1, line: 12, type: !10) +!23 = !DILocalVariable(name: "ps", scope: !7, file: !1, line: 13, type: !24) +!24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64) +!25 = !DILocalVariable(name: "pt", scope: !7, file: !1, line: 14, type: !26) +!26 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 64) +!27 = !DILocalVariable(name: "pi", scope: !7, file: !1, line: 15, type: !28) +!28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64) +!29 = !DILocation(line: 0, scope: !7) +!30 = !DILocation(line: 13, column: 19, scope: !7) +!31 = !DILocation(line: 14, column: 19, scope: !7) +!32 = !DILocation(line: 15, column: 13, scope: !7) +!33 = !DILocation(line: 16, column: 9, scope: !7) +!34 = !DILocation(line: 16, column: 13, scope: !7) +!35 = !DILocation(line: 16, column: 17, scope: !7) +!36 = !DILocation(line: 16, column: 3, scope: !7) +!37 = !DILocation(line: 17, column: 1, scope: !7)