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|
/* LLVM binding
Copyright (C) 2014 Tristan Gingold
GHDL is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GHDL; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
// Style:
// C bindings for types, instructions
// C++ API for debug
//
// Later move to C++ only.
#include "llvm-c/Target.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Config/llvm-config.h"
#include "llvm-c/TargetMachine.h"
#include "llvm-c/Core.h"
#include "llvm-c/BitWriter.h"
#include "llvm-c/Analysis.h"
#include "llvm-c/Transforms/Scalar.h"
#if LLVM_VERSION_MAJOR >= 7
// Not present in llvm-6, present in llvm-7
#include "llvm-c/Transforms/Utils.h"
#endif
#if LLVM_VERSION_MAJOR >= 6
#define USE_DEBUG
#endif
#ifdef USE_DEBUG
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/Support/FileSystem.h"
#include <vector>
#endif
#if LLVM_VERSION_MAJOR >= 4
#define USE_ATTRIBUTES
#endif
using namespace llvm;
// True if the LLVM output must be displayed (set by '--dump-llvm')
static bool FlagDumpLLVM = false;
// Verify generated LLVM code.
static bool FlagVerifyLLVM = false;
static bool FlagDebugLines = true;
static bool FlagDebug = false;
static LLVMModuleRef TheModule;
static LLVMTargetRef TheTarget;
static LLVMTargetMachineRef TheTargetMachine;
static LLVMTargetDataRef TheTargetData;
static LLVMRelocMode TheReloc = LLVMRelocDefault;
static LLVMCodeGenOptLevel Optimization = LLVMCodeGenLevelDefault;
static LLVMBuilderRef Builder;
static LLVMBuilderRef DeclBuilder;
static LLVMBuilderRef ExtraBuilder;
static LLVMValueRef StackSaveFun;
static LLVMValueRef StackRestoreFun;
static LLVMValueRef CopySignFun;
static LLVMValueRef Fp0_5;
#ifdef USE_ATTRIBUTES
static LLVMAttributeRef NounwindAttr;
static LLVMAttributeRef UwtableAttr;
#endif
static bool Unreach;
#ifdef USE_DEBUG
static unsigned DebugCurrentLine;
static std::string *DebugCurrentFilename;
static std::string *DebugCurrentDirectory;
static DIFile *DebugCurrentFile;
static DICompileUnit *DebugCurrentCU;
// Current subprogram. Used by types, parameters and static consts.
static DISubprogram *DebugCurrentSubprg;
// Current scope. Used by automatic variables and line locations.
static DIScope *DebugCurrentScope;
static DIBuilder *DBuilder;
#endif
extern "C" void
set_optimization_level (unsigned level)
{
switch(level) {
case 0:
Optimization = LLVMCodeGenLevelNone;
break;
case 1:
Optimization = LLVMCodeGenLevelLess;
break;
case 2:
Optimization = LLVMCodeGenLevelDefault;
break;
default:
Optimization = LLVMCodeGenLevelAggressive;
break;
}
}
extern "C" void
set_debug_level (unsigned level)
{
switch(level) {
case 0:
FlagDebug = false;
FlagDebugLines = false;
break;
case 1:
FlagDebug = false;
FlagDebugLines = true;
break;
default:
FlagDebug = true;
FlagDebugLines = true;
break;
}
}
extern "C" void
set_dump_llvm (unsigned Flag)
{
FlagDumpLLVM = Flag != 0;
}
extern "C" void
set_verify_llvm (unsigned Flag)
{
FlagVerifyLLVM = Flag != 0;
}
extern "C" void
set_pic_flag (unsigned Flag)
{
TheReloc = Flag ? LLVMRelocPIC : LLVMRelocStatic;
}
static void
generateError(const char *Filename, char *Msg)
{
fprintf(stderr, "error while writing to %s\n", Filename);
if (Msg) {
fprintf(stderr, "message: %s\n", Msg);
LLVMDisposeMessage(Msg);
}
exit(2);
}
static void
generateCommon()
{
char *Msg;
#ifdef USE_DEBUG
if (FlagDebugLines) {
DBuilder->finalize();
}
#endif
if (FlagDumpLLVM)
LLVMDumpModule(TheModule);
if (FlagVerifyLLVM) {
if (LLVMVerifyModule(TheModule, LLVMPrintMessageAction, &Msg)) {
LLVMDisposeMessage (Msg);
abort();
}
}
if (Optimization > LLVMCodeGenLevelNone) {
LLVMPassManagerRef PassManager;
PassManager = LLVMCreateFunctionPassManagerForModule (TheModule);
LLVMAddCFGSimplificationPass (PassManager);
LLVMAddPromoteMemoryToRegisterPass (PassManager);
for (LLVMValueRef Func = LLVMGetFirstFunction (TheModule);
Func != nullptr;
Func = LLVMGetNextFunction(Func)) {
LLVMRunFunctionPassManager (PassManager, Func);
}
}
}
extern "C" void
generate_object(char *Filename)
{
char *Msg;
generateCommon();
if (LLVMTargetMachineEmitToFile (TheTargetMachine, TheModule, Filename,
LLVMObjectFile, &Msg))
generateError(Filename, Msg);
}
extern "C" void
generate_assembly(char *Filename)
{
char *Msg;
generateCommon();
if (LLVMTargetMachineEmitToFile (TheTargetMachine, TheModule, Filename,
LLVMAssemblyFile, &Msg))
generateError(Filename, Msg);
}
extern "C" void
generate_bitcode(const char *Filename)
{
generateCommon();
if (LLVMWriteBitcodeToFile(TheModule, Filename)) {
generateError(Filename, nullptr);
}
}
extern "C" void
generate_llvm(char *Filename)
{
char *Msg;
generateCommon();
if (LLVMPrintModuleToFile(TheModule, Filename, &Msg)) {
generateError(Filename, Msg);
}
}
extern "C" void
ortho_llvm_init(const char *Filename, unsigned FilenameLength)
{
char *Msg;
LLVMInitializeNativeTarget();
LLVMInitializeNativeAsmPrinter();
TheModule = LLVMModuleCreateWithName ("ortho");
// Get target triple (from how llvm was configured).
char *Triple = LLVMGetDefaultTargetTriple();
#if LLVM_VERSION_MAJOR >= 7
{
char *RawTriple = Triple;
Triple = LLVMNormalizeTargetTriple(Triple);
LLVMDisposeMessage(RawTriple);
}
#endif
LLVMSetTarget(TheModule, Triple);
// Get target - this is a struct that corresponds to the triple.
if (LLVMGetTargetFromTriple(Triple, &TheTarget, &Msg) != 0) {
fprintf(stderr, "llvm: cannot find target %s: %s\n", Triple, Msg);
LLVMDisposeMessage(Msg);
exit (1);
}
// Create a target machine
TheTargetMachine = LLVMCreateTargetMachine
(TheTarget, Triple, "", "", Optimization, TheReloc,
LLVMCodeModelDefault);
#if LLVM_VERSION_MAJOR < 4
TheTargetData = LLVMGetTargetMachineData (TheTargetMachine);
LLVMSetDataLayout (TheModule, LLVMCopyStringRepOfTargetData (TheTargetData));
#else
TheTargetData = LLVMCreateTargetDataLayout(TheTargetMachine);
LLVMSetModuleDataLayout(TheModule, TheTargetData);
#endif
Builder = LLVMCreateBuilder();
DeclBuilder = LLVMCreateBuilder();
ExtraBuilder = LLVMCreateBuilder();
LLVMTypeRef I8Ptr = LLVMPointerType(LLVMInt8Type(), 0);
StackSaveFun = LLVMAddFunction
(TheModule, "llvm.stacksave", LLVMFunctionType (I8Ptr, NULL, 0, false));
LLVMTypeRef ParamTypes[2];
ParamTypes[0] = I8Ptr;
StackRestoreFun = LLVMAddFunction
(TheModule, "llvm.stackrestore",
LLVMFunctionType(LLVMVoidType(), ParamTypes, 1, false));
ParamTypes[0] = LLVMDoubleType();
ParamTypes[1] = LLVMDoubleType();
CopySignFun = LLVMAddFunction
(TheModule, "llvm.copysign.f64",
LLVMFunctionType(LLVMDoubleType(), ParamTypes, 2, false));
Fp0_5 = LLVMConstReal(LLVMDoubleType(), 0.5);
#ifdef USE_ATTRIBUTES
unsigned AttrId;
AttrId = LLVMGetEnumAttributeKindForName("nounwind", 8);
assert (AttrId != 0);
NounwindAttr = LLVMCreateEnumAttribute(LLVMGetGlobalContext(), AttrId, 0);
AttrId = LLVMGetEnumAttributeKindForName("uwtable", 7);
assert (AttrId != 0);
UwtableAttr = LLVMCreateEnumAttribute(LLVMGetGlobalContext(), AttrId, 0);
#endif
#ifdef USE_DEBUG
if (FlagDebugLines) {
DBuilder = new DIBuilder(*unwrap(TheModule));
DebugCurrentFilename = new std::string(Filename, FilenameLength);
SmallString<128> CurrentDir;
llvm::sys::fs::current_path(CurrentDir);
DebugCurrentDirectory = new std::string(CurrentDir.data(),
CurrentDir.size());
DebugCurrentFile = DBuilder->createFile(StringRef(*DebugCurrentFilename),
StringRef(*DebugCurrentDirectory));
DebugCurrentCU = DBuilder->createCompileUnit
(llvm::dwarf::DW_LANG_C, DebugCurrentFile, StringRef("ortho-llvm"),
Optimization > LLVMCodeGenLevelNone, StringRef(), 0);
DebugCurrentScope = DebugCurrentCU;
}
#endif
}
// Set debug location on instruction RES
static void
setDebugLocation(LLVMValueRef Res)
{
#ifdef USE_DEBUG
if (FlagDebugLines) {
unwrap(Builder)->SetInstDebugLocation(static_cast<Instruction*>(unwrap(Res)));
}
#endif
}
enum OTKind : unsigned char {
OTKUnsigned, OTKSigned, OTKFloat,
OTKEnum, OTKBool,
OTKAccess, OTKIncompleteAccess,
OTKRecord, OTKIncompleteRecord,
OTKUnion,
OTKArray
};
struct OTnodeBase {
LLVMTypeRef Ref;
#ifdef USE_DEBUG
DIType *Dbg;
#endif
OTKind Kind;
bool Bounded;
OTnodeBase (LLVMTypeRef R, OTKind K, bool Bounded) :
Ref(R),
#ifdef USE_DEBUG
Dbg(nullptr),
#endif
Kind(K), Bounded(Bounded) {}
unsigned getAlignment() const {
return LLVMABIAlignmentOfType(TheTargetData, Ref);
}
unsigned long long getSize() const {
return LLVMABISizeOfType(TheTargetData, Ref);
}
unsigned long long getBitSize() const {
return 8 * getSize();
}
};
typedef OTnodeBase *OTnode;
struct OTnodeScal : OTnodeBase {
// For scalar: the size in bits
unsigned ScalSize;
OTnodeScal (LLVMTypeRef R, OTKind K, unsigned Sz) :
OTnodeBase(R, K, true), ScalSize(Sz) {}
};
struct OTnodeUnsigned : OTnodeScal {
OTnodeUnsigned (LLVMTypeRef R, unsigned Sz) :
OTnodeScal(R, OTKUnsigned, Sz) {}
};
struct OTnodeSigned : OTnodeScal {
OTnodeSigned (LLVMTypeRef R, unsigned Sz) :
OTnodeScal(R, OTKSigned, Sz) {}
};
struct OTnodeFloat : OTnodeScal {
OTnodeFloat (LLVMTypeRef R, unsigned Sz) :
OTnodeScal(R, OTKFloat, Sz) {}
};
static LLVMTypeRef
SizeToLLVM (unsigned Sz)
{
switch (Sz) {
case 8:
return LLVMInt8Type();
case 32:
return LLVMInt32Type();
case 64:
return LLVMInt64Type();
default:
abort();
}
}
extern "C" OTnode
new_unsigned_type(unsigned Sz)
{
return new OTnodeUnsigned(SizeToLLVM(Sz), Sz);
}
extern "C" OTnode
new_signed_type(unsigned Sz)
{
return new OTnodeSigned(SizeToLLVM(Sz), Sz);
}
extern "C" OTnode
new_float_type()
{
return new OTnodeFloat(LLVMDoubleType(), 64);
}
struct OTnodeEnumBase : OTnodeScal {
#ifdef USE_DEBUG
DINodeArray *DbgEls;
#endif
OTnodeEnumBase (LLVMTypeRef R, OTKind K, unsigned Sz) :
OTnodeScal(R, K, Sz) {}
};
struct OTnodeEnum : OTnodeEnumBase {
OTnodeEnum (LLVMTypeRef R, unsigned Sz) :
OTnodeEnumBase(R, OTKEnum, Sz) {}
};
struct OEnumList {
LLVMTypeRef Ref;
unsigned Pos;
OTnodeEnum *Etype;
#ifdef USE_DEBUG
SmallVector<Metadata *, 8> *Dbg;
#endif
};
extern "C" void
start_enum_type (OEnumList *List, unsigned Sz)
{
LLVMTypeRef T = SizeToLLVM(Sz);
*List = {T, 0, new OTnodeEnum(T, Sz)
#ifdef USE_DEBUG
, nullptr
#endif
};
#ifdef USE_DEBUG
if (FlagDebug)
List->Dbg = new SmallVector<Metadata *, 8>();
#endif
}
struct OCnode {
LLVMValueRef Ref;
OTnode Ctype;
};
struct OIdent {
const char *cstr;
};
extern "C" void
new_enum_literal (OEnumList *List, OIdent Ident, OCnode *Res)
{
*Res = {LLVMConstInt(List->Ref, List->Pos, 0), List->Etype};
#ifdef USE_DEBUG
if (FlagDebug) {
DIEnumerator *D;
// Note: IsUnsigned argument is not available in LLVM 6.0
D = DBuilder->createEnumerator (StringRef(Ident.cstr), List->Pos);
List->Dbg->push_back(D);
}
#endif
List->Pos++;
}
extern "C" void
finish_enum_type (OEnumList *List, OTnodeEnum **Res)
{
*Res = List->Etype;
#ifdef USE_DEBUG
if (FlagDebug) {
List->Etype->DbgEls =
new DINodeArray(DBuilder->getOrCreateArray(*List->Dbg));
delete List->Dbg;
}
#endif
}
struct OTnodeBool : OTnodeEnumBase {
OTnodeBool (LLVMTypeRef R) : OTnodeEnumBase(R, OTKBool, 1) {}
};
extern "C" void
new_boolean_type(OTnode *Res,
OIdent FalseId, OCnode *False_E,
OIdent TrueId, OCnode *True_E)
{
OTnodeBool *T = new OTnodeBool(LLVMInt1Type());
*Res = T;
*False_E = {LLVMConstInt(T->Ref, 0, 0), T};
*True_E = {LLVMConstInt(T->Ref, 1, 0), T};
#ifdef USE_DEBUG
if (FlagDebug) {
SmallVector<Metadata *, 2> DbgEls;
DbgEls.push_back(DBuilder->createEnumerator (StringRef(FalseId.cstr), 0));
DbgEls.push_back(DBuilder->createEnumerator (StringRef(TrueId.cstr), 1));
T->DbgEls = new DINodeArray(DBuilder->getOrCreateArray(DbgEls));
}
#endif
}
extern "C" OCnode
new_signed_literal (OTnode LType, int64_t Value)
{
return {LLVMConstInt(LType->Ref, Value, 1), LType};
}
extern "C" OCnode
new_unsigned_literal (OTnode LType, uint64_t Value)
{
return {LLVMConstInt(LType->Ref, Value, 0), LType};
}
extern "C" OCnode
new_float_literal (OTnode LType, double Value)
{
return {LLVMConstReal(LType->Ref, Value), LType};
}
struct OTnodeAccBase : OTnodeBase {
// For accesses
OTnode Acc;
OTnodeAccBase (LLVMTypeRef R, OTKind Kind, OTnode Acc) :
OTnodeBase(R, Kind, true), Acc(Acc) {}
};
struct OTnodeAcc : OTnodeAccBase {
OTnodeAcc (LLVMTypeRef R, OTnode Acc) :
OTnodeAccBase(R, OTKAccess, Acc) {}
};
struct OTnodeIncompleteAcc : OTnodeAccBase {
OTnodeIncompleteAcc () :
OTnodeAccBase(nullptr, OTKIncompleteAccess, nullptr) {}
};
extern "C" OTnode
new_access_type(OTnode DType)
{
if (DType == nullptr) {
return new OTnodeIncompleteAcc();
} else {
return new OTnodeAcc(LLVMPointerType(DType->Ref, 0), DType);
}
}
extern "C" void
finish_access_type(OTnodeAcc *AccType, OTnode DType)
{
// Must be incomplete.
assert (AccType->Acc == nullptr);
LLVMTypeRef Types[1] = { DType->Ref };
LLVMStructSetBody(LLVMGetElementType(AccType->Ref), Types, 1, 0);
AccType->Acc = DType;
#ifdef USE_DEBUG
if (FlagDebug) {
// The '3' is a little bit magic, but correspond to the base type as
// defined (e.g.) in DebugInfoMetadata.h for DIDerivedType::getBaseType()
AccType->Dbg->replaceOperandWith(3, DType->Dbg);
}
#endif
}
extern "C" OCnode
new_null_access (OTnode LType)
{
return {LLVMConstNull(LType->Ref), LType};
}
enum OFKind { OF_Record, OF_Union};
struct OFnodeBase {
OFKind Kind;
OTnode FType;
OIdent Ident;
OFnodeBase(OFKind Kind, OTnode FType, OIdent Ident) :
Kind(Kind), FType(FType), Ident(Ident) {}
};
struct OElementList {
OFKind Kind;
// Number of fields.
unsigned Count;
// For record: the access to the incomplete (but named) type.
OTnode RecType;
// For unions: biggest for size and alignment
unsigned Size;
unsigned Align;
// For unions: type with the biggest alignment.
LLVMTypeRef AlignType;
std::vector<OFnodeBase *> *Els;
};
extern "C" void
start_record_type (OElementList *Elements)
{
*Elements = {OF_Record,
0,
nullptr,
0, 0, nullptr,
new std::vector<OFnodeBase *>()};
}
struct OFnodeRec : OFnodeBase {
unsigned Index;
OFnodeRec(OTnode Etype, OIdent Ident, unsigned Index) :
OFnodeBase(OF_Record, Etype, Ident), Index(Index) {}
};
struct OFnodeUnion : OFnodeBase {
LLVMTypeRef Utype;
// Pointer type - used to do conversion between the union and the field.
LLVMTypeRef PtrType;
OFnodeUnion(OTnode Etype, OIdent Ident, LLVMTypeRef PtrType) :
OFnodeBase(OF_Union, Etype, Ident), Utype(Etype->Ref), PtrType(PtrType) {}
};
extern "C" void
new_record_field(OElementList *Elements,
OFnodeRec **El, OIdent Ident, OTnode Etype)
{
*El = new OFnodeRec(Etype, Ident, Elements->Count);
Elements->Els->push_back(*El);
Elements->Count++;
}
struct OTnodeRecBase : OTnodeBase {
std::vector<OFnodeBase *> Els;
OTnodeRecBase (LLVMTypeRef R, OTKind Kind, bool Bounded) :
OTnodeBase(R, Kind, Bounded) {}
};
struct OTnodeRec : OTnodeRecBase {
OTnodeRec (LLVMTypeRef R, bool Bounded) :
OTnodeRecBase(R, OTKRecord, Bounded) {}
};
struct OTnodeIncompleteRec : OTnodeRecBase {
OTnodeIncompleteRec () :
OTnodeRecBase(nullptr, OTKIncompleteRecord, false) {}
};
#ifdef USE_DEBUG
static DINodeArray
buildDebugRecordElements(OTnodeRecBase *Atype)
{
unsigned Count = Atype->Els.size();
std::vector<Metadata *> els(Count);
unsigned i = 0;
for (OFnodeBase *e : Atype->Els) {
unsigned bitoff = 8 * LLVMOffsetOfElement(TheTargetData, Atype->Ref, i);
els[i++] = DBuilder->createMemberType
(DebugCurrentSubprg, StringRef(e->Ident.cstr), NULL, 0,
e->FType->getBitSize(), /* align */ 0,
bitoff, DINode::DIFlags::FlagZero, e->FType->Dbg);
}
return DBuilder->getOrCreateArray(els);
}
#endif
extern "C" void
finish_record_type(OElementList *Els, OTnode *Res)
{
LLVMTypeRef *Types = new LLVMTypeRef[Els->Count];
// Create types array for elements.
int i = 0;
bool Bounded = true;
for (OFnodeBase *Field : *Els->Els) {
Bounded &= Field->FType->Bounded;
Types[i++] = Field->FType->Ref;
}
OTnodeRecBase *T;
if (Els->RecType != nullptr) {
// Completion
LLVMStructSetBody (Els->RecType->Ref, Types, Els->Count, 0);
Els->RecType->Bounded = Bounded;
T = static_cast<OTnodeRecBase *>(Els->RecType);
T->Els = std::move(*Els->Els);
#ifdef USE_DEBUG
if (FlagDebug) {
DICompositeType *Dbg;
Dbg = DBuilder->createStructType
(DebugCurrentSubprg, T->Dbg->getName(), DebugCurrentFile,
DebugCurrentLine, T->getBitSize(), /* Align */ 0,
DINode::DIFlags::FlagZero, nullptr,
buildDebugRecordElements(T));
llvm::TempMDNode fwd_decl(T->Dbg);
T->Dbg = DBuilder->replaceTemporary(std::move(fwd_decl), Dbg);
}
#endif
} else {
// Non-completion.
// Debug info are created when the type is declared.
T = new OTnodeRec(LLVMStructType(Types, Els->Count, 0), Bounded);
T->Els = std::move(*Els->Els);
}
*Res = T;
}
struct OElementSublist {
// Number of fields.
unsigned Count;
std::vector<OFnodeBase *> *Base_Els;
std::vector<OFnodeBase *> *Els;
};
extern "C" void
start_record_subtype (OTnodeRec *Rtype, OElementSublist *Elements)
{
*Elements = {0,
&Rtype->Els,
new std::vector<OFnodeBase *>()};
}
extern "C" void
new_subrecord_field(OElementSublist *Elements,
OFnodeRec **El, OTnode Etype)
{
OFnodeBase *Bel = (*Elements->Base_Els)[Elements->Count];
*El = new OFnodeRec(Etype, Bel->Ident, Elements->Count);
Elements->Els->push_back(*El);
Elements->Count++;
}
extern "C" void
finish_record_subtype(OElementSublist *Els, OTnode *Res)
{
LLVMTypeRef *Types = new LLVMTypeRef[Els->Count];
// Create types array for elements.
int i = 0;
for (OFnodeBase *Field : *Els->Els) {
Types[i++] = Field->FType->Ref;
}
OTnodeRecBase *T;
T = new OTnodeRec(LLVMStructType(Types, Els->Count, 0), true);
T->Els = std::move(*Els->Els);
*Res = T;
}
extern "C" void
new_uncomplete_record_type(OTnode *Res)
{
*Res = new OTnodeIncompleteRec();
}
extern "C" void
start_uncomplete_record_type(OTnodeRec *Res, OElementList *Els)
{
// Must be incomplete.
assert (Res->Kind == OTKIncompleteRecord);
*Els = {OF_Record,
0,
Res,
0, 0, nullptr,
new std::vector<OFnodeBase *>()};
}
extern "C" void
start_union_type(OElementList *Els)
{
*Els = {OF_Union,
0,
nullptr,
0, 0, nullptr,
new std::vector<OFnodeBase *>()};
}
extern "C" void
new_union_field(OElementList *Els, OFnodeUnion **El,
OIdent Ident, OTnode Etype)
{
unsigned Size = Etype->getSize();
unsigned Align = Etype->getAlignment();
*El = new OFnodeUnion(Etype, Ident, LLVMPointerType(Etype->Ref, 0));
if (Size > Els->Size)
Els->Size = Size;
if (Els->AlignType == nullptr || Align > Els->Align) {
Els->Align = Align;
Els->AlignType = Etype->Ref;
}
Els->Els->push_back(*El);
}
struct OTnodeUnion : OTnodeBase {
// For unions
std::vector<OFnodeBase *> Els;
unsigned Size;
LLVMTypeRef MainField;
OTnodeUnion(LLVMTypeRef R, unsigned Sz, LLVMTypeRef Main) :
OTnodeBase(R, OTKUnion, true), Size(Sz), MainField(Main) {}
};
extern "C" void
finish_union_type(OElementList *Els, OTnode *Res)
{
unsigned Count;
LLVMTypeRef Types[2];
if (Els->AlignType == nullptr) {
// An empty union
Count = 0;
} else {
unsigned Pad;
Types[0] = Els->AlignType;
Pad = Els->Size - LLVMABISizeOfType(TheTargetData, Els->AlignType);
if (Pad != 0) {
Types[1] = LLVMArrayType(LLVMInt8Type(), Pad);
Count = 2;
} else {
Count = 1;
}
}
OTnodeUnion *T;
T = new OTnodeUnion(LLVMStructType(Types, Count, 0),
Els->Size, Els->AlignType);
T->Els = std::move(*Els->Els);
*Res = T;
delete Els->Els;
}
struct OTnodeArr : OTnodeBase {
// For arrays: type of the element
OTnode ElType;
OTnodeArr(LLVMTypeRef R, bool Bounded, OTnode E) :
OTnodeBase(R, OTKArray, Bounded), ElType(E) {}
};
#ifdef USE_DEBUG
static void
addArrayDebug(OTnodeArr *Atype, unsigned Len)
{
DISubrange *Rng;
Rng = DBuilder->getOrCreateSubrange(0, Len);
SmallVector<Metadata *, 1> Subscripts;
Subscripts.push_back(Rng);
OTnode ElType = static_cast<OTnodeArr *>(Atype)->ElType;
Atype->Dbg = DBuilder->createArrayType
(Atype->getSize(), Atype->getAlignment(),
ElType->Dbg, DBuilder->getOrCreateArray(Subscripts));
}
#endif
extern "C" OTnode
new_array_type(OTnode ElType, OTnode IndexType)
{
OTnodeArr *Res;
unsigned Len = 0;
Res = new OTnodeArr(LLVMArrayType(ElType->Ref, Len), false, ElType);
#ifdef USE_DEBUG
if (FlagDebug)
addArrayDebug(Res, Len);
#endif
return Res;
}
extern "C" OTnode
new_array_subtype(OTnodeArr *ArrType, OTnode ElType, OCnode *Length)
{
OTnodeArr *Res;
unsigned Len = LLVMConstIntGetZExtValue(Length->Ref);
Res = new OTnodeArr(LLVMArrayType(ElType->Ref, Len),
ElType->Bounded,
ElType);
#ifdef USE_DEBUG
if (FlagDebug)
addArrayDebug(Res, Len);
#endif
return Res;
}
extern "C" void
new_type_decl(OIdent Ident, OTnode Atype)
{
switch(Atype->Kind) {
case OTKIncompleteAccess:
Atype->Ref = LLVMPointerType
(LLVMStructCreateNamed(LLVMGetGlobalContext(), Ident.cstr), 0);
break;
case OTKIncompleteRecord:
Atype->Ref = LLVMStructCreateNamed(LLVMGetGlobalContext(), Ident.cstr);
break;
default:
break;
}
#ifdef USE_DEBUG
// Add dwarf type.
if (FlagDebug) {
switch(Atype->Kind) {
case OTKUnsigned:
Atype->Dbg = DBuilder->createBasicType
(StringRef(Ident.cstr), static_cast<OTnodeScal*>(Atype)->ScalSize,
dwarf::DW_ATE_unsigned);
break;
case OTKSigned:
Atype->Dbg = DBuilder->createBasicType
(StringRef(Ident.cstr), static_cast<OTnodeScal*>(Atype)->ScalSize,
dwarf::DW_ATE_signed);
break;
case OTKFloat:
Atype->Dbg = DBuilder->createBasicType
(StringRef(Ident.cstr), static_cast<OTnodeScal*>(Atype)->ScalSize,
dwarf::DW_ATE_float);
break;
case OTKEnum:
case OTKBool:
Atype->Dbg = DBuilder->createEnumerationType
(DebugCurrentSubprg, StringRef(Ident.cstr), DebugCurrentFile,
DebugCurrentLine, static_cast<OTnodeEnumBase*>(Atype)->ScalSize,
Atype->getAlignment(),
*static_cast<OTnodeEnumBase*>(Atype)->DbgEls, nullptr);
delete static_cast<OTnodeEnumBase*>(Atype)->DbgEls;
break;
case OTKIncompleteAccess:
if (static_cast<OTnodeAccBase*>(Atype)->Acc == nullptr) {
// Still incomplete
Atype->Dbg = DBuilder->createPointerType
(nullptr, Atype->getBitSize(), 0, None, StringRef(Ident.cstr));
break;
}
// Fallthrough
case OTKAccess:
Atype->Dbg = DBuilder->createPointerType
(static_cast<OTnodeAcc*>(Atype)->Acc->Dbg,
Atype->getBitSize(), 0, None, StringRef(Ident.cstr));
break;
case OTKArray:
// The debug info has already been created for arrays, as they can be
// anonymous
Atype->Dbg = DBuilder->createTypedef
(Atype->Dbg, StringRef(Ident.cstr), DebugCurrentFile,
DebugCurrentLine, DebugCurrentSubprg);
break;
case OTKRecord:
Atype->Dbg = DBuilder->createStructType
(DebugCurrentSubprg, StringRef(Ident.cstr), DebugCurrentFile,
DebugCurrentLine, Atype->getBitSize(), /* align */ 0,
DINode::DIFlags::FlagPublic, nullptr,
buildDebugRecordElements(static_cast<OTnodeRecBase *>(Atype)));
break;
case OTKUnion:
{
unsigned Count = static_cast<OTnodeUnion *>(Atype)->Els.size();
std::vector<Metadata *> els(Count);
unsigned i = 0;
for (OFnodeBase *e : static_cast<OTnodeUnion *>(Atype)->Els) {
els[i++] = DBuilder->createMemberType
(DebugCurrentSubprg, StringRef(e->Ident.cstr), DebugCurrentFile,
DebugCurrentLine, e->FType->getBitSize(),
e->FType->getAlignment(), 0, DINode::DIFlags::FlagPublic,
e->FType->Dbg);
}
Atype->Dbg = DBuilder->createUnionType
(DebugCurrentSubprg, StringRef(Ident.cstr), DebugCurrentFile,
DebugCurrentLine, Atype->getBitSize(), Atype->getAlignment(),
DINode::DIFlags::FlagPublic, DBuilder->getOrCreateArray(els));
}
break;
case OTKIncompleteRecord:
Atype->Dbg = DBuilder->createReplaceableCompositeType
(dwarf::DW_TAG_structure_type, StringRef(Ident.cstr),
DebugCurrentSubprg, DebugCurrentFile, DebugCurrentLine);
break;
}
}
#endif
}
struct ORecordAggrList {
unsigned Len;
LLVMValueRef *Els;
OTnode Atype;
};
extern "C" void
start_record_aggr(ORecordAggrList *List, OTnode Atype)
{
unsigned Count = LLVMCountStructElementTypes(Atype->Ref);
*List = {0, new LLVMValueRef[Count], Atype};
}
extern "C" void
new_record_aggr_el(ORecordAggrList *List, OCnode *Val)
{
List->Els[List->Len++] = Val->Ref;
}
extern "C" void
finish_record_aggr(ORecordAggrList *List, OCnode *Res)
{
*Res = {LLVMConstStruct(List->Els, List->Len, 0), List->Atype};
delete List->Els;
}
struct OArrayAggrList {
unsigned Len;
LLVMValueRef *Els;
LLVMTypeRef ElType;
OTnode Atype;
};
extern "C" void
start_array_aggr(OArrayAggrList *List, OTnodeArr *Atype, unsigned len)
{
*List = {0, new LLVMValueRef[len], Atype->ElType->Ref, Atype};
}
extern "C" void
new_array_aggr_el(OArrayAggrList *List, OCnode *Value)
{
List->Els[List->Len++] = Value->Ref;
}
extern "C" void
finish_array_aggr(OArrayAggrList *List, OCnode *Res)
{
*Res = {LLVMConstArray(List->ElType, List->Els, List->Len), List->Atype};
delete List->Els;
}
extern "C" OCnode
new_union_aggr(OTnodeUnion *Atype, OFnodeUnion *Field, OCnode *Value)
{
unsigned Size = LLVMABISizeOfType(TheTargetData, Field->Utype);
LLVMValueRef Vals[2];
unsigned Count;
Vals[0] = Value->Ref;
if (Size < Atype->Size) {
// Add padding.
Vals[1] = LLVMGetUndef(LLVMArrayType(LLVMInt8Type(), Atype->Size - Size));
Count = 2;
} else {
Count = 1;
}
return {LLVMConstStruct(Vals, Count, false), Atype};
}
extern "C" OCnode
new_default_value(OTnode Ltype)
{
return {LLVMConstNull(Ltype->Ref), Ltype};
}
static OCnode
constToConst(OTnode Rtype, uint64_t Val)
{
LLVMValueRef Ref;
switch (Rtype->Kind) {
case OTKUnsigned:
case OTKSigned:
Ref = LLVMConstInt(Rtype->Ref, Val, 0);
break;
case OTKAccess:
// It is possible to use an access type for offsetof.
Ref = LLVMConstInt(LLVMInt64Type(), Val, 0);
Ref = LLVMConstIntToPtr(Ref, Rtype->Ref);
break;
default:
abort();
}
return {Ref, Rtype};
}
extern "C" OCnode
new_sizeof(OTnode Atype, OTnode Rtype)
{
return constToConst(Rtype, LLVMABISizeOfType(TheTargetData, Atype->Ref));
}
extern "C" OCnode
new_record_sizeof(OTnode Atype, OTnode Rtype)
{
return new_sizeof(Atype, Rtype);
}
extern "C" OCnode
new_alignof(OTnode Atype, OTnode Rtype)
{
return constToConst
(Rtype, LLVMABIAlignmentOfType(TheTargetData, Atype->Ref));
}
extern "C" OCnode
new_offsetof(OTnode Atype, OFnodeRec *Field, OTnode Rtype)
{
return constToConst
(Rtype, LLVMOffsetOfElement(TheTargetData, Atype->Ref, Field->Index));
}
struct OEnode {
LLVMValueRef Ref;
OTnode Etype;
};
extern "C" OEnode
new_lit(OCnode *Lit)
{
return {Lit->Ref, Lit->Ctype};
}
enum ODKind : unsigned char {
ODKConst,
ODKVar,
ODKLocal,
ODKInterface,
ODKType,
ODKSubprg
};
struct ODnodeBase {
LLVMValueRef Ref;
OTnode Dtype;
virtual ODKind getKind() const = 0;
ODnodeBase(LLVMValueRef R, OTnode T) : Ref(R), Dtype(T) {}
virtual ~ODnodeBase() {}
};
typedef ODnodeBase *ODnode;
struct ODnodeVar : ODnodeBase {
ODKind getKind() const override { return ODKVar; }
ODnodeVar(LLVMValueRef R, OTnode T) : ODnodeBase(R, T) {}
};
struct ODnodeLocalVar : ODnodeBase {
ODKind getKind() const override { return ODKLocal; }
ODnodeLocalVar(LLVMValueRef R, OTnode T) : ODnodeBase(R, T) {}
};
enum OStorage {
O_Storage_External,
O_Storage_Public,
O_Storage_Private,
O_Storage_Local
};
extern "C" void
new_var_decl(ODnode *Res, OIdent Ident, OStorage Storage, OTnode Atype)
{
LLVMValueRef Decl;
if (Storage == O_Storage_Local) {
if (Unreach)
Decl = nullptr;
else
Decl = LLVMBuildAlloca (DeclBuilder, Atype->Ref, Ident.cstr);
*Res = new ODnodeLocalVar(Decl, Atype);
#ifdef USE_DEBUG
if (FlagDebug && !Unreach) {
DILocalVariable *D;
D = DBuilder->createAutoVariable
(DebugCurrentScope, StringRef(Ident.cstr), DebugCurrentFile,
DebugCurrentLine, Atype->Dbg, true);
DBuilder->insertDeclare
(unwrap(Decl), D, DBuilder->createExpression(),
DebugLoc::get(DebugCurrentLine, 0, DebugCurrentScope),
unwrap(LLVMGetInsertBlock(DeclBuilder)));
}
#endif
} else {
if (Storage == O_Storage_External) {
Decl = LLVMGetNamedGlobal(TheModule, Ident.cstr);
} else {
Decl = nullptr;
}
if (Decl == nullptr)
Decl = LLVMAddGlobal(TheModule, Atype->Ref, Ident.cstr);
*Res = new ODnodeVar(Decl, Atype);
if (Storage == O_Storage_Private)
LLVMSetLinkage(Decl, LLVMInternalLinkage);
switch(Storage) {
case O_Storage_Public:
case O_Storage_Private:
LLVMSetInitializer(Decl, LLVMConstNull(Atype->Ref));
break;
case O_Storage_External:
case O_Storage_Local:
break;
}
#ifdef USE_DEBUG
if (FlagDebug) {
DIGlobalVariableExpression *GVE;
GVE = DBuilder->createGlobalVariableExpression
(DebugCurrentSubprg, StringRef(Ident.cstr), StringRef(),
DebugCurrentFile, DebugCurrentLine, Atype->Dbg,
Storage == O_Storage_Private);
static_cast<GlobalVariable*>(unwrap(Decl))->addDebugInfo(GVE);
}
#endif
}
}
struct ODnodeConst : ODnodeBase {
OStorage Storage;
OIdent Ident;
ODKind getKind() const override { return ODKConst; }
ODnodeConst(LLVMValueRef R, OTnode T, OStorage S, OIdent I) :
ODnodeBase(R, T), Storage(S), Ident(I) {}
};
static void
setConstAttributes(LLVMValueRef Ref, OStorage Storage)
{
LLVMSetGlobalConstant(Ref, true);
if (Storage == O_Storage_Private)
LLVMSetLinkage(Ref, LLVMInternalLinkage);
}
extern "C" void
new_const_decl(ODnode *Res, OIdent Ident, OStorage Storage, OTnode Atype)
{
LLVMValueRef Decl;
if (Storage == O_Storage_Local)
abort();
if (Storage == O_Storage_External) {
// It is possible to re-declare an external const.
Decl = LLVMGetNamedGlobal(TheModule, Ident.cstr);
if (Decl == nullptr)
Decl = LLVMAddGlobal(TheModule, Atype->Ref, Ident.cstr);
setConstAttributes(Decl, Storage);
} else {
// If the type of the constant is not yet bounded, delay the creation
// of the constant until its initialization.
if (Atype->Bounded) {
Decl = LLVMAddGlobal(TheModule, Atype->Ref, Ident.cstr);
setConstAttributes(Decl, Storage);
} else {
Decl = nullptr;
}
}
*Res = new ODnodeConst(Decl, Atype, Storage, Ident);
}
extern "C" void
start_init_value(ODnodeConst **Decl)
{
}
extern "C" void
finish_init_value(ODnodeConst **Decl, OCnode *Val)
{
ODnodeConst *Cst = *Decl;
LLVMValueRef Ref = Cst->Ref;
if (Ref == nullptr) {
Ref = LLVMAddGlobal(TheModule, LLVMTypeOf(Val->Ref), Cst->Ident.cstr);
setConstAttributes(Ref, Cst->Storage);
Cst->Ref = Ref;
}
LLVMSetInitializer(Ref, Val->Ref);
#ifdef USE_DEBUG
if (FlagDebug && Cst->Dtype->Dbg != nullptr) {
DIGlobalVariableExpression *GVE;
// Note: the scope of a global expression cannot be a lexical scope.
GVE = DBuilder->createGlobalVariableExpression
(DebugCurrentSubprg,
StringRef(Cst->Ident.cstr), StringRef(),
DebugCurrentFile, DebugCurrentLine,
DBuilder->createQualifiedType(dwarf::DW_TAG_const_type, Cst->Dtype->Dbg),
Cst->Storage == O_Storage_Private);
static_cast<GlobalVariable*>(unwrap(Ref))->addDebugInfo(GVE);
}
#endif
}
struct ODnodeInter : ODnodeBase {
OIdent Ident;
ODKind getKind() const override { return ODKInterface; }
ODnodeInter(LLVMValueRef R, OTnode T, OIdent Id) :
ODnodeBase(R, T), Ident(Id) {}
};
struct OInterList {
// Subprogram
OIdent Ident;
OStorage Storage;
OTnode Rtype;
// Number of interfaces.
std::vector<ODnodeInter *> *Inters;
};
extern "C" void
start_function_decl(OInterList *Inters, OIdent Ident, OStorage Storage,
OTnode Rtype)
{
*Inters = { Ident, Storage, Rtype,
new std::vector<ODnodeInter *>() };
}
extern "C" void
start_procedure_decl(OInterList *Inters, OIdent Ident, OStorage Storage)
{
*Inters = { Ident, Storage, nullptr,
new std::vector<ODnodeInter *>() };
}
extern "C" void
new_interface_decl(OInterList *Inters,
ODnode *Res, OIdent Ident, OTnode Itype)
{
ODnodeInter *Decl = new ODnodeInter(nullptr, Itype, Ident);
*Res = Decl;
Inters->Inters->push_back(Decl);
}
struct ODnodeSubprg : ODnodeBase {
// Interfaces
std::vector<ODnodeInter *> Inters;
// Storage
OStorage Storage;
OIdent Ident;
ODKind getKind() const override { return ODKSubprg; }
ODnodeSubprg(LLVMValueRef R, OTnode T, OStorage S, OIdent Id,
std::vector<ODnodeInter *> Inters) :
ODnodeBase(R, T), Inters(Inters), Storage(S), Ident(Id) {}
};
extern "C" void
finish_subprogram_decl(OInterList *Inters, ODnodeSubprg **Res)
{
unsigned ArgsCount = Inters->Inters->size();
LLVMTypeRef *Types = new LLVMTypeRef[ArgsCount];
// Build array of interface types.
int i = 0;
for (ODnodeInter *Inter: *Inters->Inters)
Types[i++] = Inter->Dtype->Ref;
// Return type.
LLVMTypeRef Rtype;
if (Inters->Rtype == nullptr)
Rtype = LLVMVoidType();
else
Rtype = Inters->Rtype->Ref;
LLVMTypeRef Ftype = LLVMFunctionType(Rtype, Types, ArgsCount, 0);
LLVMValueRef Decl;
if (Inters->Storage == O_Storage_External)
Decl = LLVMGetNamedFunction(TheModule, Inters->Ident.cstr);
else
Decl = nullptr;
if (Decl == nullptr) {
Decl = LLVMAddFunction(TheModule, Inters->Ident.cstr, Ftype);
#ifdef USE_ATTRIBUTES
LLVMAddAttributeAtIndex(Decl, LLVMAttributeFunctionIndex, NounwindAttr);
LLVMAddAttributeAtIndex(Decl, LLVMAttributeFunctionIndex, UwtableAttr);
#else
LLVMAddFunctionAttr (Decl, LLVMNoUnwindAttribute);
LLVMAddFunctionAttr (Decl, LLVMUWTable);
#endif
LLVMSetFunctionCallConv(Decl, LLVMCCallConv);
}
// Translate interfaces
i = 0;
for (ODnodeInter *Inter: *Inters->Inters) {
Inter->Ref = LLVMGetParam(Decl, i);
LLVMSetValueName(Inter->Ref, Inter->Ident.cstr);
i++;
}
// Create the result.
ODnodeSubprg *R;
R = new ODnodeSubprg(Decl, Inters->Rtype, Inters->Storage, Inters->Ident,
std::move(*Inters->Inters));
*Res = R;
}
// Data for a declare block.
struct DeclareBlock {
// First basic block of the declare.
LLVMBasicBlockRef StmtBB;
// To handle allocb: stack pointer at the entry of the block, that needs
// to be restored when leaving the block (either by falling through or
// via exit/next). Set only of New_Alloca is used.
LLVMValueRef StackValue;
// Previous value block.
DeclareBlock *Prev;
#ifdef USE_DEBUG
DIScope *DebugPrevScope;
#endif
};
static DeclareBlock *CurrentDeclareBlock;
static DeclareBlock *OldDeclareBlock;
static LLVMValueRef CurrentFunc;
static ODnodeSubprg *CurrentFuncDecl;
static void
CreateDeclareBlock()
{
DeclareBlock *Res;
// Allocate a declare block
if (OldDeclareBlock != nullptr) {
Res = OldDeclareBlock;
OldDeclareBlock = Res->Prev;
} else {
Res = new DeclareBlock;
}
*Res = { nullptr, nullptr, CurrentDeclareBlock
#ifdef USE_DEBUG
, nullptr
#endif
};
CurrentDeclareBlock = Res;
if (!Unreach) {
Res->StmtBB = LLVMAppendBasicBlock(CurrentFunc, "");
}
}
static void
DestroyDeclareBlock()
{
DeclareBlock *Blk = CurrentDeclareBlock;
CurrentDeclareBlock = Blk->Prev;
Blk->Prev = OldDeclareBlock;
OldDeclareBlock = Blk;
}
extern "C" void
start_subprogram_body(ODnodeSubprg *Func)
{
LLVMBasicBlockRef DeclBB;
// Nested subprograms are not supported.
assert (CurrentFunc == nullptr);
CurrentFunc = Func->Ref;
CurrentFuncDecl = Func;
assert(!Unreach);
DeclBB = LLVMAppendBasicBlock(CurrentFunc, "");
LLVMPositionBuilderAtEnd(DeclBuilder, DeclBB);
CreateDeclareBlock();
LLVMPositionBuilderAtEnd(Builder, CurrentDeclareBlock->StmtBB);
#ifdef USE_DEBUG
if (FlagDebugLines) {
DISubroutineType *Ty;
std::vector<Metadata *> ParamsArr;
if (FlagDebug) {
// First, the return type.
if (Func->Dtype != nullptr)
ParamsArr.push_back(Func->Dtype->Dbg);
else
ParamsArr.push_back(nullptr);
// Then the arguments type.
for (ODnodeInter *Inter: Func->Inters)
ParamsArr.push_back(Inter->Dtype->Dbg);
}
DITypeRefArray Params = DBuilder->getOrCreateTypeArray(ParamsArr);
Ty = DBuilder->createSubroutineType(Params);
#if LLVM_VERSION_MAJOR >= 8
// For LLVM 8.0
DebugCurrentSubprg = DBuilder->createFunction
(DebugCurrentScope, StringRef(Func->Ident.cstr), StringRef(),
DebugCurrentFile, DebugCurrentLine, Ty, DebugCurrentLine,
Func->Storage == O_Storage_Private ? DINode::FlagPrivate : DINode::FlagPublic,
DISubprogram::SPFlagDefinition);
#else
DebugCurrentSubprg = DBuilder->createFunction
(DebugCurrentScope, StringRef(Func->Ident.cstr), StringRef(),
DebugCurrentFile, DebugCurrentLine, Ty,
Func->Storage == O_Storage_Private, true, DebugCurrentLine);
#endif
static_cast<Function*>(unwrap(CurrentFunc))->setSubprogram(DebugCurrentSubprg);
DebugCurrentScope = DebugCurrentSubprg;
unwrap(Builder)->SetCurrentDebugLocation
(DebugLoc::get(DebugCurrentLine, 0, DebugCurrentScope));
}
if (FlagDebug) {
// Crate local variables for arguments
unsigned ArgNo = 1;
for (ODnodeInter *Inter: Func->Inters) {
LLVMValueRef Var;
Var = LLVMBuildAlloca(DeclBuilder, Inter->Dtype->Ref, "");
DILocalVariable *D = DBuilder->createParameterVariable
(DebugCurrentSubprg, StringRef(Inter->Ident.cstr), ArgNo++,
DebugCurrentFile, DebugCurrentLine, Inter->Dtype->Dbg, true);
DBuilder->insertDeclare
(unwrap(Var), D, DBuilder->createExpression(),
DebugLoc::get(DebugCurrentLine, 0, DebugCurrentSubprg),
unwrap(LLVMGetInsertBlock(DeclBuilder)));
LLVMBuildStore(DeclBuilder, Inter->Ref, Var);
Inter->Ref = Var;
}
}
#endif
}
extern "C" void
finish_subprogram_body()
{
// Add a jump from the declare basic block to the first statement BB.
LLVMBuildBr(DeclBuilder, CurrentDeclareBlock->StmtBB);
// Terminate the statement BB
if (!Unreach) {
if (CurrentFuncDecl->Dtype == nullptr)
LLVMBuildRetVoid (Builder);
else
LLVMBuildUnreachable (Builder);
}
DestroyDeclareBlock();
CurrentFunc = nullptr;
Unreach = false;
#ifdef USE_DEBUG
if (FlagDebugLines) {
DBuilder->finalizeSubprogram(DebugCurrentSubprg);
DebugCurrentSubprg = nullptr;
DebugCurrentScope = DebugCurrentCU;
}
#endif
}
extern "C" void
start_declare_stmt ()
{
CreateDeclareBlock();
if (Unreach)
return;
// Add a jump to the new BB.
LLVMBuildBr(Builder, CurrentDeclareBlock->StmtBB);
LLVMPositionBuilderAtEnd(Builder, CurrentDeclareBlock->StmtBB);
#ifdef USE_DEBUG
if (FlagDebug) {
CurrentDeclareBlock->DebugPrevScope = DebugCurrentScope;
DebugCurrentScope = DBuilder->createLexicalBlock
(DebugCurrentScope, DebugCurrentFile, DebugCurrentLine, 0);
}
#endif
}
extern "C" void
finish_declare_stmt ()
{
if (!Unreach) {
LLVMBasicBlockRef Bb;
// Create a basic block for the statements after the dclare
Bb = LLVMAppendBasicBlock(CurrentFunc, "");
if (CurrentDeclareBlock->StackValue != nullptr) {
// Restore stack pointer
LLVMBuildCall(Builder, StackRestoreFun,
&CurrentDeclareBlock->StackValue, 1, "");
}
// Execution will continue on the next statement
LLVMBuildBr(Builder, Bb);
LLVMPositionBuilderAtEnd(Builder, Bb);
#ifdef USE_DEBUG
if (FlagDebug) {
DebugCurrentScope = CurrentDeclareBlock->DebugPrevScope;
}
#endif
}
// Do not reset Unreach.
DestroyDeclareBlock();
}
struct OSNode {
// BB at the entry of the loop. Will branch to it on next statement and
// at the end of the loop.
LLVMBasicBlockRef BBEntry;
// BB after the loop. Exit statement branches to it.
LLVMBasicBlockRef BBExit;
};
extern "C" void
start_loop_stmt (OSNode *Label)
{
if (Unreach) {
*Label = { nullptr, nullptr };
return;
}
*Label = { LLVMAppendBasicBlock(CurrentFunc, ""), nullptr };
#if 1
Label->BBExit = LLVMAppendBasicBlock(CurrentFunc, "");
#endif
LLVMBuildBr(Builder, Label->BBEntry);
LLVMPositionBuilderAtEnd(Builder, Label->BBEntry);
}
extern "C" void
finish_loop_stmt (OSNode *Label)
{
if (!Unreach)
LLVMBuildBr(Builder, Label->BBEntry);
if (Label->BBExit != nullptr) {
// Continue only if the exit was reachable.
LLVMPositionBuilderAtEnd(Builder, Label->BBExit);
Unreach = false;
} else {
Unreach = true;
}
}
extern "C" void
new_exit_stmt (OSNode *Label)
{
if (Unreach)
return;
#if 0
// Currently LABEL is an input (so cannot be modified)
if (Label->BBExit == nullptr) {
// We know the end of the loop is reachable
Label->BBExit = LLVMAppendBasicBlock(CurrentFunc, "");
}
#endif
LLVMBuildBr(Builder, Label->BBExit);
Unreach = true;
}
extern "C" void
new_next_stmt (OSNode *Label)
{
if (Unreach)
return;
LLVMBuildBr(Builder, Label->BBEntry);
Unreach = true;
}
struct OIFBlock {
LLVMBasicBlockRef Bb;
};
extern "C" void
start_if_stmt (OIFBlock *Blk, OEnode Cond)
{
if (Unreach) {
*Blk = { nullptr};
return;
}
LLVMBasicBlockRef BBThen;
// Create BB for Then and Else.
BBThen = LLVMAppendBasicBlock(CurrentFunc, "");
*Blk = { LLVMAppendBasicBlock(CurrentFunc, "") };
LLVMBuildCondBr(Builder, Cond.Ref, BBThen, Blk->Bb);
LLVMPositionBuilderAtEnd(Builder, BBThen);
}
extern "C" void
new_else_stmt (OIFBlock *Blk)
{
LLVMBasicBlockRef BBNext;
if (!Unreach) {
// Create a BB for after the If statement
BBNext = LLVMAppendBasicBlock(CurrentFunc, "");
// And jump to it.
LLVMBuildBr(Builder, BBNext);
} else {
if (Blk->Bb == nullptr) {
// The IF statement was unreachable, so is the Else part.
return;
}
// Do not yet create the BB for after the If statement, as we don't
// know if it is reachable.
BBNext = nullptr;
}
// Use the BB for the Else part.
LLVMPositionBuilderAtEnd(Builder, Blk->Bb);
Blk->Bb = BBNext;
// The Else part is reachable.
Unreach = false;
}
extern "C" void
finish_if_stmt (OIFBlock *Blk)
{
LLVMBasicBlockRef BBNext;
if (!Unreach) {
if (Blk->Bb == nullptr)
BBNext = LLVMAppendBasicBlock(CurrentFunc, "");
else
BBNext = Blk->Bb;
LLVMBuildBr(Builder, BBNext);
LLVMPositionBuilderAtEnd(Builder, BBNext);
} else {
// The branch doesn't continue.
if (Blk->Bb != nullptr) {
// There is at least one fall-through (either from the Then or from
// the Else.
Unreach = false;
LLVMPositionBuilderAtEnd(Builder, Blk->Bb);
}
}
}
struct OChoice {
LLVMValueRef Low, High;
LLVMBasicBlockRef BB;
};
struct OCaseBlock {
// BB before the case.
LLVMBasicBlockRef BBPrev;
// Select expression
LLVMValueRef Value;
OTnode Vtype;
// BB after the case statement
LLVMBasicBlockRef BBNext;
// BB for others
LLVMBasicBlockRef BBOthers;
// BB for the current choice
LLVMBasicBlockRef BBChoice;
std::vector<OChoice> *Choices;
};
extern "C" void
start_case_stmt (OCaseBlock *Blk, OEnode Value)
{
LLVMBasicBlockRef BB;
std::vector<OChoice> *Choices;
if (Unreach) {
// The case statement is unreachable, discard it completly.
BB = nullptr;
Choices = nullptr;
} else {
BB = LLVMGetInsertBlock(Builder);
Choices = new std::vector<OChoice>;
}
*Blk = { BB,
Value.Ref,
Value.Etype,
nullptr,
nullptr,
nullptr,
Choices };
}
// Close previous branch
static void
finishBranch (OCaseBlock *Blk)
{
if (Unreach) {
// No need to close it as this point is not reachable.
return;
}
if (Blk->BBNext == nullptr) {
// Create the BB for after the case statement.
// It also means the end is reachable.
Blk->BBNext = LLVMAppendBasicBlock(CurrentFunc, "");
}
LLVMBuildBr(Builder, Blk->BBNext);
}
extern "C" void
start_choice (OCaseBlock *Blk)
{
if (Blk->BBPrev == nullptr) {
// The wholse case statement was unreachable
assert(Unreach);
return;
}
if (Blk->BBChoice != nullptr) {
// Close previous branch
finishBranch(Blk);
}
// This new choice is reachable from the start of the case statement.
Unreach = false;
// Create a new BB.
Blk->BBChoice = LLVMAppendBasicBlock(CurrentFunc, "");
LLVMPositionBuilderAtEnd(Builder, Blk->BBChoice);
}
// Add a choice that will branch to Blk->BBChoice.
static void
newChoice(OCaseBlock *Blk, LLVMValueRef Low, LLVMValueRef High)
{
if (Unreach)
return;
Blk->Choices->push_back({Low, High, Blk->BBChoice});
}
extern "C" void
new_expr_choice (OCaseBlock *Blk, OCnode *Expr)
{
newChoice(Blk, Expr->Ref, nullptr);
}
extern "C" void
new_range_choice (OCaseBlock *Blk, OCnode *Low, OCnode *High)
{
newChoice(Blk, Low->Ref, High->Ref);
}
extern "C" void
new_default_choice (OCaseBlock *Blk)
{
if (Unreach)
return;
Blk->BBOthers = Blk->BBChoice;
}
extern "C" void
finish_choice (OCaseBlock *Blk)
{
}
extern "C" void
finish_case_stmt (OCaseBlock *Blk)
{
LLVMIntPredicate GE, LE;
if (Blk->BBPrev == nullptr) {
// The whole case statement is not reachable.
return;
}
if (Blk->BBChoice != nullptr) {
// Close previous branch
finishBranch(Blk);
}
// Strategy: use a switch instruction for simple choices, put range choices
// in the default branch, using if statements.
// TODO: could improve the handling of ranges (dichotomy, decision tree...)
switch (Blk->Vtype->Kind) {
case OTKUnsigned:
case OTKEnum:
case OTKBool:
GE = LLVMIntUGE;
LE = LLVMIntULE;
break;
case OTKSigned:
GE = LLVMIntSGE;
LE = LLVMIntSLE;
break;
default:
llvm_unreachable("bad expr type for case");
}
// BB for the default case.
LLVMBasicBlockRef BBDefault = LLVMAppendBasicBlock(CurrentFunc, "");
LLVMPositionBuilderAtEnd(Builder, BBDefault);
// Put range choices in the default case.
unsigned int Count = 0;
LLVMBasicBlockRef BBLast = BBDefault;
for(auto &c: *Blk->Choices) {
if (c.High != nullptr) {
BBLast = LLVMAppendBasicBlock(CurrentFunc, "");
LLVMBuildCondBr(Builder,
LLVMBuildAnd(Builder,
LLVMBuildICmp(Builder, GE,
Blk->Value, c.Low, ""),
LLVMBuildICmp(Builder, LE,
Blk->Value, c.High, ""),
""),
c.BB, BBLast);
LLVMPositionBuilderAtEnd(Builder, BBLast);
} else {
Count++;
}
}
// Insert the switch
LLVMPositionBuilderAtEnd(Builder, Blk->BBPrev);
LLVMValueRef Sw = LLVMBuildSwitch(Builder, Blk->Value, BBDefault, Count);
for(auto &c: *Blk->Choices) {
if (c.High == nullptr) {
LLVMAddCase(Sw, c.Low, c.BB);
}
}
// Insert the others (if there is one).
LLVMPositionBuilderAtEnd(Builder, BBLast);
if (Blk->BBOthers != nullptr)
LLVMBuildBr(Builder, Blk->BBOthers);
else
LLVMBuildUnreachable(Builder);
// Next BB.
if (Blk->BBNext != nullptr) {
Unreach = false;
LLVMPositionBuilderAtEnd(Builder, Blk->BBNext);
} else {
// No branch falls through
Unreach = true;
}
delete Blk->Choices;
}
struct OAssocList {
ODnodeSubprg *Subprg;
unsigned Idx;
LLVMValueRef *Vals;
};
extern "C" void
start_association (OAssocList *Assocs, ODnodeSubprg *Subprg)
{
*Assocs = { Subprg, 0, new LLVMValueRef[Subprg->Inters.size()] };
}
extern "C" void
new_association (OAssocList *Assocs, OEnode Val)
{
Assocs->Vals[Assocs->Idx++] = Val.Ref;
}
extern "C" OEnode
new_function_call (OAssocList *Assocs)
{
LLVMValueRef Res;
if (!Unreach) {
Res = LLVMBuildCall(Builder, Assocs->Subprg->Ref,
Assocs->Vals, Assocs->Subprg->Inters.size(), "");
} else {
Res = nullptr;
}
delete Assocs->Vals;
return { Res, Assocs->Subprg->Dtype };
}
extern "C" void
new_procedure_call (OAssocList *Assocs)
{
if (!Unreach) {
LLVMBuildCall(Builder, Assocs->Subprg->Ref,
Assocs->Vals, Assocs->Subprg->Inters.size(), "");
}
delete Assocs->Vals;
}
extern "C" void
new_func_return_stmt (OEnode Value)
{
if (Unreach)
return;
LLVMValueRef Res = LLVMBuildRet(Builder, Value.Ref);
setDebugLocation(Res);
Unreach = true;
}
extern "C" void
new_proc_return_stmt ()
{
if (Unreach)
return;
LLVMValueRef Res = LLVMBuildRetVoid(Builder);
setDebugLocation(Res);
Unreach = true;
}
enum ONOpKind {
/* Not an operation; invalid. */
ON_Nil,
/* Dyadic operations. */
ON_Add_Ov,
ON_Sub_Ov,
ON_Mul_Ov,
ON_Div_Ov,
ON_Rem_Ov,
ON_Mod_Ov,
/* Binary operations. */
ON_And,
ON_Or,
ON_Xor,
/* Monadic operations. */
ON_Not,
ON_Neg_Ov,
ON_Abs_Ov,
/* Comparaisons */
ON_Eq,
ON_Neq,
ON_Le,
ON_Lt,
ON_Ge,
ON_Gt,
ON_LAST
};
struct ComparePred {
LLVMIntPredicate SignedPred;
LLVMIntPredicate UnsignedPred;
LLVMRealPredicate RealPred;
};
static const ComparePred CompareTable[] = {
{LLVMIntEQ, LLVMIntEQ, LLVMRealOEQ }, // Eq
{LLVMIntNE, LLVMIntNE, LLVMRealONE }, // Ne
{LLVMIntSLE, LLVMIntULE, LLVMRealOLE }, // Le
{LLVMIntSLT, LLVMIntULT, LLVMRealOLT }, // Lt
{LLVMIntSGE, LLVMIntUGE, LLVMRealOGE }, // Ge
{LLVMIntSGT, LLVMIntUGT, LLVMRealOGT } // Gt
};
extern "C" OEnode
new_compare_op (ONOpKind Kind, OEnode Left, OEnode Right, OTnode Rtype)
{
LLVMValueRef Res;
if (Unreach)
return {nullptr, Rtype};
// Cannot apply C convention to ON_Op_Kind, so we need to truncate it
// (as it is represented by a byte from Ada and by int from C)
Kind = static_cast<ONOpKind>(Kind & 0xff);
switch(Left.Etype->Kind) {
case OTKUnsigned:
case OTKEnum:
case OTKBool:
case OTKAccess:
case OTKIncompleteAccess:
Res = LLVMBuildICmp(Builder, CompareTable[Kind - ON_Eq].UnsignedPred,
Left.Ref, Right.Ref, "");
break;
case OTKSigned:
Res = LLVMBuildICmp(Builder, CompareTable[Kind - ON_Eq].SignedPred,
Left.Ref, Right.Ref, "");
break;
case OTKFloat:
Res = LLVMBuildFCmp(Builder, CompareTable[Kind - ON_Eq].RealPred,
Left.Ref, Right.Ref, "");
break;
default:
abort();
}
return {Res, Rtype};
}
extern "C" OEnode
new_monadic_op (ONOpKind Kind, OEnode Operand)
{
LLVMValueRef Res;
if (Unreach)
return { nullptr, Operand.Etype};
// Cannot apply C convention to ON_Op_Kind, so we need to truncate it
// (as it is represented by a byte from Ada and by int from C)
Kind = static_cast<ONOpKind>(Kind & 0xff);
switch (Operand.Etype->Kind) {
case OTKUnsigned:
case OTKSigned:
case OTKBool:
switch (Kind) {
case ON_Not:
Res = LLVMBuildNot(Builder, Operand.Ref, "");
break;
case ON_Neg_Ov:
Res = LLVMBuildNeg(Builder, Operand.Ref, "");
break;
case ON_Abs_Ov:
Res = LLVMBuildSelect
(Builder,
LLVMBuildICmp (Builder, LLVMIntSLT,
Operand.Ref,
LLVMConstInt(Operand.Etype->Ref, 0, 0),
""),
LLVMBuildNeg(Builder, Operand.Ref, ""),
Operand.Ref,
"");
break;
default:
llvm_unreachable("bad scalar monadic op");
}
break;
case OTKFloat:
switch (Kind) {
case ON_Neg_Ov:
Res = LLVMBuildFNeg(Builder, Operand.Ref, "");
break;
case ON_Abs_Ov:
Res = LLVMBuildSelect
(Builder,
LLVMBuildFCmp (Builder, LLVMRealOLT,
Operand.Ref,
LLVMConstReal(Operand.Etype->Ref, 0.0),
""),
LLVMBuildFNeg(Builder, Operand.Ref, ""),
Operand.Ref,
"");
break;
default:
abort();
}
break;
default:
abort();
}
return {Res, Operand.Etype};
}
static LLVMValueRef
BuildSMod(LLVMBuilderRef Build, LLVMValueRef L, LLVMValueRef R, const char *s)
{
LLVMTypeRef T = LLVMTypeOf(L);
LLVMBasicBlockRef NormalBB;
LLVMBasicBlockRef AdjustBB;
LLVMBasicBlockRef NextBB;
LLVMValueRef PhiVals[3];
LLVMBasicBlockRef PhiBB[3];
NextBB = LLVMAppendBasicBlock(CurrentFunc, "");
NormalBB = LLVMAppendBasicBlock(CurrentFunc, "");
// Avoid overflow with -1
// if R = -1 then
// result := 0;
// else
// ...
LLVMValueRef Cond;
Cond = LLVMBuildICmp(Builder, LLVMIntEQ, R, LLVMConstAllOnes(T), "");
LLVMBuildCondBr(Builder, Cond, NextBB, NormalBB);
PhiBB[0] = LLVMGetInsertBlock(Builder);
PhiVals[0] = LLVMConstNull(T);
// Rm := Left rem Right
LLVMPositionBuilderAtEnd(Builder, NormalBB);
LLVMValueRef Rm = LLVMBuildSRem(Builder, L, R, s);
// if Rm = 0 then
// result := 0
// else
AdjustBB = LLVMAppendBasicBlock(CurrentFunc, "");
Cond = LLVMBuildICmp(Builder, LLVMIntEQ, Rm, LLVMConstNull(T), "");
LLVMBuildCondBr(Builder, Cond, NextBB, AdjustBB);
PhiBB[1] = NormalBB;
PhiVals[1] = LLVMConstNull(T);
// if (L xor R) < 0 then
// result := Rm + R
// else
// result := Rm
LLVMPositionBuilderAtEnd(Builder, AdjustBB);
LLVMValueRef RXor = LLVMBuildXor(Builder, L, R, "");
Cond = LLVMBuildICmp(Builder, LLVMIntSLT, RXor, LLVMConstNull(T), "");
LLVMValueRef RmPlusR = LLVMBuildAdd(Builder, Rm, R, "");
LLVMValueRef Adj = LLVMBuildSelect(Builder, Cond, RmPlusR, Rm, "");
LLVMBuildBr(Builder, NextBB);
PhiBB[2] = AdjustBB;
PhiVals[2] = Adj;
// The Phi node
LLVMPositionBuilderAtEnd(Builder, NextBB);
LLVMValueRef Phi = LLVMBuildPhi(Builder, T, "");
LLVMAddIncoming(Phi, PhiVals, PhiBB, 3);
return Phi;
}
extern "C" OEnode
new_dyadic_op (ONOpKind Kind, OEnode Left, OEnode Right)
{
LLVMValueRef Res;
LLVMValueRef (*Build)(LLVMBuilderRef, LLVMValueRef, LLVMValueRef, const char *);
OTKind ArgKind = Left.Etype->Kind;
if (Unreach)
return { nullptr, Left.Etype};
// Cannot apply C convention to ON_Op_Kind, so we need to truncate it
// (as it is represented by a byte from Ada and by int from C)
Kind = static_cast<ONOpKind>(Kind & 0xff);
switch (ArgKind) {
case OTKUnsigned:
case OTKSigned:
case OTKBool:
case OTKEnum:
switch (Kind) {
case ON_And:
Build = &LLVMBuildAnd;
break;
case ON_Or:
Build = &LLVMBuildOr;
break;
case ON_Xor:
Build = &LLVMBuildXor;
break;
case ON_Add_Ov:
Build = &LLVMBuildAdd;
break;
case ON_Sub_Ov:
Build = &LLVMBuildSub;
break;
case ON_Mul_Ov:
Build = &LLVMBuildMul;
break;
case ON_Div_Ov:
if (ArgKind == OTKUnsigned)
Build = &LLVMBuildUDiv;
else
Build = &LLVMBuildSDiv;
break;
case ON_Mod_Ov:
if (ArgKind == OTKUnsigned)
Build = &LLVMBuildURem;
else
Build = &BuildSMod;
break;
case ON_Rem_Ov:
if (ArgKind == OTKUnsigned)
Build = &LLVMBuildURem;
else
Build = &LLVMBuildSRem;
break;
default:
abort();
}
break;
case OTKFloat:
switch (Kind) {
case ON_Add_Ov:
Build = &LLVMBuildFAdd;
break;
case ON_Sub_Ov:
Build = &LLVMBuildFSub;
break;
case ON_Mul_Ov:
Build = &LLVMBuildFMul;
break;
case ON_Div_Ov:
Build = &LLVMBuildFDiv;
break;
default:
llvm_unreachable("bad float dyadic op");
}
break;
default:
abort();
}
Res = Build(Builder, Left.Ref, Right.Ref, "");
return {Res, Left.Etype};
}
extern "C" OEnode
new_convert (OEnode Val, OTnode Rtype)
{
if (Unreach) {
return {nullptr, Rtype};
}
if (Rtype == Val.Etype) {
// Same type, nothing to do
return Val;
}
if (Rtype->Ref == Val.Etype->Ref) {
// Same undelaying LLVM type. No conversion.
return {Val.Ref, Rtype};
}
LLVMValueRef Res;
switch(Rtype->Kind) {
case OTKUnsigned:
case OTKSigned:
case OTKEnum:
case OTKBool:
switch(Val.Etype->Kind) {
case OTKUnsigned:
case OTKSigned:
case OTKEnum:
case OTKBool:
// Int to Int
if (static_cast<OTnodeScal*>(Val.Etype)->ScalSize
> static_cast<OTnodeScal*>(Rtype)->ScalSize)
Res = LLVMBuildTrunc(Builder, Val.Ref, Rtype->Ref, "");
else if (static_cast<OTnodeScal*>(Val.Etype)->ScalSize
< static_cast<OTnodeScal*>(Rtype)->ScalSize) {
if (Val.Etype->Kind == OTKSigned)
Res = LLVMBuildSExt(Builder, Val.Ref, Rtype->Ref, "");
else
Res = LLVMBuildZExt(Builder, Val.Ref, Rtype->Ref, "");
} else {
Res = LLVMBuildBitCast(Builder, Val.Ref, Rtype->Ref, "");
}
break;
case OTKFloat:
// Float to Int
{
LLVMValueRef V;
LLVMValueRef Args[2];
Args[0] = Fp0_5;
Args[1] = Val.Ref;
V = LLVMBuildCall(Builder, CopySignFun, Args, 2, "");
V = LLVMBuildFAdd(Builder, V, Val.Ref, "");
Res = LLVMBuildFPToSI(Builder, V, Rtype->Ref, "");
}
break;
default:
llvm_unreachable("bad convert type");
}
break;
case OTKFloat:
// x to Float
switch (Val.Etype->Kind) {
case OTKSigned:
Res = LLVMBuildSIToFP(Builder, Val.Ref, Rtype->Ref, "");
break;
case OTKUnsigned:
Res = LLVMBuildUIToFP(Builder, Val.Ref, Rtype->Ref, "");
break;
default:
abort();
}
break;
case OTKAccess:
case OTKIncompleteAccess:
assert(LLVMGetTypeKind(LLVMTypeOf(Val.Ref)) == LLVMPointerTypeKind);
Res = LLVMBuildBitCast(Builder, Val.Ref, Rtype->Ref, "");
break;
default:
abort();
}
return {Res, Rtype};
}
extern "C" OEnode
new_convert_ov (OEnode Val, OTnode Rtype)
{
return new_convert(Val, Rtype);
}
extern "C" OEnode
new_alloca (OTnode Rtype, OEnode Size)
{
LLVMValueRef Res;
if (Unreach)
Res = nullptr;
else {
if (CurrentDeclareBlock->StackValue != nullptr
&& CurrentDeclareBlock->Prev != nullptr) {
// Save the stack pointer at the entry of the block.
LLVMValueRef FirstInsn =
LLVMGetFirstInstruction(CurrentDeclareBlock->StmtBB);
LLVMBuilderRef Bld;
if (FirstInsn == nullptr) {
// Alloca is the first instruction
Bld = Builder;
} else {
LLVMPositionBuilderBefore(ExtraBuilder, FirstInsn);
Bld = ExtraBuilder;
}
CurrentDeclareBlock->StackValue =
LLVMBuildCall(Bld, StackSaveFun, nullptr, 0, "");
}
Res = LLVMBuildArrayAlloca(Builder, LLVMInt8Type(), Size.Ref, "");
// Convert
Res = LLVMBuildBitCast(Builder, Res, Rtype->Ref, "");
}
return {Res, Rtype};
}
extern "C" OCnode
new_subprogram_address (ODnodeSubprg *Subprg, OTnode Atype)
{
return { LLVMConstBitCast(Subprg->Ref, Atype->Ref), Atype };
}
struct OGnode {
LLVMValueRef Ref;
OTnode Gtype;
};
extern "C" OGnode
new_global (ODnode Decl)
{
return {Decl->Ref, Decl->Dtype };
}
extern "C" OGnode
new_global_selected_element (OGnode Rec, OFnodeBase *El)
{
LLVMValueRef Res;
switch(El->Kind) {
case OF_Record:
{
LLVMValueRef Idx[2];
Idx[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
Idx[1] = LLVMConstInt(LLVMInt32Type(),
static_cast<OFnodeRec *>(El)->Index, 0);
Res = LLVMConstGEP(Rec.Ref, Idx, 2);
}
break;
case OF_Union:
Res = LLVMConstBitCast(Rec.Ref, static_cast<OFnodeUnion *>(El)->PtrType);
break;
}
return {Res, El->FType};
}
extern "C" OCnode
new_global_unchecked_address (OGnode Lvalue, OTnode Atype)
{
return {LLVMConstBitCast(Lvalue.Ref, Atype->Ref), Atype};
}
extern "C" OCnode
new_global_address (OGnode Lvalue, OTnode Atype)
{
return new_global_unchecked_address(Lvalue, Atype);
}
struct OLnode {
bool Direct;
LLVMValueRef Ref;
OTnode Ltype;
};
extern "C" OLnode
new_obj (ODnode Obj)
{
switch(Obj->getKind()) {
case ODKConst:
case ODKVar:
case ODKLocal:
return { false, Obj->Ref, Obj->Dtype };
case ODKInterface:
#ifdef USE_DEBUG
if (FlagDebug) {
// The argument was allocated on the stack
return { false, Obj->Ref, Obj->Dtype };
}
#endif
return { true, Obj->Ref, Obj->Dtype };
case ODKType:
case ODKSubprg:
default:
llvm_unreachable("bad new_obj obj");
}
}
extern "C" OEnode
new_value (OLnode *Lvalue)
{
LLVMValueRef Res;
if (Unreach)
Res = nullptr;
else {
if (Lvalue->Direct)
Res = Lvalue->Ref;
else
Res = LLVMBuildLoad(Builder, Lvalue->Ref, "");
}
return {Res, Lvalue->Ltype };
}
extern "C" OEnode
new_obj_value (ODnode Obj)
{
OLnode t = new_obj(Obj);
return new_value (&t);
}
extern "C" OLnode
new_indexed_element (OLnode *Arr, OEnode Index)
{
LLVMValueRef Idx[2];
LLVMValueRef Res;
if (Unreach)
Res = nullptr;
else {
Idx[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
Idx[1] = Index.Ref;
Res = LLVMBuildGEP(Builder, Arr->Ref, Idx, 2, "");
}
return { false, Res, static_cast<OTnodeArr *>(Arr->Ltype)->ElType };
}
extern "C" OLnode
new_slice (OLnode *Arr, OTnode Rtype, OEnode Index)
{
LLVMValueRef Idx[2];
LLVMValueRef Res;
if (Unreach)
Res = nullptr;
else {
Idx[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
Idx[1] = Index.Ref;
Res = LLVMBuildGEP(Builder, Arr->Ref, Idx, 2, "");
Res = LLVMBuildBitCast(Builder, Res, LLVMPointerType(Rtype->Ref, 0), "");
}
return { false, Res, Rtype};
}
extern "C" OLnode
new_selected_element (OLnode *Rec, OFnodeBase *El)
{
LLVMValueRef Res;
if (Unreach)
Res = nullptr;
else {
switch(El->Kind) {
case OF_Record:
{
LLVMValueRef Idx[2];
Idx[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
Idx[1] = LLVMConstInt(LLVMInt32Type(),
static_cast<OFnodeRec *>(El)->Index, 0);
Res = LLVMBuildGEP(Builder, Rec->Ref, Idx, 2, "");
}
break;
case OF_Union:
Res = LLVMBuildBitCast(Builder, Rec->Ref,
static_cast<OFnodeUnion *>(El)->PtrType, "");
break;
}
}
return { false, Res, El->FType };
}
extern "C" OLnode
new_access_element (OEnode Acc)
{
LLVMValueRef Res;
switch(Acc.Etype->Kind) {
case OTKAccess:
Res = Acc.Ref;
break;
case OTKIncompleteAccess:
// Unwrap the structure
{
LLVMValueRef Idx[2];
Idx[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
Idx[1] = LLVMConstInt(LLVMInt32Type(), 0, 0);
Res = LLVMBuildGEP(Builder, Acc.Ref, Idx, 2, "");
}
break;
default:
llvm_unreachable("bad new_access_element");
}
return {false, Res, static_cast<OTnodeAccBase *>(Acc.Etype)->Acc };
}
extern "C" OEnode
new_unchecked_address (OLnode *Lvalue, OTnode Atype)
{
LLVMValueRef Res;
if (Unreach)
Res = nullptr;
else
Res = LLVMBuildBitCast(Builder, Lvalue->Ref, Atype->Ref, "");
return {Res, Atype};
}
extern "C" OEnode
new_address (OLnode *Lvalue, OTnode Atype)
{
return new_unchecked_address(Lvalue, Atype);
}
extern "C" void
new_assign_stmt (OLnode *Target, OEnode Value)
{
assert (!Target->Direct);
if (Unreach)
return;
LLVMValueRef Res = LLVMBuildStore(Builder, Value.Ref, Target->Ref);
setDebugLocation(Res);
}
extern "C" void
new_debug_line_decl (unsigned Line)
{
#ifdef USE_DEBUG
DebugCurrentLine = Line;
#endif
}
extern "C" void
new_debug_line_stmt (unsigned Line)
{
#ifdef USE_DEBUG
if (FlagDebugLines && Line != DebugCurrentLine) {
DebugCurrentLine = Line;
unwrap(Builder)->SetCurrentDebugLocation
(DebugLoc::get(DebugCurrentLine, 0, DebugCurrentScope));
}
#endif
}
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