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llvmhelpers.cpp
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//===-- llvmhelpers.cpp ---------------------------------------------------===//
//
// LDC – the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
#include "gen/llvmhelpers.h"
#include "dmd/declaration.h"
#include "dmd/errors.h"
#include "dmd/expression.h"
#include "dmd/id.h"
#include "dmd/identifier.h"
#include "dmd/init.h"
#include "dmd/module.h"
#include "dmd/template.h"
#include "gen/abi.h"
#include "gen/arrays.h"
#include "gen/cl_helpers.h"
#include "gen/classes.h"
#include "gen/complex.h"
#include "gen/dvalue.h"
#include "gen/dynamiccompile.h"
#include "gen/funcgenstate.h"
#include "gen/functions.h"
#include "gen/irstate.h"
#include "gen/llvm.h"
#include "gen/logger.h"
#include "gen/nested.h"
#include "gen/mangling.h"
#include "gen/pragma.h"
#include "gen/runtime.h"
#include "gen/tollvm.h"
#include "gen/typinf.h"
#include "gen/uda.h"
#include "ir/irfunction.h"
#include "ir/irmodule.h"
#include "ir/irtypeaggr.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
#include <stack>
llvm::cl::opt<llvm::GlobalVariable::ThreadLocalMode> clThreadModel(
"fthread-model", llvm::cl::ZeroOrMore, llvm::cl::desc("Thread model"),
llvm::cl::init(llvm::GlobalVariable::GeneralDynamicTLSModel),
llvm::cl::values(clEnumValN(llvm::GlobalVariable::GeneralDynamicTLSModel,
"global-dynamic",
"Global dynamic TLS model (default)"),
clEnumValN(llvm::GlobalVariable::LocalDynamicTLSModel,
"local-dynamic", "Local dynamic TLS model"),
clEnumValN(llvm::GlobalVariable::InitialExecTLSModel,
"initial-exec", "Initial exec TLS model"),
clEnumValN(llvm::GlobalVariable::LocalExecTLSModel,
"local-exec", "Local exec TLS model")));
/******************************************************************************
* Simple Triple helpers for DFE
* TODO: find better location for this
******************************************************************************/
bool isTargetWindowsMSVC() {
return global.params.targetTriple->isWindowsMSVCEnvironment();
}
/******************************************************************************
* Global context
******************************************************************************/
static llvm::ManagedStatic<llvm::LLVMContext> GlobalContext;
llvm::LLVMContext &getGlobalContext() { return *GlobalContext; }
/******************************************************************************
* DYNAMIC MEMORY HELPERS
******************************************************************************/
LLValue *DtoNew(const Loc &loc, Type *newtype) {
// get runtime function
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_allocmemoryT");
// get type info
LLConstant *ti = DtoTypeInfoOf(loc, newtype);
assert(isaPointer(ti));
// call runtime allocator
LLValue *mem = gIR->CreateCallOrInvoke(fn, ti, ".gc_mem");
// cast
return DtoBitCast(mem, DtoPtrToType(newtype), ".gc_mem");
}
LLValue *DtoNewStruct(const Loc &loc, TypeStruct *newtype) {
llvm::Function *fn = getRuntimeFunction(
loc, gIR->module,
newtype->isZeroInit(newtype->sym->loc) ? "_d_newitemT" : "_d_newitemiT");
LLConstant *ti = DtoTypeInfoOf(loc, newtype);
LLValue *mem = gIR->CreateCallOrInvoke(fn, ti, ".gc_struct");
return DtoBitCast(mem, DtoPtrToType(newtype), ".gc_struct");
}
void DtoDeleteMemory(const Loc &loc, DValue *ptr) {
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_delmemory");
LLValue *lval = (ptr->isLVal() ? DtoLVal(ptr) : makeLValue(loc, ptr));
gIR->CreateCallOrInvoke(
fn, DtoBitCast(lval, fn->getFunctionType()->getParamType(0)));
}
void DtoDeleteStruct(const Loc &loc, DValue *ptr) {
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_delstruct");
LLValue *lval = (ptr->isLVal() ? DtoLVal(ptr) : makeLValue(loc, ptr));
gIR->CreateCallOrInvoke(
fn, DtoBitCast(lval, fn->getFunctionType()->getParamType(0)),
DtoBitCast(DtoTypeInfoOf(loc, ptr->type->nextOf()),
fn->getFunctionType()->getParamType(1)));
}
void DtoDeleteClass(const Loc &loc, DValue *inst) {
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_delclass");
LLValue *lval = (inst->isLVal() ? DtoLVal(inst) : makeLValue(loc, inst));
gIR->CreateCallOrInvoke(
fn, DtoBitCast(lval, fn->getFunctionType()->getParamType(0)));
}
void DtoDeleteInterface(const Loc &loc, DValue *inst) {
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_delinterface");
LLValue *lval = (inst->isLVal() ? DtoLVal(inst) : makeLValue(loc, inst));
gIR->CreateCallOrInvoke(
fn, DtoBitCast(lval, fn->getFunctionType()->getParamType(0)));
}
void DtoDeleteArray(const Loc &loc, DValue *arr) {
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_delarray_t");
llvm::FunctionType *fty = fn->getFunctionType();
// the TypeInfo argument must be null if the type has no dtor
Type *elementType = arr->type->nextOf();
bool hasDtor = (elementType->toBasetype()->ty == Tstruct &&
elementType->needsDestruction());
LLValue *typeInfo = !hasDtor ? getNullPtr(fty->getParamType(1))
: DtoTypeInfoOf(loc, elementType);
LLValue *lval = (arr->isLVal() ? DtoLVal(arr) : makeLValue(loc, arr));
gIR->CreateCallOrInvoke(fn, DtoBitCast(lval, fty->getParamType(0)),
DtoBitCast(typeInfo, fty->getParamType(1)));
}
/******************************************************************************
* ALIGNMENT HELPERS
******************************************************************************/
unsigned DtoAlignment(Type *type) {
structalign_t alignment = type->alignment();
if (alignment == STRUCTALIGN_DEFAULT) {
auto ts = type->toBasetype()->isTypeStruct();
if (!ts || ts->sym->members) // not an opaque struct
alignment = type->alignsize();
}
return (alignment == STRUCTALIGN_DEFAULT ? 0 : alignment);
}
unsigned DtoAlignment(VarDeclaration *vd) {
return vd->alignment == STRUCTALIGN_DEFAULT ? DtoAlignment(vd->type)
: vd->alignment;
}
/******************************************************************************
* ALLOCA HELPERS
******************************************************************************/
llvm::AllocaInst *DtoAlloca(Type *type, const char *name) {
return DtoRawAlloca(DtoMemType(type), DtoAlignment(type), name);
}
llvm::AllocaInst *DtoAlloca(VarDeclaration *vd, const char *name) {
return DtoRawAlloca(DtoMemType(vd->type), DtoAlignment(vd), name);
}
llvm::AllocaInst *DtoArrayAlloca(Type *type, unsigned arraysize,
const char *name) {
LLType *lltype = DtoType(type);
auto ai = new llvm::AllocaInst(
lltype, gIR->module.getDataLayout().getAllocaAddrSpace(),
DtoConstUint(arraysize), name, gIR->topallocapoint());
if (auto alignment = DtoAlignment(type)) {
ai->setAlignment(LLAlign(alignment));
}
return ai;
}
llvm::AllocaInst *DtoRawAlloca(LLType *lltype, size_t alignment,
const char *name) {
auto ai = new llvm::AllocaInst(
lltype, gIR->module.getDataLayout().getAllocaAddrSpace(), name,
gIR->topallocapoint());
if (alignment) {
ai->setAlignment(LLAlign(alignment));
}
return ai;
}
LLValue *DtoGcMalloc(const Loc &loc, LLType *lltype, const char *name) {
// get runtime function
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, "_d_allocmemory");
// parameters
LLValue *size = DtoConstSize_t(getTypeAllocSize(lltype));
// call runtime allocator
LLValue *mem = gIR->CreateCallOrInvoke(fn, size, name);
// cast
return DtoBitCast(mem, getPtrToType(lltype), name);
}
LLValue *DtoAllocaDump(DValue *val, const char *name) {
return DtoAllocaDump(val, val->type, name);
}
LLValue *DtoAllocaDump(DValue *val, int alignment, const char *name) {
return DtoAllocaDump(val, DtoType(val->type), alignment, name);
}
LLValue *DtoAllocaDump(DValue *val, Type *asType, const char *name) {
return DtoAllocaDump(val, DtoType(asType), DtoAlignment(asType), name);
}
LLValue *DtoAllocaDump(DValue *val, LLType *asType, int alignment,
const char *name) {
if (val->isLVal()) {
LLValue *lval = DtoLVal(val);
LLType *asMemType = i1ToI8(voidToI8(asType));
LLValue *copy = DtoRawAlloca(asMemType, alignment, name);
const auto minSize =
std::min(getTypeAllocSize(lval->getType()->getPointerElementType()),
getTypeAllocSize(asMemType));
const auto minAlignment =
std::min(DtoAlignment(val->type), static_cast<unsigned>(alignment));
DtoMemCpy(copy, lval, DtoConstSize_t(minSize), minAlignment);
// TODO: zero-out any remaining bytes?
return copy;
}
return DtoAllocaDump(DtoRVal(val), asType, alignment, name);
}
LLValue *DtoAllocaDump(LLValue *val, int alignment, const char *name) {
return DtoAllocaDump(val, val->getType(), alignment, name);
}
LLValue *DtoAllocaDump(LLValue *val, Type *asType, const char *name) {
return DtoAllocaDump(val, DtoType(asType), DtoAlignment(asType), name);
}
LLValue *DtoAllocaDump(LLValue *val, LLType *asType, int alignment,
const char *name) {
LLType *memType = i1ToI8(voidToI8(val->getType()));
LLType *asMemType = i1ToI8(voidToI8(asType));
LLType *allocaType =
(getTypeStoreSize(memType) <= getTypeAllocSize(asMemType) ? asMemType
: memType);
LLValue *mem = DtoRawAlloca(allocaType, alignment, name);
DtoStoreZextI8(val, DtoBitCast(mem, memType->getPointerTo()));
return DtoBitCast(mem, asMemType->getPointerTo());
}
/******************************************************************************
* ASSERT HELPER
******************************************************************************/
void DtoAssert(Module *M, const Loc &loc, DValue *msg) {
// func
const char *fname = msg ? "_d_assert_msg" : "_d_assert";
llvm::Function *fn = getRuntimeFunction(loc, gIR->module, fname);
// Arguments
llvm::SmallVector<LLValue *, 3> args;
// msg param
if (msg) {
args.push_back(DtoRVal(msg));
}
// file param
args.push_back(DtoModuleFileName(M, loc));
// line param
args.push_back(DtoConstUint(loc.linnum));
// call
gIR->CreateCallOrInvoke(fn, args);
// after assert is always unreachable
gIR->ir->CreateUnreachable();
}
void DtoCAssert(Module *M, const Loc &loc, LLValue *msg) {
const auto &triple = *global.params.targetTriple;
const auto file =
DtoConstCString(loc.filename ? loc.filename : M->srcfile.toChars());
const auto line = DtoConstUint(loc.linnum);
const auto fn = getCAssertFunction(loc, gIR->module);
llvm::SmallVector<LLValue *, 4> args;
if (triple.isOSDarwin()) {
const auto irFunc = gIR->func();
const auto funcName =
irFunc && irFunc->decl ? irFunc->decl->toPrettyChars() : "";
args.push_back(DtoConstCString(funcName));
args.push_back(file);
args.push_back(line);
args.push_back(msg);
} else if (triple.isOSSolaris() || triple.isMusl() ||
global.params.isUClibcEnvironment) {
const auto irFunc = gIR->func();
const auto funcName =
(irFunc && irFunc->decl) ? irFunc->decl->toPrettyChars() : "";
args.push_back(msg);
args.push_back(file);
args.push_back(line);
args.push_back(DtoConstCString(funcName));
} else if (triple.getEnvironment() == llvm::Triple::Android) {
args.push_back(file);
args.push_back(line);
args.push_back(msg);
} else {
args.push_back(msg);
args.push_back(file);
args.push_back(line);
}
gIR->CreateCallOrInvoke(fn, args);
gIR->ir->CreateUnreachable();
}
/******************************************************************************
* MODULE FILE NAME
******************************************************************************/
LLConstant *DtoModuleFileName(Module *M, const Loc &loc) {
return DtoConstString(loc.filename ? loc.filename : M->srcfile.toChars());
}
/******************************************************************************
* GOTO HELPER
******************************************************************************/
void DtoGoto(const Loc &loc, LabelDsymbol *target) {
assert(!gIR->scopereturned());
LabelStatement *lblstmt = target->statement;
if (!lblstmt) {
error(loc, "the label `%s` does not exist", target->ident->toChars());
fatal();
}
gIR->funcGen().jumpTargets.jumpToLabel(loc, target->ident);
}
/******************************************************************************
* ASSIGNMENT HELPER (store this in that)
******************************************************************************/
// is this a good approach at all ?
void DtoAssign(const Loc &loc, DValue *lhs, DValue *rhs, int op,
bool canSkipPostblit) {
IF_LOG Logger::println("DtoAssign()");
LOG_SCOPE;
Type *t = lhs->type->toBasetype();
assert(t->ty != Tvoid && "Cannot assign values of type void.");
if (t->ty == Tbool) {
DtoStoreZextI8(DtoRVal(rhs), DtoLVal(lhs));
} else if (t->ty == Tstruct) {
// don't copy anything to empty structs
if (static_cast<TypeStruct *>(t)->sym->fields.length > 0) {
llvm::Value *src = DtoLVal(rhs);
llvm::Value *dst = DtoLVal(lhs);
// Check whether source and destination values are the same at compile
// time as to not emit an invalid (overlapping) memcpy on trivial
// struct self-assignments like 'A a; a = a;'.
if (src != dst)
DtoMemCpy(dst, src);
}
} else if (t->ty == Tarray || t->ty == Tsarray) {
DtoArrayAssign(loc, lhs, rhs, op, canSkipPostblit);
} else if (t->ty == Tdelegate) {
LLValue *l = DtoLVal(lhs);
LLValue *r = DtoRVal(rhs);
IF_LOG {
Logger::cout() << "lhs: " << *l << '\n';
Logger::cout() << "rhs: " << *r << '\n';
}
DtoStore(r, l);
} else if (t->ty == Tclass) {
assert(rhs->type->toBasetype()->ty == Tclass);
LLValue *l = DtoLVal(lhs);
LLValue *r = DtoRVal(rhs);
IF_LOG {
Logger::cout() << "l : " << *l << '\n';
Logger::cout() << "r : " << *r << '\n';
}
r = DtoBitCast(r, l->getType()->getContainedType(0));
DtoStore(r, l);
} else if (t->iscomplex()) {
LLValue *dst = DtoLVal(lhs);
LLValue *src = DtoRVal(DtoCast(loc, rhs, lhs->type));
DtoStore(src, dst);
} else {
LLValue *l = DtoLVal(lhs);
LLValue *r = DtoRVal(rhs);
IF_LOG {
Logger::cout() << "lhs: " << *l << '\n';
Logger::cout() << "rhs: " << *r << '\n';
}
LLType *lit = l->getType()->getContainedType(0);
if (r->getType() != lit) {
r = DtoRVal(DtoCast(loc, rhs, lhs->type));
IF_LOG {
Logger::println("Type mismatch, really assigning:");
LOG_SCOPE
Logger::cout() << "lhs: " << *l << '\n';
Logger::cout() << "rhs: " << *r << '\n';
}
#if 1
if (r->getType() !=
lit) { // It's weird but it happens. TODO: try to remove this hack
r = DtoBitCast(r, lit);
}
#else
assert(r->getType() == lit);
#endif
}
gIR->ir->CreateStore(r, l);
}
}
/******************************************************************************
* NULL VALUE HELPER
******************************************************************************/
DValue *DtoNullValue(Type *type, Loc loc) {
Type *basetype = type->toBasetype();
TY basety = basetype->ty;
LLType *lltype = DtoType(basetype);
// complex, needs to be first since complex are also floating
if (basetype->iscomplex()) {
LLType *basefp = DtoComplexBaseType(basetype);
LLValue *res = DtoAggrPair(DtoType(type), LLConstant::getNullValue(basefp),
LLConstant::getNullValue(basefp));
return new DImValue(type, res);
}
// integer, floating, pointer, assoc array, delegate and class have no special
// representation
if (basetype->isintegral() || basetype->isfloating() || basety == Tpointer ||
basety == Tnull || basety == Tclass || basety == Tdelegate ||
basety == Taarray) {
return new DNullValue(type, LLConstant::getNullValue(lltype));
}
// dynamic array
if (basety == Tarray) {
LLValue *len = DtoConstSize_t(0);
LLValue *ptr = getNullPtr(DtoPtrToType(basetype->nextOf()));
return new DSliceValue(type, len, ptr);
}
error(loc, "`null` not known for type `%s`", type->toChars());
fatal();
}
/******************************************************************************
* CASTING HELPERS
******************************************************************************/
DValue *DtoCastInt(const Loc &loc, DValue *val, Type *_to) {
LLType *tolltype = DtoType(_to);
Type *to = _to->toBasetype();
Type *from = val->type->toBasetype();
assert(from->isintegral());
LLValue *rval = DtoRVal(val);
if (rval->getType() == tolltype) {
return new DImValue(_to, rval);
}
size_t fromsz = from->size();
size_t tosz = to->size();
if (to->ty == Tbool) {
LLValue *zero = LLConstantInt::get(rval->getType(), 0, false);
rval = gIR->ir->CreateICmpNE(rval, zero);
} else if (to->isintegral()) {
if (fromsz < tosz || from->ty == Tbool) {
IF_LOG Logger::cout() << "cast to: " << *tolltype << '\n';
if (isLLVMUnsigned(from) || from->ty == Tbool) {
rval = new llvm::ZExtInst(rval, tolltype, "", gIR->scopebb());
} else {
rval = new llvm::SExtInst(rval, tolltype, "", gIR->scopebb());
}
} else if (fromsz > tosz) {
rval = new llvm::TruncInst(rval, tolltype, "", gIR->scopebb());
} else {
rval = DtoBitCast(rval, tolltype);
}
} else if (to->iscomplex()) {
return DtoComplex(loc, to, val);
} else if (to->isfloating()) {
if (from->isunsigned()) {
rval = new llvm::UIToFPInst(rval, tolltype, "", gIR->scopebb());
} else {
rval = new llvm::SIToFPInst(rval, tolltype, "", gIR->scopebb());
}
} else if (to->ty == Tpointer) {
IF_LOG Logger::cout() << "cast pointer: " << *tolltype << '\n';
rval = gIR->ir->CreateIntToPtr(rval, tolltype);
} else {
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
_to->toChars());
fatal();
}
return new DImValue(_to, rval);
}
DValue *DtoCastPtr(const Loc &loc, DValue *val, Type *to) {
LLType *tolltype = DtoType(to);
Type *totype = to->toBasetype();
Type *fromtype = val->type->toBasetype();
(void)fromtype;
assert(fromtype->ty == Tpointer || fromtype->ty == Tfunction);
LLValue *rval;
if (totype->ty == Tpointer || totype->ty == Tclass || totype->ty == Taarray) {
LLValue *src = DtoRVal(val);
IF_LOG {
Logger::cout() << "src: " << *src << '\n';
Logger::cout() << "to type: " << *tolltype << '\n';
}
rval = DtoBitCast(src, tolltype);
} else if (totype->ty == Tbool) {
LLValue *src = DtoRVal(val);
LLValue *zero = LLConstant::getNullValue(src->getType());
rval = gIR->ir->CreateICmpNE(src, zero);
} else if (totype->isintegral()) {
rval = new llvm::PtrToIntInst(DtoRVal(val), tolltype, "", gIR->scopebb());
} else {
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
to->toChars());
fatal();
}
return new DImValue(to, rval);
}
DValue *DtoCastFloat(const Loc &loc, DValue *val, Type *to) {
if (val->type == to) {
return val;
}
LLType *tolltype = DtoType(to);
Type *totype = to->toBasetype();
Type *fromtype = val->type->toBasetype();
assert(fromtype->isfloating());
size_t fromsz = fromtype->size();
size_t tosz = totype->size();
LLValue *rval;
if (totype->ty == Tbool) {
rval = DtoRVal(val);
LLValue *zero = LLConstant::getNullValue(rval->getType());
rval = gIR->ir->CreateFCmpUNE(rval, zero);
} else if (totype->iscomplex()) {
return DtoComplex(loc, to, val);
} else if (totype->isfloating()) {
if (fromsz == tosz) {
rval = DtoRVal(val);
assert(rval->getType() == tolltype);
} else if (fromsz < tosz) {
rval = new llvm::FPExtInst(DtoRVal(val), tolltype, "", gIR->scopebb());
} else if (fromsz > tosz) {
rval = new llvm::FPTruncInst(DtoRVal(val), tolltype, "", gIR->scopebb());
} else {
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
to->toChars());
fatal();
}
} else if (totype->isintegral()) {
if (totype->isunsigned()) {
rval = new llvm::FPToUIInst(DtoRVal(val), tolltype, "", gIR->scopebb());
} else {
rval = new llvm::FPToSIInst(DtoRVal(val), tolltype, "", gIR->scopebb());
}
} else {
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
to->toChars());
fatal();
}
return new DImValue(to, rval);
}
DValue *DtoCastDelegate(const Loc &loc, DValue *val, Type *to) {
if (to->toBasetype()->ty == Tdelegate) {
return DtoPaintType(loc, val, to);
}
if (to->toBasetype()->ty == Tbool) {
return new DImValue(to,
DtoDelegateEquals(TOKnotequal, DtoRVal(val), nullptr));
}
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
to->toChars());
fatal();
}
DValue *DtoCastVector(const Loc &loc, DValue *val, Type *to) {
assert(val->type->toBasetype()->ty == Tvector);
Type *totype = to->toBasetype();
LLType *tolltype = DtoType(to);
if (totype->ty == Tsarray) {
// Reinterpret-cast without copy if the source vector is in memory.
if (val->isLVal()) {
LLValue *vector = DtoLVal(val);
IF_LOG Logger::cout() << "src: " << *vector << " to type: " << *tolltype
<< " (casting address)\n";
return new DLValue(to, DtoBitCast(vector, getPtrToType(tolltype)));
}
LLValue *vector = DtoRVal(val);
IF_LOG Logger::cout() << "src: " << *vector << " to type: " << *tolltype
<< " (creating temporary)\n";
LLValue *array = DtoAllocaDump(vector, tolltype, DtoAlignment(val->type));
return new DLValue(to, array);
}
if (totype->ty == Tvector && to->size() == val->type->size()) {
return new DImValue(to, DtoBitCast(DtoRVal(val), tolltype));
}
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
to->toChars());
fatal();
}
DValue *DtoCastStruct(const Loc &loc, DValue *val, Type *to) {
Type *const totype = to->toBasetype();
if (totype->ty == Tstruct) {
// This a cast to repaint a struct to another type, which the language
// allows for identical layouts (opCast() and so on have been lowered
// earlier by the frontend).
llvm::Value *lval = DtoLVal(val);
llvm::Value *result = DtoBitCast(lval, DtoType(to)->getPointerTo(),
lval->getName() + ".repaint");
return new DLValue(to, result);
}
error(loc, "Internal Compiler Error: Invalid struct cast from `%s` to `%s`",
val->type->toChars(), to->toChars());
fatal();
}
DValue *DtoCast(const Loc &loc, DValue *val, Type *to) {
Type *fromtype = val->type->toBasetype();
Type *totype = to->toBasetype();
if (fromtype->ty == Taarray) {
if (totype->ty == Taarray) {
// reinterpret-cast keeping lvalue-ness, IR types will match up
if (val->isLVal())
return new DLValue(to, DtoLVal(val));
return new DImValue(to, DtoRVal(val));
}
// DMD allows casting AAs to void*, even if they are internally
// implemented as structs.
if (totype->ty == Tpointer) {
IF_LOG Logger::println("Casting AA to pointer.");
LLValue *rval = DtoBitCast(DtoRVal(val), DtoType(to));
return new DImValue(to, rval);
}
if (totype->ty == Tbool) {
IF_LOG Logger::println("Casting AA to bool.");
LLValue *rval = DtoRVal(val);
LLValue *zero = LLConstant::getNullValue(rval->getType());
return new DImValue(to, gIR->ir->CreateICmpNE(rval, zero));
}
}
if (fromtype->equals(totype)) {
return val;
}
IF_LOG Logger::println("Casting from '%s' to '%s'", fromtype->toChars(),
to->toChars());
LOG_SCOPE;
if (fromtype->ty == Tvector) {
// First, handle vector types (which can also be isintegral()).
return DtoCastVector(loc, val, to);
}
if (fromtype->isintegral()) {
return DtoCastInt(loc, val, to);
}
if (fromtype->iscomplex()) {
return DtoCastComplex(loc, val, to);
}
if (fromtype->isfloating()) {
return DtoCastFloat(loc, val, to);
}
switch (fromtype->ty) {
case Tclass:
return DtoCastClass(loc, val, to);
case Tarray:
case Tsarray:
return DtoCastArray(loc, val, to);
case Tpointer:
case Tfunction:
return DtoCastPtr(loc, val, to);
case Tdelegate:
return DtoCastDelegate(loc, val, to);
case Tstruct:
return DtoCastStruct(loc, val, to);
case Tnull:
case Tnoreturn:
return DtoNullValue(to, loc);
default:
error(loc, "invalid cast from `%s` to `%s`", val->type->toChars(),
to->toChars());
fatal();
}
}
////////////////////////////////////////////////////////////////////////////////
DValue *DtoPaintType(const Loc &loc, DValue *val, Type *to) {
Type *from = val->type->toBasetype();
IF_LOG Logger::println("repainting from '%s' to '%s'", from->toChars(),
to->toChars());
if (from->ty == Tarray) {
Type *at = to->toBasetype();
assert(at->ty == Tarray);
Type *elem = at->nextOf()->pointerTo();
if (DSliceValue *slice = val->isSlice()) {
return new DSliceValue(to, slice->getLength(),
DtoBitCast(slice->getPtr(), DtoType(elem)));
}
if (val->isLVal()) {
LLValue *ptr = DtoLVal(val);
ptr = DtoBitCast(ptr, DtoType(at->pointerTo()));
return new DLValue(to, ptr);
}
LLValue *len, *ptr;
len = DtoArrayLen(val);
ptr = DtoArrayPtr(val);
ptr = DtoBitCast(ptr, DtoType(elem));
return new DImValue(to, DtoAggrPair(len, ptr));
}
if (from->ty == Tdelegate) {
Type *dgty = to->toBasetype();
assert(dgty->ty == Tdelegate);
if (val->isLVal()) {
LLValue *ptr = DtoLVal(val);
assert(isaPointer(ptr));
ptr = DtoBitCast(ptr, DtoPtrToType(dgty));
IF_LOG Logger::cout() << "dg ptr: " << *ptr << '\n';
return new DLValue(to, ptr);
}
LLValue *dg = DtoRVal(val);
LLValue *context = gIR->ir->CreateExtractValue(dg, 0, ".context");
LLValue *funcptr = gIR->ir->CreateExtractValue(dg, 1, ".funcptr");
funcptr = DtoBitCast(funcptr, DtoType(dgty)->getContainedType(1));
LLValue *aggr = DtoAggrPair(context, funcptr);
IF_LOG Logger::cout() << "dg: " << *aggr << '\n';
return new DImValue(to, aggr);
}
if (from->ty == Tpointer || from->ty == Tclass || from->ty == Taarray) {
Type *b = to->toBasetype();
assert(b->ty == Tpointer || b->ty == Tclass || b->ty == Taarray);
LLValue *ptr = DtoBitCast(DtoRVal(val), DtoType(b));
return new DImValue(to, ptr);
}
if (from->ty == Tsarray) {
assert(to->toBasetype()->ty == Tsarray);
LLValue *ptr = DtoBitCast(DtoLVal(val), DtoPtrToType(to));
return new DLValue(to, ptr);
}
assert(DtoType(from) == DtoType(to));
return new DImValue(to, DtoRVal(val));
}
/******************************************************************************
* TEMPLATE HELPERS
******************************************************************************/
bool defineOnDeclare(Dsymbol* s) {
return global.params.linkonceTemplates && s->isInstantiated();
}
/******************************************************************************
* PROCESSING QUEUE HELPERS
******************************************************************************/
void DtoResolveDsymbol(Dsymbol *dsym) {
if (StructDeclaration *sd = dsym->isStructDeclaration()) {
DtoResolveStruct(sd);
} else if (ClassDeclaration *cd = dsym->isClassDeclaration()) {
DtoResolveClass(cd);
} else if (FuncDeclaration *fd = dsym->isFuncDeclaration()) {
DtoResolveFunction(fd);
} else if (TypeInfoDeclaration *tid = dsym->isTypeInfoDeclaration()) {
DtoResolveTypeInfo(tid);
} else if (VarDeclaration *vd = dsym->isVarDeclaration()) {
DtoResolveVariable(vd);
}
}
void DtoResolveVariable(VarDeclaration *vd) {
if (auto tid = vd->isTypeInfoDeclaration()) {
DtoResolveTypeInfo(tid);
return;
}
IF_LOG Logger::println("DtoResolveVariable(%s)", vd->toPrettyChars());
LOG_SCOPE;
// just forward aliases
// TODO: Is this required here or is the check in VarDeclaration::codegen
// sufficient?
if (vd->aliassym) {
Logger::println("alias sym");
DtoResolveDsymbol(vd->aliassym);
return;
}
if (AggregateDeclaration *ad = vd->isMember()) {
DtoResolveDsymbol(ad);
}
// global variable
if (vd->isDataseg()) {
Logger::println("data segment");
assert(!(vd->storage_class & STCmanifest) &&
"manifest constant being codegen'd!");
// don't duplicate work
if (vd->ir->isResolved()) {
return;
}
vd->ir->setDeclared();
auto irGlobal = getIrGlobal(vd, true);
irGlobal->getValue();
}
}
/******************************************************************************
* DECLARATION EXP HELPER
******************************************************************************/
// TODO: Merge with DtoRawVarDeclaration!
void DtoVarDeclaration(VarDeclaration *vd) {
assert(!vd->isDataseg() &&
"Statics/globals are handled in DtoDeclarationExp.");
assert(!vd->aliassym && "Aliases are handled in DtoDeclarationExp.");
IF_LOG Logger::println("DtoVarDeclaration(vdtype = %s)", vd->type->toChars());
LOG_SCOPE
if (vd->nestedrefs.length) {
IF_LOG Logger::println(
"has nestedref set (referenced by nested function/delegate)");
// A variable may not be really nested even if nextedrefs is not empty
// in case it is referenced by a function inside __traits(compile) or
// typeof.
// assert(vd->ir->irLocal && "irLocal is expected to be already set by
// DtoCreateNestedContext");
}
if (isIrLocalCreated(vd)) {
// Nothing to do if it has already been allocated.
} else if (gIR->func()->sretArg &&
((gIR->func()->decl->nrvo_can &&
gIR->func()->decl->nrvo_var == vd) ||
(vd->isResult() && !isSpecialRefVar(vd)))) {
// Named Return Value Optimization (NRVO):
// T f() {
// T ret; // &ret == hidden pointer
// ret = ...
// return ret; // NRVO.
// }
assert(!isSpecialRefVar(vd) && "Can this happen?");
getIrLocal(vd, true)->value = gIR->func()->sretArg;
gIR->DBuilder.EmitLocalVariable(gIR->func()->sretArg, vd);
} else {
// normal stack variable, allocate storage on the stack if it has not
// already been done
IrLocal *irLocal = getIrLocal(vd, true);
Type *type = isSpecialRefVar(vd) ? vd->type->pointerTo() : vd->type;
llvm::Value *allocainst;
LLType *lltype = DtoType(type);
if (gDataLayout->getTypeSizeInBits(lltype) == 0) {
allocainst = llvm::ConstantPointerNull::get(getPtrToType(lltype));
} else if (type != vd->type) {
allocainst = DtoAlloca(type, vd->toChars());
} else {
allocainst = DtoAlloca(vd, vd->toChars());
}
irLocal->value = allocainst;
gIR->DBuilder.EmitLocalVariable(allocainst, vd);
}
IF_LOG Logger::cout() << "llvm value for decl: " << *getIrLocal(vd)->value
<< '\n';
if (vd->_init) {
if (ExpInitializer *ex = vd->_init->isExpInitializer()) {
// TODO: Refactor this so that it doesn't look like toElem has no effect.
Logger::println("expression initializer");
toElem(ex->exp);
}
}
}
DValue *DtoDeclarationExp(Dsymbol *declaration) {
IF_LOG Logger::print("DtoDeclarationExp: %s\n", declaration->toChars());
LOG_SCOPE;
if (VarDeclaration *vd = declaration->isVarDeclaration()) {
Logger::println("VarDeclaration");
// if aliassym is set, this VarDecl is redone as an alias to another symbol
// this seems to be done to rewrite Tuple!(...) v;
// as a TupleDecl that contains a bunch of individual VarDecls
if (vd->aliassym) {
return DtoDeclarationExp(vd->aliassym);
}
if (vd->storage_class & STCmanifest) {
IF_LOG Logger::println("Manifest constant, nothing to do.");
return nullptr;
}
// static
if (vd->isDataseg()) {
Declaration_codegen(vd);
} else {
DtoVarDeclaration(vd);
}
return makeVarDValue(vd->type, vd);
}
if (StructDeclaration *s = declaration->isStructDeclaration()) {
Logger::println("StructDeclaration");
Declaration_codegen(s);
} else if (FuncDeclaration *f = declaration->isFuncDeclaration()) {
Logger::println("FuncDeclaration");
Declaration_codegen(f);
} else if (ClassDeclaration *e = declaration->isClassDeclaration()) {
Logger::println("ClassDeclaration");
Declaration_codegen(e);
} else if (AttribDeclaration *a = declaration->isAttribDeclaration()) {
Logger::println("AttribDeclaration");
// choose the right set in case this is a conditional declaration
if (auto d = a->include(nullptr)) {
for (unsigned i = 0; i < d->length; ++i) {
DtoDeclarationExp((*d)[i]);
}
}
} else if (TemplateMixin *m = declaration->isTemplateMixin()) {
Logger::println("TemplateMixin");
for (Dsymbol *mdsym : *m->members) {
DtoDeclarationExp(mdsym);
}
} else if (TupleDeclaration *tupled = declaration->isTupleDeclaration()) {
Logger::println("TupleDeclaration");
assert(tupled->isexp && "Non-expression tuple decls not handled yet.");
assert(tupled->objects);
for (unsigned i = 0; i < tupled->objects->length; ++i) {
auto exp = static_cast<DsymbolExp *>((*tupled->objects)[i]);
DtoDeclarationExp(exp->s);
}
} else {
// Do nothing for template/alias/enum declarations and static
// assertions. We cannot detect StaticAssert without RTTI, so don't
// even bother to check.
IF_LOG Logger::println("Ignoring Symbol: %s", declaration->kind());
}