mirror of
https://github.com/ldc-developers/ldc.git
synced 2025-05-06 19:06:02 +03:00
288 lines
8.8 KiB
C++
288 lines
8.8 KiB
C++
//===-- target.cpp -------------------------------------------------------===//
|
||
//
|
||
// LDC – the LLVM D compiler
|
||
//
|
||
// This file is distributed under the BSD-style LDC license. See the LICENSE
|
||
// file for details.
|
||
//
|
||
// Implements some parts of the front-end Target class (dmd/target.{d,h}).
|
||
//
|
||
//===----------------------------------------------------------------------===//
|
||
|
||
#include "dmd/ldcbindings.h"
|
||
#include "dmd/mars.h"
|
||
#include "dmd/mtype.h"
|
||
#include "dmd/target.h"
|
||
#include "driver/cl_options.h"
|
||
#include "driver/linker.h"
|
||
#include "gen/abi.h"
|
||
#include "gen/irstate.h"
|
||
#include "gen/llvmhelpers.h"
|
||
#include <assert.h>
|
||
|
||
#if !defined(_MSC_VER)
|
||
#include <pthread.h>
|
||
#endif
|
||
|
||
using llvm::APFloat;
|
||
|
||
// in dmd/argtypes.d:
|
||
TypeTuple *toArgTypes(Type *t);
|
||
// in dmd/argtypes_sysv_x64.d:
|
||
TypeTuple *toArgTypes_sysv_x64(Type *t);
|
||
|
||
namespace {
|
||
/******************************
|
||
* Return size of alias Mutex in druntime/src/rt/monitor_.d, or, more precisely,
|
||
* the size of the native critical section as 2nd field in struct
|
||
* D_CRITICAL_SECTION (after a pointer). D_CRITICAL_SECTION is pointer-size
|
||
* aligned, so the returned field size is a multiple of pointer-size.
|
||
*/
|
||
unsigned getCriticalSectionSize(const Param ¶ms) {
|
||
const bool is64bit = params.is64bit;
|
||
|
||
// Windows: sizeof(CRITICAL_SECTION)
|
||
if (params.isWindows)
|
||
return is64bit ? 40 : 24;
|
||
|
||
// POSIX: sizeof(pthread_mutex_t)
|
||
// based on druntime/src/core/sys/posix/sys/types.d
|
||
const auto &triple = *params.targetTriple;
|
||
const auto arch = triple.getArch();
|
||
switch (triple.getOS()) {
|
||
case llvm::Triple::Linux:
|
||
if (triple.getEnvironment() == llvm::Triple::Android) {
|
||
// 32-bit integer rounded up to pointer size
|
||
return gDataLayout->getPointerSize();
|
||
}
|
||
if (arch == llvm::Triple::aarch64 || arch == llvm::Triple::aarch64_be)
|
||
return 48;
|
||
return is64bit ? 40 : 24;
|
||
|
||
case llvm::Triple::Darwin:
|
||
case llvm::Triple::MacOSX:
|
||
return is64bit ? 64 : 44;
|
||
|
||
case llvm::Triple::NetBSD:
|
||
return is64bit ? 48 : 28;
|
||
|
||
case llvm::Triple::FreeBSD:
|
||
case llvm::Triple::OpenBSD:
|
||
case llvm::Triple::DragonFly:
|
||
return gDataLayout->getPointerSize();
|
||
|
||
case llvm::Triple::Solaris:
|
||
return 24;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
#ifndef _MSC_VER
|
||
unsigned hostSize = sizeof(pthread_mutex_t);
|
||
warning(Loc(), "Assuming critical section size = %u bytes", hostSize);
|
||
return hostSize;
|
||
#else
|
||
return 0;
|
||
#endif
|
||
}
|
||
} // anonymous namespace
|
||
|
||
void Target::_init(const Param ¶ms) {
|
||
CTFloat::initialize();
|
||
|
||
FloatProperties._init();
|
||
DoubleProperties._init();
|
||
RealProperties._init();
|
||
|
||
const auto &triple = *params.targetTriple;
|
||
const bool isMSVC = triple.isWindowsMSVCEnvironment();
|
||
llvm::Type *const real = DtoType(Type::basic[Tfloat80]);
|
||
|
||
ptrsize = gDataLayout->getPointerSize();
|
||
realsize = gDataLayout->getTypeAllocSize(real);
|
||
realpad = realsize - gDataLayout->getTypeStoreSize(real);
|
||
realalignsize = gDataLayout->getABITypeAlignment(real);
|
||
classinfosize = 0; // unused
|
||
maxStaticDataSize = std::numeric_limits<unsigned long long>::max();
|
||
|
||
c_longsize = global.params.is64bit && !isMSVC ? 8 : 4;
|
||
c_long_doublesize = realsize;
|
||
criticalSectionSize = getCriticalSectionSize(params);
|
||
|
||
reverseCppOverloads = isMSVC; // according to DMD, only for MSVC++
|
||
cppExceptions = true;
|
||
twoDtorInVtable = !isMSVC;
|
||
|
||
// Finalize RealProperties for the target's `real` type.
|
||
|
||
const auto targetRealSemantics = &real->getFltSemantics();
|
||
#if LDC_LLVM_VER >= 400
|
||
const auto IEEEdouble = &APFloat::IEEEdouble();
|
||
const auto x87DoubleExtended = &APFloat::x87DoubleExtended();
|
||
const auto IEEEquad = &APFloat::IEEEquad();
|
||
#else
|
||
const auto IEEEdouble = &APFloat::IEEEdouble;
|
||
const auto x87DoubleExtended = &APFloat::x87DoubleExtended;
|
||
const auto IEEEquad = &APFloat::IEEEquad;
|
||
#endif
|
||
|
||
RealProperties.nan = CTFloat::nan;
|
||
RealProperties.snan = CTFloat::initVal;
|
||
RealProperties.infinity = CTFloat::infinity;
|
||
|
||
if (targetRealSemantics == IEEEdouble) {
|
||
RealProperties.max = CTFloat::parse("0x1.fffffffffffffp+1023");
|
||
RealProperties.min_normal = CTFloat::parse("0x1p-1022");
|
||
RealProperties.epsilon = CTFloat::parse("0x1p-52");
|
||
RealProperties.dig = 15;
|
||
RealProperties.mant_dig = 53;
|
||
RealProperties.max_exp = 1024;
|
||
RealProperties.min_exp = -1021;
|
||
RealProperties.max_10_exp = 308;
|
||
RealProperties.min_10_exp = -307;
|
||
} else if (targetRealSemantics == x87DoubleExtended) {
|
||
RealProperties.max = CTFloat::parse("0x1.fffffffffffffffep+16383");
|
||
RealProperties.min_normal = CTFloat::parse("0x1p-16382");
|
||
RealProperties.epsilon = CTFloat::parse("0x1p-63");
|
||
RealProperties.dig = 18;
|
||
RealProperties.mant_dig = 64;
|
||
RealProperties.max_exp = 16384;
|
||
RealProperties.min_exp = -16381;
|
||
RealProperties.max_10_exp = 4932;
|
||
RealProperties.min_10_exp = -4931;
|
||
} else if (targetRealSemantics == IEEEquad) {
|
||
// FIXME: hex constants
|
||
RealProperties.max =
|
||
CTFloat::parse("1.18973149535723176508575932662800702e+4932");
|
||
RealProperties.min_normal =
|
||
CTFloat::parse("3.36210314311209350626267781732175260e-4932");
|
||
RealProperties.epsilon =
|
||
CTFloat::parse("1.92592994438723585305597794258492732e-34");
|
||
RealProperties.dig = 33;
|
||
RealProperties.mant_dig = 113;
|
||
RealProperties.max_exp = 16384;
|
||
RealProperties.min_exp = -16381;
|
||
RealProperties.max_10_exp = 4932;
|
||
RealProperties.min_10_exp = -4931;
|
||
} else {
|
||
// leave initialized with host real_t values
|
||
warning(Loc(), "unknown properties for target `real` type, relying on D "
|
||
"host compiler");
|
||
}
|
||
}
|
||
|
||
/******************************
|
||
* Return memory alignment size of type.
|
||
*/
|
||
unsigned Target::alignsize(Type *type) {
|
||
assert(type->isTypeBasic());
|
||
if (type->ty == Tvoid) {
|
||
return 1;
|
||
}
|
||
return gDataLayout->getABITypeAlignment(DtoType(type));
|
||
}
|
||
|
||
/******************************
|
||
* Return field alignment size of type.
|
||
*/
|
||
unsigned Target::fieldalign(Type *type) { return DtoAlignment(type); }
|
||
|
||
Type *Target::va_listType() { return gABI->vaListType(); }
|
||
|
||
/**
|
||
* Gets vendor-specific type mangling for C++ ABI.
|
||
* Params:
|
||
* t = type to inspect
|
||
* Returns:
|
||
* string if type is mangled specially on target
|
||
* null if unhandled
|
||
*/
|
||
const char *Target::cppTypeMangle(Type *t) {
|
||
if (t->ty == Tfloat80) {
|
||
const auto &triple = *global.params.targetTriple;
|
||
// `long double` on Android/x64 is __float128 and mangled as `g`
|
||
bool isAndroidX64 = triple.getEnvironment() == llvm::Triple::Android &&
|
||
triple.getArch() == llvm::Triple::x86_64;
|
||
return isAndroidX64 ? "g" : "e";
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
TypeTuple *Target::toArgTypes(Type *t) {
|
||
const auto &triple = *global.params.targetTriple;
|
||
if (triple.getArch() == llvm::Triple::x86)
|
||
return ::toArgTypes(t);
|
||
if (triple.getArch() == llvm::Triple::x86_64 && !triple.isOSWindows())
|
||
return toArgTypes_sysv_x64(t);
|
||
return nullptr;
|
||
}
|
||
|
||
bool Target::isReturnOnStack(TypeFunction *tf, bool needsThis) {
|
||
return gABI->returnInArg(tf, needsThis);
|
||
}
|
||
|
||
Expression *Target::getTargetInfo(const char *name_, const Loc &loc) {
|
||
const llvm::StringRef name(name_);
|
||
const auto &triple = *global.params.targetTriple;
|
||
|
||
const auto createStringExp = [&loc](const char *value) {
|
||
return value ? StringExp::create(loc, const_cast<char *>(value)) : nullptr;
|
||
};
|
||
|
||
if (name == "objectFormat") {
|
||
const char *objectFormat = nullptr;
|
||
if (triple.isOSBinFormatCOFF()) {
|
||
objectFormat = "coff";
|
||
} else if (triple.isOSBinFormatMachO()) {
|
||
objectFormat = "macho";
|
||
} else if (triple.isOSBinFormatELF()) {
|
||
objectFormat = "elf";
|
||
#if LDC_LLVM_VER >= 500
|
||
} else if (triple.isOSBinFormatWasm()) {
|
||
objectFormat = "wasm";
|
||
#endif
|
||
}
|
||
return createStringExp(objectFormat);
|
||
}
|
||
|
||
if (name == "floatAbi") {
|
||
const char *floatAbi = nullptr;
|
||
if (opts::floatABI == FloatABI::Hard) {
|
||
floatAbi = "hard";
|
||
} else if (opts::floatABI == FloatABI::Soft) {
|
||
floatAbi = "soft";
|
||
} else if (opts::floatABI == FloatABI::SoftFP) {
|
||
floatAbi = "softfp";
|
||
}
|
||
return createStringExp(floatAbi);
|
||
}
|
||
|
||
if (name == "cppRuntimeLibrary") {
|
||
const char *cppRuntimeLibrary = "";
|
||
if (triple.isWindowsMSVCEnvironment()) {
|
||
cppRuntimeLibrary = mem.xstrdup(getMscrtLibName().str().c_str());
|
||
}
|
||
return createStringExp(cppRuntimeLibrary);
|
||
}
|
||
|
||
if (name == "cppStd")
|
||
return createIntegerExp(static_cast<unsigned>(global.params.cplusplus));
|
||
|
||
#if LDC_LLVM_SUPPORTED_TARGET_SPIRV || LDC_LLVM_SUPPORTED_TARGET_NVPTX
|
||
if (name == "dcomputeTargets") {
|
||
Expressions* exps = new Expressions();
|
||
for (auto &targ : opts::dcomputeTargets) {
|
||
exps->push(createStringExp(mem.xstrdup(targ.c_str())));
|
||
}
|
||
return TupleExp::create(loc, exps);
|
||
}
|
||
|
||
if (name == "dcomputeFilePrefix") {
|
||
return createStringExp(
|
||
mem.xstrdup(opts::dcomputeFilePrefix.c_str()));
|
||
}
|
||
#endif
|
||
|
||
return nullptr;
|
||
}
|