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ff36be2c01
Instead, error out whenever requested by an expression-less `synchronized` statement, including source LoC to track it down. This is safer, especially since the previous initial warning may likely be suppressed, and makes this host-agnostic. Also suppress previous warnings about unknown `` and `none` OS, treating these like `unknown`.
277 lines
8.6 KiB
C++
277 lines
8.6 KiB
C++
//===-- target.cpp -------------------------------------------------------===//
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//
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// LDC – the LLVM D compiler
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//
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// This file is distributed under the BSD-style LDC license. See the LICENSE
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// file for details.
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//
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// Implements some parts of the front-end Target class (dmd/target.{d,h}).
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//
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//===----------------------------------------------------------------------===//
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#include "dmd/errors.h"
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#include "dmd/ldcbindings.h"
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#include "dmd/mtype.h"
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#include "dmd/target.h"
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#include "driver/cl_options.h"
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#include "driver/linker.h"
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#include "gen/abi.h"
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#include "gen/irstate.h"
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#include "gen/llvmhelpers.h"
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#include <assert.h>
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using llvm::APFloat;
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// in dmd/argtypes.d:
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TypeTuple *toArgTypes(Type *t);
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// in dmd/argtypes_sysv_x64.d:
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TypeTuple *toArgTypes_sysv_x64(Type *t);
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namespace {
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/******************************
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* Return size of alias Mutex in druntime/src/rt/monitor_.d, or, more precisely,
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* the size of the native critical section as 2nd field in struct
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* D_CRITICAL_SECTION (after a pointer). D_CRITICAL_SECTION is pointer-size
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* aligned, so the returned field size is a multiple of pointer-size.
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*/
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unsigned getCriticalSectionSize(const Param ¶ms) {
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const bool is64bit = params.is64bit;
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// Windows: sizeof(CRITICAL_SECTION)
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if (params.isWindows)
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return is64bit ? 40 : 24;
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// POSIX: sizeof(pthread_mutex_t)
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// based on druntime/src/core/sys/posix/sys/types.d
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const auto &triple = *params.targetTriple;
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if (triple.isOSDarwin())
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return is64bit ? 64 : 44;
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const auto arch = triple.getArch();
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switch (triple.getOS()) {
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case llvm::Triple::Linux:
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if (triple.getEnvironment() == llvm::Triple::Android) {
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// 32-bit integer rounded up to pointer size
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return gDataLayout->getPointerSize();
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}
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if (arch == llvm::Triple::aarch64 || arch == llvm::Triple::aarch64_be)
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return 48;
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return is64bit ? 40 : 24;
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case llvm::Triple::NetBSD:
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return is64bit ? 48 : 28;
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case llvm::Triple::FreeBSD:
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case llvm::Triple::OpenBSD:
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case llvm::Triple::DragonFly:
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return gDataLayout->getPointerSize();
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case llvm::Triple::Solaris:
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return 24;
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default:
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return 0; // leads to an error whenever requested
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}
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}
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} // anonymous namespace
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void Target::_init(const Param ¶ms) {
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CTFloat::initialize();
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FloatProperties.initialize();
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DoubleProperties.initialize();
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RealProperties.initialize();
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const auto &triple = *params.targetTriple;
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const bool isMSVC = triple.isWindowsMSVCEnvironment();
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llvm::Type *const real = DtoType(Type::basic[Tfloat80]);
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ptrsize = gDataLayout->getPointerSize();
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realsize = gDataLayout->getTypeAllocSize(real);
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realpad = realsize - gDataLayout->getTypeStoreSize(real);
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realalignsize = gDataLayout->getABITypeAlignment(real);
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classinfosize = 0; // unused
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maxStaticDataSize = std::numeric_limits<unsigned long long>::max();
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c.longsize = params.is64bit && !isMSVC ? 8 : 4;
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c.long_doublesize = realsize;
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c.criticalSectionSize = getCriticalSectionSize(params);
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cpp.reverseOverloads = isMSVC; // according to DMD, only for MSVC++
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cpp.exceptions = true;
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cpp.twoDtorInVtable = !isMSVC;
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objc.supported = params.hasObjectiveC;
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// Finalize RealProperties for the target's `real` type.
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const auto targetRealSemantics = &real->getFltSemantics();
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#if LDC_LLVM_VER >= 400
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const auto IEEEdouble = &APFloat::IEEEdouble();
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const auto x87DoubleExtended = &APFloat::x87DoubleExtended();
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const auto IEEEquad = &APFloat::IEEEquad();
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#else
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const auto IEEEdouble = &APFloat::IEEEdouble;
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const auto x87DoubleExtended = &APFloat::x87DoubleExtended;
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const auto IEEEquad = &APFloat::IEEEquad;
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#endif
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RealProperties.nan = CTFloat::nan;
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RealProperties.infinity = CTFloat::infinity;
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if (targetRealSemantics == IEEEdouble) {
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RealProperties.max = CTFloat::parse("0x1.fffffffffffffp+1023");
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RealProperties.min_normal = CTFloat::parse("0x1p-1022");
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RealProperties.epsilon = CTFloat::parse("0x1p-52");
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RealProperties.dig = 15;
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RealProperties.mant_dig = 53;
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RealProperties.max_exp = 1024;
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RealProperties.min_exp = -1021;
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RealProperties.max_10_exp = 308;
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RealProperties.min_10_exp = -307;
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} else if (targetRealSemantics == x87DoubleExtended) {
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RealProperties.max = CTFloat::parse("0x1.fffffffffffffffep+16383");
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RealProperties.min_normal = CTFloat::parse("0x1p-16382");
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RealProperties.epsilon = CTFloat::parse("0x1p-63");
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RealProperties.dig = 18;
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RealProperties.mant_dig = 64;
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RealProperties.max_exp = 16384;
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RealProperties.min_exp = -16381;
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RealProperties.max_10_exp = 4932;
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RealProperties.min_10_exp = -4931;
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} else if (targetRealSemantics == IEEEquad) {
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// FIXME: hex constants
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RealProperties.max =
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CTFloat::parse("1.18973149535723176508575932662800702e+4932");
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RealProperties.min_normal =
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CTFloat::parse("3.36210314311209350626267781732175260e-4932");
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RealProperties.epsilon =
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CTFloat::parse("1.92592994438723585305597794258492732e-34");
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RealProperties.dig = 33;
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RealProperties.mant_dig = 113;
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RealProperties.max_exp = 16384;
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RealProperties.min_exp = -16381;
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RealProperties.max_10_exp = 4932;
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RealProperties.min_10_exp = -4931;
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} else {
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// leave initialized with host real_t values
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warning(Loc(), "unknown properties for target `real` type, relying on D "
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"host compiler");
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}
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}
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/******************************
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* Return memory alignment size of type.
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*/
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unsigned Target::alignsize(Type *type) {
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assert(type->isTypeBasic());
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if (type->ty == Tvoid) {
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return 1;
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}
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return gDataLayout->getABITypeAlignment(DtoType(type));
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}
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/******************************
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* Return field alignment size of type.
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*/
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unsigned Target::fieldalign(Type *type) { return DtoAlignment(type); }
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Type *Target::va_listType() { return gABI->vaListType(); }
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/**
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* Gets vendor-specific type mangling for C++ ABI.
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* Params:
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* t = type to inspect
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* Returns:
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* string if type is mangled specially on target
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* null if unhandled
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*/
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const char *TargetCPP::typeMangle(Type *t) {
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if (t->ty == Tfloat80) {
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const auto &triple = *global.params.targetTriple;
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// `long double` on Android/x64 is __float128 and mangled as `g`
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bool isAndroidX64 = triple.getEnvironment() == llvm::Triple::Android &&
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triple.getArch() == llvm::Triple::x86_64;
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return isAndroidX64 ? "g" : "e";
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}
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return nullptr;
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}
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TypeTuple *Target::toArgTypes(Type *t) {
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const auto &triple = *global.params.targetTriple;
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if (triple.getArch() == llvm::Triple::x86)
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return ::toArgTypes(t);
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if (triple.getArch() == llvm::Triple::x86_64 && !triple.isOSWindows())
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return toArgTypes_sysv_x64(t);
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return nullptr;
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}
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bool Target::isReturnOnStack(TypeFunction *tf, bool needsThis) {
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return gABI->returnInArg(tf, needsThis);
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}
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Expression *Target::getTargetInfo(const char *name_, const Loc &loc) {
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const llvm::StringRef name(name_);
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const auto &triple = *global.params.targetTriple;
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const auto createStringExp = [&loc](const char *value) {
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return value ? StringExp::create(loc, const_cast<char *>(value)) : nullptr;
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};
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if (name == "objectFormat") {
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const char *objectFormat = nullptr;
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if (triple.isOSBinFormatCOFF()) {
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objectFormat = "coff";
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} else if (triple.isOSBinFormatMachO()) {
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objectFormat = "macho";
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} else if (triple.isOSBinFormatELF()) {
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objectFormat = "elf";
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#if LDC_LLVM_VER >= 500
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} else if (triple.isOSBinFormatWasm()) {
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objectFormat = "wasm";
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#endif
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}
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return createStringExp(objectFormat);
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}
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if (name == "floatAbi") {
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const char *floatAbi = nullptr;
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if (opts::floatABI == FloatABI::Hard) {
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floatAbi = "hard";
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} else if (opts::floatABI == FloatABI::Soft) {
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floatAbi = "soft";
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} else if (opts::floatABI == FloatABI::SoftFP) {
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floatAbi = "softfp";
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}
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return createStringExp(floatAbi);
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}
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if (name == "cppRuntimeLibrary") {
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const char *cppRuntimeLibrary = "";
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if (triple.isWindowsMSVCEnvironment()) {
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cppRuntimeLibrary = mem.xstrdup(getMscrtLibName().str().c_str());
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}
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return createStringExp(cppRuntimeLibrary);
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}
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if (name == "cppStd")
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return createIntegerExp(static_cast<unsigned>(global.params.cplusplus));
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#if LDC_LLVM_SUPPORTED_TARGET_SPIRV || LDC_LLVM_SUPPORTED_TARGET_NVPTX
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if (name == "dcomputeTargets") {
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Expressions* exps = new Expressions();
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for (auto &targ : opts::dcomputeTargets) {
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exps->push(createStringExp(mem.xstrdup(targ.c_str())));
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}
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return TupleExp::create(loc, exps);
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}
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if (name == "dcomputeFilePrefix") {
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return createStringExp(
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mem.xstrdup(opts::dcomputeFilePrefix.c_str()));
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}
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#endif
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return nullptr;
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}
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