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target.cpp
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target.cpp
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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* trans/target.cpp
* - Target-specific information
*/
#include "target.hpp"
#include <algorithm>
#include "../expand/cfg.hpp"
#include <fstream>
#include <map>
#include <hir/hir.hpp>
#include <hir_typeck/helpers.hpp>
#include <hir_conv/main_bindings.hpp> // ConvertHIR_ConstantEvaluate_Enum
#include <climits> // UINT_MAX
#include <toml.h> // tools/common
const TargetArch ARCH_X86_64 = {
"x86_64",
64, false,
TargetArch::Atomics(/*atomic(u8)=*/true, /*atomic(u16)=*/true, /*atomic(u32)=*/true, true, true),
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
//TargetArch::Alignments(2, 4, 8, 8, 4, 8, 8) // TODO: Alignment of u128 is 8 with rustc, but gcc uses 16
};
const TargetArch ARCH_X32 = {
"x86_64",
32, false,
ARCH_X86_64.m_atomics,
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 4) // x86_64 w/4-byte ptr
};
const TargetArch ARCH_X86 = {
"x86",
32, false,
{ /*atomic(u8)=*/true, false, true, false, true },
TargetArch::Alignments(2, 4, /*u64*/4, /*u128*/4, 4, 4, /*ptr*/4) // u128 has the same alignment as u64, which is u32's alignment. And f64 is 4 byte aligned
};
const TargetArch ARCH_ARM64 = {
"aarch64",
64, false,
{ /*atomic(u8)=*/true, true, true, true, true },
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
};
const TargetArch ARCH_ARM32 = {
"arm",
32, false,
{ /*atomic(u8)=*/true, false, true, false, true },
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 4) // Note, all types are natively aligned (but i128 will be emulated)
};
const TargetArch ARCH_M68K = {
"m68k",
32, true,
{ /*atomic(u8)=*/true, false, true, false, true },
TargetArch::Alignments(2, 2, 2, 2, 2, 2, 2)
};
const TargetArch ARCH_POWERPC64 = {
"powerpc64",
64, true,
{ /*atomic(u8)=*/true, true, true, true, true },
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
};
const TargetArch ARCH_POWERPC64LE = {
"powerpc64",
64, false,
{ /*atomic(u8)=*/true, true, true, true, true },
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
};
const TargetArch ARCH_RISCV64 = {
"riscv64",
64, false,
{ /*atomic(u8)=*/true, true, true, true, true },
TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
};
TargetSpec g_target;
bool Target_GetSizeAndAlignOf(const Span& sp, const StaticTraitResolve& resolve, const ::HIR::TypeRef& ty, size_t& out_size, size_t& out_align);
namespace
{
TargetSpec load_spec_from_file(const ::std::string& filename)
{
TargetSpec rv;
TomlFile toml_file(filename);
for(auto key_val : toml_file)
{
// Assertion: The way toml works, there has to be at least two entries in every path.
assert(key_val.path.size() > 1);
DEBUG(key_val.path << " = " << key_val.value);
auto check_path_length = [&](const TomlKeyValue& kv, unsigned len) {
if( kv.path.size() != len ) {
if( kv.path.size() > len ) {
::std::cerr << "ERROR: Unexpected sub-node to " << kv.path << " in " << filename << ::std::endl;
}
else {
::std::cerr << "ERROR: Expected sub-nodes in " << kv.path << " in " << filename << ::std::endl;
}
exit(1);
}
};
auto check_path_length_min = [&](const TomlKeyValue& kv, unsigned len) {
if( kv.path.size() < len ) {
::std::cerr << "ERROR: Expected sub-nodes in " << kv.path << " in " << filename << ::std::endl;
}
};
try
{
if( key_val.path[0] == "target" )
{
check_path_length_min(key_val, 2);
if( key_val.path[1] == "family" )
{
check_path_length(key_val, 2);
rv.m_family = key_val.value.as_string();
}
else if( key_val.path[1] == "os-name" )
{
check_path_length(key_val, 2);
rv.m_os_name = key_val.value.as_string();
}
else if( key_val.path[1] == "env-name" )
{
check_path_length(key_val, 2);
rv.m_env_name = key_val.value.as_string();
}
else if( key_val.path[1] == "arch" )
{
check_path_length(key_val, 2);
if( key_val.value.as_string() == ARCH_ARM32.m_name )
{
rv.m_arch = ARCH_ARM32;
}
else if( key_val.value.as_string() == ARCH_ARM64.m_name )
{
rv.m_arch = ARCH_ARM64;
}
else if( key_val.value.as_string() == ARCH_X86.m_name )
{
rv.m_arch = ARCH_X86;
}
else if( key_val.value.as_string() == ARCH_X86_64.m_name )
{
rv.m_arch = ARCH_X86_64;
}
else if( key_val.value.as_string() == ARCH_M68K.m_name )
{
rv.m_arch = ARCH_M68K;
}
else
{
// Error.
::std::cerr << "ERROR: Unknown architecture name '" << key_val.value.as_string() << "' in " << filename << ::std::endl;
exit(1);
}
}
else
{
// Warning
::std::cerr << "Warning: Unknown configuration item " << key_val.path[0] << "." << key_val.path[1] << " in " << filename << ::std::endl;
}
}
else if( key_val.path[0] == "backend" )
{
check_path_length_min(key_val, 2);
if( key_val.path[1] == "c" )
{
check_path_length_min(key_val, 3);
if( key_val.path[2] == "variant" )
{
check_path_length(key_val, 3);
if( key_val.value.as_string() == "msvc" )
{
rv.m_backend_c.m_codegen_mode = CodegenMode::Msvc;
}
else if( key_val.value.as_string() == "gnu" )
{
rv.m_backend_c.m_codegen_mode = CodegenMode::Gnu11;
}
else
{
::std::cerr << "ERROR: Unknown C variant name '" << key_val.value.as_string() << "' in " << filename << ::std::endl;
exit(1);
}
}
else if( key_val.path[2] == "target" )
{
check_path_length(key_val, 3);
rv.m_backend_c.m_c_compiler = key_val.value.as_string();
}
else if( key_val.path[2] == "emulate-i128" )
{
check_path_length(key_val, 3);
rv.m_backend_c.m_emulated_i128 = key_val.value.as_bool();
}
else if( key_val.path[2] == "compiler-opts" )
{
check_path_length(key_val, 3);
for(const auto& v : key_val.value.as_list())
{
rv.m_backend_c.m_compiler_opts.push_back( v.as_string() );
}
}
else if( key_val.path[2] == "linker-opts-pre" )
{
check_path_length(key_val, 3);
for(const auto& v : key_val.value.as_list())
{
rv.m_backend_c.m_linker_opts_pre.push_back( v.as_string() );
}
}
else if( key_val.path[2] == "linker-opts" || key_val.path[2] == "linker-opts-post" )
{
check_path_length(key_val, 3);
for(const auto& v : key_val.value.as_list())
{
rv.m_backend_c.m_linker_opts_post.push_back( v.as_string() );
}
}
else
{
::std::cerr << "WARNING: Unknown field backend.c." << key_val.path[2] << " in " << filename << ::std::endl;
}
}
// Does MMIR need configuration?
else
{
::std::cerr << "WARNING: Unknown configuration item backend." << key_val.path[1] << " in " << filename << ::std::endl;
}
}
else if( key_val.path[0] == "arch" )
{
check_path_length_min(key_val, 2);
if( key_val.path[1] == "name" )
{
check_path_length(key_val, 2);
if( rv.m_arch.m_name != "" ) {
::std::cerr << "ERROR: Architecture already specified to be '" << rv.m_arch.m_name << "'" << ::std::endl;
exit(1);
}
rv.m_arch.m_name = key_val.value.as_string();
}
else if( key_val.path[1] == "pointer-bits" )
{
check_path_length(key_val, 2);
rv.m_arch.m_pointer_bits = key_val.value.as_int();
}
else if( key_val.path[1] == "is-big-endian" )
{
check_path_length(key_val, 2);
rv.m_arch.m_big_endian = key_val.value.as_bool();
}
else if( key_val.path[1] == "has-atomic-u8" )
{
check_path_length(key_val, 2);
rv.m_arch.m_atomics.u8 = key_val.value.as_bool();
}
else if( key_val.path[1] == "has-atomic-u16" )
{
check_path_length(key_val, 2);
rv.m_arch.m_atomics.u16 = key_val.value.as_bool();
}
else if( key_val.path[1] == "has-atomic-u32" )
{
check_path_length(key_val, 2);
rv.m_arch.m_atomics.u32 = key_val.value.as_bool();
}
else if( key_val.path[1] == "has-atomic-u64" )
{
check_path_length(key_val, 2);
rv.m_arch.m_atomics.u64 = key_val.value.as_bool();
}
else if( key_val.path[1] == "has-atomic-ptr" )
{
check_path_length(key_val, 2);
rv.m_arch.m_atomics.ptr = key_val.value.as_bool();
}
else if( key_val.path[1] == "alignments" )
{
check_path_length(key_val, 3);
if( key_val.path[2] == "u16" )
{
rv.m_arch.m_alignments.u16 = key_val.value.as_int();
}
else if( key_val.path[2] == "u32" )
{
rv.m_arch.m_alignments.u32 = key_val.value.as_int();
}
else if( key_val.path[2] == "u64" )
{
rv.m_arch.m_alignments.u64 = key_val.value.as_int();
}
else if( key_val.path[2] == "u128" )
{
rv.m_arch.m_alignments.u128 = key_val.value.as_int();
}
else if( key_val.path[2] == "f32" )
{
rv.m_arch.m_alignments.f32 = key_val.value.as_int();
}
else if( key_val.path[2] == "f64" )
{
rv.m_arch.m_alignments.f64 = key_val.value.as_int();
}
else if( key_val.path[2] == "ptr" )
{
rv.m_arch.m_alignments.ptr = key_val.value.as_int();
}
else
{
::std::cerr << "WARNING: Unknown field arch.alignments." << key_val.path[1] << " in " << filename << ::std::endl;
}
}
else
{
::std::cerr << "WARNING: Unknown field arch." << key_val.path[1] << " in " << filename << ::std::endl;
}
}
else
{
::std::cerr << "WARNING: Unknown configuration item " << key_val.path[0] << " in " << filename << ::std::endl;
}
}
catch(const TomlValue::TypeError& e)
{
::std::cerr << "ERROR: Invalid type for " << key_val.path << " - " << e << ::std::endl;
exit(1);
}
}
// TODO: Ensure that everything is set
if( rv.m_arch.m_name == "" ) {
::std::cerr << "ERROR: Architecture not specified in " << filename << ::std::endl;
exit(1);
}
return rv;
}
void save_spec_to_file(const ::std::string& filename, const TargetSpec& spec)
{
// TODO: Have a round-trip unit test
::std::ofstream of(filename);
struct H
{
static const char* tfstr(bool v)
{
return v ? "true" : "false";
}
static const char* c_variant_name(const CodegenMode m)
{
switch(m)
{
case CodegenMode::Gnu11: return "gnu";
case CodegenMode::Msvc: return "msvc";
}
return "";
}
};
of
<< "[target]\n"
<< "family = \"" << spec.m_family << "\"\n"
<< "os-name = \"" << spec.m_os_name << "\"\n"
<< "env-name = \"" << spec.m_env_name << "\"\n"
//<< "arch = \"" << spec.m_arch.m_name << "\"\n"
<< "\n"
<< "[backend.c]\n"
<< "variant = \"" << H::c_variant_name(spec.m_backend_c.m_codegen_mode) << "\"\n"
<< "target = \"" << spec.m_backend_c.m_c_compiler << "\"\n"
<< "compiler-opts = ["; for(const auto& s : spec.m_backend_c.m_compiler_opts) of << "\"" << s << "\","; of << "]\n"
<< "linker-opts-pre = ["; for(const auto& s : spec.m_backend_c.m_linker_opts_pre) of << "\"" << s << "\","; of << "]\n"
<< "linker-opts-post = ["; for(const auto& s : spec.m_backend_c.m_linker_opts_post) of << "\"" << s << "\","; of << "]\n"
<< "\n"
<< "[arch]\n"
<< "name = \"" << spec.m_arch.m_name << "\"\n"
<< "pointer-bits = " << spec.m_arch.m_pointer_bits << "\n"
<< "is-big-endian = " << H::tfstr(spec.m_arch.m_big_endian) << "\n"
<< "has-atomic-u8 = " << H::tfstr(spec.m_arch.m_atomics.u8) << "\n"
<< "has-atomic-u16 = " << H::tfstr(spec.m_arch.m_atomics.u16) << "\n"
<< "has-atomic-u32 = " << H::tfstr(spec.m_arch.m_atomics.u32) << "\n"
<< "has-atomic-u64 = " << H::tfstr(spec.m_arch.m_atomics.u64) << "\n"
<< "has-atomic-ptr = " << H::tfstr(spec.m_arch.m_atomics.ptr) << "\n"
<< "alignments = {"
<< " u16 = " << static_cast<int>(spec.m_arch.m_alignments.u16 ) << ","
<< " u32 = " << static_cast<int>(spec.m_arch.m_alignments.u32 ) << ","
<< " u64 = " << static_cast<int>(spec.m_arch.m_alignments.u64 ) << ","
<< " u128 = " << static_cast<int>(spec.m_arch.m_alignments.u128) << ","
<< " f32 = " << static_cast<int>(spec.m_arch.m_alignments.f32 ) << ","
<< " f64 = " << static_cast<int>(spec.m_arch.m_alignments.f64 ) << ","
<< " ptr = " << static_cast<int>(spec.m_arch.m_alignments.ptr )
<< " }\n"
<< "\n"
;
}
TargetSpec init_from_spec_name(const ::std::string& target_name)
{
// Options for all the fully-GNU environments
#define BACKEND_C_OPTS_GNU {"-ffunction-sections", "-pthread"}, {"-Wl,--start-group"}, {"-Wl,--end-group", "-Wl,--gc-sections", "-l", "atomic"}
// If there's a '/' or a '\' in the filename, open it as a path, otherwise assume it's a triple.
if( target_name.find('/') != ::std::string::npos || target_name.find('\\') != ::std::string::npos )
{
return load_spec_from_file(target_name);
}
else if(target_name == "i586-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, true, "i586-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_X86
};
}
else if(target_name == "x86_64-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, true /*false*/, "x86_64-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_X86_64
};
}
else if(target_name == "x86_64-unknown-linux-gnux32")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, true, "x86_64-unknown-linux-gnux32", BACKEND_C_OPTS_GNU},
ARCH_X32
};
}
else if(target_name == "arm-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, true, "arm-elf-eabi", BACKEND_C_OPTS_GNU},
ARCH_ARM32
};
}
else if(target_name == "aarch64-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, false, "aarch64-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_ARM64
};
}
else if(target_name == "m68k-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, true, "m68k-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_M68K
};
}
else if(target_name == "powerpc64-unknown-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, false, "powerpc64-unknown-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_POWERPC64
};
}
else if(target_name == "powerpc64le-unknown-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, false, "powerpc64le-unknown-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_POWERPC64LE
};
}
else if(target_name == "riscv64-unknown-linux-gnu")
{
return TargetSpec {
"unix", "linux", "gnu", {CodegenMode::Gnu11, false, "riscv64-unknown-linux-gnu", BACKEND_C_OPTS_GNU},
ARCH_RISCV64
};
}
else if(target_name == "i586-pc-windows-gnu")
{
return TargetSpec {
"windows", "windows", "gnu", {CodegenMode::Gnu11, true, "mingw32", BACKEND_C_OPTS_GNU},
ARCH_X86
};
}
else if(target_name == "x86_64-pc-windows-gnu")
{
return TargetSpec {
"windows", "windows", "gnu", {CodegenMode::Gnu11, false, "x86_64-w64-mingw32", BACKEND_C_OPTS_GNU},
ARCH_X86_64
};
}
else if (target_name == "x86-pc-windows-msvc")
{
// TODO: Should this include the "kernel32.lib" inclusion?
return TargetSpec {
"windows", "windows", "msvc", {CodegenMode::Msvc, true, "x86", {}, {}},
ARCH_X86
};
}
else if (target_name == "x86_64-pc-windows-msvc")
{
return TargetSpec {
"windows", "windows", "msvc", {CodegenMode::Msvc, true, "amd64", {}, {}},
ARCH_X86_64
};
}
else if(target_name == "i686-unknown-freebsd")
{
return TargetSpec {
"unix", "freebsd", "gnu", {CodegenMode::Gnu11, true, "i686-unknown-freebsd", BACKEND_C_OPTS_GNU},
ARCH_X86
};
}
else if(target_name == "x86_64-unknown-freebsd")
{
return TargetSpec {
"unix", "freebsd", "gnu", {CodegenMode::Gnu11, false, "x86_64-unknown-freebsd", BACKEND_C_OPTS_GNU},
ARCH_X86_64
};
}
else if(target_name == "arm-unknown-freebsd")
{
return TargetSpec {
"unix", "freebsd", "gnu", {CodegenMode::Gnu11, true, "arm-unknown-freebsd", BACKEND_C_OPTS_GNU},
ARCH_ARM32
};
}
else if(target_name == "aarch64-unknown-freebsd")
{
return TargetSpec {
"unix", "freebsd", "gnu", {CodegenMode::Gnu11, false, "aarch64-unknown-freebsd", BACKEND_C_OPTS_GNU},
ARCH_ARM64
};
}
else if(target_name == "x86_64-unknown-netbsd")
{
return TargetSpec {
"unix", "netbsd", "gnu", {CodegenMode::Gnu11, false, "x86_64-unknown-netbsd", BACKEND_C_OPTS_GNU},
ARCH_X86_64
};
}
else if(target_name == "i686-unknown-openbsd")
{
return TargetSpec {
"unix", "openbsd", "gnu", {CodegenMode::Gnu11, true, "i686-unknown-openbsd", BACKEND_C_OPTS_GNU},
ARCH_X86
};
}
else if(target_name == "x86_64-unknown-openbsd")
{
return TargetSpec {
"unix", "openbsd", "gnu", {CodegenMode::Gnu11, false, "x86_64-unknown-openbsd", BACKEND_C_OPTS_GNU},
ARCH_X86_64
};
}
else if(target_name == "arm-unknown-openbsd")
{
return TargetSpec {
"unix", "openbsd", "gnu", {CodegenMode::Gnu11, true, "arm-unknown-openbsd", BACKEND_C_OPTS_GNU},
ARCH_ARM32
};
}
else if(target_name == "aarch64-unknown-openbsd")
{
return TargetSpec {
"unix", "openbsd", "gnu", {CodegenMode::Gnu11, false, "aarch64-unknown-openbsd", BACKEND_C_OPTS_GNU},
ARCH_ARM64
};
}
else if(target_name == "x86_64-unknown-dragonfly")
{
return TargetSpec {
"unix", "dragonfly", "gnu", {CodegenMode::Gnu11, false, "x86_64-unknown-dragonfly", BACKEND_C_OPTS_GNU},
ARCH_X86_64
};
}
else if(target_name == "i686-apple-darwin")
{
// NOTE: OSX uses Mach-O binaries, which don't fully support the defaults used for GNU targets
// The first 32bit Intel Mac was Core Solo aka yonah. It allows to use `-march=yonah` like Rust.
return TargetSpec {
"unix", "macos", "gnu", {CodegenMode::Gnu11, false, "x86_64-apple-darwin", {"-march=yonah"}, {}},
ARCH_X86_64
};
}
else if(target_name == "x86_64-apple-darwin")
{
// NOTE: OSX uses Mach-O binaries, which don't fully support the defaults used for GNU targets
// The first 64bit Intel Mac was Core Duo. It allows to use `-march=core2` like Rust.
return TargetSpec {
"unix", "macos", "gnu", {CodegenMode::Gnu11, false, "x86_64-apple-darwin", {"-march=core2"}, {}},
ARCH_X86_64
};
}
else if(target_name == "aarch64-apple-darwin")
{
// NOTE: OSX uses Mach-O binaries, which don't fully support the defaults used for GNU targets
return TargetSpec {
"unix", "macos", "gnu", {CodegenMode::Gnu11, false, "aarch64-apple-darwin", {}, {}},
ARCH_ARM64
};
}
else if(target_name == "arm-unknown-haiku")
{
return TargetSpec {
"unix", "haiku", "gnu", {CodegenMode::Gnu11, true, "arm-unknown-haiku", {}, {}},
ARCH_ARM32
};
}
else if(target_name == "x86_64-unknown-haiku")
{
return TargetSpec {
"unix", "haiku", "gnu", {CodegenMode::Gnu11, false, "x86_64-unknown-haiku", {}, {}},
ARCH_X86_64
};
}
else
{
::std::cerr << "Unknown target name '" << target_name << "'" << ::std::endl;
abort();
}
throw "";
}
}
const TargetSpec& Target_GetCurSpec()
{
return g_target;
}
void Target_ExportCurSpec(const ::std::string& filename)
{
save_spec_to_file(filename, g_target);
}
void Target_SetCfg(const ::std::string& target_name)
{
g_target = init_from_spec_name(target_name);
if(g_target.m_family == "unix") {
Cfg_SetFlag("unix");
}
else if( g_target.m_family == "windows") {
Cfg_SetFlag("windows");
}
Cfg_SetValue("target_family", g_target.m_family);
if( g_target.m_os_name == "linux" )
{
Cfg_SetFlag("linux");
Cfg_SetValue("target_vendor", "gnu");
}
if( g_target.m_os_name == "macos" )
{
Cfg_SetFlag("apple");
Cfg_SetValue("target_vendor", "apple");
}
if( g_target.m_os_name == "freebsd" )
{
Cfg_SetFlag("freebsd");
Cfg_SetValue("target_vendor", "unknown");
}
if( g_target.m_os_name == "netbsd" )
{
Cfg_SetFlag("netbsd");
Cfg_SetValue("target_vendor", "unknown");
}
if( g_target.m_os_name == "openbsd" )
{
Cfg_SetFlag("openbsd");
Cfg_SetValue("target_vendor", "unknown");
}
if( g_target.m_os_name == "dragonfly" )
{
Cfg_SetFlag("dragonfly");
Cfg_SetValue("target_vendor", "unknown");
}
Cfg_SetValue("target_vendor", ""); // NOTE: Doesn't override a pre-set value
Cfg_SetValue("target_env", g_target.m_env_name);
Cfg_SetValue("target_os", g_target.m_os_name);
Cfg_SetValue("target_pointer_width", FMT(g_target.m_arch.m_pointer_bits));
Cfg_SetValue("target_endian", g_target.m_arch.m_big_endian ? "big" : "little");
Cfg_SetValue("target_arch", g_target.m_arch.m_name);
if(g_target.m_arch.m_atomics.u8) { Cfg_SetValue("target_has_atomic", "8" ); Cfg_SetValue("target_has_atomic_load_store", "8" ); Cfg_SetValue("target_has_atomic_equal_alignment", "8" ); }
if(g_target.m_arch.m_atomics.u16) { Cfg_SetValue("target_has_atomic", "16" ); Cfg_SetValue("target_has_atomic_load_store", "16" ); Cfg_SetValue("target_has_atomic_equal_alignment", "16" ); }
if(g_target.m_arch.m_atomics.u32) { Cfg_SetValue("target_has_atomic", "32" ); Cfg_SetValue("target_has_atomic_load_store", "32" ); Cfg_SetValue("target_has_atomic_equal_alignment", "32"); }
if(g_target.m_arch.m_atomics.u64) { Cfg_SetValue("target_has_atomic", "64" ); Cfg_SetValue("target_has_atomic_load_store", "64" ); Cfg_SetValue("target_has_atomic_equal_alignment", "64"); }
if(g_target.m_arch.m_atomics.ptr) { Cfg_SetValue("target_has_atomic", "ptr"); Cfg_SetValue("target_has_atomic_load_store", "ptr"); Cfg_SetValue("target_has_atomic_equal_alignment", "ptr"); }
// TODO: Atomic compare-and-set option
if(g_target.m_arch.m_atomics.ptr) { Cfg_SetValue("target_has_atomic", "cas"); }
Cfg_SetValueCb("target_feature", [](const ::std::string& s) {
//if(g_target.m_arch.m_name == "x86_64" && s == "sse2") return true; // 1.39 ppv-lite86 requires sse2 (x86_64 always has it)
return false;
});
}
bool Target_GetSizeAndAlignOf(const Span& sp, const StaticTraitResolve& resolve, const ::HIR::TypeRef& ty, size_t& out_size, size_t& out_align)
{
//TRACE_FUNCTION_FR(ty, "size=" << out_size << ", align=" << out_align);
TU_MATCH_HDRA( (ty.data()), {)
TU_ARMA(Infer, te) {
BUG(sp, "sizeof on _ type");
}
TU_ARMA(Diverge, te) {
out_size = 0;
out_align = 0;
return true;
}
TU_ARMA(Primitive, te) {
switch(te)
{
case ::HIR::CoreType::Bool:
case ::HIR::CoreType::U8:
case ::HIR::CoreType::I8:
out_size = 1;
out_align = 1; // u8 is always 1 aligned
return true;
case ::HIR::CoreType::U16:
case ::HIR::CoreType::I16:
out_size = 2;
out_align = g_target.m_arch.m_alignments.u16;
return true;
case ::HIR::CoreType::U32:
case ::HIR::CoreType::I32:
case ::HIR::CoreType::Char:
out_size = 4;
out_align = g_target.m_arch.m_alignments.u32;
return true;
case ::HIR::CoreType::U64:
case ::HIR::CoreType::I64:
out_size = 8;
out_align = g_target.m_arch.m_alignments.u64;
return true;
case ::HIR::CoreType::U128:
case ::HIR::CoreType::I128:
out_size = 16;
// TODO: If i128 is emulated, this can be 8 (as it is on x86, where it's actually 4 due to the above comment)
if( g_target.m_backend_c.m_emulated_i128 )
out_align = g_target.m_arch.m_alignments.u64;
else
out_align = g_target.m_arch.m_alignments.u128;
return true;
case ::HIR::CoreType::Usize:
case ::HIR::CoreType::Isize:
out_size = g_target.m_arch.m_pointer_bits / 8;
out_align = g_target.m_arch.m_alignments.ptr;
return true;
case ::HIR::CoreType::F32:
out_size = 4;
out_align = g_target.m_arch.m_alignments.f32;
return true;
case ::HIR::CoreType::F64:
out_size = 8;
out_align = g_target.m_arch.m_alignments.f64;
return true;
case ::HIR::CoreType::Str:
DEBUG("sizeof on a `str` - unsized");
out_size = SIZE_MAX;
out_align = 1;
return true;
}
}
TU_ARMA(Path, te) {
if( te.binding.is_Opaque() )
return false;
if( te.binding.is_ExternType() )
{
DEBUG("sizeof on extern type - unsized");
out_align = 0;
out_size = SIZE_MAX;
return true;
}
const auto* repr = Target_GetTypeRepr(sp, resolve, ty);
if( !repr )
{
DEBUG("Cannot get type repr for " << ty);
return false;
}
out_size = repr->size;
out_align = repr->align;
return true;
}
TU_ARMA(Generic, te) {
// Unknown - return false
DEBUG("No repr for Generic - " << ty);
return false;
}
TU_ARMA(TraitObject, te) {
out_align = 0;
out_size = SIZE_MAX;
DEBUG("sizeof on a trait object - unsized");
return true;
}
TU_ARMA(ErasedType, te) {
BUG(sp, "sizeof on an erased type - shouldn't exist");
}
TU_ARMA(Array, te) {
if( !Target_GetSizeAndAlignOf(sp, resolve, te.inner, out_size,out_align) )
return false;
if( out_size == SIZE_MAX )
BUG(sp, "Unsized type in array - " << ty);
if( !te.size.is_Known() ) {
DEBUG("Size unknown - " << ty);
return false;
}
if( te.size.as_Known() == 0 || out_size == 0 )
{
out_size = 0;
}
else
{
if( SIZE_MAX / te.size.as_Known() <= out_size )
BUG(sp, "Integer overflow calculating array size");
out_size *= te.size.as_Known();
}
return true;
}
TU_ARMA(Slice, te) {
if( !Target_GetAlignOf(sp, resolve, te.inner, out_align) )
return false;
out_size = SIZE_MAX;
DEBUG("sizeof on a slice - unsized");
return true;
}
TU_ARMA(Tuple, te) {
const auto* repr = Target_GetTypeRepr(sp, resolve, ty);
if( !repr )
{
DEBUG("Cannot get type repr for " << ty);
return false;
}
out_size = repr->size;
out_align = repr->align;
return true;
}
TU_ARMA(Borrow, te) {
// - Alignment is machine native
out_align = g_target.m_arch.m_pointer_bits / 8;
// - Size depends on Sized-nes of the parameter
// TODO: Handle different types of Unsized (ones with different pointer sizes)
switch(resolve.metadata_type(sp, te.inner))
{
case MetadataType::Unknown:
return false;
case MetadataType::None:
case MetadataType::Zero:
out_size = g_target.m_arch.m_pointer_bits / 8;
break;
case MetadataType::Slice:
case MetadataType::TraitObject:
out_size = g_target.m_arch.m_pointer_bits / 8 * 2;
break;
}
return true;
}
TU_ARMA(Pointer, te) {
// - Alignment is machine native
out_align = g_target.m_arch.m_pointer_bits / 8;
// - Size depends on Sized-nes of the parameter
switch(resolve.metadata_type(sp, te.inner))
{
case MetadataType::Unknown:
return false;
case MetadataType::None:
case MetadataType::Zero:
out_size = g_target.m_arch.m_pointer_bits / 8;
break;
case MetadataType::Slice:
case MetadataType::TraitObject:
out_size = g_target.m_arch.m_pointer_bits / 8 * 2;
break;
}
return true;
}
TU_ARMA(Function, te) {
// Pointer size
out_size = g_target.m_arch.m_pointer_bits / 8;
out_align = g_target.m_arch.m_pointer_bits / 8;
return true;
}
TU_ARMA(Closure, te) {
BUG(sp, "Encountered closure type at trans stage - " << ty);
}
TU_ARMA(Generator, te) {
BUG(sp, "Encountered generator type at trans stage - " << ty);
}
}
return false;
}
bool Target_GetSizeOf(const Span& sp, const StaticTraitResolve& resolve, const ::HIR::TypeRef& ty, size_t& out_size)
{
size_t ignore_align;
bool rv = Target_GetSizeAndAlignOf(sp, resolve, ty, out_size, ignore_align);
if( rv && out_size == SIZE_MAX )
BUG(sp, "Getting size of Unsized type - " << ty);
return rv;
}
bool Target_GetAlignOf(const Span& sp, const StaticTraitResolve& resolve, const ::HIR::TypeRef& ty, size_t& out_align)
{
size_t ignore_size;
bool rv = Target_GetSizeAndAlignOf(sp, resolve, ty, ignore_size, out_align);
if( rv && ignore_size == SIZE_MAX )
BUG(sp, "Getting alignment of Unsized type - " << ty);
return rv;
}
namespace {
void set_type_repr(const Span& sp, const ::HIR::TypeRef& ty, ::std::unique_ptr<TypeRepr> repr);
struct Ent {
unsigned int field;
size_t size;
size_t align;
HIR::TypeRef ty;
};
::std::ostream& operator<<(std::ostream& os, const Ent& e) {
os << "Ent { #" << e.field << ": s=" << e.size << " a=" << e.align << " : " << e.ty << " }";
return os;
}
bool struct_enumerate_fields(const Span& sp, const StaticTraitResolve& resolve, const ::HIR::TypeRef& ty, ::std::vector<Ent>& ents)
{
const auto& te = ty.data().as_Path();
const auto& str = *te.binding.as_Struct();
auto monomorph_cb = MonomorphStatePtr(nullptr, &te.path.m_data.as_Generic().m_params, nullptr);
auto monomorph = [&](const auto& tpl) {
return resolve.monomorph_expand(sp, tpl, monomorph_cb);
};
TU_MATCH_HDRA( (str.m_data), {)
TU_ARMA(Unit, se) {
}
TU_ARMA(Tuple, se) {
unsigned int idx = 0;
for(const auto& e : se)
{
auto ty = monomorph(e.ent);
size_t size, align;
if( !Target_GetSizeAndAlignOf(sp, resolve, ty, size,align) )
{
DEBUG("Can't get size/align of " << ty);
return false;
}
DEBUG("#" << idx << ": s=" << size << ",a=" << align << " " << ty);
ents.push_back(Ent { idx++, size, align, mv$(ty) });
}
}
TU_ARMA(Named, se) {
unsigned int idx = 0;
for(const auto& e : se)
{
auto ty = monomorph(e.second.ent);
size_t size, align;
if( !Target_GetSizeAndAlignOf(sp, resolve, ty, size,align) )
{
DEBUG("Can't get size/align of " << ty);
return false;
}
DEBUG("#" << idx << " " << e.first << ": s=" << size << ",a=" << align << " " << ty);
ents.push_back(Ent { idx++, size, align, mv$(ty) });
}
}
}
return true;
}
enum class StructSorting
{
None,
AllButFinal,
All,
};
// Sort fields with lowest alignment first (and putting smallest fields of equal alignment earlier)
bool sortfn_struct_fields(const Ent& a, const Ent& b) {
return a.align != b.align ? a.align < b.align : a.size < b.size;
}
/// Generate a struct representation using the provided entries
///
/// - Handles (optional) sorting and packing
::std::unique_ptr<TypeRepr> make_type_repr_struct__inner(const Span&sp, const ::HIR::TypeRef& ty, ::std::vector<Ent>& ents, StructSorting sorting, unsigned forced_alignment, unsigned max_alignment)
{
if(ents.size() > 0)
{
// Sort in increasing alignment then size
switch(sorting)
{
case StructSorting::None:
break;
case StructSorting::AllButFinal:
::std::sort(ents.begin(), ents.end() - 1, sortfn_struct_fields);
break;
case StructSorting::All:
::std::sort(ents.begin(), ents.end(), sortfn_struct_fields);
break;
}
}
unsigned max_field = 0;
for(const auto& e : ents) {
if(e.field != ~0u)
max_field = std::max(max_field, e.field);
}
::std::vector<TypeRepr::Field> fields(ents.size() > 0 ? max_field + 1 : 0);