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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/Target/RISCV/RISCVAssemblyPrinter.h"
#include "rcc/CodeGen/CompilationUnit.h"
#include "rcc/CodeGen/GlobalObject.h"
#include "rcc/Target/RISCV/RISCVTarget.h"
#include <cstddef>
#include <cstdint>
#include <iostream>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
namespace {
int fail(std::string_view Message) {
std::cerr << Message << '\n';
return 1;
}
[[nodiscard]] bool contains(std::string_view Text, std::string_view Needle) {
return Text.find(Needle) != std::string_view::npos;
}
[[nodiscard]] rcc::Expected<rcc::GlobalObjectDesc>
makeObject(std::string Symbol, std::uint64_t Size, std::uint64_t Alignment,
rcc::GlobalInitializer Initializer, bool IsConstant = false) {
auto Align = rcc::Alignment::create(Alignment);
if (!Align)
return std::unexpected(Align.error());
rcc::GlobalObjectDesc Object;
Object.Symbol = std::move(Symbol);
Object.ObjectType = rcc::GenericConstantType::byte();
Object.Align = *Align;
Object.Size = Size;
Object.IsConstant = IsConstant;
Object.Initializer.emplace(std::move(Initializer));
auto Verification = Object.verify();
if (!Verification)
return std::unexpected(Verification.error());
return Object;
}
[[nodiscard]] rcc::Expected<void> addObjects(rcc::CompilationUnit &Unit) {
auto AnswerValue = rcc::APInt::fromUnsigned(32, 42);
if (!AnswerValue)
return std::unexpected(AnswerValue.error());
auto Answer =
makeObject("answer", 4, 4, rcc::GlobalInitializer::integer(std::move(*AnswerValue)), true);
if (!Answer)
return std::unexpected(Answer.error());
Answer->Visibility = rcc::GlobalVisibility::Hidden;
if (!Unit.addGlobalObject(std::move(*Answer)))
return rcc::makeUnexpected(rcc::ErrorCode::InternalError, "failed to add answer");
auto Zero = rcc::GlobalInitializer::zeroFill(16);
if (!Zero)
return std::unexpected(Zero.error());
auto Buffer = makeObject("zero_buffer", 16, 16, std::move(*Zero));
if (!Buffer)
return std::unexpected(Buffer.error());
Buffer->Linkage = rcc::GlobalLinkage::Internal;
if (!Unit.addGlobalObject(std::move(*Buffer)))
return rcc::makeUnexpected(rcc::ErrorCode::InternalError, "failed to add buffer");
auto TLSZero = rcc::GlobalInitializer::zeroFill(8);
if (!TLSZero)
return std::unexpected(TLSZero.error());
auto TLS = makeObject("tls_counter", 8, 8, std::move(*TLSZero));
if (!TLS)
return std::unexpected(TLS.error());
TLS->TLSModel = rcc::GlobalTLSModel::LocalExec;
if (!Unit.addGlobalObject(std::move(*TLS)))
return rcc::makeUnexpected(rcc::ErrorCode::InternalError, "failed to add TLS object");
auto Address = rcc::GlobalInitializer::symbolAddress(
rcc::GlobalSymbolAddress{.Symbol = "answer", .Addend = 8, .Size = 8, .TargetFlags = 0});
if (!Address)
return std::unexpected(Address.error());
auto Pointer = makeObject("answer_pointer", 8, 8, std::move(*Address), true);
if (!Pointer)
return std::unexpected(Pointer.error());
Pointer->Linkage = rcc::GlobalLinkage::WeakAny;
if (!Unit.addGlobalObject(std::move(*Pointer)))
return rcc::makeUnexpected(rcc::ErrorCode::InternalError, "failed to add pointer");
auto Bytes = rcc::GlobalInitializer::bytes(
{std::byte{0x52}, std::byte{0x43}, std::byte{0x43}, std::byte{0x00}});
if (!Bytes)
return std::unexpected(Bytes.error());
auto Grouped = makeObject("grouped_data", 4, 4, std::move(*Bytes));
if (!Grouped)
return std::unexpected(Grouped.error());
Grouped->Linkage = rcc::GlobalLinkage::LinkOnceODR;
Grouped->COMDAT = "grouped_data";
if (!Unit.addGlobalObject(std::move(*Grouped)))
return rcc::makeUnexpected(rcc::ErrorCode::InternalError, "failed to add COMDAT object");
auto CommonAlign = rcc::Alignment::create(16);
if (!CommonAlign)
return std::unexpected(CommonAlign.error());
rcc::GlobalObjectDesc Common;
Common.Symbol = "tentative";
Common.ObjectType = rcc::GenericConstantType::byte();
Common.Linkage = rcc::GlobalLinkage::Common;
Common.Align = *CommonAlign;
Common.Size = 32;
if (!Unit.addGlobalObject(std::move(Common)))
return rcc::makeUnexpected(rcc::ErrorCode::InternalError, "failed to add common object");
return {};
}
} // namespace
int main(int ArgumentCount, char **Arguments) {
auto Target = rcc::riscv::createTargetDescription();
if (!Target)
return fail(Target.error().message());
rcc::CompilationUnit Unit;
auto Added = addObjects(Unit);
if (!Added)
return fail(Added.error().message());
auto Assembly = rcc::riscv::emitAssembly(Unit, *Target);
if (!Assembly)
return fail(Assembly.error().message());
if (ArgumentCount == 2 && std::string_view(Arguments[1]) == "--print") {
std::cout << *Assembly;
return 0;
}
const std::string_view Text = *Assembly;
if (!contains(Text, ".section .rodata,\"a\",@progbits\n") || !contains(Text, ".globl answer\n") ||
!contains(Text, ".hidden answer\n") || !contains(Text, ".type answer, @object\n") ||
!contains(Text, "answer:\n") || !contains(Text, ".byte 0x2a, 0x00, 0x00, 0x00\n") ||
!contains(Text, ".size answer, 4\n")) {
return fail("read-only global assembly is incomplete");
}
if (!contains(Text, ".section .bss,\"aw\",@nobits\n") ||
!contains(Text, ".local zero_buffer\n") || !contains(Text, "zero_buffer:\n") ||
!contains(Text, ".zero 16\n")) {
return fail("BSS global assembly is incomplete");
}
if (!contains(Text, ".section .tbss,\"awT\",@nobits\n") ||
!contains(Text, ".type tls_counter, @tls_object\n")) {
return fail("TLS global assembly is incomplete");
}
if (!contains(Text, ".section .data.rel.ro,\"aw\",@progbits\n") ||
!contains(Text, ".weak answer_pointer\n") || !contains(Text, ".8byte (answer+8)\n")) {
return fail("relocatable constant global assembly is incomplete");
}
if (!contains(Text, ".section .data.grouped_data,\"awG\",@progbits,grouped_data,comdat\n") ||
!contains(Text, ".weak grouped_data\n")) {
return fail("COMDAT global assembly is incomplete");
}
if (!contains(Text, ".comm tentative,32,16\n"))
return fail("common global assembly is incomplete");
if (!contains(Text, ".attribute arch, \"rv64gc\"\n") ||
!contains(Text, ".section \".note.GNU-stack\",\"\",@progbits\n")) {
std::cerr << Text;
return fail("RV64GC file directives are incomplete");
}
rcc::CompilationUnit UnsupportedUnit;
auto UnsupportedZero = rcc::GlobalInitializer::zeroFill(1);
if (!UnsupportedZero)
return fail("unsupported global test initializer creation failed");
auto UnsupportedObject = makeObject("unsupported_global", 1, 1, std::move(*UnsupportedZero));
if (!UnsupportedObject)
return fail("unsupported global test object creation failed");
UnsupportedObject->TargetFlags = 1;
if (!UnsupportedUnit.addGlobalObject(std::move(*UnsupportedObject)))
return fail("unsupported global test insertion failed");
auto UnsupportedAssembly = rcc::riscv::emitAssembly(UnsupportedUnit, *Target);
if (UnsupportedAssembly || UnsupportedAssembly.error().code() != rcc::ErrorCode::Unsupported)
return fail("RV64GC assembly must reject unknown global target state");
return 0;
}
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