compiler/rustc_llvm/src/lib.rs

   1 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
   2
   3 // NOTE: This crate only exists to allow linking on mingw targets.
   4
   5 use libc::{c_char, size_t};
   6 use std::cell::RefCell;
   7 use std::slice;
   8
   9 #[repr(C)]
  10 pub struct RustString {
  11     pub bytes: RefCell<Vec<u8>>,
  12 }
  13
  14 impl RustString {
  15     pub fn len(&self) -> usize {
  16         self.bytes.borrow().len()
  17     }
  18
  19     pub fn is_empty(&self) -> bool {
  20         self.bytes.borrow().is_empty()
  21     }
  22 }
  23
  24 /// Appending to a Rust string -- used by RawRustStringOstream.
  25 #[no_mangle]
  26 pub unsafe extern "C" fn LLVMRustStringWriteImpl(
  27     sr: &RustString,
  28     ptr: *const c_char,
  29     size: size_t,
  30 ) {
  31     let slice = slice::from_raw_parts(ptr as *const u8, size as usize);
  32
  33     sr.bytes.borrow_mut().extend_from_slice(slice);
  34 }
  35
  36 /// Initialize targets enabled by the build script via `cfg(llvm_component = "...")`.
  37 /// N.B., this function can't be moved to `rustc_codegen_llvm` because of the `cfg`s.
  38 pub fn initialize_available_targets() {
  39     macro_rules! init_target(
  40         ($cfg:meta, $($method:ident),*) => { {
  41             #[cfg($cfg)]
  42             fn init() {
  43                 extern "C" {
  44                     $(fn $method();)*
  45                 }
  46                 unsafe {
  47                     $($method();)*
  48                 }
  49             }
  50             #[cfg(not($cfg))]
  51             fn init() { }
  52             init();
  53         } }
  54     );
  55     init_target!(
  56         llvm_component = "x86",
  57         LLVMInitializeX86TargetInfo,
  58         LLVMInitializeX86Target,
  59         LLVMInitializeX86TargetMC,
  60         LLVMInitializeX86AsmPrinter,
  61         LLVMInitializeX86AsmParser
  62     );
  63     init_target!(
  64         llvm_component = "arm",
  65         LLVMInitializeARMTargetInfo,
  66         LLVMInitializeARMTarget,
  67         LLVMInitializeARMTargetMC,
  68         LLVMInitializeARMAsmPrinter,
  69         LLVMInitializeARMAsmParser
  70     );
  71     init_target!(
  72         llvm_component = "aarch64",
  73         LLVMInitializeAArch64TargetInfo,
  74         LLVMInitializeAArch64Target,
  75         LLVMInitializeAArch64TargetMC,
  76         LLVMInitializeAArch64AsmPrinter,
  77         LLVMInitializeAArch64AsmParser
  78     );
  79     init_target!(
  80         llvm_component = "amdgpu",
  81         LLVMInitializeAMDGPUTargetInfo,
  82         LLVMInitializeAMDGPUTarget,
  83         LLVMInitializeAMDGPUTargetMC,
  84         LLVMInitializeAMDGPUAsmPrinter,
  85         LLVMInitializeAMDGPUAsmParser
  86     );
  87     init_target!(
  88         llvm_component = "avr",
  89         LLVMInitializeAVRTargetInfo,
  90         LLVMInitializeAVRTarget,
  91         LLVMInitializeAVRTargetMC,
  92         LLVMInitializeAVRAsmPrinter,
  93         LLVMInitializeAVRAsmParser
  94     );
  95     init_target!(
  96         llvm_component = "m68k",
  97         LLVMInitializeM68kTargetInfo,
  98         LLVMInitializeM68kTarget,
  99         LLVMInitializeM68kTargetMC,
 100         LLVMInitializeM68kAsmPrinter,
 101         LLVMInitializeM68kAsmParser
 102     );
 103     init_target!(
 104         llvm_component = "mips",
 105         LLVMInitializeMipsTargetInfo,
 106         LLVMInitializeMipsTarget,
 107         LLVMInitializeMipsTargetMC,
 108         LLVMInitializeMipsAsmPrinter,
 109         LLVMInitializeMipsAsmParser
 110     );
 111     init_target!(
 112         llvm_component = "powerpc",
 113         LLVMInitializePowerPCTargetInfo,
 114         LLVMInitializePowerPCTarget,
 115         LLVMInitializePowerPCTargetMC,
 116         LLVMInitializePowerPCAsmPrinter,
 117         LLVMInitializePowerPCAsmParser
 118     );
 119     init_target!(
 120         llvm_component = "systemz",
 121         LLVMInitializeSystemZTargetInfo,
 122         LLVMInitializeSystemZTarget,
 123         LLVMInitializeSystemZTargetMC,
 124         LLVMInitializeSystemZAsmPrinter,
 125         LLVMInitializeSystemZAsmParser
 126     );
 127     init_target!(
 128         llvm_component = "jsbackend",
 129         LLVMInitializeJSBackendTargetInfo,
 130         LLVMInitializeJSBackendTarget,
 131         LLVMInitializeJSBackendTargetMC
 132     );
 133     init_target!(
 134         llvm_component = "msp430",
 135         LLVMInitializeMSP430TargetInfo,
 136         LLVMInitializeMSP430Target,
 137         LLVMInitializeMSP430TargetMC,
 138         LLVMInitializeMSP430AsmPrinter,
 139         LLVMInitializeMSP430AsmParser
 140     );
 141     init_target!(
 142         llvm_component = "riscv",
 143         LLVMInitializeRISCVTargetInfo,
 144         LLVMInitializeRISCVTarget,
 145         LLVMInitializeRISCVTargetMC,
 146         LLVMInitializeRISCVAsmPrinter,
 147         LLVMInitializeRISCVAsmParser
 148     );
 149     init_target!(
 150         llvm_component = "sparc",
 151         LLVMInitializeSparcTargetInfo,
 152         LLVMInitializeSparcTarget,
 153         LLVMInitializeSparcTargetMC,
 154         LLVMInitializeSparcAsmPrinter,
 155         LLVMInitializeSparcAsmParser
 156     );
 157     init_target!(
 158         llvm_component = "nvptx",
 159         LLVMInitializeNVPTXTargetInfo,
 160         LLVMInitializeNVPTXTarget,
 161         LLVMInitializeNVPTXTargetMC,
 162         LLVMInitializeNVPTXAsmPrinter
 163     );
 164     init_target!(
 165         llvm_component = "hexagon",
 166         LLVMInitializeHexagonTargetInfo,
 167         LLVMInitializeHexagonTarget,
 168         LLVMInitializeHexagonTargetMC,
 169         LLVMInitializeHexagonAsmPrinter,
 170         LLVMInitializeHexagonAsmParser
 171     );
 172     init_target!(
 173         llvm_component = "webassembly",
 174         LLVMInitializeWebAssemblyTargetInfo,
 175         LLVMInitializeWebAssemblyTarget,
 176         LLVMInitializeWebAssemblyTargetMC,
 177         LLVMInitializeWebAssemblyAsmPrinter,
 178         LLVMInitializeWebAssemblyAsmParser
 179     );
 180     init_target!(
 181         llvm_component = "bpf",
 182         LLVMInitializeBPFTargetInfo,
 183         LLVMInitializeBPFTarget,
 184         LLVMInitializeBPFTargetMC,
 185         LLVMInitializeBPFAsmPrinter,
 186         LLVMInitializeBPFAsmParser
 187     );
 188 }