compiler/rustc_llvm/src/lib.rs

   1 #![feature(nll)]
   2 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
   3
   4 // NOTE: This crate only exists to allow linking on mingw targets.
   5
   6 use libc::{c_char, size_t};
   7 use std::cell::RefCell;
   8 use std::slice;
   9
  10 #[repr(C)]
  11 pub struct RustString {
  12     pub bytes: RefCell<Vec<u8>>,
  13 }
  14
  15 impl RustString {
  16     pub fn len(&self) -> usize {
  17         self.bytes.borrow().len()
  18     }
  19
  20     pub fn is_empty(&self) -> bool {
  21         self.bytes.borrow().is_empty()
  22     }
  23 }
  24
  25 /// Appending to a Rust string -- used by RawRustStringOstream.
  26 #[no_mangle]
  27 pub unsafe extern "C" fn LLVMRustStringWriteImpl(
  28     sr: &RustString,
  29     ptr: *const c_char,
  30     size: size_t,
  31 ) {
  32     let slice = slice::from_raw_parts(ptr as *const u8, size as usize);
  33
  34     sr.bytes.borrow_mut().extend_from_slice(slice);
  35 }
  36
  37 /// Initialize targets enabled by the build script via `cfg(llvm_component = "...")`.
  38 /// N.B., this function can't be moved to `rustc_codegen_llvm` because of the `cfg`s.
  39 pub fn initialize_available_targets() {
  40     macro_rules! init_target(
  41         ($cfg:meta, $($method:ident),*) => { {
  42             #[cfg($cfg)]
  43             fn init() {
  44                 extern "C" {
  45                     $(fn $method();)*
  46                 }
  47                 unsafe {
  48                     $($method();)*
  49                 }
  50             }
  51             #[cfg(not($cfg))]
  52             fn init() { }
  53             init();
  54         } }
  55     );
  56     init_target!(
  57         llvm_component = "x86",
  58         LLVMInitializeX86TargetInfo,
  59         LLVMInitializeX86Target,
  60         LLVMInitializeX86TargetMC,
  61         LLVMInitializeX86AsmPrinter,
  62         LLVMInitializeX86AsmParser
  63     );
  64     init_target!(
  65         llvm_component = "arm",
  66         LLVMInitializeARMTargetInfo,
  67         LLVMInitializeARMTarget,
  68         LLVMInitializeARMTargetMC,
  69         LLVMInitializeARMAsmPrinter,
  70         LLVMInitializeARMAsmParser
  71     );
  72     init_target!(
  73         llvm_component = "aarch64",
  74         LLVMInitializeAArch64TargetInfo,
  75         LLVMInitializeAArch64Target,
  76         LLVMInitializeAArch64TargetMC,
  77         LLVMInitializeAArch64AsmPrinter,
  78         LLVMInitializeAArch64AsmParser
  79     );
  80     init_target!(
  81         llvm_component = "amdgpu",
  82         LLVMInitializeAMDGPUTargetInfo,
  83         LLVMInitializeAMDGPUTarget,
  84         LLVMInitializeAMDGPUTargetMC,
  85         LLVMInitializeAMDGPUAsmPrinter,
  86         LLVMInitializeAMDGPUAsmParser
  87     );
  88     init_target!(
  89         llvm_component = "avr",
  90         LLVMInitializeAVRTargetInfo,
  91         LLVMInitializeAVRTarget,
  92         LLVMInitializeAVRTargetMC,
  93         LLVMInitializeAVRAsmPrinter,
  94         LLVMInitializeAVRAsmParser
  95     );
  96     init_target!(
  97         llvm_component = "m68k",
  98         LLVMInitializeM68kTargetInfo,
  99         LLVMInitializeM68kTarget,
 100         LLVMInitializeM68kTargetMC,
 101         LLVMInitializeM68kAsmPrinter,
 102         LLVMInitializeM68kAsmParser
 103     );
 104     init_target!(
 105         llvm_component = "mips",
 106         LLVMInitializeMipsTargetInfo,
 107         LLVMInitializeMipsTarget,
 108         LLVMInitializeMipsTargetMC,
 109         LLVMInitializeMipsAsmPrinter,
 110         LLVMInitializeMipsAsmParser
 111     );
 112     init_target!(
 113         llvm_component = "powerpc",
 114         LLVMInitializePowerPCTargetInfo,
 115         LLVMInitializePowerPCTarget,
 116         LLVMInitializePowerPCTargetMC,
 117         LLVMInitializePowerPCAsmPrinter,
 118         LLVMInitializePowerPCAsmParser
 119     );
 120     init_target!(
 121         llvm_component = "systemz",
 122         LLVMInitializeSystemZTargetInfo,
 123         LLVMInitializeSystemZTarget,
 124         LLVMInitializeSystemZTargetMC,
 125         LLVMInitializeSystemZAsmPrinter,
 126         LLVMInitializeSystemZAsmParser
 127     );
 128     init_target!(
 129         llvm_component = "jsbackend",
 130         LLVMInitializeJSBackendTargetInfo,
 131         LLVMInitializeJSBackendTarget,
 132         LLVMInitializeJSBackendTargetMC
 133     );
 134     init_target!(
 135         llvm_component = "msp430",
 136         LLVMInitializeMSP430TargetInfo,
 137         LLVMInitializeMSP430Target,
 138         LLVMInitializeMSP430TargetMC,
 139         LLVMInitializeMSP430AsmPrinter,
 140         LLVMInitializeMSP430AsmParser
 141     );
 142     init_target!(
 143         llvm_component = "riscv",
 144         LLVMInitializeRISCVTargetInfo,
 145         LLVMInitializeRISCVTarget,
 146         LLVMInitializeRISCVTargetMC,
 147         LLVMInitializeRISCVAsmPrinter,
 148         LLVMInitializeRISCVAsmParser
 149     );
 150     init_target!(
 151         llvm_component = "sparc",
 152         LLVMInitializeSparcTargetInfo,
 153         LLVMInitializeSparcTarget,
 154         LLVMInitializeSparcTargetMC,
 155         LLVMInitializeSparcAsmPrinter,
 156         LLVMInitializeSparcAsmParser
 157     );
 158     init_target!(
 159         llvm_component = "nvptx",
 160         LLVMInitializeNVPTXTargetInfo,
 161         LLVMInitializeNVPTXTarget,
 162         LLVMInitializeNVPTXTargetMC,
 163         LLVMInitializeNVPTXAsmPrinter
 164     );
 165     init_target!(
 166         llvm_component = "hexagon",
 167         LLVMInitializeHexagonTargetInfo,
 168         LLVMInitializeHexagonTarget,
 169         LLVMInitializeHexagonTargetMC,
 170         LLVMInitializeHexagonAsmPrinter,
 171         LLVMInitializeHexagonAsmParser
 172     );
 173     init_target!(
 174         llvm_component = "webassembly",
 175         LLVMInitializeWebAssemblyTargetInfo,
 176         LLVMInitializeWebAssemblyTarget,
 177         LLVMInitializeWebAssemblyTargetMC,
 178         LLVMInitializeWebAssemblyAsmPrinter,
 179         LLVMInitializeWebAssemblyAsmParser
 180     );
 181     init_target!(
 182         llvm_component = "bpf",
 183         LLVMInitializeBPFTargetInfo,
 184         LLVMInitializeBPFTarget,
 185         LLVMInitializeBPFTargetMC,
 186         LLVMInitializeBPFAsmPrinter,
 187         LLVMInitializeBPFAsmParser
 188     );
 189 }