compiler/rustc_llvm/src/lib.rs

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