1 files changed, 188 insertions, 0 deletions
diff --git a/compiler/rustc_llvm/src/lib.rs b/compiler/rustc_llvm/src/lib.rs
new file mode 100644
index 000000000..8eade02a4
--- /dev/null
+++ b/compiler/rustc_llvm/src/lib.rs
@@ -0,0 +1,188 @@
+#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
+
+// NOTE: This crate only exists to allow linking on mingw targets.
+
+use libc::{c_char, size_t};
+use std::cell::RefCell;
+use std::slice;
+
+#[repr(C)]
+pub struct RustString {
+    pub bytes: RefCell<Vec<u8>>,
+}
+
+impl RustString {
+    pub fn len(&self) -> usize {
+        self.bytes.borrow().len()
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.bytes.borrow().is_empty()
+    }
+}
+
+/// Appending to a Rust string -- used by RawRustStringOstream.
+#[no_mangle]
+pub unsafe extern "C" fn LLVMRustStringWriteImpl(
+    sr: &RustString,
+    ptr: *const c_char,
+    size: size_t,
+) {
+    let slice = slice::from_raw_parts(ptr as *const u8, size as usize);
+
+    sr.bytes.borrow_mut().extend_from_slice(slice);
+}
+
+/// Initialize targets enabled by the build script via `cfg(llvm_component = "...")`.
+/// N.B., this function can't be moved to `rustc_codegen_llvm` because of the `cfg`s.
+pub fn initialize_available_targets() {
+    macro_rules! init_target(
+        ($cfg:meta, $($method:ident),*) => { {
+            #[cfg($cfg)]
+            fn init() {
+                extern "C" {
+                    $(fn $method();)*
+                }
+                unsafe {
+                    $($method();)*
+                }
+            }
+            #[cfg(not($cfg))]
+            fn init() { }
+            init();
+        } }
+    );
+    init_target!(
+        llvm_component = "x86",
+        LLVMInitializeX86TargetInfo,
+        LLVMInitializeX86Target,
+        LLVMInitializeX86TargetMC,
+        LLVMInitializeX86AsmPrinter,
+        LLVMInitializeX86AsmParser
+    );
+    init_target!(
+        llvm_component = "arm",
+        LLVMInitializeARMTargetInfo,
+        LLVMInitializeARMTarget,
+        LLVMInitializeARMTargetMC,
+        LLVMInitializeARMAsmPrinter,
+        LLVMInitializeARMAsmParser
+    );
+    init_target!(
+        llvm_component = "aarch64",
+        LLVMInitializeAArch64TargetInfo,
+        LLVMInitializeAArch64Target,
+        LLVMInitializeAArch64TargetMC,
+        LLVMInitializeAArch64AsmPrinter,
+        LLVMInitializeAArch64AsmParser
+    );
+    init_target!(
+        llvm_component = "amdgpu",
+        LLVMInitializeAMDGPUTargetInfo,
+        LLVMInitializeAMDGPUTarget,
+        LLVMInitializeAMDGPUTargetMC,
+        LLVMInitializeAMDGPUAsmPrinter,
+        LLVMInitializeAMDGPUAsmParser
+    );
+    init_target!(
+        llvm_component = "avr",
+        LLVMInitializeAVRTargetInfo,
+        LLVMInitializeAVRTarget,
+        LLVMInitializeAVRTargetMC,
+        LLVMInitializeAVRAsmPrinter,
+        LLVMInitializeAVRAsmParser
+    );
+    init_target!(
+        llvm_component = "m68k",
+        LLVMInitializeM68kTargetInfo,
+        LLVMInitializeM68kTarget,
+        LLVMInitializeM68kTargetMC,
+        LLVMInitializeM68kAsmPrinter,
+        LLVMInitializeM68kAsmParser
+    );
+    init_target!(
+        llvm_component = "mips",
+        LLVMInitializeMipsTargetInfo,
+        LLVMInitializeMipsTarget,
+        LLVMInitializeMipsTargetMC,
+        LLVMInitializeMipsAsmPrinter,
+        LLVMInitializeMipsAsmParser
+    );
+    init_target!(
+        llvm_component = "powerpc",
+        LLVMInitializePowerPCTargetInfo,
+        LLVMInitializePowerPCTarget,
+        LLVMInitializePowerPCTargetMC,
+        LLVMInitializePowerPCAsmPrinter,
+        LLVMInitializePowerPCAsmParser
+    );
+    init_target!(
+        llvm_component = "systemz",
+        LLVMInitializeSystemZTargetInfo,
+        LLVMInitializeSystemZTarget,
+        LLVMInitializeSystemZTargetMC,
+        LLVMInitializeSystemZAsmPrinter,
+        LLVMInitializeSystemZAsmParser
+    );
+    init_target!(
+        llvm_component = "jsbackend",
+        LLVMInitializeJSBackendTargetInfo,
+        LLVMInitializeJSBackendTarget,
+        LLVMInitializeJSBackendTargetMC
+    );
+    init_target!(
+        llvm_component = "msp430",
+        LLVMInitializeMSP430TargetInfo,
+        LLVMInitializeMSP430Target,
+        LLVMInitializeMSP430TargetMC,
+        LLVMInitializeMSP430AsmPrinter,
+        LLVMInitializeMSP430AsmParser
+    );
+    init_target!(
+        llvm_component = "riscv",
+        LLVMInitializeRISCVTargetInfo,
+        LLVMInitializeRISCVTarget,
+        LLVMInitializeRISCVTargetMC,
+        LLVMInitializeRISCVAsmPrinter,
+        LLVMInitializeRISCVAsmParser
+    );
+    init_target!(
+        llvm_component = "sparc",
+        LLVMInitializeSparcTargetInfo,
+        LLVMInitializeSparcTarget,
+        LLVMInitializeSparcTargetMC,
+        LLVMInitializeSparcAsmPrinter,
+        LLVMInitializeSparcAsmParser
+    );
+    init_target!(
+        llvm_component = "nvptx",
+        LLVMInitializeNVPTXTargetInfo,
+        LLVMInitializeNVPTXTarget,
+        LLVMInitializeNVPTXTargetMC,
+        LLVMInitializeNVPTXAsmPrinter
+    );
+    init_target!(
+        llvm_component = "hexagon",
+        LLVMInitializeHexagonTargetInfo,
+        LLVMInitializeHexagonTarget,
+        LLVMInitializeHexagonTargetMC,
+        LLVMInitializeHexagonAsmPrinter,
+        LLVMInitializeHexagonAsmParser
+    );
+    init_target!(
+        llvm_component = "webassembly",
+        LLVMInitializeWebAssemblyTargetInfo,
+        LLVMInitializeWebAssemblyTarget,
+        LLVMInitializeWebAssemblyTargetMC,
+        LLVMInitializeWebAssemblyAsmPrinter,
+        LLVMInitializeWebAssemblyAsmParser
+    );
+    init_target!(
+        llvm_component = "bpf",
+        LLVMInitializeBPFTargetInfo,
+        LLVMInitializeBPFTarget,
+        LLVMInitializeBPFTargetMC,
+        LLVMInitializeBPFAsmPrinter,
+        LLVMInitializeBPFAsmParser
+    );
+}