compiler/rustc_llvm: Enable M68k LLVM target

compiler/rustc_llvm/build.rs

@@ -76,6 +76,7 @@ fn main() {
         "aarch64",
         "amdgpu",
         "avr",
+        "m68k",
         "mips",
         "powerpc",
         "systemz",

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -201,6 +201,12 @@ void LLVMRustAddLastExtensionPasses(
 #define SUBTARGET_AVR
 #endif
 
+#ifdef LLVM_COMPONENT_M68k
+#define SUBTARGET_M68K SUBTARGET(M68k)
+#else
+#define SUBTARGET_M68K
+#endif
+
 #ifdef LLVM_COMPONENT_MIPS
 #define SUBTARGET_MIPS SUBTARGET(Mips)
 #else
@@ -248,6 +254,7 @@ void LLVMRustAddLastExtensionPasses(
   SUBTARGET_ARM                                                                \
   SUBTARGET_AARCH64                                                            \
   SUBTARGET_AVR                                                                \
+  SUBTARGET_M68K                                                               \
   SUBTARGET_MIPS                                                               \
   SUBTARGET_PPC                                                                \
   SUBTARGET_SYSTEMZ                                                            \

compiler/rustc_llvm/src/lib.rs

@@ -90,6 +90,14 @@ pub fn initialize_available_targets() {
         LLVMInitializeAVRAsmPrinter,
         LLVMInitializeAVRAsmParser
     );
+    init_target!(
+        llvm_component = "m68k",
+        LLVMInitializeM68kTargetInfo,
+        LLVMInitializeM68kTarget,
+        LLVMInitializeM68kTargetMC,
+        LLVMInitializeM68kAsmPrinter,
+        LLVMInitializeM68kAsmParser
+    );
     init_target!(
         llvm_component = "mips",
         LLVMInitializeMipsTargetInfo,