The xtensa triples are recognized by the compiler. Need to implement the calling convention, target -> call -> abi

Author: MabezDev

src/librustc_llvm/build.rs

@@ -72,7 +72,7 @@ fn main() {
     let mut optional_components =
         vec!["x86", "arm", "aarch64", "amdgpu", "mips", "powerpc",
              "systemz", "jsbackend", "webassembly", "msp430", "sparc", "nvptx",
-             "hexagon"];
+             "hexagon", "xtensa"];
 
     let mut version_cmd = Command::new(&llvm_config);
     version_cmd.arg("--version");

src/librustc_llvm/lib.rs

@@ -105,4 +105,12 @@ pub fn initialize_available_targets() {
                  LLVMInitializeWebAssemblyTarget,
                  LLVMInitializeWebAssemblyTargetMC,
                  LLVMInitializeWebAssemblyAsmPrinter);
+    init_target!(llvm_component = "xtensa",
+                 LLVMInitializeXtensaTargetInfo,
+                 LLVMInitializeXtensaTarget,
+                 LLVMInitializeXtensaTargetMC,
+                 LLVMInitializeXtensaAsmPrinter
+                 LLVMInitializeXtensaAsmParser);
+                 );
+
 }

src/rustllvm/PassWrapper.cpp

@@ -174,6 +174,14 @@ void LLVMRustAddLastExtensionPasses(
 #define SUBTARGET_HEXAGON
 #endif
 
+#ifdef LLVM_COMPONENT_XTENSA
+#define SUBTARGET_XTENSA SUBTARGET(XTENSA)
+#else
+#define SUBTARGET_XTENSA
+#endif
+
+
+
 #define GEN_SUBTARGETS                                                         \
   SUBTARGET_X86                                                                \
   SUBTARGET_ARM                                                                \
@@ -185,6 +193,7 @@ void LLVMRustAddLastExtensionPasses(
   SUBTARGET_SPARC                                                              \
   SUBTARGET_HEXAGON                                                            \
   SUBTARGET_RISCV                                                              \
+  SUBTARGET_XTENSA                                                              \
 
 #define SUBTARGET(x)                                                           \
   namespace llvm {                                                             \