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

Author: MabezDev

src/librustc_llvm/build.rs

@@ -77,6 +77,7 @@ fn main() {
         "sparc",
         "nvptx",
         "hexagon",
+        "xtensa",
     ];
 
     let mut version_cmd = Command::new(&llvm_config);
@@ -250,7 +251,11 @@ fn main() {
     let llvm_use_libcxx = env::var_os("LLVM_USE_LIBCXX");
 
     let stdcppname = if target.contains("openbsd") {
-        if target.contains("sparc64") { "estdc++" } else { "c++" }
+        if target.contains("sparc64") {
+            "estdc++"
+        } else {
+            "c++"
+        }
     } else if target.contains("freebsd") {
         "c++"
     } else if target.contains("darwin") {

src/librustc_llvm/lib.rs

@@ -155,4 +155,12 @@ pub fn initialize_available_targets() {
         LLVMInitializeWebAssemblyTargetMC,
         LLVMInitializeWebAssemblyAsmPrinter
     );
+    init_target!(
+        llvm_component = "xtensa",
+        LLVMInitializeXtensaTargetInfo,
+        LLVMInitializeXtensaTarget,
+        LLVMInitializeXtensaTargetMC,
+        LLVMInitializeXtensaAsmPrinter,
+        LLVMInitializeXtensaAsmParser
+    );
 }

src/rustllvm/PassWrapper.cpp

@@ -251,6 +251,14 @@ 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                                                                \
@@ -262,6 +270,7 @@ void LLVMRustAddLastExtensionPasses(
   SUBTARGET_SPARC                                                              \
   SUBTARGET_HEXAGON                                                            \
   SUBTARGET_RISCV                                                              \
+  SUBTARGET_XTENSA                                                              \
 
 #define SUBTARGET(x)                                                           \
   namespace llvm {                                                             \