Enable Xtensa codegen for rustc_codegen_gcc

* Updates uses of object::Architecture within the compiler

Author: MabezDev

compiler/rustc_codegen_gcc/src/asm.rs

@@ -638,6 +638,9 @@ fn reg_to_gcc(reg: InlineAsmRegOrRegClass) -> ConstraintOrRegister {
             InlineAsmRegClass::Wasm(WasmInlineAsmRegClass::local) => "r",
             InlineAsmRegClass::S390x(S390xInlineAsmRegClass::reg) => "r",
             InlineAsmRegClass::S390x(S390xInlineAsmRegClass::freg) => "f",
+            InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::reg) => unimplemented!(),
+            InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::freg) => unimplemented!(),
+            InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::breg) => unimplemented!(),
             InlineAsmRegClass::Err => unreachable!(),
         }
     };
@@ -707,6 +710,9 @@ fn dummy_output_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, reg: InlineAsmRegCl
         },
         InlineAsmRegClass::S390x(S390xInlineAsmRegClass::reg) => cx.type_i32(),
         InlineAsmRegClass::S390x(S390xInlineAsmRegClass::freg) => cx.type_f64(),
+        InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::reg) => cx.type_i32(),
+        InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::freg) => cx.type_f32(),
+        InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::breg) => cx.type_i8(), // FIXME: should this be i1?
         InlineAsmRegClass::Err => unreachable!(),
     }
 }
@@ -863,7 +869,10 @@ fn modifier_to_gcc(arch: InlineAsmArch, reg: InlineAsmRegClass, modifier: Option
         InlineAsmRegClass::M68k(_) => None,
         InlineAsmRegClass::SpirV(SpirVInlineAsmRegClass::reg) => {
             bug!("LLVM backend does not support SPIR-V")
-        }
+        },
+        InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::reg) => unimplemented!(),
+        InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::freg) => unimplemented!(),
+        InlineAsmRegClass::Xtensa(XtensaInlineAsmRegClass::breg) => unimplemented!(),
         InlineAsmRegClass::Err => unreachable!(),
     }
 }

compiler/rustc_codegen_ssa/src/back/metadata.rs

@@ -174,6 +174,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
         "avr" => Architecture::Avr,
         "msp430" => Architecture::Msp430,
         "hexagon" => Architecture::Hexagon,
+        "xtensa" => Architecture::Xtensa,
         "bpf" => Architecture::Bpf,
         "loongarch64" => Architecture::LoongArch64,
         // Unsupported architecture.