Rollup merge of rust-lang#111332 - loongarch-rs:inline-asm, r=Amanieu

Improve inline asm for LoongArch

This PR is a sub-part of rust-lang#111235, to improve inline asm for LoongArch.

r? `@Amanieu`

Author: JohnTitor

compiler/rustc_codegen_llvm/src/asm.rs

@@ -236,7 +236,18 @@ impl<'ll, 'tcx> AsmBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                 InlineAsmArch::Nvptx64 => {}
                 InlineAsmArch::PowerPC | InlineAsmArch::PowerPC64 => {}
                 InlineAsmArch::Hexagon => {}
-                InlineAsmArch::LoongArch64 => {}
+                InlineAsmArch::LoongArch64 => {
+                    constraints.extend_from_slice(&[
+                        "~{$fcc0}".to_string(),
+                        "~{$fcc1}".to_string(),
+                        "~{$fcc2}".to_string(),
+                        "~{$fcc3}".to_string(),
+                        "~{$fcc4}".to_string(),
+                        "~{$fcc5}".to_string(),
+                        "~{$fcc6}".to_string(),
+                        "~{$fcc7}".to_string(),
+                    ]);
+                }
                 InlineAsmArch::Mips | InlineAsmArch::Mips64 => {}
                 InlineAsmArch::S390x => {
                     constraints.push("~{cc}".to_string());

compiler/rustc_target/src/asm/loongarch.rs

@@ -33,12 +33,11 @@ impl LoongArchInlineAsmRegClass {
 
     pub fn supported_types(
         self,
-        arch: InlineAsmArch,
+        _arch: InlineAsmArch,
     ) -> &'static [(InlineAsmType, Option<Symbol>)] {
-        match (self, arch) {
-            (Self::reg, InlineAsmArch::LoongArch64) => types! { _: I8, I16, I32, I64, F32, F64; },
-            (Self::reg, _) => types! { _: I8, I16, I32, F32; },
-            (Self::freg, _) => types! { _: F32, F64; },
+        match self {
+            Self::reg => types! { _: I8, I16, I32, I64, F32, F64; },
+            Self::freg => types! { _: F32, F64; },
         }
     }
 }