rustc_codegen_llvm: Reorder by arch in update_target_reliable_float_cfg

This commit reorders certain match clauses in
`update_target_reliable_float_cfg` by the architecture when
there's no problems reordering it.

Author: a4lg

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -389,15 +389,15 @@ fn update_target_reliable_float_cfg(sess: &Session, cfg: &mut TargetConfig) {
     };
 
     cfg.has_reliable_f128 = match (target_arch, target_os) {
+        // Unsupported https://github.com/llvm/llvm-project/issues/121122
+        (Arch::AmdGpu, _) => false,
         // Unsupported <https://github.com/llvm/llvm-project/issues/94434>
         (Arch::Arm64EC, _) => false,
         // Selection bug <https://github.com/llvm/llvm-project/issues/96432> (fixed in LLVM 20.1.0)
         (Arch::Mips64 | Arch::Mips64r6, _) if version < (20, 1, 0) => false,
         // Selection bug <https://github.com/llvm/llvm-project/issues/95471>. This issue is closed
         // but basic math still does not work.
         (Arch::Nvptx64, _) => false,
-        // Unsupported https://github.com/llvm/llvm-project/issues/121122
-        (Arch::AmdGpu, _) => false,
         // ABI bugs <https://github.com/rust-lang/rust/issues/125109> et al. (full
         // list at <https://github.com/rust-lang/rust/issues/116909>)
         (Arch::PowerPC | Arch::PowerPC64, _) => false,