Rename sarg__ to sarg_t

cranelift/codegen/src/isa/aarch64/lower_inst.rs

@@ -2152,7 +2152,7 @@ pub(crate) fn lower_insn_to_regs<C: LowerCtx<I = Inst>>(
             panic!("x86-specific opcode in supposedly arch-neutral IR!");
         }
 
-        Opcode::DummySarg => unreachable!(),
+        Opcode::DummySargT => unreachable!(),
 
         Opcode::AvgRound => unimplemented!(),
         Opcode::Iabs => unimplemented!(),

cranelift/codegen/src/isa/x86/abi.rs

@@ -118,7 +118,7 @@ impl ArgAssigner for Args {
             let loc = ArgumentLoc::Stack(self.offset as i32);
             self.offset += size;
             debug_assert!(self.offset <= i32::MAX as u32);
-            return ArgAction::AssignAndChangeType(loc, types::SARG__);
+            return ArgAction::AssignAndChangeType(loc, types::SARG_T);
         }
 
         let ty = arg.value_type;