assmbler_x86.hpp has 940 -Wconversion warnings for functions that pass int to emit_int8() that takes a uint8_t.  Some callers also have sign extension which make it look out of range when it isn't really.

Sample:
src/hotspot/cpu/x86/assembler_x86.cpp: In member function 'void Assembler::rorxl(Register, Address, int)':
src/hotspot/cpu/x86/assembler_x86.cpp:13779:13: warning: conversion from 'int' to 'uint8_t' {aka 'unsigned char'} may change value [-Wconversion]
13779 |   emit_int8(imm8);
      |             ^~~~
src/hotspot/cpu/x86/assembler_x86.cpp: In member function 'void Assembler::rorxq(Register, Register, int)':
src/hotspot/cpu/x86/assembler_x86.cpp:13786:41: warning: conversion from 'int' to 'uint8_t' {aka 'unsigned char'} may change value [-Wconversion]
13786 |   emit_int24((unsigned char)0xF0, (0xC0 | encode), imm8);
      |                                   ~~~~~~^~~~~~~~~