use bit_cast

Author: expipiplus1

source/slang/slang-ir.h

@@ -7,16 +7,14 @@
 // similar in spirit to LLVM (but much simpler).
 //
 
-#if defined(__cpp_lib_bit_cast)
-#include <bit>
-#endif
 #include "../compiler-core/slang-source-loc.h"
 #include "../compiler-core/slang-source-map.h"
 #include "../core/slang-basic.h"
 #include "../core/slang-memory-arena.h"
 #include "slang-container-pool.h"
 #include "slang-type-system-shared.h"
 
+#include <bit>
 #include <functional>
 
 namespace Slang
@@ -105,11 +103,7 @@ enum IRMemoryOrder
 
 inline int32_t operator&(const IROpMask m, const IROp o)
 {
-#if defined(__cpp_lib_bit_cast)
     return std::bit_cast<int32_t>(m) & std::bit_cast<int32_t>(o);
-#else
-    return (int32_t)m & (int32_t)o;
-#endif
 }
 
 inline int32_t operator&(const IROp o, const IROpMask m)