[clang] [clang] Better bitfield access units (PR #65742)

[Lu Weining via cfe-commits]

================
@@ -132,6 +132,7 @@ class LLVM_LIBRARY_VISIBILITY LoongArch64TargetInfo
       : LoongArchTargetInfo(Triple, Opts) {
     LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
     IntMaxType = Int64Type = SignedLong;
+    HasCheapUnalignedBitfieldAccess = true;
----------------
SixWeining wrote:

> you say set to true when -mno-unaligned-access, but I think you mean set to 
> false in that case?

Yes, I think it should be `false`. @wzssyqa 

https://github.com/llvm/llvm-project/pull/65742
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