Commits on Mar 2, 2024

1. [LoongArch] Override LoongArchTargetLowering::getExtendForAtomicCmpSw… …

   …apArg
   
   This patch aims to solve Firefox issue:
   https://bugzilla.mozilla.org/show_bug.cgi?id=1882301
   
   Similar to 616289e. Currently LoongArch uses an ll.[wd]/sc.[wd]
   loop for ATOMIC_CMP_XCHG. Because the comparison in the loop is
   full-width (i.e. the `bne` instruction), we must sign extend the input
   comparsion argument.
   
   Note that LoongArch ISA manual V1.1 has introduced compare-and-swap
   instructions. We would change the implementation (return `ANY_EXTEND`)
   when we support them.

   

   SixWeining committed Mar 2, 2024
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