[llvm] [RISCV] Support isel for Zacas for 2*XLen types. (PR #77814)
Craig Topper via llvm-commits
llvm-commits at lists.llvm.org
Tue Jan 16 09:48:50 PST 2024
topperc wrote:
> This change isn't OK - we shouldn't add any new expansions of Load to CmpXChg. Unless there is an atomic 128-bit load operation also available in RISC-V, we cannot use amocas.q for implementing atomics.
There is no 128-bit atomic load for RISC-V currently defined
https://github.com/llvm/llvm-project/pull/77814
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