pcwang-thead added inline comments.
================
Comment at: clang/include/clang/Basic/riscv_vector.td:1565
+ unsigned long __rv = 0;
+ __asm__ __volatile__ ("csrr\t%0, vlenb" : "=r"(__rv) : : "memory");
+ return __rv;
----------------
Inline assembly may not be elegant since it can't be optimized in many ways. We
can eliminate some redundant reads of vlenb currently(done in D125564). So I
think we may add a builtin function and lower it to `llvm.read_register`?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D141032/new/
https://reviews.llvm.org/D141032
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