[clang] [AArch64][CodeGen] Fix wrong operand order when creating vcmla intrinsic (PR #65278)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

I don't think we need an end-to-end testcase; it should be sufficient to have testcases for clang->llvm IR and llvm IR->asm.  So should be fine as-is.

https://github.com/llvm/llvm-project/pull/65278