Commits on Apr 27, 2023

1. Support RISC-V unaligned-scalar-mem target feature …

   This adds `unaligned-scalar-mem` as an allowed RISC-V target feature.
   Some RISC-V cores support unaligned access to memory without trapping.
   On such cores, the compiler could significantly improve code-size and
   performance when using functions like core::ptr::read_unaligned<u32>
   by emitting a single load or store instruction with an unaligned
   address, rather than a long sequence of byte load/store/bitmanip
   instructions.
   
   Enabling the `unaligned-scalar-mem` target feature allows LLVM to do
   this optimization.
   
   Fixes rust-lang#110883

   

   korran committed Apr 27, 2023
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