llvm-project

c317eda6 - [PowerPC][NFC] Update lowering STXVP to STXV in Oct word spilling (#143953)

[PowerPC][NFC] Update lowering STXVP to STXV in Oct word spilling (#143953) Simpliy handling for spilling of acc reg with stx by removing explicit register arithmetic and clean up code gen for register mapping used in stxvp spilling. Relanding: https://github.com/llvm/llvm-project/pull/142220