See here:
https://github.com/hrydgard/ppsspp/issues/5925
Keep in mind, GPU operations are usually the slow thing on most devices in PPSSPP. So even if LLVM could bring optimization benefits (after a lot of work), it'd probably have a small (or no) impact on FPS. And it may not be for sure that it would give benefits.
-[Unknown]
https://github.com/hrydgard/ppsspp/issues/5925
Keep in mind, GPU operations are usually the slow thing on most devices in PPSSPP. So even if LLVM could bring optimization benefits (after a lot of work), it'd probably have a small (or no) impact on FPS. And it may not be for sure that it would give benefits.
-[Unknown]