[PATCH] D155470: [AArch64] LSLFast to fold onto base address by default

[Allen zhong via Phabricator via llvm-commits]

Allen added a comment.

Agree with @dmgreen, fold small shift into addressing operands don't create the instruction latency and reduce register usage, GCC has done this folding, https://gcc.godbolt.org/z/68zEq8x81


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