[PATCH] D57898: CodeGen: Fix PR40605: split constant structures generated by -ftrivial-auto-var-init when emitting initializators

[Alexander Potapenko via Phabricator via cfe-commits]

glider added a comment.

This patch shaved off 2.5% of performance slowdown on https://github.com/kamalmarhubi/linux-ipc-benchmarks/blob/master/af_inet_loopback.c on a kernel built in pattern-initialization mode.
The .rodata size went down by only 12K (0.5%, since we now split only structures smaller than 64 bytes)
The .text size went down by 19K (0.4%)


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  https://reviews.llvm.org/D57898/new/

https://reviews.llvm.org/D57898