[PATCH] Skip promotable allocas to improve performance at -O0

[Dmitry Vyukov]

Smart people, while you are here I would like to ask you to look at:
http://reviews.llvm.org/D7583
It is somewhat similar to this change. I want to eliminate
instrumentation of locals within its lifetime (so it is not a
use-after-scope) and that is known to be inbounds (that is, direct
accesses, field accesses and array element accesses with constant
indices; so it is not a out-of-bounds).
By experimentation I found that both isGEPWithNoNotionalOverIndexing
and stripInBoundsConstantOffsets don't do what I want.
isGEPWithNoNotionalOverIndexing does not eliminate enough of
unnecessary instrumentation. While stripInBoundsConstantOffsets
eliminates a bit more than necessary.
Thanks in advance!


http://reviews.llvm.org/D7741

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/