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

[Kostya Serebryany]

> > With this patch, ASan instrumentation pass will only instrument non promotable allocas, giving us a speedup of 39% on a collection of benchmarks with -O0

> 


I wonder, what if we apply this only to those allocas that are indexed with constants?
I.e. only if we can statically prove the correctness of access.
See also Dmitry's http://reviews.llvm.org/D7583


http://reviews.llvm.org/D7741

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