x...@google.com (Rong Xu) writes: > After some off-line discussion, we decided to use a more general approach > to control the printing of optimization messages/warnings. We will > introduce a new option -fopt-info: > * fopt-info=0 or fno-opt-info: no message will be emitted. > * fopt-info or fopt-info=1: emit important warnings and optimization > messages with large performance impact. > * fopt-info=2: warnings and optimization messages targeting power users. > * fopt-info=3: informational messages for compiler developers.
It would be interested to have some warnings about missing SRA opportunities in =1 or =2. I found that sometimes fixing those can give a large speedup. Right now a common case that prevents SRA on structure field is simply a memset or memcpy. -Andi -- a...@linux.intel.com -- Speaking for myself only
