[Bug tree-optimization/91257] [7/8/9/10 Regression] Compile-time and memory-hog hog

rguenth at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Thu Jul 25 13:25:00 GMT 2019


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91257

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2019-07-25
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Using -O2 doesn't help, and -O1 makes it even worse (236s, 5.9GB):

 tree PTA                           :  50.83 ( 22%)   0.63 ( 19%)  51.41 ( 21%)
  46076 kB (  1%)
 dominator optimization             :  18.76 (  8%)   0.23 (  7%)  19.02 (  8%)
 997246 kB ( 17%)
 tree CCP                           :  21.28 (  9%)   0.40 ( 12%)  21.71 (  9%)
    378 kB (  0%)
 tree FRE                           :  24.94 ( 11%)   0.20 (  6%)  25.23 ( 11%)
    609 kB (  0%)
 out of ssa                         :  38.49 ( 16%)   0.04 (  1%)  38.58 ( 16%)
    271 kB (  0%)

I'm going to poke a bit.


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