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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111622] New: [13 Regression] EVRP
 compile-time hog compiling risc-v insn-opinit.cc
Date: Thu, 28 Sep 2023 08:43:16 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.2.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111622

            Bug ID: 111622
           Summary: [13 Regression] EVRP compile-time hog compiling risc-v
                    insn-opinit.cc
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

Compiling insn-opinit.cc with a x86_64 GCC 13.2 host compiler targeting
riscv64-linux with -O2 shows

 tree Early VRP                     :  97.26 ( 77%)   0.01 (  1%)  97.28 ( =
76%)
 2908k (  0%)
 TOTAL                              : 127.13          1.06        128.21=20=
=20=20=20=20=20=20
  931M

and sofar unchanged on the branch head.

It's improved with GCC 14 where we instead have the worst passes being

 alias stmt walking                 :   5.89 ( 19%)   0.10 ( 10%)   6.01 ( =
19%)
 8531k (  1%)
 tree FRE                           :   4.73 ( 16%)   0.04 (  4%)   4.76 ( =
15%)
 4325k (  0%)

GCC 12 is fine as well.=