[Bug tree-optimization/66388] New: Test gcc.target/i386/pr49781-1.c failed because of recent scev overflow patches.

[Bug tree-optimization/66388] New: Test gcc.target/i386/pr49781-1.c failed because of recent scev overflow patches.

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66388

            Bug ID: 66388
           Summary: Test gcc.target/i386/pr49781-1.c failed because of
                    recent scev overflow patches.
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amker at gcc dot gnu.org
  Target Milestone: ---

gcc.target/i386/pr49781-1.c failed because of recent scev overflow patches at
revisions 224009/224020.  Seems IVO made worse choice with more IVs recognized.
 I will investigate this issue.

FAIL: gcc.target/i386/pr49781-1.c scan-assembler-not lea[lq]?[
\t]\\((%|)r[a-z0-9]*

[Bug tree-optimization/66388] [6 Regression] Test gcc.target/i386/pr49781-1.c failed because of recent scev overflow patches.

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66388

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-06-03
   Target Milestone|---                         |6.0
            Summary|Test                        |[6 Regression] Test
                   |gcc.target/i386/pr49781-1.c |gcc.target/i386/pr49781-1.c
                   |failed because of recent    |failed because of recent
                   |scev overflow patches.      |scev overflow patches.
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

[Bug tree-optimization/66388] [6 Regression] Test gcc.target/i386/pr49781-1.c failed because of recent scev overflow patches.

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66388

--- Comment #2 from amker at gcc dot gnu.org ---
Had a patch, will polish it after annual leave.

[Bug tree-optimization/66388] [6 Regression] Test gcc.target/i386/pr49781-1.c failed because of recent scev overflow patches.

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66388

--- Comment #3 from amker at gcc dot gnu.org ---
Author: amker
Date: Thu Sep 17 03:40:18 2015
New Revision: 227844

URL: https://gcc.gnu.org/viewcvs?rev=227844&root=gcc&view=rev
Log:

        PR tree-optimization/66388
        * tree-ssa-loop-ivopts.c (struct iv, iv_cand, ivopts_data): New
        fields.
        (dump_iv): Dump no_overflow information.
        (alloc_iv): Initialize new field for struct iv.
        (mark_bivs): Count number of no_overflow bivs.
        (find_deriving_biv_for_expr, record_biv_for_address_use): New
        functions.
        (idx_find_step): Call new functions above.
        (add_candidate_1, add_candidate): New paramter.
        (add_iv_candidate_for_biv): Add sizetype cand for BIV.
        (get_computation_aff): Simplify convertion of cand for BIV.
        (get_computation_cost_at): Step cand's base if necessary.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c