[Bug tree-optimization/96665] New: [11 regression] new FAILs for gcc.dg/strlenopt-55.c after r11-2709

[Bug tree-optimization/96665] New: [11 regression] new FAILs for gcc.dg/strlenopt-55.c after r11-2709

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96665

            Bug ID: 96665
           Summary: [11 regression] new FAILs for gcc.dg/strlenopt-55.c
                    after r11-2709
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

g:866626efd749ed3e2b7014e88e4340b5a4c73560, r11-2709


Executing on host: /home/seurer/gcc/git/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/git/build/gcc-test/gcc/
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/strlenopt-55.c   
-fdiagnostics-plain-output   -O1 -Wall -fdump-tree-gimple -fdump-tree-optimized
-S -o strlenopt-55.s    (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/git/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/git/build/gcc-test/gcc/
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/strlenopt-55.c
-fdiagnostics-plain-output -O1 -Wall -fdump-tree-gimple -fdump-tree-optimized
-S -o strlenopt-55.s
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/strlenopt-55.c:128:3:
warning: unsigned conversion from 'int' to 'short unsigned int' changes value
from '65536' to '0' [-Woverflow]
PASS: gcc.dg/strlenopt-55.c  (test for warnings, line 128)
Executing on host: /home/seurer/gcc/git/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/git/build/gcc-test/gcc/ exceptions_enabled90025.cc   
-fdiagnostics-plain-output  -S -o exceptions_enabled90025.s    (timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/git/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/git/build/gcc-test/gcc/ exceptions_enabled90025.cc
-fdiagnostics-plain-output -S -o exceptions_enabled90025.s
PASS: gcc.dg/strlenopt-55.c (test for excess errors)
PASS: gcc.dg/strlenopt-55.c scan-tree-dump-times gimple "strlen1" 0
gcc.dg/strlenopt-55.c: pattern found 3 times
FAIL: gcc.dg/strlenopt-55.c scan-tree-dump-times gimple "memcmp" 0
PASS: gcc.dg/strlenopt-55.c scan-tree-dump-times gimple "strcmp" 0
gcc.dg/strlenopt-55.c: pattern found 3 times
FAIL: gcc.dg/strlenopt-55.c scan-tree-dump-times optimized
"call_in_true_branch_not_eliminated" 0
testcase /home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/dg.exp completed in
0 seconds

                === gcc Summary ===

# of expected passes            4
# of unexpected failures        2

[Bug tree-optimization/96665] [11 regression] new FAILs for gcc.dg/strlenopt-55.c after r11-2709

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96665

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2020-08-18
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
                 CC|                            |marxin at gcc dot gnu.org,
                   |                            |msebor at gcc dot gnu.org

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
@seurer: Please add author of the revision to CC next time.

[Bug tree-optimization/96665] [11 regression] new FAILs for gcc.dg/strlenopt-55.c after r11-2709

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96665

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization, patch
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |msebor at gcc dot gnu.org

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch I plan to commit:
https://gcc.gnu.org/pipermail/gcc-patches/2020-August/552161.html

[Bug tree-optimization/96665] [11 regression] new FAILs for gcc.dg/strlenopt-55.c after r11-2709

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96665

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:

https://gcc.gnu.org/g:d367f5fcb579d21c3093cf5c464f5787fe584a1d

commit r11-2743-gd367f5fcb579d21c3093cf5c464f5787fe584a1d
Author: Martin Sebor <msebor@redhat.com>
Date:   Tue Aug 18 12:57:18 2020 -0600

    PR middle-end/96665 - memcmp of a constant string not folded

    Related:
    PR middle-end/78257 - missing memcmp optimization with constant arrays

    gcc/ChangeLog:

            PR middle-end/96665
            PR middle-end/78257
            * expr.c (convert_to_bytes): Replace statically allocated buffer
with
            a dynamically allocated one of sufficient size.

    gcc/testsuite/ChangeLog:

            PR middle-end/96665
            PR middle-end/78257
            * gcc.dg/memcmp-5.c: New test.

[Bug tree-optimization/96665] [11 regression] memcmp of a constant string not folded

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96665

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED
            Summary|[11 regression] new FAILs   |[11 regression] memcmp of a
                   |for gcc.dg/strlenopt-55.c   |constant string not folded
                   |after r11-2709              |
   Target Milestone|---                         |11.0

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r11-2743.