[Bug tree-optimization/110849] New: [14 Regression] XPASS in gcc.dg/unroll-7.c

[Bug tree-optimization/110849] New: [14 Regression] XPASS in gcc.dg/unroll-7.c

[patrick at rivosinc dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110849

            Bug ID: 110849
           Summary: [14 Regression] XPASS in gcc.dg/unroll-7.c
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: patrick at rivosinc dot com
  Target Milestone: ---

New XPASS on trunk:
XPASS: gcc.dg/unroll-7.c scan-rtl-dump-not loop2_unroll "Invalid sum"

Bisected to
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=a7d4310aed539b04345894ebafb49ca364780653
"Fix profile update after RTL unrolling"

Tested using make-report in https://github.com/riscv-collab/riscv-gnu-toolchain
with tip-of-tree gcc

Confirmed XPASS failure on:
linux rv32gc ilp32d medlow
linux rv64gc lp64d medlow
newlib rv32gc ilp32d medlow
newlib rv64gc lp64d medlow

It doesn't seem like it would be a target-specific issue, but the patch was
regtested on x86 before being committed.
https://inbox.sourceware.org/gcc-patches/ZMK34wjgBF4MnGD7@kam.mff.cuni.cz/T/#u

I'm guessing on the component so feel free to update the report if it's not a
tree-optimization issue :)

[Bug tree-optimization/110849] [14 Regression] XPASS in gcc.dg/unroll-7.c

[patrick at rivosinc dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110849

Patrick O'Neill <patrick at rivosinc dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jh at suse dot cz

--- Comment #1 from Patrick O'Neill <patrick at rivosinc dot com> ---
+cc Jan Hubicka in case you have any insight here :)

[Bug tree-optimization/110849] [14 Regression] XPASS in gcc.dg/unroll-7.c

[patrick at rivosinc dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110849

Patrick O'Neill <patrick at rivosinc dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #2 from Patrick O'Neill <patrick at rivosinc dot com> ---
Tested hash 9f5372707f920fcf672eca76243c0d6de460f787 and issue has been
resolved.

Likely fixed by hash 88618fa0211d77d91b70f7af9b02e08a34b57912.