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From: "patrick at rivosinc dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110849] New: [14 Regression] XPASS in
 gcc.dg/unroll-7.c
Date: Fri, 28 Jul 2023 22:00:20 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
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X-Bugzilla-Who: patrick at rivosinc dot com
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110849

            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=3Dgcc.git;a=3Dcommit;h=3Da7d4310aed539b04345894e=
bafb49ca364780653
"Fix profile update after RTL unrolling"

Tested using make-report in https://github.com/riscv-collab/riscv-gnu-toolc=
hain
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 :)=