https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109721
Bug ID: 109721
Summary: [14 Regression] predcom-2 fails after recent changes
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: law at gcc dot gnu.org
Target Milestone: ---
arc-elf target.
FAIL: gcc.dg/tree-ssa/predcom-2.c scan-tree-dump-times pcom "Unrolling 2
times." 2
Bisection points to:
f385252b2336a4a57a30fddf82e558c73bcc85cc is the first bad commit
commit f385252b2336a4a57a30fddf82e558c73bcc85cc
Author: Richard Biener <rguent...@suse.de>
Date: Tue May 2 10:34:48 2023 +0200
tree-optimization/109672 - properly check emulated plus during vect
The following refactors the check for emulated vector support for
the cases of plus, minus and negate. In the PR we end up with
a SImode plus, supported by the target but emulated and in this
context fail to verify we are dealing with exactly word_mode.
PR tree-optimization/109672
* tree-vect-stmts.cc (vectorizable_operation): For plus,
minus and negate always check the vector mode is word mode.
It should be visible with a cross-compiler. No need for a full toolchain
stack.
