https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106186
Bug ID: 106186
Summary: [13 regression] Recent change causing target
regressions for uninitialized objects
Product: gcc
Version: 13.0
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: ---
This change:
commit 4e82205b68024f5c1a9006fe2b62e1a0fa7f1245
Author: Aldy Hernandez <[email protected]>
Date: Fri Jul 1 13:20:42 2022 +0200
Integrate nonzero bits with irange.
The nonzero bits and integer ranges compliment each other quite well,
and it only makes sense to make the mask a first class citizen in the
irange. We do a half assed job of keeping ranges and nonzero bits
somewhat in sync in SSA_NAME_RANGE_INFO, and the goal has always
been to integrate them properly. This patch does that, in preparation
for streaming out full-resolution iranges between passes (think
SSA_NAME_RANGE_INFO).
[ ... ]
Has caused several targets to start failing this test:
Tests that now fail, but worked before (1 tests):
cris-sim: gcc.dg/auto-init-uninit-4.c (test for excess errors)
>From the gcc.log file:
Excess errors:
/home/jlaw/test/gcc/gcc/testsuite/gcc.dg/uninit-4.c:49:10: warning: 'rprio' may
be used uninitialized [-Wmaybe-uninitialized]
This should be visible with just a cross compiler.
Testcase not explicitly included as it's obvious this is gcc.dg/uninit-4.c in
the testsuite.
