https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110756
Bug ID: 110756
Summary: [14 Regression] commit g:92d1425ca78 causes failures
in g++.dg/gomp/pr58567.C
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: thiago.bauermann at linaro dot org
CC: ppalka at gcc dot gnu.org
Target Milestone: ---
Our CI detected that commit g:92d1425ca780 "c++: redundant targ coercion for
var/alias tmpls" caused these testsuite failures:
Running g++:g++.dg/gomp/gomp.exp ...
FAIL: g++.dg/gomp/pr58567.C -std=c++14 (test for excess errors)
FAIL: g++.dg/gomp/pr58567.C -std=c++17 (test for excess errors)
FAIL: g++.dg/gomp/pr58567.C -std=c++20 (test for excess errors)
FAIL: g++.dg/gomp/pr58567.C -std=c++98 (test for excess errors)
I confirmed that the problem is still present in trunk as of commit
g:b50a851eef4b "i386: Double-word sign-extension missed-optimization
[PR110717]" from today.
I also confirmed that reverting the mentioned commit from trunk fixes the test
failures. Reproduced the problem on Ubuntu 22.04, on both aarch64-linux and
x86_64-linux.
The relevant part of g++.log is:
Executing on host:
/home/thiago.bauermann/.cache/builds/gcc-native/gcc/testsuite/g++/../../xg++
-B/home/thiago.bauermann/.cache/builds/gcc-native/gcc/testsuite/g++/../../
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C
-fdiagnostics-plain-output -nostdinc++
-I/home/thiago.bauermann/.cache/builds/gcc-native/aarch64-unknown-linux-gnu/libstdc++-v3/include/aarch64-unknown-linux-gnu
-I/home/thiago.bauermann/.cache/builds/gcc-native/aarch64-unknown-linux-gnu/libstdc++-v3/include
-I/home/thiago.bauermann/src/gcc/libstdc++-v3/libsupc++
-I/home/thiago.bauermann/src/gcc/libstdc++-v3/include/backward
-I/home/thiago.bauermann/src/gcc/libstdc++-v3/testsuite/util -fmessage-length=0
-std=c++20 -fopenmp -S -o pr58567.s (timeout = 300)
spawn -ignore SIGHUP
/home/thiago.bauermann/.cache/builds/gcc-native/gcc/testsuite/g++/../../xg++
-B/home/thiago.bauermann/.cache/builds/gcc-native/gcc/testsuite/g++/../../
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C
-fdiagnostics-plain-output -nostdinc++
-I/home/thiago.bauermann/.cache/builds/gcc-native/aarch64-unknown-linux-gnu/libstdc++-v3/include/aarch64-unknown-linux-gnu
-I/home/thiago.bauermann/.cache/builds/gcc-native/aarch64-unknown-linux-gnu/libstdc++-v3/include
-I/home/thiago.bauermann/src/gcc/libstdc++-v3/libsupc++
-I/home/thiago.bauermann/src/gcc/libstdc++-v3/include/backward
-I/home/thiago.bauermann/src/gcc/libstdc++-v3/testsuite/util -fmessage-length=0
-std=c++20 -fopenmp -S -o pr58567.s
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C: In
instantiation of 'void foo() [with T = int]':
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C:14:11:
required from here
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C:8:22: error:
'int' is not a class, struct, or union type
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C:8:3: error:
invalid type for iteration variable 'i'
compiler exited with status 1
PASS: g++.dg/gomp/pr58567.C -std=c++20 (test for errors, line 8)
FAIL: g++.dg/gomp/pr58567.C -std=c++20 (test for excess errors)
Excess errors:
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/gomp/pr58567.C:8:3: error:
invalid type for iteration variable 'i'
Tested with:
$ ~/src/gcc/configure \
--disable-bootstrap \
--disable-multilib \
&& make -j 8 \
&& make -C gcc check-c++ RUNTESTFLAGS=g++.dg/gomp/gomp.exp
