[r17-2050 Regression] FAIL: libgomp.oacc-fortran/update-dt-array.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable -O3 -g (test for excess errors) on Linux/x86_64

Haochen Jiang via Gcc-regression <[email protected]> Thu, 2 Jul 2026 19:56:03 +0800
Newsgroups gmane.comp.gcc.regression,gmane.comp.gcc.patches
Message-ID <[email protected]>
On Linux/x86_64,

4e0964279b73d3af5b085f731c87c200b7564db4 is the first bad commit
commit 4e0964279b73d3af5b085f731c87c200b7564db4
Author: Alfie Richards <[email protected]>
Date:   Wed May 20 14:50:25 2026 +0000

    vect: Introduce LOOP_VINFO_IV_INCREMENT

caused

FAIL: libgomp.oacc-fortran/optional-update-device.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/optional-update-device.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/optional-update-device.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/optional-update-device.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/optional-update-host.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/optional-update-host.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/optional-update-host.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/optional-update-host.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/parallel-loop-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/parallel-loop-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/parallel-loop-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/parallel-loop-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions   at line 108 (test for warnings, line 105)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions   at line 150 (test for warnings, line 147)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions   at line 53 (test for warnings, line 50)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions   at line 84 (test for warnings, line 81)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g   at line 108 (test for warnings, line 105)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g   at line 150 (test for warnings, line 147)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g   at line 53 (test for warnings, line 50)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g   at line 84 (test for warnings, line 81)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/privatized-ref-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/subarrays-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/subarrays-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/subarrays-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/subarrays-1.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/subarrays-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/subarrays-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/subarrays-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/subarrays-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/update-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/update-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/update-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/update-2.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)
FAIL: libgomp.oacc-fortran/update-dt-array.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/update-dt-array.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: libgomp.oacc-fortran/update-dt-array.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (internal compiler error: Segmentation fault)
FAIL: libgomp.oacc-fortran/update-dt-array.f90 -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -foffload=disable  -O3 -g  (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-2050/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/optional-update-device.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/optional-update-device.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/optional-update-host.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/optional-update-host.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/parallel-loop-1.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/parallel-loop-1.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/privatized-ref-2.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/privatized-ref-2.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/subarrays-1.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/subarrays-1.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/subarrays-2.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/subarrays-2.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/update-2.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/update-2.f90 --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/update-dt-array.f90 --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check RUNTESTFLAGS="fortran.exp=libgomp.oacc-fortran/update-dt-array.f90 --target_board='unix{-m64\ -march=cascadelake}'"

(Please directly reply to this email for question about this report.)
(If you met problems with cascadelake related, disabling AVX512F in command line might save that.)
(However, please make sure that there is no potential problems with AVX512.)