https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111428
Bug ID: 111428
Summary: RISC-V vector: Flaky segfault in
{min|max}val_char_{1|2}.f90
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: patrick at rivosinc dot com
Target Milestone: ---
Created attachment 55906
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55906&action=edit
Excerpt from the debug log
Failures:
FAIL: gfortran.dg/minval_char_1.f90 -O3 -g execution test
FAIL: gfortran.dg/minval_char_1.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
FAIL: gfortran.dg/minval_char_2.f90 -O3 -g execution test
FAIL: gfortran.dg/minval_char_2.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
FAIL: gfortran.dg/maxval_char_1.f90 -O3 -g execution test
FAIL: gfortran.dg/maxval_char_1.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
FAIL: gfortran.dg/maxval_char_2.f90 -O3 -g execution test
FAIL: gfortran.dg/maxval_char_2.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
Observed on:
rv64gcv_zvbb_zvbc_zvkg_zvkn_zvknc_zvkned_zvkng_zvknha_zvknhb_zvks_zvksc_zvksed_zvksg_zvksh_zvkt-lp64d
rv64gcv-lp64d
rv64imafdcv_zicond_zawrs_zbc_zvkng_zvksg_zvbb_zvbc_zicsr_zba_zbb_zbs_zicbom_zicbop_zicboz_zfhmin_zkt-lp64d
Seems to only occur on rv64 glibc targets with the v extension enabled.
Known to pass: r14-3834-gd05aac047e0
Known to fail: r14-3840-g88a0a883960
Replicated locally using
https://github.com/patrick-rivos/riscv-gnu-toolchain/tree/29d071a8eec4603ff5fe4fe21d7e4ffa24f705f0
git submodule update --init gcc
cd gcc && git checkout 316d57da5bb9205b946afc56d78582fee874e4b5
cd .. && mkdir build && cd build
../configure --prefix=$(pwd) --with-arch=rv64gcv --with-abi=lp64
make report-linux -j32
There was previously flaky behavior with these testcases, but it's been
resolved for other targets:
https://gcc.gnu.org/legacy-ml/gcc-patches/2017-12/msg00807.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83379
