On Linux/x86_64,

31250baf81446aa4fc1b729e2fc5165a36005ebc is the first bad commit
commit 31250baf81446aa4fc1b729e2fc5165a36005ebc
Author: Paul Thomas <pa...@gcc.gnu.org>
Date:   Tue Dec 3 15:56:53 2024 +0000

    Fortran: Fix class transformational intrinsic calls [PR102689]

caused

FAIL: gfortran.dg/class_transformational_1.f90   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler 
error: in make_ssa_name_fn, at tree-ssanames.cc:355)
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess 
errors)
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -g  (internal compiler 
error: in make_ssa_name_fn, at tree-ssanames.cc:355)
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -g  (test for excess 
errors)

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r15-5897/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}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/class_transformational_1.f90 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/class_transformational_1.f90 
--target_board='unix{-m32\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me 
at haochen dot jiang at intel.com.)
(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.)

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