https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110083
Bug ID: 110083
Summary: [14 Regression] ICEs for testcase on
fp-int-convert*timode after r14-1466-g3635e8c67e1
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: haochen.jiang at intel dot com
Target Milestone: ---
Currently we get testcase regressions following:
https://gcc.gnu.org/pipermail/gcc-regression/2023-June/077808.html
I checked my bisect script, at least for fp-int-convert-timode.c, it points to
commit r14-1466-g3635e8c67e1 when using -march=cascadelake.
Actually, it will cause ICEs when using -msse4 and higher ISA set.
I reproduce it by:
/export/users/haochenj/env/build_no_bootstrap_master/gcc/xgcc
-B/export/users/haochenj/env/build_no_bootstrap_master/gcc/
/export/users/haochenj/src/gcc/master/gcc/testsuite/gcc.dg/torture/fp-int-convert-timode.c
-m64 -msse4 -fdiagnostics-plain-output -O2 -lm -o ./fp-int-convert-timode.exe
with backtrace:
during RTL pass: cse2
/export/users/haochenj/src/gcc/master/gcc/testsuite/gcc.dg/torture/fp-int-convert-timode.c:
In function ‘main’:
/export/users/haochenj/src/gcc/master/gcc/testsuite/gcc.dg/torture/fp-int-convert-timode.c:22:1:
internal compiler error: in as_a, at machmode.h:381
0xcc405f scalar_mode as_a<scalar_mode>(machine_mode)
/export/users/haochenj/src/gcc/master/./gcc/machmode.h:381
0xf9eb33 wi::int_traits<std::pair<rtx_def*, machine_mode>
>::get_precision(std::pair<rtx_def*, machine_mode> const&)
/export/users/haochenj/src/gcc/master/./gcc/rtl.h:2282
0xfb7fce unsigned int wi::get_precision<std::pair<rtx_def*, machine_mode>
>(std::pair<rtx_def*, machine_mode> const&)
/export/users/haochenj/src/gcc/master/./gcc/wide-int.h:1795
0xfb21aa wide_int_ref_storage<false,
false>::wide_int_ref_storage<std::pair<rtx_def*, machine_mode>
>(std::pair<rtx_def*, machine_mode> const&)
/export/users/haochenj/src/gcc/master/./gcc/wide-int.h:1029
0xfa7c7c generic_wide_int<wide_int_ref_storage<false, false>
>::generic_wide_int<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*,
machine_mode> const&)
/export/users/haochenj/src/gcc/master/./gcc/wide-int.h:787
0x103f74b poly_int<1u, generic_wide_int<wide_int_ref_storage<false, false> >
>::poly_int<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*,
machine_mode> const&)
/export/users/haochenj/src/gcc/master/./gcc/poly-int.h:670
0x103ef15 wi::to_poly_wide(rtx_def const*, machine_mode)
/export/users/haochenj/src/gcc/master/./gcc/rtl.h:2382
0x1558c20 neg_poly_int_rtx
/export/users/haochenj/src/gcc/master/./gcc/simplify-rtx.cc:57
0x156521c simplify_context::simplify_binary_operation_1(rtx_code, machine_mode,
rtx_def*, rtx_def*, rtx_def*, rtx_def*)
/export/users/haochenj/src/gcc/master/./gcc/simplify-rtx.cc:3171
0x1562b50 simplify_context::simplify_binary_operation(rtx_code, machine_mode,
rtx_def*, rtx_def*)
/export/users/haochenj/src/gcc/master/./gcc/simplify-rtx.cc:2641
0xfcbd31 simplify_binary_operation(rtx_code, machine_mode, rtx_def*, rtx_def*)
/export/users/haochenj/src/gcc/master/./gcc/rtl.h:3485
0x15730be simplify_const_relational_operation(rtx_code, machine_mode, rtx_def*,
rtx_def*)
/export/users/haochenj/src/gcc/master/./gcc/simplify-rtx.cc:6173
0x1571a01 simplify_context::simplify_relational_operation(rtx_code,
machine_mode, machine_mode, rtx_def*, rtx_def*)
/export/users/haochenj/src/gcc/master/./gcc/simplify-rtx.cc:5759
0xf0607d simplify_relational_operation(rtx_code, machine_mode, machine_mode,
rtx_def*, rtx_def*)
/export/users/haochenj/src/gcc/master/./gcc/rtl.h:3500
0x29418dd fold_rtx
/export/users/haochenj/src/gcc/master/./gcc/cse.cc:3487
0x2940e75 fold_rtx
/export/users/haochenj/src/gcc/master/./gcc/cse.cc:3227
0x29443e9 cse_insn
/export/users/haochenj/src/gcc/master/./gcc/cse.cc:4667
0x29498ce cse_extended_basic_block
/export/users/haochenj/src/gcc/master/./gcc/cse.cc:6566
0x2949ddd cse_main
/export/users/haochenj/src/gcc/master/./gcc/cse.cc:6711
0x294c0c6 rest_of_handle_cse2
/export/users/haochenj/src/gcc/master/./gcc/cse.cc:7609
