https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117895
Bug ID: 117895
Summary: [15 regression] ICE in operand_subword_force
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: ebotcazou at gcc dot gnu.org, law at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.11
Between 20241129 (f93059c82e61d67bc550ba0e3bf915ab763b02c7) and
20241202 (a3e5fbcd055596e1496854326ffd17572e3ae42d), Solaris/SPARC bootstrap
broke building libgo:
libtool: compile: /var/gcc/regression/master/11.4-gcc/build/./gcc/gccgo
-B/var/gcc/regression/master/11.4-gcc/build/./gcc/
-B/vol/gcc/sparc-sun-solaris2.11/bin/ -B/vol/gcc/sparc-sun-solaris2.11/lib/
-isystem /vol/gcc/sparc-sun-solaris2.11/include -isystem
/vol/gcc/sparc-sun-solaris2.11/sys-include -fchecking=1 -g -O2 -I . -c
-fgo-pkgpath=hash/crc64
/vol/gcc/src/hg/master/local/libgo/go/hash/crc64/crc64.go -o hash/crc64.o
>/dev/null 2>&1
make: *** [Makefile:3055: hash/crc64.lo] Error 1
during RTL pass: expand
/vol/gcc/src/hg/master/local/libgo/go/hash/crc64/crc64.go: In function
‘hash/crc64.buildSlicing8Tables’:
/vol/gcc/src/hg/master/local/libgo/go/hash/crc64/crc64.go:41:1: internal
compiler error: in operand_subword_force, at emit-rtl.cc:1824
41 | func buildSlicing8Tables() {
| ^
0x208a257 internal_error(char const*, ...)
/vol/gcc/src/hg/master/local/gcc/diagnostic-global-context.cc:517
0x20769b3 fancy_abort(char const*, int, char const*)
/vol/gcc/src/hg/master/local/gcc/diagnostic.cc:1696
0xac9687 operand_subword_force(rtx_def*, poly_int<1u, unsigned long long>,
machine_mode)
/vol/gcc/src/hg/master/local/gcc/emit-rtl.cc:1824
0xe8e883 expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
/vol/gcc/src/hg/master/local/gcc/optabs.cc:1751
0xaf1927 expand_and(machine_mode, rtx_def*, rtx_def*, rtx_def*)
/vol/gcc/src/hg/master/local/gcc/expmed.cc:5521
0xb2ee5f calculate_table_based_CRC(rtx_def**, rtx_def* const&, rtx_def* const&,
machine_mode, machine_mode)
/vol/gcc/src/hg/master/local/gcc/expr.cc:14343
0xb2f0f7 expand_reversed_crc_table_based(rtx_def*, rtx_def*, rtx_def*,
rtx_def*, machine_mode, void (*)(rtx_def**))
/vol/gcc/src/hg/master/local/gcc/expr.cc:14549
0xca121f expand_crc_optab_fn
/vol/gcc/src/hg/master/local/gcc/internal-fn.cc:4116
0xca4703 expand_internal_call(internal_fn, gcall*)
/vol/gcc/src/hg/master/local/gcc/internal-fn.cc:5312
0xca4703 expand_internal_call(gcall*)
/vol/gcc/src/hg/master/local/gcc/internal-fn.cc:5320
0x99cfcb expand_call_stmt
/vol/gcc/src/hg/master/local/gcc/cfgexpand.cc:2807
0x99cfcb expand_gimple_stmt_1
/vol/gcc/src/hg/master/local/gcc/cfgexpand.cc:3974
0x99cfcb expand_gimple_stmt
/vol/gcc/src/hg/master/local/gcc/cfgexpand.cc:4121
0x99e61f expand_gimple_basic_block
/vol/gcc/src/hg/master/local/gcc/cfgexpand.cc:6177
0x9a0b43 execute
/vol/gcc/src/hg/master/local/gcc/cfgexpand.cc:6916
A reghunt identified
commit 4d2b9202fe94c54e63fb07d48293a78da3d82532
Author: Mariam Arutunian <[email protected]>
Date: Mon Nov 11 13:01:19 2024 -0700
[PATCH v7 11/12] Replace the original CRC loops with a faster CRC
calculation
as the culprit.
