https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112445
Bug ID: 112445
Summary: [14 Regression] ICE: in lra_split_hard_reg_for, at
lra-assigns.cc:1861 unable to find a register to
spill: {*umulditi3_1} with -O -march=cascadelake
-fwrapv
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 56536
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56536&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -march=cascadelake -fwrapv testcase.c
testcase.c: In function 'foo':
testcase.c:19:1: error: unable to find a register to spill
19 | }
| ^
testcase.c:19:1: error: this is the insn:
(insn 37 142 199 2 (parallel [
(set (reg:TI 302 [orig:150 _73 ] [150])
(mult:TI (zero_extend:TI (reg:DI 184 [ cu8_0 ]))
(zero_extend:TI (reg:DI 181 [ foo0_s64_0 ]))))
(clobber (reg:CC 17 flags))
]) "testcase.c":10:9 510 {*umulditi3_1}
(expr_list:REG_DEAD (reg:DI 184 [ cu8_0 ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
during RTL pass: reload
testcase.c:19:1: internal compiler error: in lra_split_hard_reg_for, at
lra-assigns.cc:1861
0x7f3bef _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x12b9d6d lra_split_hard_reg_for()
/repo/gcc-trunk/gcc/lra-assigns.cc:1861
0x12b3268 lra(_IO_FILE*)
/repo/gcc-trunk/gcc/lra.cc:2495
0x1261999 do_reload
/repo/gcc-trunk/gcc/ira.cc:5973
0x1261999 execute
/repo/gcc-trunk/gcc/ira.cc:6161
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-5250-20231108213319-g8cf7b936d44-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-5250-20231108213319-g8cf7b936d44-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231108 (experimental) (GCC)
