https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116096
Bug ID: 116096
Summary: during RTL pass: cprop_hardreg ICE: in extract_insn,
at recog.cc:2848 (unrecognizable insn ashift:TI?) with
-O2 -flive-range-shrinkage -fno-peephole2
-mstackrealign
Product: gcc
Version: 15.0
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 58760
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58760&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -flive-range-shrinkage -fno-peephole2
-mstackrealign testcase.c -Wno-psabi
testcase.c: In function 'foo':
testcase.c:23:1: error: unrecognizable insn:
23 | }
| ^
(insn 98 452 387 2 (parallel [
(set (reg:TI 0 ax [orig:337 _32 ] [337])
(ashift:TI (const_int 1671291085 [0x639de0cd])
(reg:QI 2 cx [521])))
(clobber (reg:CC 17 flags))
]) "testcase.c":11:13 -1
(expr_list:REG_DEAD (reg:QI 2 cx [521])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_EQUIV (mem:TI (plus:DI (reg/f:DI 19 frame)
(const_int -80 [0xffffffffffffffb0])) [2 S16 A128])
(expr_list:REG_EQUAL (ashift:TI (const_int 1671291085
[0x639de0cd])
(reg:QI 0 ax [535]))
(nil))))))
during RTL pass: cprop_hardreg
testcase.c:23:1: internal compiler error: in extract_insn, at recog.cc:2848
0x2b3d6ae internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:491
0xe50941 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1742
0x81e2f3 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x81e370 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:116
0x80d1b9 extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2848
0x14d6928 extract_constrain_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2747
0x14e1c9b copyprop_hardreg_forward_1
/repo/gcc-trunk/gcc/regcprop.cc:836
0x14e3094 execute
/repo/gcc-trunk/gcc/regcprop.cc:1423
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-r15-2320-20240725090119-g3aeb697a215-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/15.0.0/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 --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r15-2320-20240725090119-g3aeb697a215-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20240725 (experimental) (GCC)
