https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94942
Bug ID: 94942
Summary: [10/11 Regression] ICE: in extract_constrain_insn, at
recog.c:2195 (insn does not satisfy its constraints)
with -O -flive-range-shrinkage -ftree-vrp -mavx512vl
Product: gcc
Version: 11.0
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
Created attachment 48437
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48437&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -flive-range-shrinkage -ftree-vrp -mavx512vl
testcase.c
testcase.c: In function 'foo':
testcase.c:16:31: warning: division by zero [-Wdiv-by-zero]
16 | W v = (k | k >> m + (W){4}) % 0;
| ^
testcase.c:20:1: error: insn does not satisfy its constraints:
20 | }
| ^
(insn 365 309 359 2 (set (reg:V8HI 20 xmm0 [511])
(vec_duplicate:V8HI (reg:HI 52 xmm16))) "testcase.c":15:5 5054
{*vec_dupv8hi}
(expr_list:REG_DEAD (reg:HI 52 xmm16)
(nil)))
during RTL pass: cprop_hardreg
testcase.c:20:1: internal compiler error: in extract_constrain_insn, at
recog.c:2195
0x6d467c _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.c:108
0x6d4709 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.c:118
0x6c3d6c extract_constrain_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.c:2195
0xf4aadc copyprop_hardreg_forward_1
/repo/gcc-trunk/gcc/regcprop.c:802
0xf4bd4e execute
/repo/gcc-trunk/gcc/regcprop.c:1367
Please submit a full bug report,
with preprocessed source if appropriate.
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-r11-36-20200504110332-g6b5c7ee0df6-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/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
--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-r11-36-20200504110332-g6b5c7ee0df6-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.0.0 20200504 (experimental) (GCC)
