https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93312
Bug ID: 93312
Summary: [10 Regression] ICE: RTL check: expected code 'reg',
have 'subreg' in rhs_regno, at rtl.h:1923
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-checking, 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: armv7a-hardfloat-linux-gnueabi
Created attachment 47672
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47672&action=edit
reduced testcase
This triggers while building libgcc2.o with RTL checking enabled.
$ cc1 -quiet -O testcase.c
during RTL pass: combine
testcase.c: In function 'foo':
testcase.c:8:1: internal compiler error: RTL check: expected code 'reg', have
'subreg' in rhs_regno, at rtl.h:1923
8 | }
| ^
0x6ca66c rtl_check_failed_code1(rtx_def const*, rtx_code, char const*, int,
char const*)
/repo/gcc-trunk/gcc/rtl.c:879
0x7939ac rhs_regno
/repo/gcc-trunk/gcc/rtl.h:1923
0x79fbf4 rhs_regno
/repo/gcc-trunk/gcc/config/arm/arm.c:13807
0x79fbf4 clear_operation_p(rtx_def*, bool)
/repo/gcc-trunk/gcc/config/arm/arm.c:13782
0x174b80a clear_multiple_operation_1
/repo/gcc-trunk/gcc/config/arm/predicates.md:551
0x174b80a clear_multiple_operation(rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/config/arm/predicates.md:558
0x17aac6f recog_41
/repo/gcc-trunk/gcc/config/arm/vfp.md:1989
0x183e0d7 recog(rtx_def*, rtx_insn*, int*)
/repo/gcc-trunk/gcc/config/arm/arm-fixed.md:558
0x187516f recog_for_combine_1
/repo/gcc-trunk/gcc/combine.c:11447
0x187fe9e recog_for_combine
/repo/gcc-trunk/gcc/combine.c:11717
0x189569b try_combine
/repo/gcc-trunk/gcc/combine.c:3656
0x1899a73 combine_instructions
/repo/gcc-trunk/gcc/combine.c:1303
0x1899a73 rest_of_handle_combine
/repo/gcc-trunk/gcc/combine.c:15059
0x1899a73 execute
/repo/gcc-trunk/gcc/combine.c:15104
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.
$ xgcc -v
Using built-in specs.
COLLECT_GCC=/repo/build-trunk-20200117170346-0ba6a850b59-checking-yes-rtl-df-extra-armv7a-hardfloat/./gcc/xgcc
Target: armv7a-hardfloat-linux-gnueabi
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 --with-float=hard --with-fpu=vfpv4
--with-arch=armv7-a --with-sysroot=/usr/armv7a-hardfloat-linux-gnueabi
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=armv7a-hardfloat-linux-gnueabi
--with-ld=/usr/bin/armv7a-hardfloat-linux-gnueabi-ld
--with-as=/usr/bin/armv7a-hardfloat-linux-gnueabi-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20200117170346-0ba6a850b59-checking-yes-rtl-df-extra-armv7a-hardfloat
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200117 (experimental) (GCC)
