https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116437
Bug ID: 116437
Summary: [15 Regression] ICE: RTL check: expected code 'reg',
have 'subreg' in rhs_regno, at rtl.h:1934 with -O2
-march=emeraldrapids -fno-split-wide-types -m32
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 58966
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58966&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -march=emeraldrapids -fno-split-wide-types -m32
testcase.c
during RTL pass: ext_dce
testcase.c: In function 'foo':
testcase.c:16:1: internal compiler error: RTL check: expected code 'reg', have
'subreg' in rhs_regno, at rtl.h:1934
16 | }
| ^
0x2b5bf5e internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:491
0x821738 rtl_check_failed_code1(rtx_def const*, rtx_code, char const*, int,
char const*)
/repo/gcc-trunk/gcc/rtl.cc:770
0xe051c6 rhs_regno(rtx_def const*)
/repo/gcc-trunk/gcc/rtl.h:1934
0xe054de rhs_regno(rtx_def const*)
/repo/gcc-trunk/gcc/ext-dce.cc:405
0xe054de ext_dce_try_optimize_insn
/repo/gcc-trunk/gcc/ext-dce.cc:426
0xe054de ext_dce_process_uses
/repo/gcc-trunk/gcc/ext-dce.cc:679
0x28cce0f ext_dce_process_bb
/repo/gcc-trunk/gcc/ext-dce.cc:887
0x28cce0f ext_dce_rd_transfer_n
/repo/gcc-trunk/gcc/ext-dce.cc:1029
0x106bf8b df_worklist_propagate_backward
/repo/gcc-trunk/gcc/df-core.cc:970
0x106bf8b df_worklist_dataflow_doublequeue
/repo/gcc-trunk/gcc/df-core.cc:1054
0x106bf8b df_worklist_dataflow(dataflow*, bitmap_head*, int*, int)
/repo/gcc-trunk/gcc/df-core.cc:1132
0x28cd2f7 ext_dce_execute()
/repo/gcc-trunk/gcc/ext-dce.cc:1058
0x28cd658 execute
/repo/gcc-trunk/gcc/ext-dce.cc:1098
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-r15-3013-20240819104043-g8d6c6fbc527-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-r15-3013-20240819104043-g8d6c6fbc527-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20240819 (experimental) (GCC)
