https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105333
Bug ID: 105333
Summary: [10/11/12 Regression] ICE: in simplify_subreg, at
simplify-rtx.cc:7346 with -Og -fno-tree-coalesce-vars
-fno-tree-fre
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Created attachment 52845
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52845&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -Og -fno-tree-coalesce-vars -fno-tree-fre testcase.c
during RTL pass: combine
testcase.c: In function 'foo':
testcase.c:17:1: internal compiler error: in simplify_subreg, at
simplify-rtx.cc:7346
17 | }
| ^
0x78410d simplify_context::simplify_subreg(machine_mode, rtx_def*,
machine_mode, poly_int<1u, unsigned long>)
/repo/gcc-trunk/gcc/simplify-rtx.cc:7346
0x136f624 simplify_context::simplify_subreg(machine_mode, rtx_def*,
machine_mode, poly_int<1u, unsigned long>)
/repo/gcc-trunk/gcc/simplify-rtx.cc:7444
0x1370958 simplify_context::simplify_gen_subreg(machine_mode, rtx_def*,
machine_mode, poly_int<1u, unsigned long>)
/repo/gcc-trunk/gcc/simplify-rtx.cc:7624
0xf6dbed lowpart_subreg(machine_mode, rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/rtl.h:3547
0xf6dbed gen_lowpart_common(machine_mode, rtx_def*)
/repo/gcc-trunk/gcc/emit-rtl.cc:1617
0x22914bb gen_lowpart_for_combine
/repo/gcc-trunk/gcc/combine.cc:11682
0x136ad76 simplify_context::simplify_unary_operation_1(rtx_code, machine_mode,
rtx_def*)
/repo/gcc-trunk/gcc/simplify-rtx.cc:1243
0x136e44f simplify_context::simplify_unary_operation(rtx_code, machine_mode,
rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.cc:893
0x136e44f simplify_context::simplify_gen_unary(rtx_code, machine_mode,
rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.cc:360
0x136aaf0 simplify_context::simplify_unary_operation_1(rtx_code, machine_mode,
rtx_def*)
/repo/gcc-trunk/gcc/simplify-rtx.cc:1232
0x136e44f simplify_context::simplify_unary_operation(rtx_code, machine_mode,
rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.cc:893
0x136e44f simplify_context::simplify_gen_unary(rtx_code, machine_mode,
rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.cc:360
0x136e5f8 simplify_context::simplify_truncation(machine_mode, rtx_def*,
machine_mode)
/repo/gcc-trunk/gcc/simplify-rtx.cc:652
0x136fb0e simplify_context::simplify_subreg(machine_mode, rtx_def*,
machine_mode, poly_int<1u, unsigned long>)
/repo/gcc-trunk/gcc/simplify-rtx.cc:7595
0x1370958 simplify_context::simplify_gen_subreg(machine_mode, rtx_def*,
machine_mode, poly_int<1u, unsigned long>)
/repo/gcc-trunk/gcc/simplify-rtx.cc:7624
0x2291531 lowpart_subreg(machine_mode, rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/rtl.h:3547
0x2291531 gen_lowpart_for_combine
/repo/gcc-trunk/gcc/combine.cc:11726
0x2288ee4 if_then_else_cond
/repo/gcc-trunk/gcc/combine.cc:9357
0x2288fe5 if_then_else_cond
/repo/gcc-trunk/gcc/combine.cc:9207
0x2288fe5 if_then_else_cond
/repo/gcc-trunk/gcc/combine.cc:9207
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-r12-8210-20220420174944-g6a4e9934545-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.1/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-r12-8210-20220420174944-g6a4e9934545-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220421 (experimental) (GCC)
