https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94001
Bug ID: 94001
Summary: [10 Regression] ICE: in fold_convert_loc, at
fold-const.c:2435 at -O2
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: {riscv64,sparc64,powerpc64,aarch64}-unknown-linux-gnu
Created attachment 47945
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47945&action=edit
reduced testcase
This affects several targets, but I failed to reproduce this on x86_64.
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O2 testcase.c
during GIMPLE pass: tailr
testcase.c: In function 'bar.isra':
testcase.c:4:1: internal compiler error: in fold_convert_loc, at
fold-const.c:2435
4 | bar (unsigned char e)
| ^~~
0x631c58 fold_convert_loc(unsigned int, tree_node*, tree_node*)
/repo/gcc-trunk/gcc/fold-const.c:2435
0x10e6d1c update_accumulator_with_ops
/repo/gcc-trunk/gcc/tree-tailcall.c:832
0x10e9261 adjust_accumulator_values
/repo/gcc-trunk/gcc/tree-tailcall.c:877
0x10e9261 eliminate_tail_call
/repo/gcc-trunk/gcc/tree-tailcall.c:1018
0x10e9261 optimize_tail_call
/repo/gcc-trunk/gcc/tree-tailcall.c:1041
0x10e9261 tree_optimize_tail_calls_1
/repo/gcc-trunk/gcc/tree-tailcall.c:1178
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.
$ riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20200301175845-g649e174102a-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/10.0.1/lto-wrapper
Target: riscv64-unknown-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
--with-sysroot=/usr/riscv64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=riscv64-unknown-linux-gnu
--with-ld=/usr/bin/riscv64-unknown-linux-gnu-ld
--with-as=/usr/bin/riscv64-unknown-linux-gnu-as --disable-multilib
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20200301175845-g649e174102a-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200302 (experimental) (GCC)
