https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113738
Bug ID: 113738 Summary: [14 Regression] ICE: in df_reg_chain_verify_unmarked, at df-scan.cc:4001 with -O2 -march=rv64gcv Product: gcc Version: 14.0 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: riscv64-unknown-linux-gnu Created attachment 57305 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57305&action=edit reduced testcase (from gcc.dg/torture/pr45764.c) Compiler output: $ riscv64-unknown-linux-gnu-gcc -O2 -march=rv64gcv testcase.c during RTL pass: rtl_dce testcase.c: In function 'foo': testcase.c:7:1: internal compiler error: in df_reg_chain_verify_unmarked, at df-scan.cc:4001 7 | } | ^ 0xa138ee df_reg_chain_verify_unmarked /repo/gcc-trunk/gcc/df-scan.cc:4001 0xa15111 df_reg_chain_verify_unmarked /repo/gcc-trunk/gcc/df-scan.cc:4218 0xa15111 df_scan_verify() /repo/gcc-trunk/gcc/df-scan.cc:4264 0x11f06d1 df_verify() /repo/gcc-trunk/gcc/df-core.cc:1834 0x11f06d1 df_analyze_1 /repo/gcc-trunk/gcc/df-core.cc:1221 0x29de3d5 init_dce /repo/gcc-trunk/gcc/dce.cc:763 0x29e103d rest_of_handle_fast_dce /repo/gcc-trunk/gcc/dce.cc:1193 0x29e103d execute /repo/gcc-trunk/gcc/dce.cc:1290 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. $ 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-r14-8771-20240203001826-g4b7d4d8a4af-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/14.0.1/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-isa-spec=2.2 --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-r14-8771-20240203001826-g4b7d4d8a4af-checking-yes-rtl-df-extra-riscv64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.1 20240203 (experimental) (GCC)