https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110989
Bug ID: 110989 Summary: RISC-V vector ICE due to invalid tree code in GIMPLE vect pass Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: jeremy.bennett at embecosm dot com Target Milestone: --- Created attachment 55722 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55722&action=edit C source of the testcase The following code (testcase.c) causes an ICE when using RISC-V vector as target. int a, b, c; double *d; void e() { double f; for (; c; c++, d--) f = *d ?: *(&a + c); b = f; } Compiled with: riscv64-unknown-linux-gnu-gcc -march=rv64gcv -mabi=lp64d -c \ -Ofast --param=riscv-autovec-preference=scalable testcase.c The output is: during GIMPLE pass: vect testcase.c: In function 'e': testcase.c:3:6: internal compiler error: tree check: expected class 'type', have 'exceptional' (<invalid tree code>) in build_int_cst, at tree.cc:1507 3 | void e() { | ^ 0x914c99 tree_class_check_failed(tree_node const*, tree_code_class, char const*, int, char const*) /home/jeremy/gittrees/mustang/gcc/gcc/tree.cc:8949 0x91e2c7 tree_class_check(tree_node*, tree_code_class, char const*, int, char const*) /home/jeremy/gittrees/mustang/gcc/gcc/tree.h:3700 0x91e2c7 build_int_cst(tree_node*, poly_int<2u, long>) /home/jeremy/gittrees/mustang/gcc/gcc/tree.cc:1507 0x20f3e2d vectorizable_load /home/jeremy/gittrees/mustang/gcc/gcc/tree-vect-stmts.cc:10719 0x2100ee5 vect_transform_stmt(vec_info*, _stmt_vec_info*, gimple_stmt_iterator*, _slp_tree*, _slp_instance*) /home/jeremy/gittrees/mustang/gcc/gcc/tree-vect-stmts.cc:12337 0x131f464 vect_transform_loop_stmt /home/jeremy/gittrees/mustang/gcc/gcc/tree-vect-loop.cc:11039 0x13442bc vect_transform_loop(_loop_vec_info*, gimple*) /home/jeremy/gittrees/mustang/gcc/gcc/tree-vect-loop.cc:11488 0x138611f vect_transform_loops /home/jeremy/gittrees/mustang/gcc/gcc/tree-vectorizer.cc:1004 0x138679c try_vectorize_loop_1 /home/jeremy/gittrees/mustang/gcc/gcc/tree-vectorizer.cc:1150 0x138679c try_vectorize_loop /home/jeremy/gittrees/mustang/gcc/gcc/tree-vectorizer.cc:1180 0x1386b44 execute /home/jeremy/gittrees/mustang/gcc/gcc/tree-vectorizer.cc:1296 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. System information ------------------ Using built-in specs. COLLECT_GCC=riscv64-unknown-linux-gnu-gcc COLLECT_LTO_WRAPPER=/home/jeremy/gittrees/mustang/install/libexec/gcc/riscv64-unknown-linux-gnu/14.0.0/lto-wrapper Target: riscv64-unknown-linux-gnu Configured with: /home/jeremy/gittrees/mustang/gcc/configure --target=riscv64-unknown-linux-gnu --prefix=/home/jeremy/gittrees/mustang/install --with-sysroot=/home/jeremy/gittrees/mustang/install/sysroot --with-pkgversion=g68783211f66 --with-system-zlib --enable-shared --enable-tls --enable-languages=c,c++,fortran --disable-libmudflap --disable-libssp --disable-libquadmath --disable-libsanitizer --disable-nls --disable-bootstrap --src=/home/jeremy/gittrees/mustang/gcc --enable-multilib --with-abi=lp64d --with-arch=rv64gc --with-tune= --with-isa-spec=20191213 'CFLAGS_FOR_TARGET=-O2 -mcmodel=medany' 'CXXFLAGS_FOR_TARGET=-O2 -mcmodel=medany' Thread model: posix Supported LTO compression algorithms: zlib gcc version 14.0.0 20230811 (experimental) (g68783211f66)