https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112904
Bug ID: 112904 Summary: ICE in extract_insn, at recog.cc:2791 with -mxop since r14-4964-g7eed861e8ca3f5 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: mjires at suse dot cz CC: liuhongt at gcc dot gnu.org Target Milestone: --- Compiling reduced testcase g++.target/i386/part-vect-vcondhf.C results in ICE since r14-4964-g7eed861e8ca3f5. $ cat part-vect-vcondhf.C typedef _Float16 __attribute__((__vector_size__(8))) __v4hf; __v4hf cf, df; __attribute__((__vector_size__(4 * sizeof(short)))) short csf_ne_d; __v4hf csf_ne() { return csf_ne_d ? cf : df; } $ g++ part-vect-vcondhf.C -mxop part-vect-vcondhf.C: In function ‘__v4hf csf_ne()’: part-vect-vcondhf.C:4:46: error: unrecognizable insn: 4 | __v4hf csf_ne() { return csf_ne_d ? cf : df; } | ^ (insn 10 9 13 2 (set (reg:V4HF 102 [ _6 ]) (if_then_else:V4HF (subreg:V4HF (reg:V4HI 99 [ _2 ]) 0) (reg:V4HF 100 [ cf.1_3 ]) (reg:V4HF 101 [ df.2_4 ]))) "part-vect-vcondhf.C":4:42 -1 (nil)) during RTL pass: vregs part-vect-vcondhf.C:4:46: internal compiler error: in extract_insn, at recog.cc:2812 0x8da3b4 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /home/mjires/git/GCC/master/gcc/rtl-error.cc:108 0x8da3d0 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /home/mjires/git/GCC/master/gcc/rtl-error.cc:116 0x8d88f1 extract_insn(rtx_insn*) /home/mjires/git/GCC/master/gcc/recog.cc:2812 0xf77cc0 instantiate_virtual_regs_in_insn /home/mjires/git/GCC/master/gcc/function.cc:1611 0xf77cc0 instantiate_virtual_regs /home/mjires/git/GCC/master/gcc/function.cc:1994 0xf77cc0 execute /home/mjires/git/GCC/master/gcc/function.cc:2041 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. $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/home/mjires/built/master/libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /home/mjires/git/GCC/master/configure --prefix=/home/mjires/built/master --disable-bootstrap --enable-checking --enable-languages=c,c++,fortran,lto : (reconfigured) /home/mjires/git/GCC/master/configure --prefix=/home/mjires/built/master --disable-bootstrap --enable-checking --enable-languages=c,c++,fortran,lto Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.0 20231207 (experimental) (GCC)