https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113093
Bug ID: 113093 Summary: [14 Regression][aarch64] ICE in rtl_verify_bb_insn, at cfgrtl.cc:2796 since r14-6605-gc0911c6b357ba9 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: acoplan at gcc dot gnu.org Target Milestone: --- Target: aarch64 Compiling reduced testcase gcc.dg/compat/scalar-return-3_y.c results in ICE since r14-6605-gc0911c6b357ba9. $ cat scalar-return-3_y.c _Complex long *c; void init() { *c = 1.0; } $ aarch64-linux-gnu-gcc scalar-return-3_y.c -Os -fharden-control-flow-redundancy -fnon-call-exceptions scalar-return-3_y.c: In function ‘init’: scalar-return-3_y.c:2:25: error: in basic block 2: 2 | void init() { *c = 1.0; } | ^ scalar-return-3_y.c:2:25: error: flow control insn inside a basic block (insn 12 11 66 2 (set (mem:V2x8QI (reg/f:DI 100 [ c.0_1 ]) [0 +0 S16 A64]) (unspec:V2x8QI [ (reg:DI 109) (const_int 0 [0]) ] UNSPEC_STP)) "scalar-return-3_y.c":2:18 91 {*store_pair_8} (expr_list:REG_EH_REGION (const_int 1 [0x1]) (nil))) during RTL pass: ldp_fusion scalar-return-3_y.c:2:25: internal compiler error: in rtl_verify_bb_insns, at cfgrtl.cc:2802 0x16e5db4 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /home/mjires/git/GCC/master/gcc/rtl-error.cc:108 0x105e9d6 rtl_verify_bb_insns /home/mjires/git/GCC/master/gcc/cfgrtl.cc:2802 0x105ec9e rtl_verify_flow_info_1 /home/mjires/git/GCC/master/gcc/cfgrtl.cc:2889 0x105f3fd rtl_verify_flow_info /home/mjires/git/GCC/master/gcc/cfgrtl.cc:3134 0x10448c2 verify_flow_info() /home/mjires/git/GCC/master/gcc/cfghooks.cc:283 0x103b2fa checking_verify_flow_info() /home/mjires/git/GCC/master/gcc/cfghooks.h:214 0x2956e01 try_optimize_cfg /home/mjires/git/GCC/master/gcc/cfgcleanup.cc:2980 0x29572da cleanup_cfg(int) /home/mjires/git/GCC/master/gcc/cfgcleanup.cc:3143 0x1e2bd7f ldp_fusion_destroy /home/mjires/git/GCC/master/gcc/config/aarch64/aarch64-ldp-fusion.cc:2426 0x1e2cb02 ldp_fusion() /home/mjires/git/GCC/master/gcc/config/aarch64/aarch64-ldp-fusion.cc:2650 0x1e2cbec execute /home/mjires/git/GCC/master/gcc/config/aarch64/aarch64-ldp-fusion.cc:2698 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. $ aarch64-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=aarch64-linux-gnu-gcc COLLECT_LTO_WRAPPER=/home/mjires/built/master/libexec/gcc/aarch64-linux-gnu/14.0.0/lto-wrapper Target: aarch64-linux-gnu Configured with: /home/mjires/git/GCC/master/configure --prefix=/home/mjires/built/master --target=aarch64-linux-gnu --disable-bootstrap --enable-languages=c,c++,fortran --disable-multilib --disable-libsanitizer --enable-checking : (reconfigured) /home/mjires/git/GCC/master/configure --prefix=/home/mjires/built/master --target=aarch64-linux-gnu --disable-bootstrap --enable-languages=c,c++,fortran --disable-multilib --disable-libsanitizer --enable-checking Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.0 20231220 (experimental) (GCC)