https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90275
Bug ID: 90275 Summary: [8/9/10 Regression] ICE: in insert_regs, at cse.c:1128 with -O2 -fno-dce -fno-tree-dce Product: gcc Version: 10.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: armv7a-hardfloat-linux-gnueabi Created attachment 46259 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46259&action=edit reduced testcase Compiler output: $ armv7a-hardfloat-linux-gnueabi-gcc -O2 -fno-dce -fno-tree-dce testcase.c during RTL pass: cse_local testcase.c: In function 'foo': testcase.c:11:1: internal compiler error: in insert_regs, at cse.c:1129 11 | } | ^ 0x7d954d insert_regs /repo/gcc-trunk/gcc/cse.c:1129 0x16445a8 cse_insn /repo/gcc-trunk/gcc/cse.c:5980 0x164783b cse_extended_basic_block /repo/gcc-trunk/gcc/cse.c:6662 0x164783b cse_main /repo/gcc-trunk/gcc/cse.c:6841 0x164874d rest_of_handle_cse_after_global_opts /repo/gcc-trunk/gcc/cse.c:7820 0x164874d execute /repo/gcc-trunk/gcc/cse.c:7871 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. $ armv7a-hardfloat-linux-gnueabi-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-armv7a-hardfloat/bin/armv7a-hardfloat-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-270639-checking-yes-rtl-df-extra-armv7a-hardfloat/bin/../libexec/gcc/armv7a-hardfloat-linux-gnueabi/10.0.0/lto-wrapper Target: armv7a-hardfloat-linux-gnueabi 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-float=hard --with-fpu=vfpv4 --with-arch=armv7-a --with-sysroot=/usr/armv7a-hardfloat-linux-gnueabi --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=armv7a-hardfloat-linux-gnueabi --with-ld=/usr/bin/armv7a-hardfloat-linux-gnueabi-ld --with-as=/usr/bin/armv7a-hardfloat-linux-gnueabi-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-270639-checking-yes-rtl-df-extra-armv7a-hardfloat Thread model: posix gcc version 10.0.0 20190429 (experimental) (GCC)