https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102478
Bug ID: 102478 Summary: [9/10/11/12 Regression] during RTL pass: ce3: ICE: in gen_reg_rtx, at emit-rtl.c:1167 with -O2 -fno-if-conversion Product: gcc Version: 12.0 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: powerpc64le-unknown-linux-gnu Created attachment 51508 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51508&action=edit reduced testcase Compiler output: $ powerpc64le-unknown-linux-gnu-gcc -O2 -fno-if-conversion testcase.c testcase.c: In function 'foo': testcase.c:6:45: warning: division by zero [-Wdiv-by-zero] 6 | c |= __builtin_expect (65535 / a, 0) && 0 / 0; | ^ during RTL pass: ce3 testcase.c:8:1: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1167 8 | } | ^ 0x63b466 gen_reg_rtx(machine_mode) /repo/gcc-trunk/gcc/emit-rtl.c:1167 0xba8069 force_reg(machine_mode, rtx_def*) /repo/gcc-trunk/gcc/explow.c:676 0xe48e63 prepare_cmp_insn /repo/gcc-trunk/gcc/optabs.c:4396 0xe4a09f gen_cond_trap(rtx_code, rtx_def*, rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/optabs.c:5851 0x19548e7 find_cond_trap /repo/gcc-trunk/gcc/ifcvt.c:4721 0x19548e7 find_if_header /repo/gcc-trunk/gcc/ifcvt.c:4346 0x19548e7 if_convert /repo/gcc-trunk/gcc/ifcvt.c:5475 0x195565d execute /repo/gcc-trunk/gcc/ifcvt.c:5628 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. $ powerpc64le-unknown-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-powerpc64le/bin/powerpc64le-unknown-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-3885-20210924181655-g71f96511084-checking-yes-rtl-df-extra-powerpc64le/bin/../libexec/gcc/powerpc64le-unknown-linux-gnu/12.0.0/lto-wrapper Target: powerpc64le-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-sysroot=/usr/powerpc64le-unknown-linux-gnu --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=powerpc64le-unknown-linux-gnu --with-ld=/usr/bin/powerpc64le-unknown-linux-gnu-ld --with-as=/usr/bin/powerpc64le-unknown-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r12-3885-20210924181655-g71f96511084-checking-yes-rtl-df-extra-powerpc64le Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.0 20210924 (experimental) (GCC)