https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100775
Bug ID: 100775 Summary: ICE: in df_exit_block_bitmap_verify, at df-scan.c:4164 with -mthumb -fzero-call-used-regs=used 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: armv7a-hardfloat-linux-gnueabi Created attachment 50873 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50873&action=edit reduced testcase Compiler output: $ armv7a-hardfloat-linux-gnueabi-gcc -mthumb -fzero-call-used-regs=used testcase.c exit_block_uses = 0 [r0] 3 [r3] 7 [r7] 13 [sp] 14 [lr] 102 [sfp] df->exit_block_uses = 0 [r0] 7 [r7] 13 [sp] 14 [lr] 102 [sfp] during RTL pass: mach testcase.c: In function 'foo': testcase.c:5:1: internal compiler error: in df_exit_block_bitmap_verify, at df-scan.c:4164 5 | } | ^ 0xbb6462 df_exit_block_bitmap_verify /repo/gcc-trunk/gcc/df-scan.c:4164 0xbb6462 df_scan_verify() /repo/gcc-trunk/gcc/df-scan.c:4217 0xba0067 df_verify() /repo/gcc-trunk/gcc/df-core.c:1818 0xba0067 df_analyze_1 /repo/gcc-trunk/gcc/df-core.c:1214 0x13b5a99 thumb2_reorg /repo/gcc-trunk/gcc/config/arm/arm.c:18990 0x13b5a99 arm_reorg /repo/gcc-trunk/gcc/config/arm/arm.c:19209 0xf96979 execute /repo/gcc-trunk/gcc/reorg.c:3927 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-r12-1066-20210526112842-g95d67762171-checking-yes-rtl-df-extra-armv7a-hardfloat/bin/../libexec/gcc/armv7a-hardfloat-linux-gnueabi/12.0.0/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-r12-1066-20210526112842-g95d67762171-checking-yes-rtl-df-extra-armv7a-hardfloat Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.0 20210526 (experimental) (GCC)