Hi! Running automated tests again, I found that when building current (2fcfc03459a907c0237ea6e2c6e4ce4871034bed) GCC with a recent GCC, a build (make all-gcc) when ./configure'ed for -target=nvptx-none --enable-werror-always --enable-languages=all --disable-gcov --disable-shared --disable-threads --without-headers fails with:
[all 2021-09-04 16:33:59] /usr/lib/gcc-snapshot/bin/g++ -fno-PIE -c -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include -I../../gcc/gcc/../libcody -I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc/gcc/../libbacktrace -o lra-constraints.o -MT lra-constraints.o -MMD -MP -MF ./.deps/lra-constraints.TPo ../../gcc/gcc/lra-constraints.c [all 2021-09-04 16:34:07] In function 'bool check_and_process_move(bool*, bool*)', [all 2021-09-04 16:34:07] inlined from 'bool curr_insn_transform(bool)' at ../../gcc/gcc/lra-constraints.c:4092:33: [all 2021-09-04 16:34:07] ../../gcc/gcc/lra-constraints.c:1317:56: error: array subscript -1 is below array bounds of 'short int [2][16]' [-Werror=array-bounds] [all 2021-09-04 16:34:07] 1317 | reg_renumber[dregno] = ira_class_hard_regs[dclass][0]; [all 2021-09-04 16:34:07] In file included from ../../gcc/gcc/lra-constraints.c:123: [all 2021-09-04 16:34:07] ../../gcc/gcc/ira.h: In function 'bool curr_insn_transform(bool)': [all 2021-09-04 16:34:07] ../../gcc/gcc/ira.h:85:9: note: while referencing 'target_ira::x_ira_class_hard_regs' [all 2021-09-04 16:34:07] 85 | short x_ira_class_hard_regs[N_REG_CLASSES][FIRST_PSEUDO_REGISTER]; [all 2021-09-04 16:34:07] | ^~~~~~~~~~~~~~~~~~~~~ [all 2021-09-04 16:34:07] In function 'bool check_and_process_move(bool*, bool*)', [all 2021-09-04 16:34:07] inlined from 'bool curr_insn_transform(bool)' at ../../gcc/gcc/lra-constraints.c:4092:33: [all 2021-09-04 16:34:07] ../../gcc/gcc/lra-constraints.c:1324:56: error: array subscript -1 is below array bounds of 'short int [2][16]' [-Werror=array-bounds] [all 2021-09-04 16:34:07] 1324 | reg_renumber[sregno] = ira_class_hard_regs[sclass][0]; [all 2021-09-04 16:34:07] In file included from ../../gcc/gcc/lra-constraints.c:123: [all 2021-09-04 16:34:07] ../../gcc/gcc/ira.h: In function 'bool curr_insn_transform(bool)': [all 2021-09-04 16:34:07] ../../gcc/gcc/ira.h:85:9: note: while referencing 'target_ira::x_ira_class_hard_regs' [all 2021-09-04 16:34:07] 85 | short x_ira_class_hard_regs[N_REG_CLASSES][FIRST_PSEUDO_REGISTER]; [all 2021-09-04 16:34:07] | ^~~~~~~~~~~~~~~~~~~~~ [all 2021-09-04 16:34:13] cc1plus: all warnings being treated as errors [all 2021-09-04 16:34:13] make[1]: *** [Makefile:1142: lra-constraints.o] Error 1 [all 2021-09-04 16:34:13] make[1]: Leaving directory '/var/lib/laminar/run/gcc-nvptx-none/5/toolchain-build/gcc' [all 2021-09-04 16:34:13] make: *** [Makefile:4407: all-gcc] Error 2 Thanks, Jan-Benedict --
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