On 5/22/23 17:58, Jan-Benedict Glaw wrote:
Hi!

One of the supplied argument strings is unneccesarily long (c-sky, using
basically the same code, fixed it to a shorter length) and this fixes overflow
warnings, as GCC fails to deduce that the full 256 bytes for load_op[] are
not used at all.


make[1]: Entering directory 
'/var/lib/laminar/run/gcc-mcore-elf/38/toolchain-build/gcc'
[...]
/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 -Wmissing-format-attribute -Wconditionally-supported 
-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 mcore.o -MT mcore.o -MMD 
-MP -MF ./.deps/mcore.TPo ../../gcc/gcc/config/mcore/mcore.cc
../../gcc/gcc/config/mcore/mcore.cc: In function 'const char* 
output_inline_const(machine_mode, rtx_def**)':
../../gcc/gcc/config/mcore/mcore.cc:1264:24: error: '
        ixw     ' directive writing 6 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1264 |       sprintf (buf, "%s\n\tixw\t%s,%s\t// %ld 0x%lx", load_op, 
dst_fmt, dst_fmt, value, value);
       |                        ^~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1264:21: note: using the range [0, 
18446744073709551615] for directive argument
  1264 |       sprintf (buf, "%s\n\tixw\t%s,%s\t// %ld 0x%lx", load_op, 
dst_fmt, dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1264:15: note: 'sprintf' output between 21 
and 310 bytes into a destination of size 256
  1264 |       sprintf (buf, "%s\n\tixw\t%s,%s\t// %ld 0x%lx", load_op, 
dst_fmt, dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1261:24: error: '
        ixh     ' directive writing 6 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1261 |       sprintf (buf, "%s\n\tixh\t%s,%s\t// %ld 0x%lx", load_op, 
dst_fmt, dst_fmt, value, value);
       |                        ^~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1261:21: note: using the range [0, 
18446744073709551615] for directive argument
  1261 |       sprintf (buf, "%s\n\tixh\t%s,%s\t// %ld 0x%lx", load_op, 
dst_fmt, dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1261:15: note: 'sprintf' output between 21 
and 310 bytes into a destination of size 256
  1261 |       sprintf (buf, "%s\n\tixh\t%s,%s\t// %ld 0x%lx", load_op, 
dst_fmt, dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1258:24: error: '
        lsli    ' directive writing 7 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1258 |       sprintf (buf, "%s\n\tlsli\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1258:21: note: using the range [0, 
18446744073709551615] for directive argument
  1258 |       sprintf (buf, "%s\n\tlsli\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1258:15: note: 'sprintf' output between 22 
and 311 bytes into a destination of size 256
  1258 |       sprintf (buf, "%s\n\tlsli\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1255:24: error: '
        rotli   ' directive writing 8 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1255 |       sprintf (buf, "%s\n\trotli\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1255:21: note: using the range [0, 
18446744073709551615] for directive argument
  1255 |       sprintf (buf, "%s\n\trotli\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1255:15: note: 'sprintf' output between 23 
and 312 bytes into a destination of size 256
  1255 |       sprintf (buf, "%s\n\trotli\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1252:24: error: '
        bclri   ' directive writing 8 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1252 |       sprintf (buf, "%s\n\tbclri\t%s,%%Q2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1252:21: note: using the range [0, 
18446744073709551615] for directive argument
  1252 |       sprintf (buf, "%s\n\tbclri\t%s,%%Q2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1252:15: note: 'sprintf' output between 24 
and 313 bytes into a destination of size 256
  1252 |       sprintf (buf, "%s\n\tbclri\t%s,%%Q2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1249:24: error: '
        bseti   ' directive writing 8 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1249 |       sprintf (buf, "%s\n\tbseti\t%s,%%P2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1249:21: note: using the range [0, 
18446744073709551615] for directive argument
  1249 |       sprintf (buf, "%s\n\tbseti\t%s,%%P2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1249:15: note: 'sprintf' output between 24 
and 313 bytes into a destination of size 256
  1249 |       sprintf (buf, "%s\n\tbseti\t%s,%%P2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1246:24: error: '
        rsubi   ' directive writing 8 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1246 |       sprintf (buf, "%s\n\trsubi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1246:21: note: using the range [0, 
18446744073709551615] for directive argument
  1246 |       sprintf (buf, "%s\n\trsubi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1246:15: note: 'sprintf' output between 23 
and 312 bytes into a destination of size 256
  1246 |       sprintf (buf, "%s\n\trsubi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1242:24: error: '
        subi    ' directive writing 7 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1242 |       sprintf (buf, "%s\n\tsubi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1242:21: note: using the range [0, 
18446744073709551615] for directive argument
  1242 |       sprintf (buf, "%s\n\tsubi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1242:15: note: 'sprintf' output between 22 
and 311 bytes into a destination of size 256
  1242 |       sprintf (buf, "%s\n\tsubi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1239:24: error: '
        addi    ' directive writing 7 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1239 |       sprintf (buf, "%s\n\taddi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                        ^~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1239:21: note: using the range [0, 
18446744073709551615] for directive argument
  1239 |       sprintf (buf, "%s\n\taddi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1239:15: note: 'sprintf' output between 22 
and 311 bytes into a destination of size 256
  1239 |       sprintf (buf, "%s\n\taddi\t%s,%%2\t// %ld 0x%lx", load_op, 
dst_fmt, value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1236:24: error: '
        not     ' directive writing 6 bytes into a region of size between 1 and 
256 [-Werror=format-overflow=]
  1236 |       sprintf (buf, "%s\n\tnot\t%s\t// %ld 0x%lx", load_op, dst_fmt, 
value, value);
       |                        ^~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1236:21: note: using the range [0, 
18446744073709551615] for directive argument
  1236 |       sprintf (buf, "%s\n\tnot\t%s\t// %ld 0x%lx", load_op, dst_fmt, 
value, value);
       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/config/mcore/mcore.cc:1236:15: note: 'sprintf' output between 18 
and 307 bytes into a destination of size 256
  1236 |       sprintf (buf, "%s\n\tnot\t%s\t// %ld 0x%lx", load_op, dst_fmt, 
value, value);
       |       
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
make[1]: *** [Makefile:2461: mcore.o] Error 1



gcc/ChangeLog:

        * config/mcore/mcore.cc (output_inline_const) Make buffer smaller to
        silence overflow warnings later on.
128 is probably still unnecessarily long, but OK.

jeff

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