On 8/28/22 13:09, Jan-Benedict Glaw wrote:
Hi!

The nvptx backend defines ASM_OUTPUT_DEF along with
ASM_OUTPUT_DEF_FROM_DECLS.  Much like the rs6000 coff target, nvptx
triggers an unused variable warning:

/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 -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 varasm.o -MT varasm.o -MMD -MP -MF 
./.deps/varasm.TPo ../../gcc/gcc/varasm.cc
../../gcc/gcc/varasm.cc: In function 'void 
output_constant_pool_contents(rtx_constant_pool*)':
../../gcc/gcc/varasm.cc:4318:21: error: unused variable 'name' 
[-Werror=unused-variable]
  4318 |         const char *name = XSTR (desc->sym, 0);
       |                     ^~~~
cc1plus: all warnings being treated as errors
make[1]: *** [Makefile:1145: varasm.o] Error 1


Fixed the same way:

diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index ed72c253191..71297440566 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -321,6 +321,9 @@ struct GTY(()) machine_function
  #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)    \
    do                                          \
      {                                         \
+      (void) (FILE);                           \
+      (void) (LABEL1);                         \
+      (void) (LABEL2);                         \
        gcc_unreachable ();                     \
      }                                         \
    while (0)


Ok for HEAD?


LGTM.

Thanks,
- Tom

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