[Bug tree-optimization/92860] [8/9/10/11 regression] Global flags affected by -O settings are clobbered by optimize attribute

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92860

Arseny Solokha <asolokha at gmx dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |asolokha at gmx dot com

--- Comment #38 from Arseny Solokha <asolokha at gmx dot com> ---
JFTR I can easily reproduce it e.g. in the following setup:

% powerpc-e300c3-linux-gnu-gcc-11.0.0 -mcpu=power9 -c
gcc/testsuite/gcc.target/s390/target-attribute/tpragma-struct-vx-1.c
gcc/testsuite/gcc.target/s390/target-attribute/tpragma-struct-vx-1.c:10:9:
error: #pragma GCC target 'arch=z13' is invalid
   10 | #pragma GCC target ("arch=z13,vx")
      |         ^~~
gcc/testsuite/gcc.target/s390/target-attribute/tpragma-struct-vx-1.c:10:9:
error: #pragma GCC target 'vx' is invalid
gcc/testsuite/gcc.target/s390/target-attribute/tpragma-struct-vx-1.c:23:9:
internal compiler error: 'global_options' are modified in local context
   23 | #pragma GCC pop_options
      |         ^~~
0xd89fc5 cl_optimization_compare(gcc_options*, gcc_options*)
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/build/gcc/options-save.c:10459
0x9196b6 handle_pragma_pop_options
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/gcc-11-20200705/gcc/c-family/c-pragma.c:1090
0x895510 c_parser_pragma
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/gcc-11-20200705/gcc/c/c-parser.c:12544
0x8b7c75 c_parser_external_declaration
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/gcc-11-20200705/gcc/c/c-parser.c:1754
0x8b82b1 c_parser_translation_unit
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/gcc-11-20200705/gcc/c/c-parser.c:1646
0x8b82b1 c_parse_file()
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/gcc-11-20200705/gcc/c/c-parser.c:21822
0x916cb7 c_common_parse_file()
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20200705/work/gcc-11-20200705/gcc/c-family/c-opts.c:1190