[PATCH] diagnostics: ignore -fmax-errors for ICE

[Jeff Law]

On 12/1/20 9:35 AM, Martin Liška wrote:
> Right now I see:
>
> ./xgcc -B. ~/Programming/testcases/json.i -c -O2 -fmax-errors=1
> /home/marxin/Programming/testcases/json.i: In function
> ‘json_variant_type’:
> /home/marxin/Programming/testcases/json.i:22:1: error: non-integral
> type switch statement
>    22 | }
>       | ^
> int *
> switch (v_2(D)) <default: <L16> [INV], case 0B: <L11> [INV], case 5B:
> <L12> [INV], case 6B: <L13> [INV], case 7B: <L14> [INV], case 8B:
> <L15> [INV]>
> compilation terminated due to -fmax-errors=1.
>
> with the patch I get:
>
> ./xgcc -B. ~/Programming/testcases/json.i -c -O2 -fmax-errors=1 -c
> /home/marxin/Programming/testcases/json.i: In function
> ‘json_variant_type’:
> /home/marxin/Programming/testcases/json.i:22:1: error: non-integral
> type switch statement
>    22 | }
>       | ^
> int *
> switch (v_2(D)) <default: <L16> [INV], case 0B: <L11> [INV], case 5B:
> <L12> [INV], case 6B: <L13> [INV], case 7B: <L14> [INV], case 8B:
> <L15> [INV]>
> during GIMPLE pass: iftoswitch
> /home/marxin/Programming/testcases/json.i:22:1: internal compiler
> error: verify_gimple failed
> 0xe4478c verify_gimple_in_cfg(function*, bool)
>     /home/marxin/Programming/gcc/gcc/tree-cfg.c:5467
> 0xd201cf execute_function_todo
>     /home/marxin/Programming/gcc/gcc/passes.c:2042
> 0xd2101c do_per_function
>     /home/marxin/Programming/gcc/gcc/passes.c:1687
> 0xd2101c execute_todo
>     /home/marxin/Programming/gcc/gcc/passes.c:2096
> 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.
>
> gcc/ChangeLog:
>
>     * diagnostic.c (diagnostic_report_diagnostic): ICE causes to
>     terminate compiler immediately, so I guess it should be printed
>     always.
OK
jeff