Re: Guidance requested on narrowing down internal compiler error

[Gaius Mulley]

john o goyo <jog37@riddermarkfarm.ca> writes:

> Greetings, Gaius.
>
> Compiling a legacy module gave me the following error.
>
> cc1gm2: internal compiler error: not implemented yet
> 0x6d267f m2linemap_internal_error
> /home/build/opt/gcc/src/gcc-git/gcc/m2/gm2-gcc/m2linemap.cc:253
> [...]
> 0x772a9b Type
>         m2/gm2-compiler-boot/P2Build.c:4179
> 0x775293 Definition
>         m2/gm2-compiler-boot/P2Build.c:7145
> Please submit a full bug report, with preprocessed source (by using
> -freport-bug).
>
> The problem is that no line number is reported.  Is there a gm2 option
> that allows me to narrow it done?  (The module is 300 lines long.)
>
> Sincerely,
> john

Hi John,

there isn't an option - but this is a good idea to introduce one.  If
you are stuck - you could try:

$ gm2 -fdebug-function-line-numbers hello.mod

after you've added the following patch:

=================================================
diff --git a/gcc/m2/gm2-compiler/P2Build.bnf b/gcc/m2/gm2-compiler/P2Build.bnf
index d69ce2cf17e..ed094d86313 100644
--- a/gcc/m2/gm2-compiler/P2Build.bnf
+++ b/gcc/m2/gm2-compiler/P2Build.bnf
@@ -52,6 +52,7 @@ FROM M2Reserved IMPORT tokToTok, toktype, NulTok, ImportTok, 
ExportTok, Qualifie
 FROM DynamicStrings IMPORT String, InitString, KillString, Mark, ConCat, 
ConCatChar ;
 FROM M2Printf IMPORT printf0 ;
 FROM M2Debug IMPORT Assert ;
+FROM M2Options IMPORT DebugFunctionLineNumbers ;
 
 FROM M2Quads IMPORT PushT, PopT, PushTF, PopTF, PopNothing, OperandT, PushTFA, 
Top, Annotate,
                     PushTFtok, PopTFtok, PushTFAtok, PopTtok, PushTtok,
@@ -365,6 +366,10 @@ BEGIN
       IF Pass1
       THEN
          PeepToken(stopset0, stopset1, stopset2)
+      END ;
+      IF DebugFunctionLineNumbers
+      THEN
+         ErrorArray ('{%O}pass 2 trace')
       END
    ELSE
       MissingToken(t)
=================================================

$ rm build/gcc/m2/gm2-compiler-boot/P2Build.*
$ make && make install

This will generate a trace of each token during pass 2

regards,
Gaius