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Message-Id: <199912210445.WAA08356@hp2.xraylith.wisc.edu>
To: Alexey Voinov <voins AT caravan DOT ru>
cc: cygwin AT sourceware DOT cygnus DOT com
Subject: Re: flex & gcc 2.95.2 
In-reply-to: Your message of "Tue, 21 Dec 1999 07:25:22 +0300."
             <10309 DOT 991221 AT caravan DOT ru> 
Date: Mon, 20 Dec 1999 22:45:05 -0600
From: Mumit Khan <khan AT NanoTech DOT Wisc DOT EDU>

Alexey Voinov <voins AT caravan DOT ru> writes:
> Hi!
> 
> I think I found bug in gcc 2.95.2 code generation.
> 
> look at flex generated code( flex -oyylex2.cc yylex2.y ):
> ----------------------------
> .
> .
> .
> static void *yy_flex_alloc YY_PROTO(( yy_size_t ));
> static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t ));
> .
> .
> .
> #ifdef YY_USE_PROTOS
> static void *yy_flex_alloc( yy_size_t size )
> #else
> static void *yy_flex_alloc( size )
> yy_size_t size;
> #endif
> {
> .
> .
> .
> #ifdef YY_USE_PROTOS
> static void *yy_flex_realloc( void *ptr, yy_size_t size )
> #else
> static void *yy_flex_realloc( ptr, size )
> void *ptr;
> yy_size_t size;
> #endif
> {
> .
> .
> .
> ----------------------------
> and now assembler code generated by( g++ -S yylex2.cc )
> .
> .
> .
> .def    _yy_flex_alloc__FUi AT 4;  .scl    2;      .type   32;     .endef
> _yy_flex_alloc__FUi AT 4:
>                    ^^^ why???
> .
> .
> .
> .def    _yy_flex_realloc__FPvUi;        .scl    3;      .type   32;     .ende
> f
> _yy_flex_realloc__FPvUi:
> .
> .
> .
> ----------------------------
> I cannot understand why @4 appended to yy_flex_alloc and not appended to
> yy_flex_realloc. Functions definitions look same to me.
> All calls to yy_flex_alloc are right ( call _yy_flex_alloc__FUi )
> 

Thanks for your bug report.

It's a bug in the C++ parser, and I've submitted a bug report on this.
Unfortunately, folks who're more familiar with C++ parser than I have
not yet looked at this problem.

See 

   Linkname: (C++) parser bug in handling fn attributes
   URL: http://gcc.gnu.org/ml/gcc-bugs/1999-11/msg00084.html

for a 5-line testcase that demonstrates the bug.

Regards,
Mumit


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