Many warnings when optimizing

[Dave Steffen <steffend at glitch dot physics dot colostate dot edu>]

Hi Folks,

   First of all, for the record, I'm using EGCS 1.0.1 on a HP-UX 9.05
   machine.

   So, an interesting thing just happened. When compiling my numerical
   code without any optimizations, everything was fine. However, I
   turn on optimization with -O, and I get several pages of warnings
   about things in the standard headers:


c++ -ansi -Wall -O -I/dsk2/opt/lib/TNT -I/dsk2/opt/lib/C++ -I/dsk2/opt/lib/C++/libg++ -c init.C
/dsk2/opt/include/g++/stl_vector.h: In function `void Initialize(int, char **)':
/dsk2/opt/include/g++/stl_vector.h:146: warning: `double * p' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_construct.h:45: warning: `void * place' might be used uninitialized in this function
init.C: In function `class vector<double,__default_alloc_template<false,0> > Parse_Etas(const char *)':
init.C:245: warning: `class vector<double,__default_alloc_template<false,0> > * this' might be used uninitialized in this function
init.C:245: warning: `const class vector<double,__default_alloc_template<false,0> > & x' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_vector.h:104: warning: `const class vector<double,__default_alloc_template<false,0> > * this' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_vector.h:104: warning: `const class vector<double,__default_alloc_template<false,0> > * this' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_vector.h:104: warning: `const class vector<double,__default_alloc_template<false,0> > * this' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_vector.h:104: warning: `const class vector<double,__default_alloc_template<false,0> > * this' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_vector.h:104: warning: `const double * last' might be used uninitialized in this function
/dsk2/opt/include/g++/stl_vector.h:104: warning: `const double * first' might be used uninitialized in this function


   ... and so on for a page or two. 

   The code compiled just fine, but having all these warnings is
   annoying -- particularly because there might be something in there
   that really _should_ trigger a warning, but I'd never see it in the
   midst of all the spurious warnings.

   Thought you might like to know.

   BTW, nice compiler! I'll post a few informal, but illuminating,
   test results to the egcs list in a few minutes.

--------------------------------------------------------------------------
Dave Steffen                      Wave after wave will flow with the tide
Dept. of Physics                    And bury the world as it does
Colorado State University         Tide after tide will flow and recede
steffend@lamar.colostate.edu        Leaving life to go on as it was...
							- Peart / RUSH
"The reason that our people suffer in this way.... 
is that our ancestors failed to rule wisely".   -General Choi, Hong Hi