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Date: Sat, 27 Oct 2007 17:17:00 -0000
Subject: [Bug c++/33925]  New: gcc -Waddress lost some useful warnings
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From: "mec at google dot com" <gcc-bugzilla@gcc.gnu.org>
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gcc -Waddress got a little bit worse between gcc 4.0.4 and gcc 4.1.2.  It would
be useful to get this warning, especially for C++ inline methods.

mec@hollerith:~/exp-address$ cat z2.cc
extern bool Alpha();
inline bool Beta(bool b) { return b; }
class MyClass { public: static bool MyMethod(bool b) { return b; } };

bool Gamma() {
 if (Alpha) {
   if (Beta) {
     if (MyClass::MyMethod) {
       return true;
     }
   }
 }
 return false;
}

mec@hollerith:~/exp-address$ /home/mec/gcc-4.0.4/install/bin/g++ -Wall -O2 -S
z2.cc
z2.cc: In function 'bool Gamma()':
z2.cc:6: warning: the address of 'bool Alpha()', will always evaluate as 'true'
z2.cc:7: warning: the address of 'bool Beta(bool)', will always evaluate as
'true'
z2.cc:8: warning: the address of 'static bool MyClass::MyMethod(bool)', will
always evaluate as 'true'

mec@hollerith:~/exp-address$ /home/mec/gcc-4.1.2/install/bin/g++ -Wall -O2 -S
z2.cc
z2.cc: In function 'bool Gamma()':
z2.cc:6: warning: the address of 'bool Alpha()', will always evaluate as 'true'

mec@hollerith:~/exp-address$ /home/mec/gcc-4.2.2/install/bin/g++ -Wall -O2 -S
z2.cc
z2.cc: In function 'bool Gamma()':
z2.cc:6: warning: the address of 'bool Alpha()' will always evaluate as 'true'

mec@hollerith:~/exp-address$ /home/mec/gcc-4.3-20071019/install/bin/g++ -Wall
-O2 -S z2.cc
z2.cc: In function 'bool Gamma()':
z2.cc:6: warning: the address of 'bool Alpha()' will always evaluate as 'true'

mec@hollerith:~/exp-address$


-- 
           Summary: gcc -Waddress lost some useful warnings
           Product: gcc
           Version: 4.2.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mec at google dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33925