Path: utzoo!telly!ddsw1!lll-winken!uunet!tut.cis.ohio-state.edu!PARIS.ICS.UCI.EDU!schmidt%crimee.ics.uci.edu
From: schmidt%crimee.ics.uci.edu@PARIS.ICS.UCI.EDU ("Douglas C. Schmidt")
Newsgroups: gnu.g++.bug
Subject: g++ 1.32 fails to give warning for erroneous assignments
Message-ID: <8901011321.aa03698@PARIS.ICS.UCI.EDU>
Date: 1 Jan 89 21:13:23 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 38


Hi,

   The following demonstrates two problems with g++ 1.32:
   
----------------------------------------   
main ( int, char *[ ] ) {
   unsigned int i = -1000; // should give a warning
   char a = 103203.9e1;    // generates illegal asm output
}
----------------------------------------

AT&T cfront 1.2.1 gives the following error diagnostics for this:

----------------------------------------
CC  test.C:
"test.C", line 4: warning: negative initializer for unsigned i
"test.C", line 4: warning:  double  assigned to char 
----------------------------------------

However, g++ 1.32 gives no compiler diagnostics, but generates erroneous
assembly code:

----------------------------------------
g++ version 1.32.0
 /usr/public/lib/g++/gcc-cpp -+ -v -I/cd/ua/schmidt/include/ -undef
-D__GNU__ -D__GNUG__ -Dsparc -Dsun -Dunix test.C /tmp/cca06645.cpp
GNU CPP version 1.32
 /usr/public/lib/g++/gcc-c++ /tmp/cca06645.cpp -quiet -dumpbase test.C
-fstrength-reduce -finline-functions -fmemoize-lookups -fsave-memoized
-fchar-charconst -noreg -version -o /tmp/cca06645.s
GNU C++ version 1.32.0 (sparc) compiled by GNU C version 1.31.
 as /tmp/cca06645.s -o test.o
as: "/tmp/cca06645.s", line 14: error: constant value must be between
-4096 and 4095
----------------------------------------

Doug