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Article #1493

bug report 15: improper code generation

#1493
From: Kurt Baudendistel
Date: Tue, 11 Oct 1988 20:47
62 lines
2302 bytes
BUG REPORT 15

BEHAVIOR:

incorrect code generation on unsigned mixed length integer operations.

the following is output when the given program is run:

65536 = 0

COMPILER VERSION: GNU C++ compiler driver, version 1.25.0

INPUT FILES:

bug.cc
type.h

COMMAND LINE: g++ -v -g bug.cc 

 /usr/local/lib/gcc-cpp+ -v -I . -I ./include -I /dsp/mcclellan/baud/c++/include -I /usr/local/lib/g++-include -undef -D__GNU__ -D__GNUG__ -Dvax -Dunix bug.cc /tmp/cc027681.cpp
GNU CPP version 1.25.0
 /usr/local/lib/gcc-c++ /tmp/cc027681.cpp -quiet -dumpbase bug.cc -noreg -version -G -o /tmp/cc027681.s
 as /tmp/cc027681.s -o bug.o
 /usr/local/lib/gcc-ld++ -C /usr/lib/crt0+.o bug.o /dsp/mcclellan/baud/c++/lib/Complex.a /dsp/mcclellan/baud/c++/lib/Fft.a /dsp/mcclellan/baud/c++/lib/Filter.a /dsp/mcclellan/baud/c++/lib/Fix.a /dsp/mcclellan/baud/c++/lib/Lev.a /dsp/mcclellan/baud/c++/lib/Vec.a /dsp/mcclellan/baud/c++/lib/fixv.a /dsp/mcclellan/baud/c++/lib/nr.a /dsp/mcclellan/baud/c++/lib/usage.a /dsp/mcclellan/baud/c++/lib/z_error.a /usr/local/lib/libg++.a /usr/lib/libm.a -lg++ /usr/local/lib/gcc-gnulib+ -lg -lc

FILE NAMES:

tm.h = tm-vax.h
md = vax.md

MACHINE: vax 11/780 with BRL UNIX (4.2 BSD)

SOURCE FILES:
----------------------------------------------------------------------------
// bug.cc
#include <stream.h>
#include <type.h>
main() {
  uint16 x = 0;
  uint32 c = 1;
  uint32 a = ~x + c;
  cout << "65536 = " << a << "\n";
}
----------------------------------------------------------------------------
//
// type.h : machine type definitions
//

#ifndef TYPEH
#define TYPEH

typedef short int int16;
typedef long int int32;
typedef unsigned short int uint16;
typedef unsigned long int uint32;

typedef unsigned int uint;

typedef unsigned char byte;

#endif
----------------------------------------------------------------------------
Technical Details
Message-ID: <8810112056.AA25449@gatech.edu>
Path: arc1-ca.pugleaf.net!utzoo!telly!ddsw1!mcdchg!rutgers!mailrus!tut.cis.ohio-state.edu!GATECH.EDU!gt-eedsp!baud

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Path: arc1-ca.pugleaf.net!utzoo!telly!ddsw1!mcdchg!rutgers!mailrus!tut.cis.ohio-state.edu!GATECH.EDU!gt-eedsp!baud
From: gt-eedsp!baud@GATECH.EDU (Kurt Baudendistel)
Newsgroups: gnu.g++.bug
Subject: bug report 15: improper code generation
Message-ID: <8810112056.AA25449@gatech.edu>
Date: 11 Oct 88 20:47:36 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 62