Re: middle-end/1557: Regrename macro not documented

Re: middle-end/1557: Regrename macro not documented

[rodrigc]

Synopsis: Regrename macro not documented

State-Changed-From-To: open->closed
State-Changed-By: rodrigc
State-Changed-When: Sat Feb 23 15:57:59 2002
State-Changed-Why:
    RENAME_EXTENDED_BLOCKS macro removed:
    2002-01-05  Craig Rodrigues  <crodrigu@bbn.com>
     
            PR middle-end/1557
            * config/ia64/ia64.h (RENAME_EXTENDED_BLOCKS): Remove.
    
    
    More documentation for HARD_REGNO_RENAME_OK added, for
    example in arm.h:
    /* Interrupt functions can only use registers that have already been
       saved by the prologue, even if they would normally be
       call-clobbered.  */
    #define HARD_REGNO_RENAME_OK(SRC, DST)

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=1557

Re: middle-end/1557: Regrename macro not documented

[Richard Henderson]

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The following reply was made to PR middle-end/1557; it has been noted by GNATS.

From: Richard Henderson <rth@redhat.com>
To: Richard Earnshaw <rearnsha@arm.com>
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: middle-end/1557: Regrename macro not documented
Date: Sat, 6 Jan 2001 02:12:30 -0800

 On Fri, Jan 05, 2001 at 11:24:07AM +0000, Richard Earnshaw wrote:
 > 	/* Define this macro if the compiler should use extended basic blocks
 > 	   when renaming registers.  Define this macro if the target has 
 > 	   predicate registers.  */
 > 
 > 	#define RENAME_EXTENDED_BLOCKS
 > 
 > 	However, the latter seems to be unused.
 
 It was used before Bernd and I rewrote the pass the last time.
 This macro should go away now...
 
 
 
 r~
>From hyrosen@mail.com Sun Apr 01 00:00:00 2001
From: hyrosen@mail.com
To: gcc-gnats@gcc.gnu.org
Subject: c++/1784: Internal error: Segmentation Fault when optimizing
Date: Sun, 01 Apr 2001 00:00:00 -0000
Message-id: <20010126180650.3338.qmail@sourceware.cygnus.com>
X-SW-Source: 2001-q1/msg00739.html
Content-length: 1325

>Number:         1784
>Category:       c++
>Synopsis:       Internal error: Segmentation Fault when optimizing
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 26 10:16:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Hyman Rosen
>Release:        gcc version 2.97 20010124 (experimental)
>Organization:
>Environment:
Compile with 'g++ -O3'.
>Description:
The following code makes the compiler segfault when compiled with -O3.

template <class T> class Q;
template <class T> struct N { };
template <class T> struct QI { QI (Q<T> &, int = 0); N<T> *c; Q<T> &q; };
template <class T> struct Q { QI<T> e (); };
template <class T> QI<T> Q<T>::e () { return QI<T> (*this, 1); }
template <class T> QI<T>::QI (Q<T> &q, int) : q(q) { }
struct V { int c (void); unsigned a; char *b; unsigned l; Q<char *> q; };
int
V::c (void)
{
                                               ;
  if (a <= 0) return -1;
  delete [] b;
  try { b = new char[l + a]; }
  catch (...) { }
  QI<char *> iter (q);
  char **arg;
  char *ptr = b;
  unsigned len;
  int more = 0;
  *ptr = '\0';
  return 0;
}
template class Q<char *>;
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
>From bkoz@gc Sun Apr 01 00:00:00 2001
From: bkoz@gc
To: egcs@cygnus.com
Cc: gcc-prs@gcc.gnu.org
Subject: Re: libstdc++/1884
Date: Sun, 01 Apr 2001 00:00:00 -0000
X-SW-Source: 2001-q1/msg02344.html
Content-length: 74

The following reply was made to PR libstdc++/1884; it has been noted by G
>From mattias@virtutech.se Sun Apr 01 00:00:00 2001
From: mattias@virtutech.se
To: gcc-gnats@gcc.gnu.org
Cc: gustav@virtutech.se
Subject: c++/1760: inline asm: "=m" output doesn't force operand in memory
Date: Sun, 01 Apr 2001 00:00:00 -0000
Message-id: <20010124171217.31490.qmail@sourceware.cygnus.com>
X-SW-Source: 2001-q1/msg00671.html
Content-length: 1253

>Number:         1760
>Category:       c++
>Synopsis:       inline asm: "=m" output doesn't force operand in memory
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 24 09:16:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Mattias Engdegård
>Release:        g++ version 2.97 20010120 (experimental), generating code for x86 on x86
>Organization:
>Environment:
linux 2.2, glibc 2.1.3
>Description:
Specifying an output operand as "=m" does not seem to force
the operand to be in memory. The code below results in the
errors

urk.c:6: output number 0 not directly addressable
urk.c:6: inconsistent operand constraints in an `asm'

when compiled with g++ -O2 :

typedef unsigned long long uint64;
uint64 fstps(void)
{
	uint64 ret;
	asm volatile("fstps %0" : "=m" (ret));
	return ret;
}

Compiling with gcc instead of g++, removing -O2, or declaring
'ret' as volatile are workarounds.
>How-To-Repeat:
Compile with g++ -O2 :

typedef unsigned long long uint64;
uint64 fstps(void)
{
	uint64 ret;
	asm volatile("fstps %0" : "=m" (ret));
	return ret;
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
>From dlr@cs.cmu.edu Sun Apr 01 00:00:00 2001
From: dlr@cs.cmu.edu
To: gcc-gnats@gcc.gnu.org
Subject: c++/1899: Omitting template arg gives "Internal compiler error"
Date: Sun, 01 Apr 2001 00:00:00 -0000
Message-id: <20010207060814.6125.qmail@sourceware.cygnus.com>
X-SW-Source: 2001-q1/msg01015.html
Content-length: 9065

>Number:         1899
>Category:       c++
>Synopsis:       Omitting template arg gives "Internal compiler error"
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 06 22:16:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     dlr@cs.cmu.edu
>Release:        g++ 2.95.3
>Organization:
>Environment:
Debian GNU/Linux Woody, kernel 2.4.0, libstdc++ 2.10 (taken from the CVS gcc-2_95-branch, dated 20010101).
>Description:
I expected the attached .ii file to generate this error:

> use of class template `template <class _Tp> multiplies<_Tp>' as expression

But instead I get an internal compiler error:

> g++ -v -save-temps broken.C
Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.3/specs
gcc version 2.95.3 20010125 (prerelease)
 /usr/lib/gcc-lib/i386-linux/2.95.3/cpp0 -lang-c++ -v -D__GNUC__=2 -D__GNUG__=2 
-D__GNUC_MINOR__=95 -D__cplusplus -D__ELF__ -Dunix -D__i386__ -Dlinux -D__ELF__ 
-D__unix__ -D__i386__ -D__linux__ -D__unix -D__linux -Asystem(posix) -D__EXCEPTI
ONS -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ broken.C broken.ii
GNU CPP version 2.95.3 20010125 (prerelease) (i386 Linux/ELF)
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc-lib/i386-linux/2.95.3/../../../../include/g++-3
 /usr/local/include
 /usr/lib/gcc-lib/i386-linux/2.95.3/include
 /usr/include
End of search list.
The following default directories have been omitted from the search path:
 /usr/lib/gcc-lib/i386-linux/2.95.3/../../../../i386-linux/include
End of omitted list.
 /usr/lib/gcc-lib/i386-linux/2.95.3/cc1plus broken.ii -quiet -dumpbase broken.cc
 -version -o broken.s
GNU C++ version 2.95.3 20010125 (prerelease) (i386-linux) compiled by GNU C vers
ion 2.95.3 20010125 (prerelease).
broken.C: In function `int main()':
broken.C:5: Internal compiler error.
broken.C:5: Please submit a full bug report.
broken.C:5: See <URL: http://www.gnu.org/software/gcc/bugs.html > for instructions
.
Exit 1


I understand that fixing bugs on broken code is a low priority.  I didn't see this in the frequently reported bugs list, though, so I thought I should submit it. :)
Thanks,
David
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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>From rodrigc@gcc.gnu.org Sun Apr 01 00:00:00 2001
From: rodrigc@gcc.gnu.org
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org
Subject: Re: c++/1029
Date: Sun, 01 Apr 2001 00:00:00 -0000
Message-id: <20010311181601.24154.qmail@sourceware.cygnus.com>
X-SW-Source: 2001-q1/msg02211.html
Content-length: 671

The following reply was made to PR c++/1029; it has been noted by GNATS.

From: rodrigc@gcc.gnu.org
To: Peter.Bienstman@rug.ac.be, gcc-gnats@gcc.gnu.org, nobody@gcc.gnu.org
Cc:  
Subject: Re: c++/1029
Date: 11 Mar 2001 18:10:35 -0000

 Synopsis: ICE at -O3 in overloaded operator
 
 State-Changed-From-To: open->closed
 State-Changed-By: rodrigc
 State-Changed-When: Sun Mar 11 10:10:35 2001
 State-Changed-Why:
     Your testcase does not result in an internal compiler
     error in the GCC 3.0 branch.
     You may want to test it yourself at:
     http://www.codesourcery.com/gcc-compile.shtml
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=1029&database=gcc