Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

[mmitchel]

Synopsis: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

State-Changed-From-To: analyzed->closed
State-Changed-By: mmitchel
State-Changed-When: Mon Mar 31 20:34:33 2003
State-Changed-Why:
    Not a bug.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10017

Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

[rth]

Synopsis: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

Responsible-Changed-From-To: unassigned->rth
Responsible-Changed-By: rth
Responsible-Changed-When: Mon Mar 31 21:10:49 2003
Responsible-Changed-Why:
    Analysis for the "not a bug" result:
    http://gcc.gnu.org/ml/gcc-patches/2003-03/msg02568.html

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10017

Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

[Janis Johnson]

The following reply was made to PR optimization/10017; it has been noted by GNATS.

From: Janis Johnson <janis187@us.ibm.com>
To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, qboosh@pld.org.pl,
   nobody@gcc.gnu.org, gcc-prs@gcc.gnu.org
Cc:  
Subject: Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a 
 register to spill in class `GENERAL_REGS'
Date: Tue, 25 Mar 2003 11:44:56 -0800

 This is the patch that introduced the regression (yeah, I know,
 this information probably isn't the least bit useful):
 
 Wed Sep  1 21:13:48 1999  Richard Henderson  <rth@cygnus.com>
 
         Merge new ia32 backend from the branch!
 
         * i386.h, i386.c, i386.md, reg-stack.c, i386/unix.h: Many
 changes.
         See ChangeLog.P2 on new_ia32_branch for details.
 
         * rtl.h (stack_regs_mentioned_p): Delete prototype.
         * i386/cygwin.h (SUBTARGET_PROLOGUE): No more do_rtl.
         * i386/win32.h (SUBTARGET_PROLOGUE): Likewise.
         * i386/gas.h (ASM_FILE_START): Define.
         * i386/winnt.c (i386_pe_valid_decl_attribute_p): Update
         for name change of ix86_valid_decl_attribute_p.
         (i386_pe_valid_type_attribute_p): Similarly.
 
 The hunt used Volker's reduced testcase with -march=i686 on
 i686-pc-linux-gnu.
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10017
 
 
 

Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

[Steven Bosscher]

The following reply was made to PR optimization/10017; it has been noted by GNATS.

From: Steven Bosscher <s.bosscher@student.tudelft.nl>
To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, qboosh@pld.org.pl,
	nobody@gcc.gnu.org, gcc-prs@gcc.gnu.org
Cc:  
Subject: Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find
 a register to spill in class `GENERAL_REGS'
Date: Tue, 25 Mar 2003 09:32:50 +0100

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10017
 
 May be related to PR 9929.  The proposed fix
 there doesn't fix this problem though.
 
 Greetz
 Steven
 
 

Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a register to spill in class `GENERAL_REGS'

[Volker Reichelt]

The following reply was made to PR optimization/10017; it has been noted by GNATS.

From: Volker Reichelt <reichelt@igpm.rwth-aachen.de>
To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, qboosh@pld.org.pl
Cc:  
Subject: Re: optimization/10017: [3.2/3.3/3.4 regression] ICE: unable to find a
 register to spill in class `GENERAL_REGS'
Date: Mon, 10 Mar 2003 22:04:33 +0100 (CET)

 Here's a reduced testcase:
 
 ---------------------------------snip here---------------------------
 void      foo (long long i);
 long long bar (int *p);
 
 void baz()
 {
     static void *array[2] = { &&L0, &&L1 };
 
     register void *p asm ("esi");
     register int *q asm ("edi");
     register int *r asm ("ebx");
 
     for(;;)
     {
         L0: *q = *r; goto *p;
         L1: foo(bar(q) << *q);
     }
 }
 ---------------------------------snip here---------------------------
 
 It crashes every compiler version since 3.0, but compiles fine with gcc 2.95.x.
 (Just compile with "gcc -march=i686 -c".)
 
 (The problems with gcc 2.95.x concerning the original example seem to be a
 different issue.) Therefore, I rate this as a regression.
 
 The bug category is probably wrong, perhaps it is a middle-end bug
 or even inline-asm since the register variable have "asm" attached.
 Could somebody with more insight change the categeory?
 
 Regards,
 Volker
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10017