target/7321: ice on vectors with -O3 and -m3dnow

[Andrew Pinski]

The following reply was made to PR target/7321; it has been noted by GNATS.

>From pinskia@physics.uc.edu  Mon Jan 13 00:56:42 2003
From: Andrew Pinski <pinskia@physics.uc.edu>
To: bangerth@dealii.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
   nobody@gcc.gnu.org, pinskia@physics.uc.edu, gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: target/7321: ice on vectors with -O3 and -m3dnow
Date: Fri, 10 Jan 2003 19:40:35 -0800

 This was reported when 3.3 was 3.2, also it still fails with -O3  
 -m3dnow on `3.4 20030110 (experimental)', remember the -O3.
 
 And yes it starts at the typedef.
 
 Error message from 3.4:
 vector.c: In function `tempf':
 vector.c:20: error: unable to find a register to spill in class  
 `FLOAT_REGS'
 vector.c:20: error: this is the insn:
 (insn:HI 29 27 30 0 0x400473f4 (set (reg:SF 8 st(0) [70])
          (minus:SF (subreg:SF (reg/v:DI 30 rmm1 [66]) 0)
              (subreg:SF (reg/v:DI 30 rmm1 [66]) 4))) 406  
 {*fop_sf_1_nosse} (insn_list 24 (nil))
      (expr_list:REG_EQUIV (mem:SF (reg/v/f:SI 2 ecx [60]) [3 S4 A32])
          (expr_list:REG_DEAD (reg/v:DI 30 rmm1 [66])
              (nil))))
 vector.c:20: internal compiler error: in spill_failure, at  
 reload1.c:1924
 
 Error Message from 3.3 20021216 (experimental) (i686-pc-linux-gnu):
 vector.c: In function `tempf':
 vector.c:20: error: unable to find a register to spill in class  
 `FLOAT_REGS'
 vector.c:20: error: this is the insn:
 (insn:HI 29 27 30 0 0x4004b2ec (set (reg:SF 8 st(0) [70])
          (minus:SF (subreg:SF (reg/v:DI 30 rmm1 [66]) 0)
              (subreg:SF (reg/v:DI 30 rmm1 [66]) 4))) 398  
 {*fop_sf_1_nosse} (insn_list 24 (nil))
      (expr_list:REG_EQUIV (mem:SF (reg/v/f:SI 2 ecx [60]) [3 S4 A32])
          (expr_list:REG_DEAD (reg/v:DI 30 rmm1 [66])
              (nil))))
 vector.c:20: internal compiler error: in spill_failure, at  
 reload1.c:1920
 
 It even fails on -O1 with the same error message.
 
 Thanks,
 Andrew Pinski
 
 On Friday, Jan 10, 2003, at 17:04 US/Pacific, bangerth@dealii.org wrote:
 
 > Synopsis: ice on vectors with -O3 and -m3dnow
 >
 > State-Changed-From-To: open->feedback
 > State-Changed-By: bangerth
 > State-Changed-When: Fri Jan 10 17:04:59 2003
 > State-Changed-Why:
 >     The testcase seems to have gotton somehow truncated. Does it
 >     start at the typedef in the middle of the field? I can't
 >     compile this with gcc3.2.x with this message:
 >     tmp/g> /home/bangerth/bin/gcc-3.2.2-pre/bin/gcc -c x.c -m3dnow
 >     x.c: In function `tempf':
 >     x.c:16: invalid operands to binary *
 >     x.c:17: invalid operands to binary *
 >
 >     However, it works cleanly with 3.3 and 3.4.
 >
 >     Thanks
 >       Wolfgang
 >
 > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit- 
 > trail&database=gcc&pr=7321
 >