altivec fixed and call used regs

[Aldy Hernandez]

hi david.

this will fix the ICE about VRSAVE.  it sets VRSAVE to call used, and
fixed.

the altivec regs should also be fixed/call_used when not generating
altivec code.  this is also fixed.

regarding the other ICE while bootstrapping, i'm going to take a look,
but i don't think it's altivec related.  the tree also seems to be
broken in more ways than one... ("@" in dwarf info labels, etc).

ok to install?

2001-11-08  Aldy Hernandez  <aldyh@redhat.com>

	* rs6000.h (REG_CLASS_CONTENTS): Add VRSAVE bit to ALL_REGS.
	(CONDITIONAL_REGISTER_USAGE): Disable AltiVec registers unless
	generating altivec code.
	(FIXED_REGISTERS): VRSAVE is fixed.
	(CALL_USED_REGISTERS): VRSAVE is call used.

Index: config/rs6000/rs6000.h
===================================================================
RCS file: /cvs/uberbaum/gcc/config/rs6000/rs6000.h,v
retrieving revision 1.134
diff -c -p -r1.134 rs6000.h
*** rs6000.h	2001/11/08 22:46:23	1.134
--- rs6000.h	2001/11/09 21:42:28
*************** extern int rs6000_debug_arg;		/* debug a
*** 687,693 ****
     /* AltiVec registers.  */			   \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
!    0						   \
  }
  
  /* 1 for registers not available across function calls.
--- 687,693 ----
     /* AltiVec registers.  */			   \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
!    1						   \
  }
  
  /* 1 for registers not available across function calls.
*************** extern int rs6000_debug_arg;		/* debug a
*** 706,712 ****
     /* AltiVec registers.  */			   \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
!    0						   \
  }
  
  
--- 706,712 ----
     /* AltiVec registers.  */			   \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
!    1						   \
  }
  
  
*************** extern int rs6000_debug_arg;		/* debug a
*** 923,934 ****
      global_regs[PIC_OFFSET_TABLE_REGNUM]				\
        = fixed_regs[PIC_OFFSET_TABLE_REGNUM]				\
          = call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;			\
    if (TARGET_ALTIVEC_ABI)						\
!     {									\
!       fixed_regs[VRSAVE_REGNO] = call_used_regs[VRSAVE_REGNO] = 1;	\
!       for (i = FIRST_ALTIVEC_REGNO; i < FIRST_ALTIVEC_REGNO + 20; ++i)	\
!         call_used_regs[i] = 1;						\
!     }									\
  }
  
  /* Specify the registers used for certain standard purposes.
--- 923,934 ----
      global_regs[PIC_OFFSET_TABLE_REGNUM]				\
        = fixed_regs[PIC_OFFSET_TABLE_REGNUM]				\
          = call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;			\
+   if (! TARGET_ALTIVEC)							\
+     for (i = FIRST_ALTIVEC_REGNO; i <= LAST_ALTIVEC_REGNO; ++i)		\
+       fixed_regs[i] = call_used_regs[i] = 1;				\
    if (TARGET_ALTIVEC_ABI)						\
!     for (i = FIRST_ALTIVEC_REGNO; i < FIRST_ALTIVEC_REGNO + 20; ++i)	\
!       call_used_regs[i] = 1;						\
  }
  
  /* Specify the registers used for certain standard purposes.
*************** enum reg_class
*** 1068,1074 ****
    { 0x00000000, 0x00000000, 0x00000ff0, 0x00000000 }, /* CR_REGS */	     \
    { 0xffffffff, 0x00000000, 0x0000ffff, 0x00000000 }, /* NON_FLOAT_REGS */   \
    { 0x00000000, 0x00000000, 0x00010000, 0x00000000 }, /* XER_REGS */	     \
!   { 0xffffffff, 0xffffffff, 0xffffffff, 0x0001ffff }  /* ALL_REGS */	     \
  }
  
  /* The same information, inverted:
--- 1068,1074 ----
    { 0x00000000, 0x00000000, 0x00000ff0, 0x00000000 }, /* CR_REGS */	     \
    { 0xffffffff, 0x00000000, 0x0000ffff, 0x00000000 }, /* NON_FLOAT_REGS */   \
    { 0x00000000, 0x00000000, 0x00010000, 0x00000000 }, /* XER_REGS */	     \
!   { 0xffffffff, 0xffffffff, 0xffffffff, 0x0003ffff }  /* ALL_REGS */	     \
  }
  
  /* The same information, inverted: