Re: rfc: constant pool and floats

[Aldy Hernandez <aldyh@redhat.com>]

> Aha!  So it should not do that.  I think the right thing to do is to 
> pass the original VALUE here, but if that doesn't work, try passing the 
> mode of VALUE instead of FIELDMODE (the mode of VALUE is the mode that 
> got passed to gen_lowpart).

Neato.  Passing the original value does the trick.

Bootstraped on powerpc-linux.

OK, pending on tests completion?

Aldy

	* expmed.c (store_bit_field): Pass original 'value' before
	recursing.

Index: expmed.c
===================================================================
RCS file: /cvs/uberbaum/gcc/expmed.c,v
retrieving revision 1.198
diff -c -p -r1.198 expmed.c
*** expmed.c	7 Oct 2004 05:56:51 -0000	1.198
--- expmed.c	18 Oct 2004 19:42:03 -0000
*************** store_bit_field (rtx str_rtx, unsigned H
*** 338,343 ****
--- 338,344 ----
    unsigned HOST_WIDE_INT bitpos = bitnum % unit;
    rtx op0 = str_rtx;
    int byte_offset;
+   rtx orig_value;
  
    enum machine_mode op_mode = mode_for_extraction (EP_insv, 3);
  
*************** store_bit_field (rtx str_rtx, unsigned H
*** 601,606 ****
--- 602,608 ----
       corresponding size.  This can occur on a machine with 64 bit registers
       that uses SFmode for float.  This can also occur for unaligned float
       structure fields.  */
+   orig_value = value;
    if (GET_MODE_CLASS (GET_MODE (value)) != MODE_INT
        && GET_MODE_CLASS (GET_MODE (value)) != MODE_PARTIAL_INT)
      value = gen_lowpart ((GET_MODE (value) == VOIDmode
*************** store_bit_field (rtx str_rtx, unsigned H
*** 667,673 ****
  	  /* Fetch that unit, store the bitfield in it, then store
  	     the unit.  */
  	  tempreg = copy_to_reg (op0);
! 	  store_bit_field (tempreg, bitsize, bitpos, fieldmode, value);
  	  emit_move_insn (op0, tempreg);
  	  return value;
  	}
--- 669,675 ----
  	  /* Fetch that unit, store the bitfield in it, then store
  	     the unit.  */
  	  tempreg = copy_to_reg (op0);
! 	  store_bit_field (tempreg, bitsize, bitpos, fieldmode, orig_value);
  	  emit_move_insn (op0, tempreg);
  	  return value;
  	}