Bug 14927

Bug 14927
* config/ia64/ia64.md (movxf): New local op0.  Handle case where
operands[0] is a SUBREG.  Handle case where operands[1] is a GR reg.

From-SVN: r81211

gcc/ChangeLog

+2004-04-26  James E Wilson  <wilson@specifixinc.com>
+
+	Bug 14927
+	* config/ia64/ia64.md (movxf): New local op0.  Handle case where
+	operands[0] is a SUBREG.  Handle case where operands[1] is a GR reg.
+
 2004-04-26  Zack Weinberg  <zack@codesourcery.com>
 
 	* config/ia64/hpux.h: Predefine __STDCPP__ when compiling C++.

gcc/config/ia64/ia64.md

@@ -677,12 +677,17 @@
 	(match_operand:XF 1 "general_operand" ""))]
   ""
 {
+  rtx op0 = operands[0];
+
+  if (GET_CODE (op0) == SUBREG)
+    op0 = SUBREG_REG (op0);
+
   /* We must support XFmode loads into general registers for stdarg/vararg
      and unprototyped calls.  We split them into DImode loads for convenience.
      We don't need XFmode stores from general regs, because a stdarg/vararg
      routine does a block store to memory of unnamed arguments.  */
-  if (GET_CODE (operands[0]) == REG
-      && GR_REGNO_P (REGNO (operands[0])))
+
+  if (GET_CODE (op0) == REG && GR_REGNO_P (REGNO (op0)))
     {
       /* We're hoping to transform everything that deals with XFmode
 	 quantities and GR registers early in the compiler.  */
@@ -695,16 +700,23 @@
 	  || (GET_CODE (operands[1]) == REG
 	      && GR_REGNO_P (REGNO (operands[1]))))
 	{
-	  emit_move_insn (gen_rtx_REG (TImode, REGNO (operands[0])),
-			  SUBREG_REG (operands[1]));
+	  rtx op1 = operands[1];
+
+	  if (GET_CODE (op1) == SUBREG)
+	    op1 = SUBREG_REG (op1);
+	  else
+	    /* ??? Maybe we should make a SUBREG here?  */
+	    op1 = gen_rtx_REG (TImode, REGNO (op1));
+
+	  emit_move_insn (gen_rtx_REG (TImode, REGNO (op0)), op1);
 	  DONE;
 	}
 
       if (GET_CODE (operands[1]) == CONST_DOUBLE)
 	{
-	  emit_move_insn (gen_rtx_REG (DImode, REGNO (operands[0])),
+	  emit_move_insn (gen_rtx_REG (DImode, REGNO (op0)),
 			  operand_subword (operands[1], 0, 0, XFmode));
-	  emit_move_insn (gen_rtx_REG (DImode, REGNO (operands[0]) + 1),
+	  emit_move_insn (gen_rtx_REG (DImode, REGNO (op0) + 1),
 			  operand_subword (operands[1], 1, 0, XFmode));
 	  DONE;
 	}
@@ -717,8 +729,8 @@
 	{
 	  rtx out[2];
 
-	  out[WORDS_BIG_ENDIAN] = gen_rtx_REG (DImode, REGNO (operands[0]));
-	  out[!WORDS_BIG_ENDIAN] = gen_rtx_REG (DImode, REGNO (operands[0])+1);
+	  out[WORDS_BIG_ENDIAN] = gen_rtx_REG (DImode, REGNO (op0));
+	  out[!WORDS_BIG_ENDIAN] = gen_rtx_REG (DImode, REGNO (op0) + 1);
 
 	  emit_move_insn (out[0], adjust_address (operands[1], DImode, 0));
 	  emit_move_insn (out[1], adjust_address (operands[1], DImode, 8));