Use pic_offset_table_rtx instead of rs6000_pic_register; Rewrite int/float…

Use pic_offset_table_rtx instead of rs6000_pic_register; Rewrite int/float conversions so reload allocates the temp

From-SVN: r11973

gcc/config/rs6000/rs6000.c

@@ -99,12 +99,6 @@ int rs6000_save_toc_p;
 /* ABI enumeration available for subtarget to use.  */
 enum rs6000_abi rs6000_current_abi;
 
-/* Temporary memory used to convert integer -> float */
-static rtx stack_temps[NUM_MACHINE_MODES];
-
-/* Current PIC register used by the V4 code */
-struct rtx_def *rs6000_pic_register = (struct rtx_def *)0;
-
 
 /* Default register names.  */
 char rs6000_reg_names[][8] =
@@ -1488,35 +1482,6 @@ expand_builtin_saveregs (args)
 }
 
 
-/* Allocate a stack temp.  Only allocate one stack temp per type for a
-   function.  */
-
-struct rtx_def *
-rs6000_stack_temp (mode, size)
-     enum machine_mode mode;
-     int size;
-{
-  rtx temp = stack_temps[ (int)mode ];
-  rtx addr;
-
-  if (temp == NULL_RTX)
-    {
-      temp = assign_stack_local (mode, size, 0);
-      addr = XEXP (temp, 0);
-
-      if ((size > 4 && !offsettable_address_p (0, mode, addr))
-	  || (size <= 4 && !memory_address_p (mode, addr)))
-	{
-	  XEXP (temp, 0) = copy_addr_to_reg (addr);
-	}
-
-      stack_temps[ (int)mode ] = temp;
-    }
-
-  return temp;
-}
-
-
 /* Generate a memory reference for expand_block_move, copying volatile,
    and other bits from an original memory reference.  */
 
@@ -3467,10 +3432,6 @@ output_epilog (file, size)
   int sp_offset = 0;
   int i;
 
-  /* Forget about any temporaries created */
-  for (i = 0; i < NUM_MACHINE_MODES; i++)
-    stack_temps[i] = NULL_RTX;
-
   /* If the last insn was a BARRIER, we don't have to write anything except
      the trace table.  */
   if (GET_CODE (insn) == NOTE)
@@ -3765,7 +3726,7 @@ output_epilog (file, size)
   /* Reset varargs and save TOC indicator */
   rs6000_sysv_varargs_p = 0;
   rs6000_save_toc_p = 0;
-  rs6000_pic_register = (rtx)0;
+  pic_offset_table_rtx = (rtx)0;
 
   if (DEFAULT_ABI == ABI_NT)
     {

gcc/config/rs6000/rs6000.h

@@ -1884,10 +1884,6 @@ typedef struct rs6000_args
 
 /* #define FINALIZE_PIC */
 
-/* Current PIC register used by the V4 code */
-extern struct rtx_def *rs6000_pic_register;
-
-
 /* A C expression that is nonzero if X is a legitimate immediate
    operand on the target machine when generating position independent
    code.  You can assume that X satisfies `CONSTANT_P', so you need

gcc/config/rs6000/rs6000.md

@@ -3573,54 +3573,29 @@
 }")
 
 (define_expand "move_to_float"
-  [(set (match_operand:DF 0 "gpc_reg_operand" "")
-	(unspec [(match_operand:SI 1 "gpc_reg_operand" "")
-		 (match_operand:SI 2 "gpc_reg_operand" "")
-		 (match_dup 3)] 2))]
+  [(set (match_dup 4)					;; low word
+	(match_operand:SI 1 "register_operand" ""))
+   (set (match_dup 5)					;; high word
+	(match_operand:SI 2 "register_operand" ""))
+   (set (match_operand:SI 0 "register_operand" "")	;; float value
+	(match_dup 3))]
   "! TARGET_POWERPC64 && TARGET_HARD_FLOAT"
   "
 {
-  operands[3] = XEXP (rs6000_stack_temp (DFmode, 8, 1), 0);
-}")
-
-(define_split
-  [(set (match_operand:DF 0 "gpc_reg_operand" "")
-	(unspec [(match_operand:SI 1 "gpc_reg_operand" "")
-		 (match_operand:SI 2 "gpc_reg_operand" "")
-		 (match_operand:SI 3 "offsettable_addr_operand" "")] 2))]
-  "reload_completed"
-  [(set (match_dup 4) (match_dup 1))
-   (set (match_dup 5) (match_dup 2))
-   (set (match_dup 0) (mem:DF (match_dup 3)))]
-  "
-{
-  rtx word1 = gen_rtx (MEM, SImode, operands[3]);
-  rtx word2 = gen_rtx (MEM, SImode, plus_constant (operands[3], 4));
-
-  MEM_IN_STRUCT_P (word1) = 1;
-  MEM_IN_STRUCT_P (word2) = 1;
+  operands[3] = gen_reg_rtx (DFmode);
 
   if (WORDS_BIG_ENDIAN)
     {
-      operands[4] = word2;
-      operands[5] = word1;
+      operands[4] = gen_rtx (SUBREG, SImode, operands[3], 1);
+      operands[5] = gen_rtx (SUBREG, SImode, operands[3], 0);
     }
   else
     {
-      operands[4] = word1;
-      operands[5] = word2;
+      operands[4] = gen_rtx (SUBREG, SImode, operands[3], 0);
+      operands[5] = gen_rtx (SUBREG, SImode, operands[3], 1);
     }
 }")
 
-(define_insn ""
-  [(set (match_operand:DF 0 "gpc_reg_operand" "=f")
-	(unspec [(match_operand:SI 1 "gpc_reg_operand" "r")
-		 (match_operand:SI 2 "gpc_reg_operand" "r")
-		 (match_operand:SI 3 "offsettable_addr_operand" "p")] 2))]
-  "! TARGET_POWERPC64 && TARGET_HARD_FLOAT"
-  "#"
-  [(set_attr "length" "12")])
-
 (define_expand "fix_truncdfsi2"
   [(set (match_operand:SI 0 "gpc_reg_operand" "")
 	(fix:SI (match_operand:DF 1 "gpc_reg_operand" "")))]
@@ -3629,13 +3604,12 @@
 {
   if (TARGET_POWER2 || TARGET_POWERPC)
     {
-      rtx stack_slot = rs6000_stack_temp (DImode, 8, 1);
-      rtx temp = gen_reg_rtx (DImode);
+      rtx temp1 = gen_reg_rtx (DImode);
+      rtx temp2 = gen_reg_rtx (SImode);
 
-      emit_insn (gen_fpcvtsi (temp, operands[1]));
-      emit_move_insn (stack_slot, temp);
-      emit_move_insn (operands[0],
-		      gen_rtx (SUBREG, SImode, stack_slot, WORDS_BIG_ENDIAN));
+      emit_insn (gen_fpcvtsi (temp1, operands[1]));
+      emit_move_insn (temp2, gen_rtx (SUBREG, SImode, temp1, WORDS_BIG_ENDIAN));
+      emit_move_insn (operands[0], temp2);
       DONE;
     }
   else
@@ -4824,13 +4798,13 @@
   "(DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && flag_pic"
   "
 {
-  if (!rs6000_pic_register)
+  if (!pic_offset_table_rtx)
     {
-      rs6000_pic_register = gen_reg_rtx (SImode);
-      emit_insn (gen_init_v4_pic (rs6000_pic_register));
+      pic_offset_table_rtx = gen_reg_rtx (SImode);
+      emit_insn (gen_init_v4_pic (pic_offset_table_rtx));
     }
 
-  operands[2] = rs6000_pic_register;
+  operands[2] = pic_offset_table_rtx;
   if (flag_pic > 1)
     {
       emit_insn (gen_movsi_got_large (operands[0], operands[1], operands[2]));