- rel 4

[packages/crossmingw32-gcc.git] / gcc-m68k-pic.patch

# DP: Two patches by Andreas Schwab to fix -fpic and loop optimization.
# DP: Another patch by Andreas Schwab to fix %a5 restauration in some cases.

------------------------------------------------------------------------------
--- gcc/config/m68k/m68k.c~	Mon Aug  2 06:51:08 1999
+++ gcc/config/m68k/m68k.c	Fri Oct 22 11:47:09 1999
@@ -356,7 +356,7 @@
       mask &= ~ (1 << (15 - FRAME_POINTER_REGNUM));
       num_saved_regs--;
     }
-  if (flag_pic && regs_ever_live[PIC_OFFSET_TABLE_REGNUM])
+  if (flag_pic && current_function_uses_pic_offset_table)
     {
       mask |= 1 << (15 - PIC_OFFSET_TABLE_REGNUM);
       num_saved_regs++;
@@ -493,7 +493,10 @@
   for (regno = 0 ; regno < FIRST_PSEUDO_REGISTER ; regno++)
     if (regs_ever_live[regno] && ! call_used_regs[regno])
       return 0;
-  
+
+  if (flag_pic && current_function_uses_pic_offset_table)
+    return 0;
+
   return 1;
 }
 
@@ -568,7 +571,7 @@
         nregs++;
 	mask |= 1 << regno;
       }
-  if (flag_pic && regs_ever_live[PIC_OFFSET_TABLE_REGNUM])
+  if (flag_pic && current_function_uses_pic_offset_table)
     {
       nregs++;
       mask |= 1 << PIC_OFFSET_TABLE_REGNUM;
@@ -1334,8 +1337,6 @@
 			     gen_rtx_PLUS (Pmode,
 					   pic_offset_table_rtx, orig));
       current_function_uses_pic_offset_table = 1;
-      if (reload_in_progress)
-	regs_ever_live[PIC_OFFSET_TABLE_REGNUM] = 1;
       RTX_UNCHANGING_P (pic_ref) = 1;
       emit_move_insn (reg, pic_ref);
       return reg;
--- gcc/loop.c~	Fri Jun 25 06:38:11 1999
+++ gcc/loop.c	Fri Oct 22 11:45:16 1999
@@ -4046,11 +4046,11 @@
 	         in-between when biv_toal_increment returns nonzero both times
 		 but we test it here in case some day some real cfg analysis
 		 gets used to set always_computable.  */
-	      && ((loop_insn_first_p (bl2->biv->insn, bl->biv->insn)
-		   && no_labels_between_p (bl2->biv->insn, bl->biv->insn))
-		  || (! reg_used_between_p (bl->biv->src_reg, bl->biv->insn,
-					    bl2->biv->insn)
-		      && no_jumps_between_p (bl->biv->insn, bl2->biv->insn)))
+	      && (loop_insn_first_p (bl2->biv->insn, bl->biv->insn)
+		  ? no_labels_between_p (bl2->biv->insn, bl->biv->insn)
+		  : (! reg_used_between_p (bl->biv->src_reg, bl->biv->insn,
+					   bl2->biv->insn)
+		     && no_jumps_between_p (bl->biv->insn, bl2->biv->insn)))
 	      && validate_change (bl->biv->insn,
 				  &SET_SRC (single_set (bl->biv->insn)),
 				  copy_rtx (src), 0))