From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 6 Jun 1995 01:49:58 +0000 (-0400)
Subject: (expand_block_move): Don't do any block moves where we clobber fixed numbers of regis... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1cab3be12477caa172c6e33cb417030af5d425c8;p=gcc.git

(expand_block_move): Don't do any block moves where we clobber fixed numbers of registers...

(expand_block_move): Don't do any block moves where we clobber fixed
numbers of registers, instead move just 1-8 bytes at a time.

From-SVN: r9884
---

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 5ae1507d01c..2adff2abd30 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -687,7 +687,7 @@ expand_block_move (operands)
      then don't generate more than 8 loads.  */
   if (TARGET_STRING)
     {
-      if (bytes > 64)
+      if (bytes > 4*8)
 	return 0;
     }
   else if (!STRICT_ALIGNMENT)
@@ -706,6 +706,8 @@ expand_block_move (operands)
     {
       for ( ; bytes > 0; bytes -= move_bytes)
 	{
+#if 0
+	  /* XXX Don't move so many bytes right now, it causes the compiler to not bootstrap */
 	  if (bytes > 24		/* move up to 32 bytes at a time */
 	      && !fixed_regs[5]
 	      && !fixed_regs[6]
@@ -748,7 +750,9 @@ expand_block_move (operands)
 					    GEN_INT (move_bytes),
 					    align_rtx));
 	    }
-	  else if (bytes > 4 && !TARGET_64BIT)
+	  else
+#endif
+	    if (bytes > 4 && !TARGET_64BIT)
 	    {			/* move up to 8 bytes at a time */
 	      move_bytes = (bytes > 8) ? 8 : bytes;
 	      emit_insn (gen_movstrsi_2reg (dest_reg,