reload.c (push_secondary_reload): Revert 2000-08-16 change.

        * reload.c (push_secondary_reload): Revert 2000-08-16 change.
        (find_reloads): Likewise.
        * config/alpha/alpha.md (reload_inqi): Revert 2000-08-11 change.
        (reload_inhi): Likewise.

From-SVN: r36028

3 files changed, 35 insertions, 21 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5e5f8e4..bec85cd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,12 @@
 2000-08-28  Richard Henderson  <rth@cygnus.com>
 
+	* reload.c (push_secondary_reload): Revert 2000-08-16 change.
+	(find_reloads): Likewise.
+	* config/alpha/alpha.md (reload_inqi): Revert 2000-08-11 change.
+	(reload_inhi): Likewise.
+
+2000-08-28  Richard Henderson  <rth@cygnus.com>
+
 	* config/i386/i386.c: Don't error on EXTRA_CONSTRAINT defined.
 	(call_insn_operand): Don't expect a surrounding mem.
 	(constant_call_address_operand): Likewise.
diff --git a/gcc/config/alpha/alpha.md b/gcc/config/alpha/alpha.md
index a869185..36d16c2 100644
--- a/gcc/config/alpha/alpha.md
+++ b/gcc/config/alpha/alpha.md
@@ -5343,11 +5343,11 @@
 (define_expand "reload_inqi"
   [(parallel [(match_operand:QI 0 "register_operand" "=r")
 	      (match_operand:QI 1 "any_memory_operand" "m")
-	      (match_operand:DI 2 "register_operand" "=&r")])]
+	      (match_operand:TI 2 "register_operand" "=&r")])]
   "! TARGET_BWX"
   "
 {
-  rtx seq;
+  rtx scratch, seq;
 
   if (GET_CODE (operands[1]) != MEM)
     abort ();
@@ -5361,8 +5361,16 @@
     {
       rtx addr;
 
+      /* It is possible that one of the registers we got for operands[2]
+	 might coincide with that of operands[0] (which is why we made
+	 it TImode).  Pick the other one to use as our scratch.  */
+      if (REGNO (operands[0]) == REGNO (operands[2]))
+	scratch = gen_rtx_REG (DImode, REGNO (operands[2]) + 1);
+      else
+	scratch = gen_rtx_REG (DImode, REGNO (operands[2]));
+
       addr = get_unaligned_address (operands[1], 0);
-      seq = gen_unaligned_loadqi (operands[0], addr, operands[2],
+      seq = gen_unaligned_loadqi (operands[0], addr, scratch,
 			  gen_rtx_REG (DImode, REGNO (operands[0])));
       alpha_set_memflags (seq, operands[1]);
     }
@@ -5373,11 +5381,11 @@
 (define_expand "reload_inhi"
   [(parallel [(match_operand:HI 0 "register_operand" "=r")
 	      (match_operand:HI 1 "any_memory_operand" "m")
-	      (match_operand:DI 2 "register_operand" "=&r")])]
+	      (match_operand:TI 2 "register_operand" "=&r")])]
   "! TARGET_BWX"
   "
 {
-  rtx seq;
+  rtx scratch, seq;
 
   if (GET_CODE (operands[1]) != MEM)
     abort ();
@@ -5391,8 +5399,16 @@
     {
       rtx addr;
 
+      /* It is possible that one of the registers we got for operands[2]
+	 might coincide with that of operands[0] (which is why we made
+	 it TImode).  Pick the other one to use as our scratch.  */
+      if (REGNO (operands[0]) == REGNO (operands[2]))
+	scratch = gen_rtx_REG (DImode, REGNO (operands[2]) + 1);
+      else
+	scratch = gen_rtx_REG (DImode, REGNO (operands[2]));
+
       addr = get_unaligned_address (operands[1], 0);
-      seq = gen_unaligned_loadhi (operands[0], addr, operands[2],
+      seq = gen_unaligned_loadhi (operands[0], addr, scratch,
 			  gen_rtx_REG (DImode, REGNO (operands[0])));
       alpha_set_memflags (seq, operands[1]);
     }
diff --git a/gcc/reload.c b/gcc/reload.c
index e2eccf6..bf9c5ec 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -400,8 +400,6 @@ push_secondary_reload (in_p, x, opnum, optional, reload_class, reload_mode,
 	  t_icode = icode;
 	  icode = CODE_FOR_nothing;
 	}
-
-      secondary_type = in_p ? RELOAD_FOR_INPUT : RELOAD_FOR_OUTPUT;
     }
 
   /* This case isn't valid, so fail.  Reload is allowed to use the same
@@ -3930,11 +3928,8 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
   for (i = 0; i < n_reloads; i++)
     {
       if (rld[i].secondary_p
-	  && rld[i].when_needed == operand_type[rld[i].opnum]
-          && (operand_reloadnum[rld[i].opnum] < 0
-	      || (rld[operand_reloadnum[rld[i].opnum]].secondary_in_icode == -1
-		  && rld[operand_reloadnum[rld[i].opnum]].secondary_out_icode == -1)))
-	  rld[i].when_needed = address_type[rld[i].opnum];
+	  && rld[i].when_needed == operand_type[rld[i].opnum])
+	rld[i].when_needed = address_type[rld[i].opnum];
 
       if ((rld[i].when_needed == RELOAD_FOR_INPUT_ADDRESS
 	   || rld[i].when_needed == RELOAD_FOR_OUTPUT_ADDRESS
@@ -3953,15 +3948,13 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
 	      int secondary_in_reload = rld[i].secondary_in_reload;
 
 	      rld[secondary_in_reload].when_needed
-		= (rld[i].secondary_in_icode == -1
-		   ? RELOAD_FOR_OPADDR_ADDR
-		   : RELOAD_FOR_OPERAND_ADDRESS);
+		= RELOAD_FOR_OPADDR_ADDR;
 
 	      /* If there's a tertiary reload we have to change it also.  */
 	      if (secondary_in_reload > 0
 		  && rld[secondary_in_reload].secondary_in_reload != -1)
 		rld[rld[secondary_in_reload].secondary_in_reload].when_needed
-		  = rld[secondary_in_reload].when_needed;
+		  = RELOAD_FOR_OPADDR_ADDR;
 	    }
 
 	  if ((rld[i].when_needed == RELOAD_FOR_OUTPUT_ADDRESS
@@ -3971,15 +3964,13 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
 	      int secondary_out_reload = rld[i].secondary_out_reload;
 
 	      rld[secondary_out_reload].when_needed
-		= (rld[i].secondary_out_icode == -1
-		   ? RELOAD_FOR_OPADDR_ADDR
-		   : RELOAD_FOR_OPERAND_ADDRESS);
+		= RELOAD_FOR_OPADDR_ADDR;
 
 	      /* If there's a tertiary reload we have to change it also.  */
 	      if (secondary_out_reload
 		  && rld[secondary_out_reload].secondary_out_reload != -1)
 		rld[rld[secondary_out_reload].secondary_out_reload].when_needed
-		  = rld[secondary_out_reload].when_needed;
+		  = RELOAD_FOR_OPADDR_ADDR;
 	    }
 
 	  if (rld[i].when_needed == RELOAD_FOR_INPADDR_ADDRESS