From: Jim Wilson <wilson@cygnus.com>
Date: Thu, 22 Oct 1998 22:37:03 +0000 (+0000)
Subject: Fix v850 build problem stemming from Joern's reload patch.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9324411a50ae8a1dd51eac8c93ff251ba063915f;p=gcc.git

Fix v850 build problem stemming from Joern's reload patch.

	* v850/v850.c (v850_reorg): Call alter_subreg.  Delete subreg support.

From-SVN: r23234
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 23b3802564d..cb9dd65aa47 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Thu Oct 22 22:34:42 1998  Jim Wilson  <wilson@cygnus.com>
+
+	* v850/v850.c (v850_reorg): Call alter_subreg.  Delete subreg support.
+
 Fri Oct 23 11:11:56 1998  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
 
 	* rtl.def (POST_MODIFY, PRE_MODIFY): New generalized operators for
diff --git a/gcc/config/v850/v850.c b/gcc/config/v850/v850.c
index 8afb2f3dcfc..319b6ab9086 100644
--- a/gcc/config/v850/v850.c
+++ b/gcc/config/v850/v850.c
@@ -1260,6 +1260,14 @@ void v850_reorg (start_insn)
 	      /* Memory operands are signed by default.  */
 	      int unsignedp = FALSE;
 
+	      /* We might have (SUBREG (MEM)) here, so just get rid of the
+		 subregs to make this code simpler.  It is safe to call
+		 alter_subreg any time after reload.  */
+	      if (GET_CODE (dest) == SUBREG)
+		dest = alter_subreg (dest);
+	      if (GET_CODE (src) == SUBREG)
+		src = alter_subreg (src);
+
 	      if (GET_CODE (dest) == MEM && GET_CODE (src) == MEM)
 		mem = NULL_RTX;
 
@@ -1312,20 +1320,13 @@ void v850_reorg (start_insn)
 
 	      /* Loading up a register in the basic block zaps any savings
 		 for the register */
-	      if (GET_CODE (dest) == REG || GET_CODE (dest) == SUBREG)
+	      if (GET_CODE (dest) == REG)
 		{
 		  enum machine_mode mode = GET_MODE (dest);
-		  int word = 0;
 		  int regno;
 		  int endregno;
 
-		  while (GET_CODE (dest) == SUBREG)
-		    {
-		      word = SUBREG_WORD (dest);
-		      dest = SUBREG_REG (dest);
-		    }
-
-		  regno = REGNO (dest) + word;
+		  regno = REGNO (dest);
 		  endregno = regno + HARD_REGNO_NREGS (regno, mode);
 
 		  if (!use_ep)