From: Richard Henderson <rth@redhat.com>
Date: Thu, 10 Apr 2003 22:17:36 +0000 (-0700)
Subject: re PR rtl-optimization/10352 (ICE in find_reloads_toplev)
X-Git-Tag: releases/gcc-3.2.3~26
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9de9ea4b19da2382a4bf738d25078e0f9b4826e;p=thirdparty%2Fgcc.git

re PR rtl-optimization/10352 (ICE in find_reloads_toplev)

        PR opt/10352
        Tue Jul 23 21:49:24 2002  J"orn Rennecke <joern.rennecke@superh.com>
        * simplify-rtx.c (simplify_subreg): When converting to a non-int
        mode, try to convert to an integer mode of matching size first.
	* g++.dg/opt/reload2.C: New.

From-SVN: r65441
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 95bc948fe15c..1e7b58270aa2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-04-09  Richard Henderson  <rth@redhat.com>
+
+	PR opt/10352
+	Tue Jul 23 21:49:24 2002  J"orn Rennecke <joern.rennecke@superh.com>
+	* simplify-rtx.c (simplify_subreg): When converting to a non-int
+	mode, try to convert to an integer mode of matching size first.
+
 2003-04-09  Alan Modra  <amodra@bigpond.net.au>
 
 	* config/rs6000/rs6000.c (rs6000_emit_prologue): Use correct mode to
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 2896041c4fd9..afd2b3c5d704 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -2484,6 +2484,20 @@ simplify_subreg (outermode, op, innermode, byte)
 	    return new;
 	}
 
+      if (GET_MODE_CLASS (outermode) != MODE_INT
+	  && GET_MODE_CLASS (outermode) != MODE_CC)
+	{
+	  enum machine_mode new_mode = int_mode_for_mode (outermode);
+
+	  if (new_mode != innermode || byte != 0)
+	    {
+	      op = simplify_subreg (new_mode, op, innermode, byte);
+	      if (! op)
+		return NULL_RTX;
+	      return simplify_subreg (outermode, op, new_mode, 0);
+	    }
+	}
+
       offset = byte * BITS_PER_UNIT;
       switch (GET_CODE (op))
 	{