From: DJ Delorie <dj@redhat.com>
Date: Thu, 12 Sep 2013 17:06:38 +0000 (-0400)
Subject: cfgexpand.c (expand_debug_expr): Avoid sign-extending SImode to PSImode.
X-Git-Tag: upstream/12.2.0~67919
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8369f38a6f3f797952452dc25cd148909e049ee6;p=platform%2Fupstream%2Fgcc.git

cfgexpand.c (expand_debug_expr): Avoid sign-extending SImode to PSImode.

* cfgexpand.c (expand_debug_expr): Avoid sign-extending SImode to
PSImode.

From-SVN: r202534
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0acde62..de4bb3d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2013-09-12  DJ Delorie  <dj@redhat.com>
+
+	* cfgexpand.c (expand_debug_expr): Avoid sign-extending SImode to
+	PSImode.
+
 2013-09-12  Martin Jambor  <mjambor@suse.cz>
 
 	PR ipa/58389
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c
index 4f10361..88e48c2 100644
--- a/gcc/cfgexpand.c
+++ b/gcc/cfgexpand.c
@@ -3154,7 +3154,12 @@ expand_debug_expr (tree exp)
 	  && GET_MODE (op0) != VOIDmode && GET_MODE (op1) != VOIDmode
 	  && GET_MODE (op0) != GET_MODE (op1))
 	{
-	  if (GET_MODE_BITSIZE (GET_MODE (op0)) < GET_MODE_BITSIZE (GET_MODE (op1)))
+	  if (GET_MODE_BITSIZE (GET_MODE (op0)) < GET_MODE_BITSIZE (GET_MODE (op1))
+	      /* If OP0 is a partial mode, then we must truncate, even if it has
+		 the same bitsize as OP1 as GCC's representation of partial modes
+		 is opaque.  */
+	      || (GET_MODE_CLASS (GET_MODE (op0)) == MODE_PARTIAL_INT
+		  && GET_MODE_BITSIZE (GET_MODE (op0)) == GET_MODE_BITSIZE (GET_MODE (op1))))
 	    op1 = simplify_gen_unary (TRUNCATE, GET_MODE (op0), op1,
 				      GET_MODE (op1));
 	  else