From: Ulrich Weigand <uweigand@de.ibm.com>
Date: Thu, 9 Sep 2004 21:57:50 +0000 (+0000)
Subject: combine.c (try_combine): When swapping i2 and i3...
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0b21d1dcf96c37da406c3720814b0bb5b5450929;p=gcc.git

combine.c (try_combine): When swapping i2 and i3...

	* combine.c (try_combine): When swapping i2 and i3, newi2pat may be
	a PARALLEL instead of a SET due to added clobbers.

From-SVN: r87255
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 34f6e6abc13..0d27f66352a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-09-09  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* combine.c (try_combine): When swapping i2 and i3, newi2pat may be
+	a PARALLEL instead of a SET due to added clobbers.
+
 2004-09-09  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* reload.c (find_reloads_address): Pass correct operand to 
diff --git a/gcc/combine.c b/gcc/combine.c
index 6f1ce6c2759..24ebbc97147 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -2615,7 +2615,13 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p)
 	 The simplest way to remove the link is to point it at I1,
 	 which we know will be a NOTE.  */
 
-      ni2dest = SET_DEST (newi2pat);
+      /* newi2pat is usually a SET here; however, recog_for_combine might
+	 have added some clobbers.  */
+      if (GET_CODE (newi2pat) == PARALLEL)
+	ni2dest = SET_DEST (XVECEXP (newi2pat, 0, 0));
+      else
+	ni2dest = SET_DEST (newi2pat);
+
       for (insn = NEXT_INSN (i3);
 	   insn && (this_basic_block->next_bb == EXIT_BLOCK_PTR
 		    || insn != BB_HEAD (this_basic_block->next_bb));