From: Jeffrey A Law <law@cygnus.com>
Date: Wed, 14 Jan 1998 00:24:33 +0000 (+0000)
Subject: loop.c (check_dbra_loop): Make sure initial value is a CONST_INT before trying to... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a8decb2c2b4be39f422c559227cc5bfccc438e60;p=gcc.git

loop.c (check_dbra_loop): Make sure initial value is a CONST_INT before trying to normalize it.

	* loop.c (check_dbra_loop): Make sure initial value is a
	CONST_INT before trying to normalize it.

From-SVN: r17352
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6483c61f2fb..6cf26de5b15 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jan 14 01:26:05 1998  Jeffrey A Law  (law@cygnus.com)
+
+	* loop.c (check_dbra_loop): Make sure initial value is a 
+	CONST_INT before trying to normalize it.
+
 Tue Jan 13 23:27:54 1998  Robert Lipe   (robertl@dgii.com)
 
 	* sco5.h (ASM_OUTPUT_SECTION_NAME): Refresh from ../svr4.h.
diff --git a/gcc/loop.c b/gcc/loop.c
index a26c04ac995..a3f276e2eec 100644
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -6214,10 +6214,11 @@ check_dbra_loop (loop_end, insn_count, loop_start)
 	      comparison_val = INTVAL (XEXP (comparison, 1));
 	      initial_value = bl->initial_value;
 		
-	      /* Normalize the initial value if it has no other use
-		 except as a counter.  This will allow a few more loops
-		 to be reversed.  */
-	      if (no_use_except_counting)
+	      /* Normalize the initial value if it is an integer and 
+		 has no other use except as a counter.  This will allow
+		 a few more loops to be reversed.  */
+	      if (no_use_except_counting
+		  && GET_CODE (initial_value) == CONST_INT)
 		{
 		  comparison_val = comparison_val - INTVAL (bl->initial_value);
 		  initial_value = const0_rtx;