From: John Hassey <hassey@gnu.org>
Date: Tue, 23 Feb 1993 02:10:03 +0000 (+0000)
Subject: (output_call): Don't use the delay slot of a bsr.n
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d4f8225ab778ea7989d56fdede19e8fc25f8026b;p=platform%2Fupstream%2Fgcc.git

(output_call): Don't use the delay slot of a bsr.n
to modify the return address, unless -O2 specified.

From-SVN: r3513
---

diff --git a/gcc/config/m88k/m88k.c b/gcc/config/m88k/m88k.c
index c4718fb..e2465e3 100644
--- a/gcc/config/m88k/m88k.c
+++ b/gcc/config/m88k/m88k.c
@@ -861,14 +861,20 @@ output_call (operands, addr)
 	  NOTE_LINE_NUMBER (jump) = NOTE_INSN_DELETED;
 	  NOTE_SOURCE_FILE (jump) = 0;
 
-	  /* If we loose, we must use the non-delay form.  This is unlikely
+	  /* We only do this optimization if -O2, modifying the value of
+	     r1 in the delay slot confuses debuggers and profilers on some
+	     systems.
+
+	     If we loose, we must use the non-delay form.  This is unlikely
 	     to ever happen.  If it becomes a problem, claim that a call
 	     has two delay slots and only the second can be filled with
 	     a jump.  */
 #ifdef AS_BUG_IMMEDIATE_LABEL /* The assembler restricts immediate values.  */
-	  if (! ADD_INTVAL (delta * 2))
+	  if (optimize < 2
+	      || ! ADD_INTVAL (delta * 2))
 #else
-	  if (! ADD_INTVAL (delta))
+	  if (optimize < 2
+	      || ! ADD_INTVAL (delta))
 #endif
 	    {
 	      operands[1] = dest;