re PR target/39942 (Nonoptimal code - leaveq; xchg %ax,%ax; retq)

	PR target/39942
	* config/i386/x86-64.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Don't emit second
	.p2align 3 if MAX_SKIP is smaller than 7.
	* config/i386/linux.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Likewise.

From-SVN: r147606

gcc/ChangeLog

+2009-05-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/39942
+	* config/i386/x86-64.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Don't emit second
+	.p2align 3 if MAX_SKIP is smaller than 7.
+	* config/i386/linux.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Likewise.
+
 2009-05-15  Ian Lance Taylor  <iant@google.com>
 
 	* alias.c (struct alias_set_entry_d): Rename from struct

gcc/config/i386/linux.h

 /* Definitions for Intel 386 running Linux-based GNU systems with ELF format.
    Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2004, 2005,
-   2006, 2007, 2008 Free Software Foundation, Inc.
+   2006, 2007, 2008, 2009 Free Software Foundation, Inc.
    Contributed by Eric Youngdale.
    Modified for stabs-in-ELF by H.J. Lu.
 
@@ -153,7 +153,9 @@ along with GCC; see the file COPYING3.  If not see
 	fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
 	/* Make sure that we have at least 8 byte alignment if > 8 byte \
 	   alignment is preferred.  */					\
-	if ((LOG) > 3 && (1 << (LOG)) > ((MAX_SKIP) + 1))		\
+	if ((LOG) > 3							\
+	    && (1 << (LOG)) > ((MAX_SKIP) + 1)				\
+	    && (MAX_SKIP) >= 7)						\
 	  fprintf ((FILE), "\t.p2align 3\n");				\
       }									\
     }									\

gcc/config/i386/x86-64.h

@@ -74,7 +74,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 	fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
 	/* Make sure that we have at least 8 byte alignment if > 8 byte \
 	   alignment is preferred.  */					\
-	if ((LOG) > 3 && (1 << (LOG)) > ((MAX_SKIP) + 1))		\
+	if ((LOG) > 3							\
+	    && (1 << (LOG)) > ((MAX_SKIP) + 1)				\
+	    && (MAX_SKIP) >= 7)						\
 	  fprintf ((FILE), "\t.p2align 3\n");				\
       }									\
     }									\