From: Richard Henderson <rth@redhat.com>
Date: Tue, 28 May 2002 20:29:43 +0000 (-0700)
Subject: i386.c (ix86_compute_frame_layout): Do not add bottom alignment for leaf functions.
X-Git-Tag: releases/gcc-3.1.1~248
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ffa1974d4634ab86631d9615f6e3043105468a3;p=thirdparty%2Fgcc.git

i386.c (ix86_compute_frame_layout): Do not add bottom alignment for leaf functions.

        * config/i386/i386.c (ix86_compute_frame_layout): Do not add
        bottom alignment for leaf functions.

From-SVN: r53966
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 831b5252ad7e..b3042f76770e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-05-28  Richard Henderson  <rth@redhat.com>
+
+	* config/i386/i386.c (ix86_compute_frame_layout): Do not add
+	bottom alignment for leaf functions.
+
 Mon May 27 10:37:28 CEST 2002  Jan Hubicka  <jh@suse.cz>
 
 	* reload.c (find_valid_class): Accept new argument DEST,
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 74297d04c01d..bf9fb6d57385 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4015,8 +4015,9 @@ ix86_compute_frame_layout (frame)
 
   offset += size;
 
-  /* Add outgoing arguments area.  */
-  if (ACCUMULATE_OUTGOING_ARGS)
+  /* Add outgoing arguments area.  Can be skipped if we eliminated
+     all the function calls as dead code.  */
+  if (ACCUMULATE_OUTGOING_ARGS && !current_function_is_leaf)
     {
       offset += current_function_outgoing_args_size;
       frame->outgoing_arguments_size = current_function_outgoing_args_size;
@@ -4024,9 +4025,12 @@ ix86_compute_frame_layout (frame)
   else
     frame->outgoing_arguments_size = 0;
 
-  /* Align stack boundary.  */
-  frame->padding2 = ((offset + preferred_alignment - 1)
-		     & -preferred_alignment) - offset;
+  /* Align stack boundary.  Only needed if we're calling another function.  */
+  if (!current_function_is_leaf)
+    frame->padding2 = ((offset + preferred_alignment - 1)
+		       & -preferred_alignment) - offset;
+  else
+    frame->padding2 = 0;
 
   offset += frame->padding2;