gcc: Support only the latest branch releases of gcc

This change, as per #222, reduces the number of supported releases of
gcc to the latest branch releases.

I noticed while doing this work that gcc-4.5.4 was never added, so I
moved patches for gcc-4.5.3 to 4.5.4 and updated the
bfin-unknown-linux-uclibc example. Also, 120-siginfo.patch was fixed
upstream in the 4.5.4 release, so this patch is omitted.

I also bumped the avr sample to 4.9.3 from 4.9.2.

With the addition of gcc-5.x, the gcc release team now releases the
major.minor.0 versions, while updates to the branch are available in
svn/git. We'll address that when we get to issue #219. This change just
removes CC_GCC_5_1 and moves CC_GCC_5_2 to CC_GCC_5, and removes
CC_GCC_5_1_or_later and moves CC_GCC_5_2_or_later to CC_GCC_5_or_later.

This is the first of two part changes, as mentioned in #222.
This change is slated for release in 1.22.0. The next change will be
slated for 1.23.0, and will limit gcc versions to what is on
https://gcc.gnu.org under "Release Series and Status", which is
currently 4.9.3 and 5.2.0, although I will also support the previous
supported version. In this example that would be 4.8.5.

Last, but not least, this change also retires AVR32 support.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

1 files changed, 0 insertions, 91 deletions

diff --git a/patches/gcc/4.7.0/100-PR52734-tree-ssa-tail-merge.patch b/patches/gcc/4.7.0/100-PR52734-tree-ssa-tail-merge.patch
deleted file mode 100644
index 5df5431..0000000
--- a/patches/gcc/4.7.0/100-PR52734-tree-ssa-tail-merge.patch
+++ /dev/null
@@ -1,91 +0,0 @@
-------------------------------------------------------------------------
-r186424 | vries | 2012-04-13 18:44:18 +0200 (Fri, 13 Apr 2012) | 12 lines
-
-2012-04-13  Tom de Vries  <tom@codesourcery.com>
-
-	Backport from mainline r186418.
-
-	2012-04-13  Tom de Vries  <tom@codesourcery.com>
-
-	* tree-ssa-tail-merge.c (gsi_advance_bw_nondebug_nonlocal): Add
-	parameters vuse and vuse_escaped.
-	(find_duplicate): Init vuse1, vuse2 and vuse_escaped.  Pass to
-	gsi_advance_bw_nondebug_nonlocal.  Return if vuse_escaped and
-	vuse1 != vuse2.
-
-------------------------------------------------------------------------
-Index: gcc/tree-ssa-tail-merge.c
-===================================================================
---- gcc-4.7.0/gcc/tree-ssa-tail-merge.c	(revision 186423)
-+++ gcc-4.7.0/gcc/tree-ssa-tail-merge.c	(revision 186424)
-@@ -1123,18 +1123,31 @@
-     }
- }
- 
--/* Let GSI skip backwards over local defs.  */
-+/* Let GSI skip backwards over local defs.  Return the earliest vuse in VUSE.
-+   Return true in VUSE_ESCAPED if the vuse influenced a SSA_OP_DEF of one of the
-+   processed statements.  */
- 
- static void
--gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi)
-+gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi, tree *vuse,
-+				  bool *vuse_escaped)
- {
-   gimple stmt;
-+  tree lvuse;
- 
-   while (true)
-     {
-       if (gsi_end_p (*gsi))
- 	return;
-       stmt = gsi_stmt (*gsi);
-+
-+      lvuse = gimple_vuse (stmt);
-+      if (lvuse != NULL_TREE)
-+	{
-+	  *vuse = lvuse;
-+	  if (!ZERO_SSA_OPERANDS (stmt, SSA_OP_DEF))
-+	    *vuse_escaped = true;
-+	}
-+
-       if (!(is_gimple_assign (stmt) && local_def (gimple_get_lhs (stmt))
- 	    && !gimple_has_side_effects (stmt)))
- 	return;
-@@ -1150,9 +1163,11 @@
- {
-   gimple_stmt_iterator gsi1 = gsi_last_nondebug_bb (bb1);
-   gimple_stmt_iterator gsi2 = gsi_last_nondebug_bb (bb2);
-+  tree vuse1 = NULL_TREE, vuse2 = NULL_TREE;
-+  bool vuse_escaped = false;
- 
--  gsi_advance_bw_nondebug_nonlocal (&gsi1);
--  gsi_advance_bw_nondebug_nonlocal (&gsi2);
-+  gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1, &vuse_escaped);
-+  gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2, &vuse_escaped);
- 
-   while (!gsi_end_p (gsi1) && !gsi_end_p (gsi2))
-     {
-@@ -1161,13 +1176,20 @@
- 
-       gsi_prev_nondebug (&gsi1);
-       gsi_prev_nondebug (&gsi2);
--      gsi_advance_bw_nondebug_nonlocal (&gsi1);
--      gsi_advance_bw_nondebug_nonlocal (&gsi2);
-+      gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1, &vuse_escaped);
-+      gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2, &vuse_escaped);
-     }
- 
-   if (!(gsi_end_p (gsi1) && gsi_end_p (gsi2)))
-     return;
- 
-+  /* If the incoming vuses are not the same, and the vuse escaped into an
-+     SSA_OP_DEF, then merging the 2 blocks will change the value of the def,
-+     which potentially means the semantics of one of the blocks will be changed.
-+     TODO: make this check more precise.  */
-+  if (vuse_escaped && vuse1 != vuse2)
-+    return;
-+
-   if (dump_file)
-     fprintf (dump_file, "find_duplicates: <bb %d> duplicate of <bb %d>\n",
- 	     bb1->index, bb2->index);