patches/gcc/4.4.6/190-flatten-switch-stmt-00.patch
author David Holsgrove <david.holsgrove@xilinx.com>
Thu Oct 04 13:26:14 2012 +1000 (2012-10-04)
changeset 3075 aadd4647dd91
parent 2149 98b7806295cc
permissions -rw-r--r--
scripts/functions: add a generic custom location infrastructure

Add a generic custom location infrastructure (inspired by the one in
kernel/linux) to allow the user to use custom tarballs or directories
for any component.

Signed-off-by: "David Holsgrove" <david.holsgrove@xilinx.com>
[yann.morin.1998@free.fr: move config option, improve help text, fix API doc]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <131c163c69f9cc81d2be.1349931191@localhost.localdomain>
PatchWork-Id: 190784
Message-Id: <0bbaba9190a76ba97f72.1349931192@localhost.localdomain>
PatchWork-Id: 190785
yann@2149
     1
diff -durN gcc-4.4.5.orig/gcc/stmt.c gcc-4.4.5/gcc/stmt.c
yann@2149
     2
--- gcc-4.4.5.orig/gcc/stmt.c	2010-03-08 12:46:28.000000000 +0100
yann@2149
     3
+++ gcc-4.4.5/gcc/stmt.c	2010-10-09 23:01:01.000000000 +0200
yann@2149
     4
@@ -2377,7 +2377,11 @@
yann@2149
     5
 	  use_cost_table
yann@2149
     6
 	    = (TREE_CODE (orig_type) != ENUMERAL_TYPE
yann@2149
     7
 	       && estimate_case_costs (case_list));
yann@2149
     8
-	  balance_case_nodes (&case_list, NULL);
yann@2149
     9
+	  /* When optimizing for size, we want a straight list to avoid
yann@2149
    10
+	     jumps as much as possible. This basically creates an if-else
yann@2149
    11
+	     chain.  */
yann@2149
    12
+	  if (!optimize_size)
yann@2149
    13
+	    balance_case_nodes (&case_list, NULL);
yann@2149
    14
 	  emit_case_nodes (index, case_list, default_label, index_type);
yann@2149
    15
 	  if (default_label)
yann@2149
    16
 	    emit_jump (default_label);
yann@2149
    17
@@ -2943,6 +2947,7 @@
yann@2149
    18
 	    {
yann@2149
    19
 	      if (!node_has_low_bound (node, index_type))
yann@2149
    20
 		{
yann@2149
    21
+		  if (!optimize_size) /* don't jl to the .default_label. */
yann@2149
    22
 		  emit_cmp_and_jump_insns (index,
yann@2149
    23
 					   convert_modes
yann@2149
    24
 					   (mode, imode,