patches/gcc/4.4.4/190-flatten-switch-stmt-00.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Oct 12 23:47:24 2010 +0200 (2010-10-12)
branch1.8
changeset 2151 ee9ce2595560
parent 1948 d341be24dc68
permissions -rw-r--r--
cc/gcc: fix 4.4.4 patchset

Most patches contained two spurious first lines.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from ada9128c98b89569b54aefe9b7a4b0bd2bd20023)
yann@1948
     1
diff -durN gcc-4.4.4.orig/gcc/stmt.c gcc-4.4.4/gcc/stmt.c
yann@1948
     2
--- gcc-4.4.4.orig/gcc/stmt.c	2010-03-08 12:46:28.000000000 +0100
yann@1948
     3
+++ gcc-4.4.4/gcc/stmt.c	2010-05-16 19:12:31.000000000 +0200
yann@1948
     4
@@ -2377,7 +2377,11 @@
yann@1948
     5
 	  use_cost_table
yann@1948
     6
 	    = (TREE_CODE (orig_type) != ENUMERAL_TYPE
yann@1948
     7
 	       && estimate_case_costs (case_list));
yann@1948
     8
-	  balance_case_nodes (&case_list, NULL);
yann@1948
     9
+	  /* When optimizing for size, we want a straight list to avoid
yann@1948
    10
+	     jumps as much as possible. This basically creates an if-else
yann@1948
    11
+	     chain.  */
yann@1948
    12
+	  if (!optimize_size)
yann@1948
    13
+	    balance_case_nodes (&case_list, NULL);
yann@1948
    14
 	  emit_case_nodes (index, case_list, default_label, index_type);
yann@1948
    15
 	  if (default_label)
yann@1948
    16
 	    emit_jump (default_label);
yann@1948
    17
@@ -2943,6 +2947,7 @@
yann@1948
    18
 	    {
yann@1948
    19
 	      if (!node_has_low_bound (node, index_type))
yann@1948
    20
 		{
yann@1948
    21
+		  if (!optimize_size) /* don't jl to the .default_label. */
yann@1948
    22
 		  emit_cmp_and_jump_insns (index,
yann@1948
    23
 					   convert_modes
yann@1948
    24
 					   (mode, imode,