patches/gcc/4.2.2/260-flatten-switch-stmt-00.patch
author "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
Mon Apr 16 15:25:36 2012 +0200 (2012-04-16)
changeset 2941 13e40098fffc
parent 431 8bde4c6ea47a
permissions -rw-r--r--
cc/gcc: update Linaro GCC revisions to 2012.04

Update Linaro GCC with the latest available revisions.

The 4.7 revision is also released, but the infrastructure is not yet ready for
it in CT-NG.

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
yann@313
     1
diff -durN gcc-4.2.1.orig/gcc/stmt.c gcc-4.2.1/gcc/stmt.c
yann@313
     2
--- gcc-4.2.1.orig/gcc/stmt.c	2007-07-19 05:25:32.000000000 +0200
yann@313
     3
+++ gcc-4.2.1/gcc/stmt.c	2007-08-03 20:37:19.000000000 +0200
yann@313
     4
@@ -2512,7 +2512,11 @@
yann@313
     5
 	  use_cost_table
yann@313
     6
 	    = (TREE_CODE (orig_type) != ENUMERAL_TYPE
yann@313
     7
 	       && estimate_case_costs (case_list));
yann@313
     8
-	  balance_case_nodes (&case_list, NULL);
yann@313
     9
+	  /* When optimizing for size, we want a straight list to avoid
yann@313
    10
+	     jumps as much as possible. This basically creates an if-else
yann@313
    11
+	     chain.  */
yann@313
    12
+	  if (!optimize_size)
yann@313
    13
+	    balance_case_nodes (&case_list, NULL);
yann@313
    14
 	  emit_case_nodes (index, case_list, default_label, index_type);
yann@313
    15
 	  emit_jump (default_label);
yann@313
    16
 	}
yann@313
    17
@@ -3070,6 +3074,7 @@
yann@313
    18
 	    {
yann@313
    19
 	      if (!node_has_low_bound (node, index_type))
yann@313
    20
 		{
yann@313
    21
+		  if (!optimize_size) /* don't jl to the .default_label. */
yann@313
    22
 		  emit_cmp_and_jump_insns (index,
yann@313
    23
 					   convert_modes
yann@313
    24
 					   (mode, imode,