patches/gcc/4.2.3/260-flatten-switch-stmt-00.patch
author Cody Schafer <dev@codyps.com>
Fri May 09 19:13:49 2014 -0700 (2014-05-09)
changeset 3312 4876ff97e039
parent 431 8bde4c6ea47a
permissions -rw-r--r--
cc/gcc: allow CC_EXTRA_CONFIG_ARRAY on baremetal

The final bare-metal compiler is built using the core backend.
Currently the core uses the CC_CORE_EXTRA_CONFIG_ARRAY variable.

While this works as supposed to, this can leave the user puzzled
in the menuconfig, since all he can see is the core options, not
the final options.

Only show the core options if any of the core passes are needed,
and use the final options in the core-backend if we're issuing
the bare-metal compiler.

Signed-off-by: Cody P Schafer <dev@codyps.com>
[yann.morin.1998@free.fr: hide core options if no core pass needed;
use final option in core backend if issuing the bare-metal compiler]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <22181e546ba746202489.1399688067@localhost>
Patchwork-Id: 347586
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,