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patches/gcc/4.2.1/260-flatten-switch-stmt-00.patch
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Tue Mar 11 22:11:43 2014 +0100 (2014-03-11)
changeset 3293 e11a8a2e225d
parent 313 2f223aafc7cb
permissions -rw-r--r--
comptools: do not force build of make-3.81 unless really needed

On systems with make-3.82, we forcibly force the build and the use
of make-3.81

But some newer tools break when building with make-3.81. For example,
eglibc-3.18 breaks.

Introduce a new blind options that tools may select if they require
make-3.81. If the system does not have make-3.81, and this option is
selected, then we force the build of make-3.81. Otherwise, we leave
it to the user to decide on his own.

Note that no component selects this option for now. It will come in
later patches as we find them.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> 
     1 diff -durN gcc-4.2.1.orig/gcc/stmt.c gcc-4.2.1/gcc/stmt.c

     2 --- gcc-4.2.1.orig/gcc/stmt.c	2007-07-19 05:25:32.000000000 +0200

     3 +++ gcc-4.2.1/gcc/stmt.c	2007-08-03 20:37:19.000000000 +0200

     4 @@ -2512,7 +2512,11 @@

     5  	  use_cost_table

     6  	    = (TREE_CODE (orig_type) != ENUMERAL_TYPE

     7  	       && estimate_case_costs (case_list));

     8 -	  balance_case_nodes (&case_list, NULL);

     9 +	  /* When optimizing for size, we want a straight list to avoid

    10 +	     jumps as much as possible. This basically creates an if-else

    11 +	     chain.  */

    12 +	  if (!optimize_size)

    13 +	    balance_case_nodes (&case_list, NULL);

    14  	  emit_case_nodes (index, case_list, default_label, index_type);

    15  	  emit_jump (default_label);

    16  	}

    17 @@ -3070,6 +3074,7 @@

    18  	    {

    19  	      if (!node_has_low_bound (node, index_type))

    20  		{

    21 +		  if (!optimize_size) /* don't jl to the .default_label. */

    22  		  emit_cmp_and_jump_insns (index,

    23  					   convert_modes

    24  					   (mode, imode,
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