patches/gcc/4.4.0/190-flatten-switch-stmt-00.patch
author Jang, Bongseo <graycells@gmail.com>
Sun Sep 23 11:18:30 2012 +0900 (2012-09-23)
changeset 3058 2800ef0ff450
permissions -rw-r--r--
libc/eglibc: Split changeset 3052:06b663f297 into eglibc/libc and eglibc/ports patches

crosstool-ng's glibc patche is made against glibc/libc sub-dir.
changeset 3052:06b663f297 is against glibc top-dir. it needs to split.

Signed-off-by: "Jang, Bongseo" <graycells@gmail.com>
[yann.morin.1998@free.fr: fix the ports patches depth]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-ID: <5040c8e83e35618361dc.1348370890@localhost.localdomain>
PatchWork-ID: 186177
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diff -durN gcc-4.4.0.orig/gcc/stmt.c gcc-4.4.0/gcc/stmt.c
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--- gcc-4.4.0.orig/gcc/stmt.c	2009-02-27 20:49:42.000000000 +0100
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+++ gcc-4.4.0/gcc/stmt.c	2009-05-27 21:38:21.000000000 +0200
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@@ -2376,7 +2376,11 @@
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 	  use_cost_table
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 	    = (TREE_CODE (orig_type) != ENUMERAL_TYPE
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 	       && estimate_case_costs (case_list));
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-	  balance_case_nodes (&case_list, NULL);
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+	  /* When optimizing for size, we want a straight list to avoid
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+	     jumps as much as possible. This basically creates an if-else
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+	     chain.  */
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+	  if (!optimize_size)
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+	    balance_case_nodes (&case_list, NULL);
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 	  emit_case_nodes (index, case_list, default_label, index_type);
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 	  if (default_label)
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 	    emit_jump (default_label);
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@@ -2942,6 +2946,7 @@
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 	    {
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 	      if (!node_has_low_bound (node, index_type))
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 		{
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+		  if (!optimize_size) /* don't jl to the .default_label. */
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 		  emit_cmp_and_jump_insns (index,
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 					   convert_modes
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 					   (mode, imode,