gcc-4.6.0: Bring in patches from FSF 4.6 branch

This brings in new patches from 4.6 release branch
updates the comment section of existing branch to not
contain patch numbers.

Tested build on qemu for arm ppc mips x86 and x86_64

Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0311-PR-middle-end-48973.patch b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0311-PR-middle-end-48973.patch
new file mode 100644
index 000000000..c6aa27062
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0311-PR-middle-end-48973.patch
@@ -0,0 +1,101 @@
+From ec0109fe82032e869880728da5b026a89c64473f Mon Sep 17 00:00:00 2001
+From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Mon, 23 May 2011 10:24:47 +0000
+Subject: [PATCH] 	PR middle-end/48973
+ 	* expr.c (expand_expr_real_2) <case LT_EXPR>: If do_store_flag
+ 	failed and the comparison has a single bit signed type, use
+ 	constm1_rtx instead of const1_rtx for true value.
+ 	(do_store_flag): If ops->type is single bit signed type, disable
+ 	signel bit test optimization and pass -1 instead of 1 as last
+ 	parameter to emit_store_flag_force.
+
+	* gcc.c-torture/execute/pr48973-1.c: New test.
+	* gcc.c-torture/execute/pr48973-2.c: New test.
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@174063 138bc75d-0d04-0410-961f-82ee72b054a4
+
+index 1de0ce4..9a81754 100644
+--- a/gcc/expr.c
++++ b/gcc/expr.c
+@@ -8134,7 +8134,10 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode,
+       op1 = gen_label_rtx ();
+       jumpifnot_1 (code, treeop0, treeop1, op1, -1);
+ 
+-      emit_move_insn (target, const1_rtx);
++      if (TYPE_PRECISION (type) == 1 && !TYPE_UNSIGNED (type))
++	emit_move_insn (target, constm1_rtx);
++      else
++	emit_move_insn (target, const1_rtx);
+ 
+       emit_label (op1);
+       return target;
+@@ -10088,7 +10091,8 @@ do_store_flag (sepops ops, rtx target, enum machine_mode mode)
+ 
+   if ((code == NE || code == EQ)
+       && TREE_CODE (arg0) == BIT_AND_EXPR && integer_zerop (arg1)
+-      && integer_pow2p (TREE_OPERAND (arg0, 1)))
++      && integer_pow2p (TREE_OPERAND (arg0, 1))
++      && (TYPE_PRECISION (ops->type) != 1 || TYPE_UNSIGNED (ops->type)))
+     {
+       tree type = lang_hooks.types.type_for_mode (mode, unsignedp);
+       return expand_expr (fold_single_bit_test (loc,
+@@ -10108,7 +10112,9 @@ do_store_flag (sepops ops, rtx target, enum machine_mode mode)
+ 
+   /* Try a cstore if possible.  */
+   return emit_store_flag_force (target, code, op0, op1,
+-			        operand_mode, unsignedp, 1);
++				operand_mode, unsignedp,
++				(TYPE_PRECISION (ops->type) == 1
++				 && !TYPE_UNSIGNED (ops->type)) ? -1 : 1);
+ }
+ 
+ 
+new file mode 100644
+index 0000000..02688a0
+--- /dev/null
++++ b/gcc/testsuite/gcc.c-torture/execute/pr48973-1.c
+@@ -0,0 +1,20 @@
++/* PR middle-end/48973 */
++
++extern void abort (void);
++struct S { int f : 1; } s;
++int v = -1;
++
++void
++foo (unsigned int x)
++{
++  if (x != -1U)
++    abort ();
++}
++
++int
++main ()
++{
++  s.f = (v & 1) > 0;
++  foo (s.f);
++  return 0;
++}
+diff --git a/gcc/testsuite/gcc.c-torture/execute/pr48973-2.c b/gcc/testsuite/gcc.c-torture/execute/pr48973-2.c
+new file mode 100644
+index 0000000..a64d491
+--- /dev/null
++++ b/gcc/testsuite/gcc.c-torture/execute/pr48973-2.c
+@@ -0,0 +1,14 @@
++/* PR middle-end/48973 */
++
++extern void abort (void);
++struct S { int f : 1; } s;
++int v = -1;
++
++int
++main ()
++{
++  s.f = v < 0;
++  if ((unsigned int) s.f != -1U)
++    abort ();
++  return 0;
++}
+-- 
+1.7.0.4
+