gcc-4.9: import patch fixing compilation in thumb mode

Import patch fixing a bug that caused ICE when compiling some packages
(e.g. ICU) in Thumb-1 model.

(From OE-Core rev: 68062674b853af750d0fdafb06090ed2f75fa0a4)

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0067-fix-arm-thumb.patch b/meta/recipes-devtools/gcc/gcc-4.9/0067-fix-arm-thumb.patch
new file mode 100644
index 0000000000..2f262e3a3a
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.9/0067-fix-arm-thumb.patch
@@ -0,0 +1,39 @@
+Upstream-Status: Accepted
+
+Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+---
+
+2015-11-25  Vladimir Makarov  <vmakarov@redhat.com>
+
+        PR rtl-optimization/67954
+        * lra-constraints.c (curr_insn_transform): Add check on scratch
+        pseudo when change class to NO_REGS.  Add an assert.
+
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230894 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
+diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
+index 4670e81..c62bf6a 100644
+--- a/gcc/lra-constraints.c
++++ b/gcc/lra-constraints.c
+@@ -3725,7 +3725,8 @@ curr_insn_transform (bool check_only_p)
+                 assigment pass and the scratch pseudo will be
+                 spilled.  Spilled scratch pseudos are transformed
+                 back to scratches at the LRA end.  */
+-             && lra_former_scratch_operand_p (curr_insn, i))
++             && lra_former_scratch_operand_p (curr_insn, i)
++             && lra_former_scratch_p (REGNO (op)))
+            {
+              int regno = REGNO (op);
+              lra_change_class (regno, NO_REGS, "      Change to", true);
+@@ -3734,6 +3735,8 @@ curr_insn_transform (bool check_only_p)
+                   spilled pseudo as there is only one such insn, the
+                   current one.  */
+                reg_renumber[regno] = -1;
++             lra_assert (bitmap_single_bit_set_p
++                         (&lra_reg_info[REGNO (op)].insn_bitmap));
+            }
+          /* We can do an optional reload.  If the pseudo got a hard
+             reg, we might improve the code through inheritance.  If