Squashed 'yocto-poky/' content from commit ea562de
git-subtree-dir: yocto-poky
git-subtree-split: ea562de57590c966cd5a75fda8defecd397e6436
diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0055-dwarf-reg-processing-helper.patch b/meta/recipes-devtools/gcc/gcc-4.9/0055-dwarf-reg-processing-helper.patch
new file mode 100644
index 0000000..557dab0
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.9/0055-dwarf-reg-processing-helper.patch
@@ -0,0 +1,148 @@
+From 4fd39f1329379e00f958394adde6be96f0caf21f Mon Sep 17 00:00:00 2001
+From: hainque <hainque@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Fri, 5 Dec 2014 16:53:22 +0000
+Subject: [PATCH] 2014-12-05 Olivier Hainque <hainque@adacore.com>
+
+ * dwarf2cfi.c (init_one_dwarf_reg_size): New helper, processing
+ one particular reg for expand_builtin_init_dwarf_reg_sizes.
+ (expand_builtin_init_dwarf_reg_sizes): Rework to use helper and
+ account for dwarf register spans.
+
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218428 138bc75d-0d04-0410-961f-82ee72b054a4
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Backport [gcc 5.0]
+
+---
+ gcc/ChangeLog | 7 +++++
+ gcc/dwarf2cfi.c | 98 +++++++++++++++++++++++++++++++++++++++++++++------------
+ 2 files changed, 85 insertions(+), 20 deletions(-)
+
+Index: gcc-4.9.2/gcc/dwarf2cfi.c
+===================================================================
+--- gcc-4.9.2.orig/gcc/dwarf2cfi.c
++++ gcc-4.9.2/gcc/dwarf2cfi.c
+@@ -252,7 +252,59 @@ init_return_column_size (enum machine_mo
+ gen_int_mode (size, mode));
+ }
+
+-/* Generate code to initialize the register size table. */
++/* Datastructure used by expand_builtin_init_dwarf_reg_sizes and
++ init_one_dwarf_reg_size to communicate on what has been done by the
++ latter. */
++
++typedef struct
++{
++ /* Whether the dwarf return column was initialized. */
++ bool wrote_return_column;
++
++ /* For each hard register REGNO, whether init_one_dwarf_reg_size
++ was given REGNO to process already. */
++ bool processed_regno [FIRST_PSEUDO_REGISTER];
++
++} init_one_dwarf_reg_state;
++
++/* Helper for expand_builtin_init_dwarf_reg_sizes. Generate code to
++ initialize the dwarf register size table entry corresponding to register
++ REGNO in REGMODE. TABLE is the table base address, SLOTMODE is the mode to
++ use for the size entry to initialize, and INIT_STATE is the communication
++ datastructure conveying what we're doing to our caller. */
++
++static
++void init_one_dwarf_reg_size (int regno, machine_mode regmode,
++ rtx table, machine_mode slotmode,
++ init_one_dwarf_reg_state *init_state)
++{
++ const unsigned int dnum = DWARF_FRAME_REGNUM (regno);
++ const unsigned int rnum = DWARF2_FRAME_REG_OUT (dnum, 1);
++
++ const HOST_WIDE_INT slotoffset = rnum * GET_MODE_SIZE (slotmode);
++ const HOST_WIDE_INT regsize = GET_MODE_SIZE (regmode);
++
++ init_state->processed_regno[regno] = true;
++
++ if (rnum >= DWARF_FRAME_REGISTERS)
++ return;
++
++ if (dnum == DWARF_FRAME_RETURN_COLUMN)
++ {
++ if (regmode == VOIDmode)
++ return;
++ init_state->wrote_return_column = true;
++ }
++
++ if (slotoffset < 0)
++ return;
++
++ emit_move_insn (adjust_address (table, slotmode, slotoffset),
++ gen_int_mode (regsize, slotmode));
++}
++
++/* Generate code to initialize the dwarf register size table located
++ at the provided ADDRESS. */
+
+ void
+ expand_builtin_init_dwarf_reg_sizes (tree address)
+@@ -261,35 +313,40 @@ expand_builtin_init_dwarf_reg_sizes (tre
+ enum machine_mode mode = TYPE_MODE (char_type_node);
+ rtx addr = expand_normal (address);
+ rtx mem = gen_rtx_MEM (BLKmode, addr);
+- bool wrote_return_column = false;
++
++ init_one_dwarf_reg_state init_state;
++
++ memset ((char *)&init_state, 0, sizeof (init_state));
+
+ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ {
+- unsigned int dnum = DWARF_FRAME_REGNUM (i);
+- unsigned int rnum = DWARF2_FRAME_REG_OUT (dnum, 1);
+-
+- if (rnum < DWARF_FRAME_REGISTERS)
+- {
+- HOST_WIDE_INT offset = rnum * GET_MODE_SIZE (mode);
+- HOST_WIDE_INT size;
+- enum machine_mode save_mode = targetm.dwarf_frame_reg_mode (i);
++ machine_mode save_mode;
++ rtx span;
+
+- if (dnum == DWARF_FRAME_RETURN_COLUMN)
++ /* No point in processing a register multiple times. This could happen
++ with register spans, e.g. when a reg is first processed as a piece of
++ a span, then as a register on its own later on. */
++
++ if (init_state.processed_regno[i])
++ continue;
++
++ save_mode = targetm.dwarf_frame_reg_mode (i);
++ span = targetm.dwarf_register_span (gen_rtx_REG (save_mode, i));
++ if (!span)
++ init_one_dwarf_reg_size (i, save_mode, mem, mode, &init_state);
++ else
++ {
++ for (int si = 0; si < XVECLEN (span, 0); si++)
+ {
+- if (save_mode == VOIDmode)
+- continue;
+- wrote_return_column = true;
+- }
+- size = GET_MODE_SIZE (save_mode);
+- if (offset < 0)
+- continue;
++ rtx reg = XVECEXP (span, 0, si);
++ init_one_dwarf_reg_size
++ (REGNO (reg), GET_MODE (reg), mem, mode, &init_state);
++ }
+
+- emit_move_insn (adjust_address (mem, mode, offset),
+- gen_int_mode (size, mode));
+ }
+ }
+
+- if (!wrote_return_column)
++ if (!init_state.wrote_return_column)
+ init_return_column_size (mode, mem, DWARF_FRAME_RETURN_COLUMN);
+
+ #ifdef DWARF_ALT_FRAME_RETURN_COLUMN