dwarf2cfi: Handle return column save from CIE.

When we record a save of the return column in the CIE, remember
that while processing the FDE.  This requires propagating the
handling of PC_RTX as a representative of the return column to
more locations.

MIPS had been handling this case by hand, and is no longer required.

        * dwarf2cfi.c (cie_return_save): New.
        (queue_reg_save): Use compare_reg_or_pc.
        (dwarf2out_flush_queued_reg_saves): Handle pc_rtx as return column.
        (dwarf2out_frame_debug_expr): Likewise.
        (dwarf2out_frame_debug_cfa_register): Record saved reg for pc too.
        (initial_return_save): Likewise.
        (execute_dwarf2_frame): Save and restore initial return save from
        the cie to the fde.
        * config/mips/mips.c (mips_frame_set): Remove special case for
        DWARF_FRAME_RETURN_COLUMN.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@176099 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 0 insertions, 7 deletions

diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index f4010da3657..ee71c4040c7 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -8203,13 +8203,6 @@ mips_frame_set (rtx mem, rtx reg)
 {
   rtx set;
 
-  /* If we're saving the return address register and the DWARF return
-     address column differs from the hard register number, adjust the
-     note reg to refer to the former.  */
-  if (REGNO (reg) == RETURN_ADDR_REGNUM
-      && DWARF_FRAME_RETURN_COLUMN != RETURN_ADDR_REGNUM)
-    reg = gen_rtx_REG (GET_MODE (reg), DWARF_FRAME_RETURN_COLUMN);
-
   set = gen_rtx_SET (VOIDmode, mem, reg);
   RTX_FRAME_RELATED_P (set) = 1;