mn10300: Better definition of INCOMING_RETURN_ADDR_RTX.

The new definition is more useful to the unwinder. From-SVN: r168668

mn10300: Better definition of INCOMING_RETURN_ADDR_RTX.
The new definition is more useful to the unwinder. From-SVN: r168668
885fe07c · Richard Henderson · Richard Henderson · 7bc62637 · 885fe07c · 885fe07c
Commit 885fe07c authored Jan 11, 2011 by Richard Henderson Committed by Richard Henderson Jan 11, 2011
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gcc/config/mn10300/mn10300.h
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2011-01-11  Richard Henderson  <rth@redhat.com>
+
+	* config/mn10300/mn10300.h (INCOMING_RETURN_ADDR_RTX): Define
+	in terms of the value on the stack, not the MDR register.
+
 2011-01-11  Jan Hubicka  <jh@suse.cz>

 	PR lto/45721

--- a/gcc/config/mn10300/mn10300.h
+++ b/gcc/config/mn10300/mn10300.h
@@ -548,7 +548,10 @@ struct cum_arg
   ? gen_rtx_MEM (Pmode, arg_pointer_rtx) \
   : (rtx) 0)

-#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, MDR_REGNUM)
+/* The return address is saved both in the stack and in MDR.  Using
+   the stack location is handiest for what unwinding needs.  */
+#define INCOMING_RETURN_ADDR_RTX \
+  gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM))

 /* Maximum number of registers that can appear in a valid memory address.  */