Fix instances of gen_rtx_REG (VOIDmode, ...)

Several definitions of INCOMING_RETURN_ADDR_RTX used
gen_rtx_REG (VOIDmode, ...), which with later patches
would trip an assert.  This patch converts them to use
Pmode instead.

gcc/
2016-11-15  Richard Sandiford  <richard.sandiford@arm.com>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

	* config/i386/i386.h (INCOMING_RETURN_ADDR_RTX): Use Pmode instead
	of VOIDmode.
	* config/ia64/ia64.h (INCOMING_RETURN_ADDR_RTX): Likewise.
	* config/iq2000/iq2000.h (INCOMING_RETURN_ADDR_RTX): Likewise.
	* config/m68k/m68k.h (INCOMING_RETURN_ADDR_RTX): Likewise.
	* config/microblaze/microblaze.h (INCOMING_RETURN_ADDR_RTX): Likewise.
	* config/mips/mips.h (INCOMING_RETURN_ADDR_RTX): Likewise.
	* config/mn10300/mn10300.h (INCOMING_RETURN_ADDR_RTX): Likewise.
	* config/nios2/nios2.h (INCOMING_RETURN_ADDR_RTX): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r242447

gcc/ChangeLog

@@ -2,6 +2,20 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* config/i386/i386.h (INCOMING_RETURN_ADDR_RTX): Use Pmode instead
+	of VOIDmode.
+	* config/ia64/ia64.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+	* config/iq2000/iq2000.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+	* config/m68k/m68k.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+	* config/microblaze/microblaze.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+	* config/mips/mips.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+	* config/mn10300/mn10300.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+	* config/nios2/nios2.h (INCOMING_RETURN_ADDR_RTX): Likewise.
+
+2016-11-15  Richard Sandiford  <richard.sandiford@arm.com>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* dce.c (check_argument_store): Pass the size instead of
 	the memory reference.
 	(find_call_stack_args): Pass MEM_SIZE to check_argument_store.

gcc/config/i386/i386.h

@@ -2176,7 +2176,7 @@ extern int const x86_64_ms_sysv_extra_clobbered_registers[12];
 
 /* Before the prologue, RA is at 0(%esp).  */
 #define INCOMING_RETURN_ADDR_RTX \
-  gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM))
+  gen_rtx_MEM (Pmode, gen_rtx_REG (Pmode, STACK_POINTER_REGNUM))
 
 /* After the prologue, RA is at -4(AP) in the current frame.  */
 #define RETURN_ADDR_RTX(COUNT, FRAME)					\

gcc/config/ia64/ia64.h

@@ -896,7 +896,7 @@ enum reg_class
    RTL is either a `REG', indicating that the return value is saved in `REG',
    or a `MEM' representing a location in the stack.  This enables DWARF2
    unwind info for C++ EH.  */
-#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, BR_REG (0))
+#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, BR_REG (0))
 
 /* A C expression whose value is an integer giving the offset, in bytes, from
    the value of the stack pointer register to the top of the stack frame at the

gcc/config/iq2000/iq2000.h

@@ -258,7 +258,7 @@ enum reg_class
     : (rtx) 0)
 
 /* Before the prologue, RA lives in r31.  */
-#define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (VOIDmode, GP_REG_FIRST + 31)
+#define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (Pmode, GP_REG_FIRST + 31)
 
 
 /* Register That Address the Stack Frame.  */

gcc/config/m68k/m68k.h

@@ -768,7 +768,7 @@ do { if (cc_prev_status.flags & CC_IN_68881)			\
 
 /* Before the prologue, RA is at 0(%sp).  */
 #define INCOMING_RETURN_ADDR_RTX \
-  gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM))
+  gen_rtx_MEM (Pmode, gen_rtx_REG (Pmode, STACK_POINTER_REGNUM))
 
 /* After the prologue, RA is at 4(AP) in the current frame.  */
 #define RETURN_ADDR_RTX(COUNT, FRAME)					   \

gcc/config/microblaze/microblaze.h

@@ -182,7 +182,7 @@ extern enum pipeline_type microblaze_pipe;
    NOTE:  GDB has a workaround and expects this incorrect value.
    If this is fixed, a corresponding fix to GDB is needed.  */
 #define INCOMING_RETURN_ADDR_RTX  			\
-  gen_rtx_REG (VOIDmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM)
+  gen_rtx_REG (Pmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM)
 
 /* Use DWARF 2 debugging information by default.  */
 #define DWARF2_DEBUGGING_INFO

gcc/config/mips/mips.h

@@ -1469,7 +1469,7 @@ FP_ASM_SPEC "\
 #define DWARF_FRAME_RETURN_COLUMN RETURN_ADDR_REGNUM
 
 /* Before the prologue, RA lives in r31.  */
-#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, RETURN_ADDR_REGNUM)
+#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM)
 
 /* Describe how we implement __builtin_eh_return.  */
 #define EH_RETURN_DATA_REGNO(N) \

gcc/config/mn10300/mn10300.h

@@ -516,7 +516,7 @@ struct cum_arg
 /* 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))
+  gen_rtx_MEM (Pmode, gen_rtx_REG (Pmode, STACK_POINTER_REGNUM))
 
 /* Maximum number of registers that can appear in a valid memory address.  */
 

gcc/config/nios2/nios2.h

@@ -265,7 +265,7 @@ enum reg_class
 #define FIRST_PARM_OFFSET(FUNDECL) 0
 
 /* Before the prologue, RA lives in r31.  */
-#define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (VOIDmode, RA_REGNO)
+#define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (Pmode, RA_REGNO)
 #define RETURN_ADDR_RTX(C,F) nios2_get_return_address (C)
 
 #define DWARF_FRAME_RETURN_COLUMN RA_REGNO