* target.h (struct gcc_target): Add frame_pointer_required field.

	* target-def.h (TARGET_FRAME_POINTER_REQUIRED): New.
	(TARGET_INITIALIZER): Use TARGET_FRAME_POINTER_REQUIRED.
	* ira.c (setup_eliminable_regset): Use frame_pointer_required target
	hook.
	* reload1.c (update_eliminables): (Ditto.).
	* gcc/system.h (FRAME_POINTER_REQUIRED): Poison.
	* doc/tm.texi (FRAME_POINTER_REQUIRED): Revise documentation.
	(INITIAL_FRAME_POINTER_OFFSET): (Ditto.).

	* config/arc/arc.h (FRAME_POINTER_REQUIRED): Remove macro.

	* config/arm/arm.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/arm/arm.c (TARGET_FRAME_POINTER_REQUIRED): Define.
	(arm_frame_pointer_required): New function.

	* config/avr/avr.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/avr/avr.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(avr_frame_pointer_required_p): Declare as static.
	* config/avr/avr-protos.h (avr_frame_pointer_required_p): Remove.

	* config/bfin/bfin.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/bfin/bfin.c (TARGET_FRAME_POINTER_REQUIRED): Define.
	(bfin_frame_pointer_required): Make as static, change return type
	to bool.
	* config/bfin/bfin-protos.h (bfin_frame_pointer_required): Remove.

	* config/cris/cris.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/cris/cris.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(cris_frame_pointer_required): New function.
	
	* config/crx/crx.h (FRAME_POINTER_REQUIRED): Remove macro.

	* config/fr30/fr30.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/fr30/fr30.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(fr30_frame_pointer_required): New function.
	
	* config/frv/frv.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/frv/frv.c (TARGET_FRAME_POINTER_REQUIRED): Define.
	(frv_frame_pointer_required): Make as static, change return type
	to bool.
	* config/bfin/bfin-protos.h (frv_frame_pointer_required): Remove.

	* config/i386/i386.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/i386/i386.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(ix86_frame_pointer_required): Make as static, change return type to
	bool.
	* config/i386/i386-protos.h (ix86_frame_pointer_required): Remove.

	* config/m32c/m32c.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/m32c/m32c.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.

	* config/m32r/m32r.h (FRAME_POINTER_REQUIRED): Remove macro.

	* config/mcore/mcore.h (CAN_ELIMINATE): Remove macro.
	
	* config/mep/mep.h (FRAME_POINTER_REQUIRED): Remove macro.

	* config/mips/mips.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/mips/mips.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(mips_frame_pointer_required): Make as static.
	* config/mips/mips-protos.h (mips_frame_pointer_required): Remove.
	
	* config/mmix/mmix.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/mmix/mmix.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(mmix_frame_pointer_required): Mew function.

	* config/moxie/moxie.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/moxie/moxie.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.

	* config/pa/pa.h (FRAME_POINTER_REQUIRED): Remove macro.

	* config/score/score.h (FRAME_POINTER_REQUIRED): Remove macro.

	* config/sh/sh.h (CAN_ELIMINATE): Remove macro.

	* config/sparc/sparc.h (FRAME_POINTER_REQUIRED): Remove macro.
	(CAN_ELIMINATE): Redefine.
	* config/sparc/sparc.c (TARGET_FRAME_POINTER_REQUIRED): Define macro.
	(sparc_frame_pointer_required): New function.
	(sparc_can_eliminate): New function.
	* config/sparc/sparc-protos.h (sparc_can_eliminate): Declare.

	* config/vax/vax.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/vax/vax.c (TARGET_FRAME_POINTER_REQUIRED): Define.

	* config/xtensa/xtensa.h (FRAME_POINTER_REQUIRED): Remove macro.
	* config/xtensa/xtensa.c (TARGET_FRAME_POINTER_REQUIRED): Define.
	(xtensa_frame_pointer_required): Make as static, change return type
	to bool.
	* config/xtensa/xtensa-protos.h (xtensa_frame_pointer_required):
	Remove.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@149065 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 17 insertions, 1 deletions

diff --git a/gcc/config/cris/cris.c b/gcc/config/cris/cris.c
index bc634ddbf3e..66fc05d0f6e 100644
--- a/gcc/config/cris/cris.c
+++ b/gcc/config/cris/cris.c
@@ -1,6 +1,6 @@
 /* Definitions for GCC.  Part of the machine description for CRIS.
    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-   2008  Free Software Foundation, Inc.
+   2008, 2009  Free Software Foundation, Inc.
    Contributed by Axis Communications.  Written by Hans-Peter Nilsson.
 
 This file is part of GCC.
@@ -122,6 +122,8 @@ static tree cris_md_asm_clobbers (tree, tree, tree);
 
 static bool cris_handle_option (size_t, const char *, int);
 
+static bool cris_frame_pointer_required (void);
+
 /* This is the parsed result of the "-max-stack-stackframe=" option.  If
    it (still) is zero, then there was no such option given.  */
 int cris_max_stackframe = 0;
@@ -180,6 +182,8 @@ int cris_cpu_version = CRIS_DEFAULT_CPU_VERSION;
 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT | CRIS_SUBTARGET_DEFAULT)
 #undef TARGET_HANDLE_OPTION
 #define TARGET_HANDLE_OPTION cris_handle_option
+#undef TARGET_FRAME_POINTER_REQUIRED
+#define TARGET_FRAME_POINTER_REQUIRED cris_frame_pointer_required
 
 struct gcc_target targetm = TARGET_INITIALIZER;
 
@@ -3814,6 +3818,18 @@ cris_md_asm_clobbers (tree outputs, tree inputs, tree in_clobbers)
 		    clobbers);
 }
 
+/* Implement TARGET_FRAME_POINTER_REQUIRED.
+
+   Really only needed if the stack frame has variable length (alloca
+   or variable sized local arguments (GNU C extension).  See PR39499 and
+   PR38609 for the reason this isn't just 0.  */
+
+bool
+cris_frame_pointer_required (void)
+{
+  return !current_function_sp_is_unchanging;
+}
+
 #if 0
 /* Various small functions to replace macros.  Only called from a
    debugger.  They might collide with gcc functions or system functions,