mn10300.c (can_use_return_insn): Add size of fixed stack space for function calls into the size of the frame.

        * mn10300.c (can_use_return_insn): Add size of fixed stack space
        for function calls into the size of the frame.  */
        (expand_prologue, expand_epilogue): Likewise.
        (initial_offset): Corresponding changes..
        * mn10300.h (OUTGOING_REG_PARM_STACK_SPACE): No longer define.
        (STACK_POINTER_OFFSET): Define.
        * mn10300.md (call, call_value expanders): Don't adjust the stack
        pointer here anymore.

        * mn10300.md (ashlsi3): Remove some alternatives which are no longer
        needed or desired.

From-SVN: r13837

3 files changed, 42 insertions, 17 deletions

diff --git a/gcc/config/mn10300/mn10300.c b/gcc/config/mn10300/mn10300.c
index 5093351..1ae2a27 100644
--- a/gcc/config/mn10300/mn10300.c
+++ b/gcc/config/mn10300/mn10300.c
@@ -327,7 +327,8 @@ print_operand_address (file, addr)
 int
 can_use_return_insn ()
 {
-  int size = get_frame_size ();
+  /* SIZE includes the fixed stack space needed for function calls.  */
+  int size = get_frame_size () + (!leaf_function_p () ? 12 : 0);
 
   return (reload_completed
 	  && size == 0
@@ -341,7 +342,17 @@ can_use_return_insn ()
 void
 expand_prologue ()
 {
-  unsigned int size = get_frame_size ();
+  unsigned int size;
+
+  /* We have to end the current sequence so leaf_function_p will
+     work.  We then start a new sequence to hold the prologue/epilogue.  */
+  end_sequence ();
+
+  /* SIZE includes the fixed stack space needed for function calls.  */
+  size = get_frame_size () + (!leaf_function_p () ? 12 : 0);
+
+  /* Start a new sequence for the prologue/epilogue.  */
+  start_sequence ();
 
   /* If this is an old-style varargs function, then its arguments
      need to be flushed back to the stack.  */
@@ -378,7 +389,17 @@ expand_prologue ()
 void
 expand_epilogue ()
 {
-  unsigned int size = get_frame_size ();
+  unsigned int size;
+
+  /* We have to end the current sequence so leaf_function_p will
+     work.  We then start a new sequence to hold the prologue/epilogue.  */
+  end_sequence ();
+
+  /* SIZE includes the fixed stack space needed for function calls.  */
+  size = get_frame_size () + (!leaf_function_p () ? 12 : 0);
+
+  /* Start a new sequence for the prologue/epilogue.  */
+  start_sequence ();
 
   /* Cut back the stack.  */
   if (frame_pointer_needed)
@@ -528,6 +549,8 @@ int
 initial_offset (from, to)
      int from, to;
 {
+  /* The difference between the argument pointer and the frame pointer
+     is the size of the callee register save area.  */
   if (from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM)
     {
       if (regs_ever_live[2] || regs_ever_live[3]
@@ -538,18 +561,24 @@ initial_offset (from, to)
 	return 0;
     }
 
+  /* The difference between the argument pointer and the stack pointer is
+     the sum of the size of this function's frame, the callee register save
+     area, and the fixed stack space needed for function calls (if any).  */
   if (from == ARG_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
     {
       if (regs_ever_live[2] || regs_ever_live[3]
 	  || regs_ever_live[6] || regs_ever_live[7]
 	  || frame_pointer_needed)
-	return get_frame_size () + 16;
+	return (get_frame_size () + 16 + (!leaf_function_p () ? 12 : 0));
       else
-	return get_frame_size ();
+	return (get_frame_size () + (!leaf_function_p () ? 12 : 0));
     }
 
+  /* The difference between the frame pointer and stack pointer is the sum
+     of the size of this function's frame and the fixed stack space needed
+     for function calls (if any).  */
   if (from == FRAME_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
-    return get_frame_size ();
+    return get_frame_size () + (!leaf_function_p () ? 12 : 0);
 
   abort ();
 }
diff --git a/gcc/config/mn10300/mn10300.h b/gcc/config/mn10300/mn10300.h
index f70b6bf..d850641 100644
--- a/gcc/config/mn10300/mn10300.h
+++ b/gcc/config/mn10300/mn10300.h
@@ -423,7 +423,10 @@ enum reg_class {
 /* We use d0/d1 for passing parameters, so allocate 8 bytes of space
    for a register flushback area.  */
 #define REG_PARM_STACK_SPACE(DECL) 8
-#define OUTGOING_REG_PARM_STACK_SPACE
+
+/* So we can allocate space for return pointers once for the function
+   instead of around every call.  */
+#define STACK_POINTER_OFFSET 4
 
 /* 1 if N is a possible register number for function argument passing.
    On the MN10300, no registers are used in this way.  */
diff --git a/gcc/config/mn10300/mn10300.md b/gcc/config/mn10300/mn10300.md
index 5db2a94..98f4536 100644
--- a/gcc/config/mn10300/mn10300.md
+++ b/gcc/config/mn10300/mn10300.md
@@ -962,9 +962,7 @@
 {
   if (! call_address_operand (XEXP (operands[0], 0)))
     XEXP (operands[0], 0) = force_reg (SImode, XEXP (operands[0], 0));
-  emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (-4)));
   emit_call_insn (gen_call_internal (XEXP (operands[0], 0), operands[1]));
-  emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (4)));
   DONE;
 }")
 
@@ -987,11 +985,9 @@
 {
   if (! call_address_operand (XEXP (operands[1], 0)))
     XEXP (operands[1], 0) = force_reg (SImode, XEXP (operands[1], 0));
-  emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (-4)));
   emit_call_insn (gen_call_value_internal (operands[0],
 					   XEXP (operands[1], 0),
 					   operands[2]));
-  emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (4)));
   DONE;
 }")
 
@@ -1062,19 +1058,16 @@
 ;; ----------------------------------------------------------------------
 
 (define_insn "ashlsi3"
-  [(set (match_operand:SI 0 "register_operand" "=da,d,a,d,a,d,a,d")
+  [(set (match_operand:SI 0 "register_operand" "=da,d,d,d,d")
 	(ashift:SI
-	 (match_operand:SI 1 "register_operand" "0,0,0,0,0,0,0,0")
-	 (match_operand:QI 2 "nonmemory_operand" "J,K,K,M,M,L,L,di")))]
+	 (match_operand:SI 1 "register_operand" "0,0,0,0,0")
+	 (match_operand:QI 2 "nonmemory_operand" "J,K,M,L,di")))]
   ""
   "@
   add %0,%0
   asl2 %0
-  add %0,%0\;add %0,%0
   asl2 %0\;add %0,%0
-  add %0,%0\;add %0,%0\;add %0,%0
   asl2 %0\;asl2 %0
-  add %0,%0\;add %0,%0\;add %0,%0\;add %0,%0
   asl %2,%0"
   [(set_attr "cc" "set_zn_c0")])