function.h (struct emit_status): Delete x_first_insn, x_last_insn and sequence_stack.

	* function.h (struct emit_status): Delete x_first_insn, x_last_insn
	and sequence_stack.  Add seq.
	(seq_stack): Delete.
	* function.c (prepare_function_start): Don't access x_last_insn.
	* emit-rtl.h (get_current_sequence, get_topmost_sequence): New.
	(get_insns, set_first_insn, get_last_insn, set_last_insn): Use them.
	* emit_rtl.c (start_sequence, push_topmost_sequence,
	pop_topmost_sequence, end_sequence, in_sequence_p, init_emit): Use
	sequence accessors.
	(get_last_insn_anywhere, add_insn_after_nobb, add_insn_before_nobb,
	remove_insn): Likewise.  Simplify.
	* config/m32c/m32c.c (m32c_leaf_function_p): Use push_topmost_sequence
	and pop_topmost_sequence.
	(m32c_function_needs_enter): Use get_topmost_sequence.  Ignore
	debug insns.
	* config/rs6000/rs6000.c (rs6000_call_aix): Use get_current_sequence.

From-SVN: r222112

1 files changed, 9 insertions, 12 deletions

diff --git a/gcc/function.h b/gcc/function.h
index b89c5ae..363d666 100644
--- a/gcc/function.h
+++ b/gcc/function.h
@@ -41,19 +41,17 @@ struct GTY(()) emit_status {
   /* Lowest label number in current function.  */
   int x_first_label_num;
 
-  /* The ends of the doubly-linked chain of rtl for the current function.
-     Both are reset to null at the start of rtl generation for the function.
+  /* seq.first and seq.last are the ends of the doubly-linked chain of
+     rtl for the current function.  Both are reset to null at the
+     start of rtl generation for the function. 
 
-     start_sequence saves both of these on `sequence_stack' and then starts
-     a new, nested sequence of insns.  */
-  rtx_insn *x_first_insn;
-  rtx_insn *x_last_insn;
+     start_sequence saves both of these on seq.next and then starts
+     a new, nested sequence of insns.
 
-  /* Stack of pending (incomplete) sequences saved by `start_sequence'.
-     Each element describes one pending sequence.
-     The main insn-chain is saved in the last element of the chain,
-     unless the chain is empty.  */
-  struct sequence_stack *sequence_stack;
+     seq.next is a stack of pending (incomplete) sequences saved by
+     start_sequence.  Each element describes one pending sequence.
+     The main insn-chain is the last element of the chain.  */
+  struct sequence_stack seq;
 
   /* INSN_UID for next insn emitted.
      Reset to 1 for each function compiled.  */
@@ -88,7 +86,6 @@ extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
 
 /* For backward compatibility... eventually these should all go away.  */
 #define reg_rtx_no (crtl->emit.x_reg_rtx_no)
-#define seq_stack (crtl->emit.sequence_stack)
 
 #define REGNO_POINTER_ALIGN(REGNO) (crtl->emit.regno_pointer_align[REGNO])