reload1.c (emit_reload_insns): Accept a new arg for the bb.

        * reload1.c (emit_reload_insns): Accept a new arg for the bb.  Use
        it to update bb boundaries.  Update caller.
        * function.c (reposition_prologue_and_epilogue_notes): Update
        bb boundaries wrt the moved note.

From-SVN: r22507

3 files changed, 43 insertions, 12 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2e90a70..01893e9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+Sun Sep 20 23:28:11 1998  Richard Henderson  <rth@cygnus.com>
+
+	* reload1.c (emit_reload_insns): Accept a new arg for the bb.  Use
+	it to update bb boundaries.  Update caller.
+	* function.c (reposition_prologue_and_epilogue_notes): Update
+	bb boundaries wrt the moved note.
+
 Sun Sep 20 20:57:02 1998  Robert Lipe  <robertl@dgii.com>
 	
 	* configure.in (i*86-*-sysv5*): Use fixinc.svr4 to patch byteorder
diff --git a/gcc/function.c b/gcc/function.c
index c75648d..99163e6 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -6239,12 +6239,19 @@ reposition_prologue_and_epilogue_notes (f)
 			    && NOTE_LINE_NUMBER (note) == NOTE_INSN_PROLOGUE_END)
 			  break;
 		    }
+
 		  next = NEXT_INSN (note);
 		  prev = PREV_INSN (note);
 		  if (prev)
 		    NEXT_INSN (prev) = next;
 		  if (next)
 		    PREV_INSN (next) = prev;
+
+		  /* Whether or not we can depend on basic_block_head, 
+		     attempt to keep it up-to-date.  */
+		  if (basic_block_head[0] == note)
+		    basic_block_head[0] = next;
+
 		  add_insn_after (note, insn);
 		}
 	    }
@@ -6283,7 +6290,14 @@ reposition_prologue_and_epilogue_notes (f)
 		    NEXT_INSN (prev) = next;
 		  if (next)
 		    PREV_INSN (next) = prev;
-		  add_insn_after (note, PREV_INSN (insn));
+
+		  /* Whether or not we can depend on basic_block_head, 
+		     attempt to keep it up-to-date.  */
+		  if (n_basic_blocks
+		      && basic_block_head[n_basic_blocks-1] == insn)
+		    basic_block_head[n_basic_blocks-1] = note;
+
+		  add_insn_before (note, insn);
 		}
 	    }
 	}
diff --git a/gcc/reload1.c b/gcc/reload1.c
index 98cbae0c..d8eb326 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -387,7 +387,7 @@ static int reload_reg_reaches_end_p	PROTO((int, int, enum reload_type));
 static int allocate_reload_reg		PROTO((int, rtx, int, int));
 static void choose_reload_regs		PROTO((rtx, rtx));
 static void merge_assigned_reloads	PROTO((rtx));
-static void emit_reload_insns		PROTO((rtx));
+static void emit_reload_insns		PROTO((rtx, int));
 static void delete_output_reload	PROTO((rtx, int, rtx));
 static void inc_for_reload		PROTO((rtx, rtx, int));
 static int constraint_accepts_reg_p	PROTO((char *, rtx));
@@ -4219,7 +4219,7 @@ reload_as_needed (first, live_known)
 
 	      /* Generate the insns to reload operands into or out of
 		 their reload regs.  */
-	      emit_reload_insns (insn);
+	      emit_reload_insns (insn, this_block);
 
 	      /* Substitute the chosen reload regs from reload_reg_rtx
 		 into the insn's body (or perhaps into the bodies of other
@@ -6329,8 +6329,9 @@ merge_assigned_reloads (insn)
 /* Output insns to reload values in and out of the chosen reload regs.  */
 
 static void
-emit_reload_insns (insn)
+emit_reload_insns (insn, bb)
      rtx insn;
+     int bb;
 {
   register int j;
   rtx input_reload_insns[MAX_RECOG_OPERANDS];
@@ -6345,7 +6346,7 @@ emit_reload_insns (insn)
   rtx other_operand_reload_insns = 0;
   rtx other_output_reload_insns[MAX_RECOG_OPERANDS];
   rtx following_insn = NEXT_INSN (insn);
-  rtx before_insn = insn;
+  rtx before_insn = PREV_INSN (insn);
   int special;
   /* Values to be put in spill_reg_store are put here first.  */
   rtx new_spill_reg_store[FIRST_PSEUDO_REGISTER];
@@ -7251,18 +7252,18 @@ emit_reload_insns (insn)
      reloads for the operand.  The RELOAD_OTHER output reloads are
      output in descending order by reload number.  */
 
-  emit_insns_before (other_input_address_reload_insns, before_insn);
-  emit_insns_before (other_input_reload_insns, before_insn);
+  emit_insns_before (other_input_address_reload_insns, insn);
+  emit_insns_before (other_input_reload_insns, insn);
 
   for (j = 0; j < reload_n_operands; j++)
     {
-      emit_insns_before (inpaddr_address_reload_insns[j], before_insn);
-      emit_insns_before (input_address_reload_insns[j], before_insn);
-      emit_insns_before (input_reload_insns[j], before_insn);
+      emit_insns_before (inpaddr_address_reload_insns[j], insn);
+      emit_insns_before (input_address_reload_insns[j], insn);
+      emit_insns_before (input_reload_insns[j], insn);
     }
 
-  emit_insns_before (other_operand_reload_insns, before_insn);
-  emit_insns_before (operand_reload_insns, before_insn);
+  emit_insns_before (other_operand_reload_insns, insn);
+  emit_insns_before (operand_reload_insns, insn);
 
   for (j = 0; j < reload_n_operands; j++)
     {
@@ -7272,6 +7273,15 @@ emit_reload_insns (insn)
       emit_insns_before (other_output_reload_insns[j], following_insn);
     }
 
+  /* Keep basic block info up to date.  */
+  if (n_basic_blocks)
+    {
+      if (basic_block_head[bb] == insn)
+        basic_block_head[bb] = NEXT_INSN (before_insn);
+      if (basic_block_end[bb] == insn)
+        basic_block_end[bb] = PREV_INSN (following_insn);
+    }
+
   /* Move death notes from INSN
      to output-operand-address and output reload insns.  */
 #ifdef PRESERVE_DEATH_INFO_REGNO_P