Fix for g++ failure reported by Brendan.

	* flow.c (find_basic_blocks): Delete check for in_libcall_block when
	prev_code is a CALL_INSN.  Change check for REG_RETVAL note to
	use in_libcall_block.
	(find_basic_blocks_1): Delete check for in_libcall_block when prev_code
	is a CALL_INSN.  If CALL_INSN and in_libcall_block, then change code
	to INSN.

From-SVN: r22529

gcc/ChangeLog

+Mon Sep 21 13:51:05 1998  Jim Wilson  <wilson@cygnus.com>
+
+	* flow.c (find_basic_blocks): Delete check for in_libcall_block when
+	prev_code is a CALL_INSN.  Change check for REG_RETVAL note to
+	use in_libcall_block.
+	(find_basic_blocks_1): Delete check for in_libcall_block when prev_code
+	is a CALL_INSN.  If CALL_INSN and in_libcall_block, then change code
+	to INSN.
+
 Mon Sep 21 14:02:23 1998
 
 	* i386.h: (TARGET_SWITCHES) Improve doc for align-double.  Fix

gcc/flow.c

@@ -331,12 +331,13 @@ find_basic_blocks (f, nregs, file, live_reachable_p)
 	    || (GET_RTX_CLASS (code) == 'i'
 		&& (prev_code == JUMP_INSN
 		    || (prev_code == CALL_INSN
-			&& (nonlocal_label_list != 0 || eh_region)
-			&& ! in_libcall_block)
+			&& (nonlocal_label_list != 0 || eh_region))
 		    || prev_code == BARRIER)))
 	  i++;
 
-	if (code == CALL_INSN && find_reg_note (insn, REG_RETVAL, NULL_RTX))
+	/* We change the code of the CALL_INSN, so that it won't start a
+	   new block.  */
+	if (code == CALL_INSN && in_libcall_block)
 	  code = INSN;
 
 	if (code != NOTE)
@@ -456,8 +457,7 @@ find_basic_blocks_1 (f, nonlocal_label_list, live_reachable_p)
 	       || (GET_RTX_CLASS (code) == 'i'
 		   && (prev_code == JUMP_INSN
 		       || (prev_code == CALL_INSN
-			   && (nonlocal_label_list != 0 || eh_note)
-			   && ! in_libcall_block)
+			   && (nonlocal_label_list != 0 || eh_note))
 		       || prev_code == BARRIER)))
 	{
 	  basic_block_head[++i] = insn;
@@ -519,6 +519,11 @@ find_basic_blocks_1 (f, nonlocal_label_list, live_reachable_p)
                                         NOTE_BLOCK_NUMBER (XEXP (eh_note, 0));
       BLOCK_NUM (insn) = i;
 
+      /* We change the code of the CALL_INSN, so that it won't start a
+	 new block.  */
+      if (code == CALL_INSN && in_libcall_block)
+	code = INSN;
+
       if (code != NOTE)
 	prev_code = code;