gcse.c (insert_insn_end_bb): Correct placement of insns when the current block…

gcse.c (insert_insn_end_bb): Correct placement of insns when the current block starts with a CODE_LABEL and...

�
        * gcse.c (insert_insn_end_bb): Correct placement of insns when the
        current block starts with a CODE_LABEL and ends with a CALL and
        we can not find all the argument setup instructions for the CALL.

From-SVN: r27321

gcc/gcse.c

@@ -4189,9 +4189,26 @@ insert_insn_end_bb (expr, bb, pre)
 	    }
 	}
       
-      new_insn = emit_insn_before (pat, insn);
-      if (BLOCK_HEAD (bb) == insn)
-	BLOCK_HEAD (bb) = new_insn;
+      /* If we found all the parameter loads, then we want to insert
+	 before the first parameter load.
+
+	 If we did not find all the parameter loads, then we might have
+	 stopped on the head of the block, which could be a CODE_LABEL.
+	 If we inserted before the CODE_LABEL, then we would be putting
+	 the insn in the wrong basic block.  In that case, put the insn
+	 after the CODE_LABEL.
+
+	 ?!? Do we need to account for NOTE_INSN_BASIC_BLOCK here?  */
+      if (GET_CODE (insn) != CODE_LABEL)
+	{
+	  new_insn = emit_insn_before (pat, insn);
+	  if (BLOCK_HEAD (bb) == insn)
+	    BLOCK_HEAD (bb) = new_insn;
+	}
+      else
+	{
+	  new_insn = emit_insn_after (pat, insn);
+	}
     }
   else
     {