flow.c (propagate_one_insn): Add error message and print out insn for debugging.

2002-01-15  Eric Christopher  <echristo@redhat.com>

	* flow.c (propagate_one_insn): Add error message and print out
	insn for debugging.

From-SVN: r48878

gcc/ChangeLog

+2002-01-15  Eric Christopher  <echristo@redhat.com>
+
+	* flow.c (propagate_one_insn): Add error message and print out
+	insn for debugging.
+
 2002-01-15  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* system.h (ASM_IDENTIFY_GCC, STDC_VALUE, TRAMPOLINE_ALIGN,

gcc/flow.c

@@ -1566,7 +1566,11 @@ propagate_one_insn (pbi, insn)
 	      || (HAVE_sibcall_epilogue
 		  && sibcall_epilogue_contains (insn)))
 	  && find_reg_note (insn, REG_MAYBE_DEAD, NULL_RTX) == 0)
+	{
+	  internal_error ("Attempt to delete prologue/epilogue insn:\n");
+          debug_rtx (insn);
 	  abort ();
+	}
 
       /* Record sets.  Do this even for dead instructions, since they
 	 would have killed the values if they hadn't been deleted.  */