[PATCH] Fix PR59543

[Richard Biener]

This fixes PR59543 (confirmed by Jakub for the testcase at least)
by not dropping debug stmts during WPA phase.

LTO profiled-bootstrapped on x86_64-unknown-linux-gnu, applied.

Honza - you can always come up with a better fix for 4.10.

Richard.

2014-03-19  Richard Biener  <rguenther@suse.de>

	PR lto/59543
	* lto-streamer-in.c (input_function): In WPA stage do not drop
	debug stmts.

Index: lto-streamer-in.c
===================================================================
--- lto-streamer-in.c	(revision 208642)
+++ lto-streamer-in.c	(working copy)
@@ -988,7 +988,7 @@ input_function (tree fn_decl, struct dat
 	     We can't remove them earlier because this would cause uid
 	     mismatches in fixups, but we can do it at this point, as
 	     long as debug stmts don't require fixups.  */
-	  if (!MAY_HAVE_DEBUG_STMTS && is_gimple_debug (stmt))
+	  if (!MAY_HAVE_DEBUG_STMTS && !flag_wpa && is_gimple_debug (stmt))
 	    {
 	      gimple_stmt_iterator gsi = bsi;
 	      gsi_next (&bsi);