re PR debug/91231 (ICE in dwarf2out_inline_entry, at dwarf2out.c:27642)

2019-07-23  Richard Biener  <rguenther@suse.de>

	PR debug/91231
	* lto-streamer-in.c (input_function): Drop inline-entry markers
	that ended up with an unknown location block.

From-SVN: r273733

gcc/ChangeLog

 2019-07-23  Richard Biener  <rguenther@suse.de>
 
+	PR debug/91231
+	* lto-streamer-in.c (input_function): Drop inline-entry markers
+	that ended up with an unknown location block.
+
+2019-07-23  Richard Biener  <rguenther@suse.de>
+
 	PR tree-optimization/83518
 	* tree-ssa-sccvn.c (vn_reference_lookup_3): Handle aggregate
 	init from a constant even when partial defs are already recorded.

gcc/lto-streamer-in.c

@@ -1141,6 +1141,14 @@ input_function (tree fn_decl, class data_in *data_in,
 		      ? !MAY_HAVE_DEBUG_MARKER_STMTS
 		      : !MAY_HAVE_DEBUG_BIND_STMTS))
 		remove = true;
+	      /* In case the linemap overflows locations can be dropped
+		 to zero.  Thus do not keep nonsensical inline entry markers
+		 we'd later ICE on.  */
+	      tree block;
+	      if (gimple_debug_inline_entry_p (stmt)
+		  && (block = gimple_block (stmt))
+		  && !inlined_function_outer_scope_p (block))
+		remove = true;
 	      if (is_gimple_call (stmt)
 		  && gimple_call_internal_p (stmt))
 		{