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Fix PR77863

Message ID alpine.LSU.2.11.1610051356330.26629@t29.fhfr.qr
State New
Headers show

Commit Message

Richard Biener Oct. 5, 2016, 11:56 a.m. UTC 
Applied as obvious.

Richard.

2016-10-05  Richard Biener  <rguenther@suse.de>

	PR middle-end/77863
	* genmatch.c (capture_info::walk_c_expr): Diagnose unknown
	capture ids in c-exprs.
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Patch

Index: gcc/genmatch.c
===================================================================
--- gcc/genmatch.c	(revision 240776)
+++ gcc/genmatch.c	(working copy)
@@ -2194,8 +2194,10 @@  capture_info::walk_c_expr (c_expr *e)
 	    id = (const char *)n->val.str.text;
 	  else
 	    id = (const char *)CPP_HASHNODE (n->val.node.node)->ident.str;
-	  unsigned where = *e->capture_ids->get(id);
-	  info[info[where].same_as].force_no_side_effects_p = true;
+	  unsigned *where = e->capture_ids->get(id);
+	  if (! where)
+	    fatal_at (n, "unknown capture id '%s'", id);
+	  info[info[*where].same_as].force_no_side_effects_p = true;
 	  if (verbose >= 1
 	      && !gimple)
 	    warning_at (t, "capture escapes");