re PR tree-optimization/84427 (gcc ICE at -O3 on x86_64-linux-gnu in…

re PR tree-optimization/84427 (gcc ICE at -O3 on x86_64-linux-gnu in compute_antic, at tree-ssa-pre.c:2356)

2018-03-02  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84427
	* tree-ssa-pre.c (bitmap_remove_expr_from_set): Remove.
	(bitmap_set_subtract_values): Rewrite to handle multiple
	exprs per value.
	(clean): Likewise.
	(prune_clobbered_mems): Likewise.
	(phi_translate): Take edge instead of pred/phiblock.
	(phi_translate_1): Likewise.
	(phi_translate_set): Likewise.  Insert all translated
	exprs for a value into the set, keeping possibly multiple
	expressions per value.
	(compute_antic_aux): Adjust for phi_translate changes.
	When intersecting union the expressions and prune those
	not in the final value set, keeping possibly multiple
	expressions per value.  Do not use value-insertion
	for unioning ANTIC_OUT U EXP_GEN - TMP_GEN but merge
	all expressions.  Add verification that the value-sets
	only shrink during iteration.
	(compute_partial_antic_aux): Adjust for the phi_translate changes.
	(do_pre_regular_insertion): Likewise.
	(do_pre_partial_partial_insertion): Likewise.

	* gcc.dg/torture/pr84427.c: New testcase.

From-SVN: r258124

gcc/ChangeLog

 2018-03-02  Richard Biener  <rguenther@suse.de>
 
+	PR tree-optimization/84427
+	* tree-ssa-pre.c (bitmap_remove_expr_from_set): Remove.
+	(bitmap_set_subtract_values): Rewrite to handle multiple
+	exprs per value.
+	(clean): Likewise.
+	(prune_clobbered_mems): Likewise.
+	(phi_translate): Take edge instead of pred/phiblock.
+	(phi_translate_1): Likewise.
+	(phi_translate_set): Likewise.  Insert all translated
+	exprs for a value into the set, keeping possibly multiple
+	expressions per value.
+	(compute_antic_aux): Adjust for phi_translate changes.
+	When intersecting union the expressions and prune those
+	not in the final value set, keeping possibly multiple
+	expressions per value.  Do not use value-insertion
+	for unioning ANTIC_OUT U EXP_GEN - TMP_GEN but merge
+	all expressions.  Add verification that the value-sets
+	only shrink during iteration.
+	(compute_partial_antic_aux): Adjust for the phi_translate changes.
+	(do_pre_regular_insertion): Likewise.
+	(do_pre_partial_partial_insertion): Likewise.
+
+2018-03-02  Richard Biener  <rguenther@suse.de>
+
 	PR target/82005
 	* config/darwin.c (saved_debug_info_level): New static global.
 	(darwin_asm_lto_start): Disable debug info generation for LTO out.

gcc/testsuite/ChangeLog

+2018-03-02  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/84427
+	* gcc.dg/torture/pr84427.c: New testcase.
+
 2018-03-01  Peter Bergner  <bergner@vnet.ibm.com>
 
 	PR target/84534

gcc/testsuite/gcc.dg/torture/pr84427.c

+/* { dg-do compile } */
+
+short a, d, e;
+unsigned char b;
+int c, f;
+char g, h;
+void fn2(int, int);
+void fn1() { fn2(e, a); }
+void fn2(int p1, int p2)
+{
+l1:
+  b = a;
+  for (; h; h--)
+    if (p1)
+      g = p2 * c;
+    else
+      {
+	c = d;
+	if (f)
+	  goto l1;
+      }
+}