re PR tree-optimization/87117 (ICE in eliminate_dom_walker::eliminate_cleanup(bool...

2018-08-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/87117
	* tree-ssa-sccvn.c (fully_constant_vn_reference_p): Exclude
	void which is is_gimple_reg_type by checking for COMPLETE_TYPE_P.

	* gcc.dg/pr87117-1.c: New testcase.

From-SVN: r263911

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dd3ca99..694fdf2 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2018-08-28  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/87117
+       * tree-ssa-sccvn.c (fully_constant_vn_reference_p): Exclude
+       void which is is_gimple_reg_type by checking for COMPLETE_TYPE_P.
+
+2018-08-28  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/87117
        * tree-ssa-pre.c (compute_avail): Do not make expressions
        with predicated values available.
        (get_expr_value_id): Assert we do not run into predicated value

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index aa6f770..bf4f5f7 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2018-08-28  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/87117
+       * gcc.dg/pr87117-1.c: New testcase.
+
+2018-08-28  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/87117
        * gcc.dg/pr87117-2.c: New testcase.
 
 2018-08-28  Richard Biener  <rguenther@suse.de>

diff --git a/gcc/testsuite/gcc.dg/pr87117-1.c b/gcc/testsuite/gcc.dg/pr87117-1.c
new file mode 100644 (file)
index 0000000..06d7008
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr87117-1.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-inline -fno-tree-dce" } */
+
+int a, b, c;
+long *d;
+void fn1()
+{
+  for (; 0 < a;)
+    a++;
+}
+void fn3()
+{
+  for (; c; c++)
+    d[c] = 0;
+}
+void fn2()
+{
+  if (b)
+    fn3();
+  fn1();
+}

diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index 4267648..381fc8d 100644 (file)
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -1408,6 +1408,7 @@ fully_constant_vn_reference_p (vn_reference_t ref)
 
   /* Simplify reads from constants or constant initializers.  */
   else if (BITS_PER_UNIT == 8
+          && COMPLETE_TYPE_P (ref->type)
           && is_gimple_reg_type (ref->type)
           && (!INTEGRAL_TYPE_P (ref->type)
               || TYPE_PRECISION (ref->type) % BITS_PER_UNIT == 0))