From: Richard Biener <rguenther@suse.de>
Date: Tue, 13 Dec 2016 09:17:42 +0000 (+0000)
Subject: re PR tree-optimization/78742 (internal compiler error: in int_cst_value, at tree... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6182121c120a277dd38eb28e669866842a83a4dc;p=gcc.git

re PR tree-optimization/78742 (internal compiler error: in int_cst_value, at tree.c:10782)

2016-12-13  Richard Biener  <rguenther@suse.de>

	PR middle-end/78742
	* tree.c (cst_and_fits_in_hwi): Look if the actual value fits.
	* tree-object-size.c (compute_builtin_object_size): Use
	tree_fits_shwi_p.
	* tree-data-ref.c (initialize_matrix_A): Remove excess assert.

	* gcc.dg/torture/pr78742.c: New testcase.

From-SVN: r243598
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9ae13c5ed05..5e0562bbbef 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2016-12-13  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/78742
+	* tree.c (cst_and_fits_in_hwi): Look if the actual value fits.
+	* tree-object-size.c (compute_builtin_object_size): Use
+	tree_fits_shwi_p.
+	* tree-data-ref.c (initialize_matrix_A): Remove excess assert.
+
 2016-12-13  Martin Liska  <mliska@suse.cz>
 
 	* asan.c (asan_mark_poison_p): Remove.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ff7bd7868bc..6ad28bf9ce0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-12-13  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/78742
+	* gcc.dg/torture/pr78742.c: New testcase.
+
 2016-12-13  Martin Liska  <mliska@suse.cz>
 
 	* gcc.dg/asan/use-after-scope-goto-1.c: Update first argument of
diff --git a/gcc/testsuite/gcc.dg/torture/pr78742.c b/gcc/testsuite/gcc.dg/torture/pr78742.c
new file mode 100644
index 00000000000..c83ecbcb7d7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr78742.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target int128 } */
+
+void foo();
+
+void func()
+{
+  int m;
+
+  int tab[m];
+
+  __int128 j;
+  for(; j; j++)
+    {
+      tab[j] = 0;
+      tab[j+1] = 0;
+    }
+
+  foo();
+}
diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c
index 8152da3f180..1408c242f22 100644
--- a/gcc/tree-data-ref.c
+++ b/gcc/tree-data-ref.c
@@ -2118,8 +2118,6 @@ initialize_matrix_A (lambda_matrix A, tree chrec, unsigned index, int mult)
   switch (TREE_CODE (chrec))
     {
     case POLYNOMIAL_CHREC:
-      gcc_assert (TREE_CODE (CHREC_RIGHT (chrec)) == INTEGER_CST);
-
       A[index][0] = mult * int_cst_value (CHREC_RIGHT (chrec));
       return initialize_matrix_A (A, CHREC_LEFT (chrec), index + 1, mult);
 
diff --git a/gcc/tree-object-size.c b/gcc/tree-object-size.c
index 0fae183b330..f9c752198e0 100644
--- a/gcc/tree-object-size.c
+++ b/gcc/tree-object-size.c
@@ -538,7 +538,7 @@ compute_builtin_object_size (tree ptr, int object_size_type,
 	      tree offset = gimple_assign_rhs2 (def);
 	      ptr = gimple_assign_rhs1 (def);
 
-	      if (cst_and_fits_in_hwi (offset)
+	      if (tree_fits_shwi_p (offset)
 		  && compute_builtin_object_size (ptr, object_size_type, psize))
 		{
 		  /* Return zero when the offset is out of bounds.  */
diff --git a/gcc/tree.c b/gcc/tree.c
index 0f0e6753b19..2a603866522 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1677,7 +1677,7 @@ bool
 cst_and_fits_in_hwi (const_tree x)
 {
   return (TREE_CODE (x) == INTEGER_CST
-	  && TYPE_PRECISION (TREE_TYPE (x)) <= HOST_BITS_PER_WIDE_INT);
+	  && (tree_fits_shwi_p (x) || tree_fits_uhwi_p (x)));
 }
 
 /* Build a newly constructed VECTOR_CST node of length LEN.  */