re PR ipa/83051 (ICE on valid code at -O3: in edge_badness, at ipa-inline.c:1024)

	PR ipa/83051
	* gcc.c-torture/compile/pr83051.c: New testcase.
	* ipa-inline.c (edge_badness): Tolerate roundoff errors.

From-SVN: r256659

gcc/ChangeLog

+2018-01-14  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/83051
+	* ipa-inline.c (edge_badness): Tolerate roundoff errors.
+
 2018-01-14  Richard Sandiford  <richard.sandiford@linaro.org>
 
 	* ipa-inline.c (want_inline_small_function_p): Return false if

gcc/ipa-inline.c

@@ -997,7 +997,8 @@ edge_badness (struct cgraph_edge *edge, bool dump)
   /* Check that inlined time is better, but tolerate some roundoff issues.
      FIXME: When callee profile drops to 0 we account calls more.  This
      should be fixed by never doing that.  */
-  gcc_checking_assert ((edge_time - callee_info->time).to_int () <= 0
+  gcc_checking_assert ((edge_time * 100
+			- callee_info->time * 101).to_int () <= 0
 			|| callee->count.ipa ().initialized_p ());
   gcc_checking_assert (growth <= callee_info->size);
 

gcc/testsuite/ChangeLog

+2018-01-14  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/83051
+	* gcc.c-torture/compile/pr83051.c: New testcase.
+
 2018-01-14  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
 
 	PR tree-optimization/83501

gcc/testsuite/gcc.c-torture/compile/pr83051.c

+
+int a[1], b, c, d, e, f, g, h;
+
+void fn1 (int p)
+{ 
+  b = b >> 8 ^ a[b ^ (c & 5)] >> 8 ^ a[(b ^ c) & 5];
+  b = b >> 8 ^ a[(b ^ c) & 5];
+}
+
+static void fn2 ()
+{ 
+  int k;
+  while (1)
+    while (e)
+      { 
+        while (g)
+          while (h)
+            for (k = 0; k < 6; k++)
+              while (f)
+                fn1 (0);
+        fn1 (0);
+        fn1 (0);
+        fn1 (0);
+      }
+}
+
+int main ()
+{ 
+  fn2 ();
+  return 0;
+}