Remove wrong assert about gcov_type (PR lto/79587).

2017-02-22  Martin Liska  <mliska@suse.cz>

	PR lto/79587
	* data-streamer-in.c (streamer_read_gcov_count): Remove assert.
	* data-streamer-out.c (streamer_write_gcov_count_stream):
	Likewise.
	* value-prof.c (stream_out_histogram_value): Make assert more
	precise based on type of counter.
2017-02-22  Martin Liska  <mliska@suse.cz>

	PR lto/79587
	* gcc.dg/tree-prof/pr79587.c: New test.

From-SVN: r245647

6 files changed, 51 insertions, 3 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c0f554f..1911946 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2017-02-22  Martin Liska  <mliska@suse.cz>
+
+	PR lto/79587
+	* data-streamer-in.c (streamer_read_gcov_count): Remove assert.
+	* data-streamer-out.c (streamer_write_gcov_count_stream):
+	Likewise.
+	* value-prof.c (stream_out_histogram_value): Make assert more
+	precise based on type of counter.
+
 2017-02-21 Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/79621
diff --git a/gcc/data-streamer-in.c b/gcc/data-streamer-in.c
index b38d913..ad32ce1 100644
--- a/gcc/data-streamer-in.c
+++ b/gcc/data-streamer-in.c
@@ -181,7 +181,6 @@ gcov_type
 streamer_read_gcov_count (struct lto_input_block *ib)
 {
   gcov_type ret = streamer_read_hwi (ib);
-  gcc_assert (ret >= 0);
   return ret;
 }
 
diff --git a/gcc/data-streamer-out.c b/gcc/data-streamer-out.c
index 1ee8c9f..1e8feb1 100644
--- a/gcc/data-streamer-out.c
+++ b/gcc/data-streamer-out.c
@@ -340,7 +340,6 @@ streamer_write_hwi_stream (struct lto_output_stream *obs, HOST_WIDE_INT work)
 void
 streamer_write_gcov_count_stream (struct lto_output_stream *obs, gcov_type work)
 {
-  gcc_assert (work >= 0);
   gcc_assert ((HOST_WIDE_INT) work == work);
   streamer_write_hwi_stream (obs, work);
 }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b76d0a3..19ddc6e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-02-22  Martin Liska  <mliska@suse.cz>
+
+	PR lto/79587
+	* gcc.dg/tree-prof/pr79587.c: New test.
+
 2017-02-21  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/79535
diff --git a/gcc/testsuite/gcc.dg/tree-prof/pr79587.c b/gcc/testsuite/gcc.dg/tree-prof/pr79587.c
new file mode 100644
index 0000000..517e081
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-prof/pr79587.c
@@ -0,0 +1,26 @@
+/* { dg-require-effective-target lto } */
+/* { dg-options "-O2 -flto" } */
+
+unsigned long global = -12345;
+
+unsigned long
+__attribute__((noinline))
+test(unsigned long v, unsigned long v2)
+{
+  unsigned long x = v % v2;
+
+  return x;
+}
+
+int main(int argc, char **argv)
+{
+  unsigned long r = 0;
+
+  for (int i = 0; i < 100; i++)
+    r += test(argc, global);
+
+  if (r != 100)
+    __builtin_abort ();
+
+  return 0;
+}
diff --git a/gcc/value-prof.c b/gcc/value-prof.c
index 097e409..22dc2c9 100644
--- a/gcc/value-prof.c
+++ b/gcc/value-prof.c
@@ -365,7 +365,17 @@ stream_out_histogram_value (struct output_block *ob, histogram_value hist)
       break;
     }
   for (i = 0; i < hist->n_counters; i++)
-    streamer_write_gcov_count (ob, hist->hvalue.counters[i]);
+    {
+      /* When user uses an unsigned type with a big value, constant converted
+	 to gcov_type (a signed type) can be negative.  */
+      gcov_type value = hist->hvalue.counters[i];
+      if (hist->type == HIST_TYPE_SINGLE_VALUE && i == 0)
+	;
+      else
+	gcc_assert (value >= 0);
+
+      streamer_write_gcov_count (ob, value);
+    }
   if (hist->hvalue.next)
     stream_out_histogram_value (ob, hist->hvalue.next);
 }