From: Richard Biener <rguenther@suse.de>
Date: Fri, 7 Jun 2019 12:14:55 +0000 (+0000)
Subject: re PR debug/90574 ([gdb] gdb wrongly stopped at a breakpoint in an unexecuted line... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e733243a3693142bd9c9486451c38d2dc20270ac;p=gcc.git

re PR debug/90574 ([gdb] gdb wrongly stopped at a breakpoint in an unexecuted line of code)

2019-06-07  Richard Biener  <rguenther@suse.de>

	PR debug/90574
	* tree-cfg.c (stmt_starts_bb_p): Split blocks at labels
	that appear after user labels.

	* gcc.misc-tests/gcov-pr90574-1.c: New testcase.
	* gcc.misc-tests/gcov-pr90574-2.c: Likewise.

From-SVN: r272040
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a1cffe10a32..41e364b7f48 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-06-07  Richard Biener  <rguenther@suse.de>
+
+	PR debug/90574
+	* tree-cfg.c (stmt_starts_bb_p): Split blocks at labels
+	that appear after user labels.
+
 2019-06-07  Martin Liska  <mliska@suse.cz>
 
 	* cselib.c (cselib_init): Disable hash table
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9410686a9f7..75ff9daf2e3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2019-06-07  Richard Biener  <rguenther@suse.de>
+
+	PR debug/90574
+	* gcc.misc-tests/gcov-pr90574-1.c: New testcase.
+	* gcc.misc-tests/gcov-pr90574-2.c: Likewise.
+
 2019-06-07  Jan Hubicka  <hubicka@ucw.cz>
 
 	* gcc.dg/lto/alias-access-path-2.0.c: New testcase.
diff --git a/gcc/testsuite/gcc.misc-tests/gcov-pr90574-1.c b/gcc/testsuite/gcc.misc-tests/gcov-pr90574-1.c
new file mode 100644
index 00000000000..41ac9bb3ecc
--- /dev/null
+++ b/gcc/testsuite/gcc.misc-tests/gcov-pr90574-1.c
@@ -0,0 +1,20 @@
+/* { dg-options "-fprofile-arcs -ftest-coverage" } */
+/* { dg-do run { target native } } */
+
+int main(int argc, char **argv)
+{
+  if (argc == 0)
+    {
+      int *ptr;
+label:  /* count(#####) */
+	{
+	}
+    }
+  if (argc == 1)
+    {
+      __builtin_printf("hello\n");
+    }
+  return 0;
+}
+
+/* { dg-final { run-gcov gcov-pr90574-1.c } } */
diff --git a/gcc/testsuite/gcc.misc-tests/gcov-pr90574-2.c b/gcc/testsuite/gcc.misc-tests/gcov-pr90574-2.c
new file mode 100644
index 00000000000..2db70c96f71
--- /dev/null
+++ b/gcc/testsuite/gcc.misc-tests/gcov-pr90574-2.c
@@ -0,0 +1,15 @@
+/* { dg-options "-fprofile-arcs -ftest-coverage" } */
+/* { dg-do run { target native } } */
+
+int main(int argc, char **argv)
+{
+  switch (argc)
+    {
+    case 0:
+      foo: /* count(#####) */
+    case 1:;
+    }
+  return 0;
+}
+
+/* { dg-final { run-gcov gcov-pr90574-2.c } } */
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 94b258498dc..a585efea3d8 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -2722,10 +2722,10 @@ stmt_starts_bb_p (gimple *stmt, gimple *prev_stmt)
 	  || FORCED_LABEL (gimple_label_label (label_stmt)))
 	return true;
 
-      if (prev_stmt && gimple_code (prev_stmt) == GIMPLE_LABEL)
+      if (glabel *plabel = safe_dyn_cast <glabel *> (prev_stmt))
 	{
-	  if (DECL_NONLOCAL (gimple_label_label (
-			       as_a <glabel *> (prev_stmt))))
+	  if (DECL_NONLOCAL (gimple_label_label (plabel))
+	      || !DECL_ARTIFICIAL (gimple_label_label (plabel)))
 	    return true;
 
 	  cfg_stats.num_merged_labels++;