re PR middle-end/77624 (ICE on x86_64-linux-gnu (internal compiler error: in fold_builtin_atomic_always_lock_free, at builtins.c:5583))

	PR middle-end/77624
	* builtins.c (fold_builtin_atomic_always_lock_free): Only look through
	cast to void * if the cast is from some other pointer type.

	* c-c++-common/pr77624-1.c: New test.
	* c-c++-common/pr77624-2.c: New test.

From-SVN: r240263

5 files changed, 56 insertions, 2 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7ab0b82009e..fbc0724fc2b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-09-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/77624
+	* builtins.c (fold_builtin_atomic_always_lock_free): Only look through
+	cast to void * if the cast is from some other pointer type.
+
 2016-09-20  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/77646
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 189aeac6912..9a19a75cc8e 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -5575,8 +5575,10 @@ fold_builtin_atomic_always_lock_free (tree arg0, tree arg1)
 	 end before anything else has a chance to look at it.  The pointer
 	 parameter at this point is usually cast to a void *, so check for that
 	 and look past the cast.  */
-      if (CONVERT_EXPR_P (arg1) && POINTER_TYPE_P (ttype)
-	  && VOID_TYPE_P (TREE_TYPE (ttype)))
+      if (CONVERT_EXPR_P (arg1)
+	  && POINTER_TYPE_P (ttype)
+	  && VOID_TYPE_P (TREE_TYPE (ttype))
+	  && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (arg1, 0))))
 	arg1 = TREE_OPERAND (arg1, 0);
 
       ttype = TREE_TYPE (arg1);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dc99d913daa..d434027b52b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-09-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/77624
+	* c-c++-common/pr77624-1.c: New test.
+	* c-c++-common/pr77624-2.c: New test.
+
 2016-09-20  Andre Vehreschild  <vehre@gcc.gnu.org>
 
 	* gfortran.dg/coarray_allocate_7.f08: Using + instead of fixed number
diff --git a/gcc/testsuite/c-c++-common/pr77624-1.c b/gcc/testsuite/c-c++-common/pr77624-1.c
new file mode 100644
index 00000000000..f3c095649aa
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr77624-1.c
@@ -0,0 +1,14 @@
+/* PR middle-end/77624 */
+/* { dg-do compile } */
+
+int
+foo (int a)
+{
+  return __atomic_is_lock_free (2, a);		/* { dg-warning "pointer from integer" "" { target c } } */
+}						/* { dg-error "invalid conversion" "" { target c++ } 7 } */
+
+int
+bar (int a)
+{
+  return __atomic_always_lock_free (2, a);	/* { dg-warning "pointer from integer" "" { target c } } */
+}						/* { dg-error "invalid conversion" "" { target c++ } 13 } */
diff --git a/gcc/testsuite/c-c++-common/pr77624-2.c b/gcc/testsuite/c-c++-common/pr77624-2.c
new file mode 100644
index 00000000000..64d20e0eb6a
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr77624-2.c
@@ -0,0 +1,26 @@
+/* PR middle-end/77624 */
+/* { dg-do compile } */
+
+void
+foo (int *a)
+{
+  double b = 0;
+  __atomic_is_lock_free (2, a, 2);	/* { dg-error "too many arguments" } */
+  __atomic_is_lock_free (2);		/* { dg-error "too few arguments" } */
+  __atomic_is_lock_free (2, b);		/* { dg-error "incompatible type" "" { target c } } */
+					/* { dg-message "expected" "" { target c } 10 } */
+					/* { dg-error "convert" "" { target c++ } 10 } */
+  __atomic_is_lock_free (2, 0);
+}
+
+void
+bar (int *a)
+{
+  double b = 0;
+  __atomic_always_lock_free (2, a, 2);	/* { dg-error "too many arguments" } */
+  __atomic_always_lock_free (2);	/* { dg-error "too few arguments" } */
+  __atomic_always_lock_free (2, b);	/* { dg-error "incompatible type" "" { target c } } */
+					/* { dg-message "expected" "" { target c } 22 } */
+					/* { dg-error "convert" "" { target c++ } 22 } */
+  __atomic_always_lock_free (2, 0);
+}