obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 68 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/Wparentheses-3.c b/gcc/testsuite/gcc.dg/Wparentheses-3.c
new file mode 100644
index 000000000..64899887c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wparentheses-3.c
@@ -0,0 +1,68 @@
+/* Test operation of -Wparentheses.  Warnings for assignments used as
+   truth-values.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+
+/* { dg-do compile } */
+/* { dg-options "-Wparentheses -std=gnu99" } */
+
+int foo (int);
+
+int a, b, c;
+_Bool d;
+
+int
+bar (void)
+{
+  if (a = b) /* { dg-warning "assignment" "correct warning" } */
+    foo (0);
+  if ((a = b))
+    foo (1);
+  if (a = a) /* { dg-warning "assignment" "correct warning" } */
+    foo (2);
+  if ((a = a))
+    foo (3);
+  if (b = c) /* { dg-warning "assignment" "correct warning" } */
+    foo (4);
+  else
+    foo (5);
+  if ((b = c))
+    foo (6);
+  else
+    foo (7);
+  if (b = b) /* { dg-warning "assignment" "correct warning" } */
+    foo (8);
+  else
+    foo (9);
+  if ((b = b))
+    foo (10);
+  else
+    foo (11);
+  while (c = b) /* { dg-warning "assignment" "correct warning" } */
+    foo (12);
+  while ((c = b))
+    foo (13);
+  while (c = c) /* { dg-warning "assignment" "correct warning" } */
+    foo (14);
+  while ((c = c))
+    foo (15);
+  do foo (16); while (a = b); /* { dg-warning "assignment" "correct warning" } */
+  do foo (17); while ((a = b));
+  do foo (18); while (a = a); /* { dg-warning "assignment" "correct warning" } */
+  do foo (19); while ((a = a));
+  for (;c = b;) /* { dg-warning "assignment" "correct warning" } */
+    foo (20);
+  for (;(c = b);)
+    foo (21);
+  for (;c = c;) /* { dg-warning "assignment" "correct warning" } */
+    foo (22);
+  for (;(c = c);)
+    foo (23);
+  d = a = b; /* { dg-warning "assignment" "correct warning" } */
+  foo (24);
+  d = (a = b);
+  foo (25);
+  d = a = a; /* { dg-warning "assignment" "correct warning" } */
+  foo (26);
+  d = (a = a);
+  foo (27);
+}