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
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1 files changed, 85 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/Wparentheses-4.c b/gcc/testsuite/gcc.dg/Wparentheses-4.c
new file mode 100644
index 000000000..dfc9d1008
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wparentheses-4.c
@@ -0,0 +1,85 @@
+/* Test operation of -Wparentheses.  Precedence warnings.  + or -
+   inside shift.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+
+/* { dg-do compile } */
+/* { dg-options "-Wparentheses" } */
+
+int foo (int);
+
+int
+bar (int a, int b, int c)
+{
+  foo (a + b << c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a + b) << c);
+  foo (a + (b << c));
+  foo (1 + 2 << c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 + 2) << c);
+  foo (1 + (2 << c));
+  foo (1 + 2 << 3); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 + 2) << 3);
+  foo (1 + (2 << 3));
+  foo (a << b + c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a << b) + c);
+  foo (a << (b + c));
+  foo (1 << 2 + c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 << 2) + c);
+  foo (1 << (2 + c));
+  foo (1 << 2 + 3); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 << 2) + 3);
+  foo (1 << (2 + 3));
+  foo (a + b >> c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a + b) >> c);
+  foo (a + (b >> c));
+  foo (1 + 2 >> c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 + 2) >> c);
+  foo (1 + (2 >> c));
+  foo (1 + 2 >> 3); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 + 2) >> 3);
+  foo (1 + (2 >> 3));
+  foo (a >> b + c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a >> b) + c);
+  foo (a >> (b + c));
+  foo (1 >> 2 + c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 >> 2) + c);
+  foo (1 >> (2 + c));
+  foo (1 >> 2 + 3); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((1 >> 2) + 3);
+  foo (1 >> (2 + 3));
+  foo (a - b << c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a - b) << c);
+  foo (a - (b << c));
+  foo (6 - 5 << c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 - 5) << c);
+  foo (6 - (5 << c));
+  foo (6 - 5 << 4); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 - 5) << 4);
+  foo (6 - (5 << 4));
+  foo (a << b - c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a << b) - c);
+  foo (a << (b - c));
+  foo (6 << 5 - c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 << 5) - c);
+  foo (6 << (5 - c));
+  foo (6 << 5 - 4); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 << 5) - 4);
+  foo (6 << (5 - 4));
+  foo (a - b >> c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a - b) >> c);
+  foo (a - (b >> c));
+  foo (6 - 5 >> c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 - 5) >> c);
+  foo (6 - (5 >> c));
+  foo (6 - 5 >> 4); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 - 5) >> 4);
+  foo (6 - (5 >> 4));
+  foo (a >> b - c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((a >> b) - c);
+  foo (a >> (b - c));
+  foo (6 >> 5 - c); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 >> 5) - c);
+  foo (6 >> (5 - c));
+  foo (6 >> 5 - 4); /* { dg-warning "parentheses" "correct warning" } */
+  foo ((6 >> 5) - 4);
+  foo (6 >> (5 - 4));
+}