Teach -Wsign-compare to treat 1 << blah as "idiomatically non-negative".
Fixes a spurious warning in LLVM.
llvm-svn: 100595
diff --git a/clang/test/Sema/compare.c b/clang/test/Sema/compare.c
index 7c8c36f..631b694 100644
--- a/clang/test/Sema/compare.c
+++ b/clang/test/Sema/compare.c
@@ -282,3 +282,8 @@
&& (x >= 0) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
&& (0 <= x); // expected-warning {{comparison of 0 <= unsigned expression is always true}}
}
+
+int test6(unsigned i, unsigned power) {
+ unsigned x = (i < (1 << power) ? i : 0);
+ return x != 3 ? 1 << power : i;
+}