Fix warnings in a static assert added to CFI.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@337178 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/cfi/cfi.cc b/lib/cfi/cfi.cc
index 5ee836569..a2f127f93 100644
--- a/lib/cfi/cfi.cc
+++ b/lib/cfi/cfi.cc
@@ -134,7 +134,8 @@ void ShadowBuilder::AddUnchecked(uptr begin, uptr end) {
   uint16_t *shadow_end = MemToShadow(end - 1, shadow_) + 1;
   // memset takes a byte, so our unchecked shadow value requires both bytes to
   // be the same. Make sure we're ok during compilation.
-  static_assert(kUncheckedShadow & 0xff == ((kUncheckedShadow >> 8) & 0xff));
+  static_assert((kUncheckedShadow & 0xff) == ((kUncheckedShadow >> 8) & 0xff),
+                "Both bytes of the 16-bit value must be the same!");
   memset(shadow_begin, kUncheckedShadow & 0xff,
          (shadow_end - shadow_begin) * sizeof(*shadow_begin));
 }