Index: lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
+++ lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp
@@ -93,7 +93,9 @@
 static auto findGCDAntiPatternWithSemaphore() -> decltype(compoundStmt()) {
 
   const char *SemaphoreBinding = "semaphore_name";
-  auto SemaphoreCreateM = callExpr(callsName("dispatch_semaphore_create"));
+  auto SemaphoreCreateM = callExpr(allOf(
+      callsName("dispatch_semaphore_create"),
+      hasArgument(0, ignoringParenCasts(integerLiteral(equals(0))))));
 
   auto SemaphoreBindingM = anyOf(
       forEachDescendant(
Index: test/Analysis/gcdantipatternchecker_test.m
===================================================================
--- test/Analysis/gcdantipatternchecker_test.m
+++ test/Analysis/gcdantipatternchecker_test.m
@@ -333,3 +333,13 @@
   }];
   dispatch_semaphore_wait(sema1, 100); // expected-warning{{Waiting on a callback using a semaphore}}
 }
+
+void no_warn_on_nonzero_semaphore(MyInterface1 *M) {
+  dispatch_semaphore_t sema1 = dispatch_semaphore_create(1);
+
+  [M acceptBlock:^{
+      dispatch_semaphore_signal(sema1);
+  }];
+  dispatch_semaphore_wait(sema1, 100); // no-warning
+}
+