Fix <rdar://problem/6848739>. When using -analyze, -Werror has no effect.

llvm-svn: 71172

clang/test/Analysis/override-werror.c

@@ -0,0 +1,15 @@
+// RUN: clang-cc -analyze -checker-cfref -Werror %s -analyzer-store=basic -verify &&
+// RUN: clang-cc -analyze -checker-cfref -Werror %s -analyzer-store=region -verify
+
+// This test case illustrates that using '-analyze' overrides the effect of
+// -Werror.  This allows basic warnings not to interfere with producing
+// analyzer results.
+
+char* f(int *p) { 
+  return p; // expected-warning{{incompatible pointer types returning 'int *', expected 'char *'}}
+}
+
+void g(int *p) {
+  if (!p) *p = 0; // expected-warning{{null}}  
+}
+

clang/tools/clang-cc/AnalysisConsumer.cpp

@@ -654,6 +654,9 @@ ASTConsumer* clang::CreateAnalysisConsumer(Diagnostic &diags, Preprocessor* pp,
 #include "Analyses.def"
       default: break;
     }
+  
+  // Last, disable the effects of '-Werror' when using the AnalysisConsumer.
+  diags.setWarningsAsErrors(false);
 
   return C.take();
 }