Index: cfe/trunk/lib/CodeGen/ModuleBuilder.cpp
===================================================================
--- cfe/trunk/lib/CodeGen/ModuleBuilder.cpp
+++ cfe/trunk/lib/CodeGen/ModuleBuilder.cpp
@@ -199,15 +199,18 @@
     }
 
     void HandleTranslationUnit(ASTContext &Ctx) override {
+      // Release the Builder when there is no error.
+      if (!Diags.hasErrorOccurred() && Builder)
+        Builder->Release();
+
+      // If there are errors before or when releasing the Builder, reset
+      // the module to stop here before invoking the backend.
       if (Diags.hasErrorOccurred()) {
         if (Builder)
           Builder->clear();
         M.reset();
         return;
       }
-
-      if (Builder)
-        Builder->Release();
     }
 
     void AssignInheritanceModel(CXXRecordDecl *RD) override {
Index: cfe/trunk/test/CodeGen/target-builtin-error-3.c
===================================================================
--- cfe/trunk/test/CodeGen/target-builtin-error-3.c
+++ cfe/trunk/test/CodeGen/target-builtin-error-3.c
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin -S -verify -o - -target-feature +avx
+
+// RUN: not %clang_cc1 %s -triple=x86_64-apple-darwin -emit-obj -target-feature +avx 2> %t.err
+// RUN: FileCheck < %t.err %s
+// CHECK: 1 error generated
+
+typedef unsigned short uint16_t;
+typedef long long __m128i __attribute__((__vector_size__(16)));
+typedef float __v8sf __attribute__ ((__vector_size__ (32)));
+typedef float __m256 __attribute__ ((__vector_size__ (32)));
+typedef uint16_t half;
+typedef __attribute__ ((ext_vector_type( 8),__aligned__( 16))) half half8;
+typedef __attribute__ ((ext_vector_type(16),__aligned__( 32))) half half16;
+typedef __attribute__ ((ext_vector_type(16),__aligned__( 2))) half half16U;
+typedef __attribute__ ((ext_vector_type( 8),__aligned__( 32))) float float8;
+typedef __attribute__ ((ext_vector_type(16),__aligned__( 64))) float float16;
+static inline half8 __attribute__((__overloadable__)) convert_half( float8 a ) {
+  return __extension__ ({ __m256 __a = (a); (__m128i)__builtin_ia32_vcvtps2ph256((__v8sf)__a, (0x00)); }); // expected-error {{'__builtin_ia32_vcvtps2ph256' needs target feature f16c}}
+}
+static inline half16 __attribute__((__overloadable__)) convert_half( float16 a ) {
+  half16 r; 
+  r.lo = convert_half( a.lo); 
+  return r;
+}
+void avx_test( uint16_t *destData, float16 argbF)
+{
+   ((half16U*)destData)[0] = convert_half(argbF);
+}