diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 9ce333d4af1e..6a3d57b405bf 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -619,6 +619,8 @@ public:
     this->DoubleAlign = 64;
     this->LongDoubleWidth = 64;
     this->LongDoubleAlign = 64;
+    this->LongLongWidth = 64;
+    this->LongLongAlign = 64;
     this->SizeType = TargetInfo::UnsignedInt;
     this->PtrDiffType = TargetInfo::SignedInt;
     this->IntPtrType = TargetInfo::SignedInt;
diff --git a/clang/test/CodeGen/long-double-x86-nacl.c b/clang/test/CodeGen/long-double-x86-nacl.c
deleted file mode 100644
index cec381a06b9b..000000000000
--- a/clang/test/CodeGen/long-double-x86-nacl.c
+++ /dev/null
@@ -1,7 +0,0 @@
-// RUN: %clang_cc1 %s -emit-llvm -o - -triple=i686-unknown-nacl | FileCheck %s
-
-long double x = 0;
-int checksize[sizeof(x) == 8 ? 1 : -1];
-
-// CHECK-LABEL: define void @s1(double %a)
-void s1(long double a) {}
diff --git a/clang/test/CodeGen/malign-double-x86-nacl.c b/clang/test/CodeGen/malign-double-x86-nacl.c
new file mode 100644
index 000000000000..d67315582bc3
--- /dev/null
+++ b/clang/test/CodeGen/malign-double-x86-nacl.c
@@ -0,0 +1,43 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - -triple=i686-unknown-nacl | FileCheck %s
+// Check that i686-nacl essentially has -malign-double, which aligns
+// double, long double, and long long to 64-bits.
+
+int checksize[sizeof(long double) == 8 ? 1 : -1];
+int checkalign[__alignof(long double) == 8 ? 1 : -1];
+
+// CHECK-LABEL: define void @s1(double %a)
+void s1(long double a) {}
+
+struct st_ld {
+  char c;
+  long double ld;
+};
+int checksize2[sizeof(struct st_ld) == 16 ? 1 : -1];
+int checkalign2[__alignof(struct st_ld) == 8 ? 1 : -1];
+
+int checksize3[sizeof(double) == 8 ? 1 : -1];
+int checkalign3[__alignof(double) == 8 ? 1 : -1];
+
+// CHECK-LABEL: define void @s2(double %a)
+void s2(double a) {}
+
+struct st_d {
+  char c;
+  double d;
+};
+int checksize4[sizeof(struct st_d) == 16 ? 1 : -1];
+int checkalign4[__alignof(struct st_d) == 8 ? 1 : -1];
+
+
+int checksize5[sizeof(long long) == 8 ? 1 : -1];
+int checkalign5[__alignof(long long) == 8 ? 1 : -1];
+
+// CHECK-LABEL: define void @s3(i64 %a)
+void s3(long long a) {}
+
+struct st_ll {
+  char c;
+  long long ll;
+};
+int checksize6[sizeof(struct st_ll) == 16 ? 1 : -1];
+int checkalign6[__alignof(struct st_ll) == 8 ? 1 : -1];