Add PNaCl TargetInfo to Clang

test/Driver/le32-unknown-nacl.cpp

+// RUN: %clang -ccc-host-triple le32-unknown-nacl -ccc-echo %s -emit-llvm -c 2>&1 | FileCheck %s -check-prefix=ECHO
+// RUN: %clang -ccc-host-triple le32-unknown-nacl %s -emit-llvm -S -c -o - | FileCheck %s
+
+// ECHO: clang{{.*}} -cc1 {{.*}}le32-unknown-nacl.c
+
+// Check platform defines
+#include <stddef.h>
+
+extern "C" {
+
+#ifdef __native_client__
+void __native_client__defined() {
+  // CHECK: __native_client__defined
+}
+#endif
+
+#ifdef __le32__
+void __le32__defined() {
+  // CHECK: __le32__defined
+}
+#endif
+
+#ifdef __pnacl__
+void __pnacl__defined() {
+  // CHECK: __pnacl__defined
+}
+#endif
+
+// Check types
+
+// CHECK: signext i8 @check_char()
+char check_char() { return 0; }
+
+// CHECK: signext i16 @check_short()
+short check_short() { return 0; }
+
+// CHECK: i32 @check_int()
+int check_int() { return 0; }
+
+// CHECK: i32 @check_long()
+long check_long() { return 0; }
+
+// CHECK: i64 @check_longlong()
+long long check_longlong() { return 0; }
+
+// CHECK: zeroext i8 @check_uchar()
+unsigned char check_uchar() { return 0; }
+
+// CHECK: zeroext i16 @check_ushort()
+unsigned short check_ushort() { return 0; }
+
+// CHECK: i32 @check_uint()
+unsigned int check_uint() { return 0; }
+
+// CHECK: i32 @check_ulong()
+unsigned long check_ulong() { return 0; }
+
+// CHECK: i64 @check_ulonglong()
+unsigned long long check_ulonglong() { return 0; }
+
+// CHECK: i32 @check_size_t()
+size_t check_size_t() { return 0; }
+
+// CHECK: float @check_float()
+float check_float() { return 0; }
+
+// CHECK: double @check_double()
+double check_double() { return 0; }
+
+// CHECK: double @check_longdouble()
+long double check_longdouble() { return 0; }
+
+}
+
+#include <stdarg.h>
+
+template<int> void Switch();
+template<> void Switch<4>();
+template<> void Switch<8>();
+template<> void Switch<16>();
+
+void check_pointer_size() {
+  // CHECK: SwitchILi4
+  Switch<sizeof(void*)>();
+
+  // CHECK: SwitchILi8
+  Switch<sizeof(long long)>();
+
+  // CHECK: SwitchILi16
+  Switch<sizeof(va_list)>();
+}