[x32] Add __int128 support

[pavel.v.chupin]

Summary

Adding __int128 support explicitly for x86_64 because currently it's on
only when pointer size >= 64 which is not the case for x32.

[atanasyan]

LGTM

[pavel.v.chupin]

Closed by commit rL214710 (authored by pvchupin).

cfe/trunk/lib/Basic/Targets.cpp

return (CC == CC_C ||
             CC == CC_IntelOclBicc ||
             CC == CC_X86_64Win64) ? CCCR_OK : CCCR_Warning;
   }
 
   CallingConv getDefaultCallingConv(CallingConvMethodType MT) const override {
     return CC_C;
   }
 
+  // for x32 we need it here explicitly
+  bool hasInt128Type() const override { return true; }
 };
 } // end anonymous namespace
 
 namespace {
 // x86-64 Windows target
 class WindowsX86_64TargetInfo : public WindowsTargetInfo<X86_64TargetInfo> {
 public:
   WindowsX86_64TargetInfo(const llvm::Triple &Triple)

cfe/trunk/test/Sema/types.c

 // RUN: %clang_cc1 %s -pedantic -verify -triple=x86_64-apple-darwin9
 // RUN: %clang_cc1 %s -pedantic -verify -triple=mips64-linux-gnu
+// RUN: %clang_cc1 %s -pedantic -verify -triple=x86_64-unknown-linux
+// RUN: %clang_cc1 %s -pedantic -verify -triple=x86_64-unknown-linux-gnux32
 
 // rdar://6097662
 typedef int (*T)[2];
 restrict T x;
 
 typedef int *S[2];
 restrict S y; // expected-error {{restrict requires a pointer or reference ('S' (aka 'int *[2]') is invalid)}}