diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 6a4f65a..8ae0cbe 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -1597,6 +1597,56 @@
     return SemaBuiltinCpuSupports(*this, TheCall);
   case X86::BI__builtin_ms_va_start:
     return SemaBuiltinMSVAStart(TheCall);
+  case X86::BI__builtin_ia32_addcarryx_u64:
+  case X86::BI__builtin_ia32_addcarry_u64:
+  case X86::BI__builtin_ia32_subborrow_u64:
+  case X86::BI__builtin_ia32_readeflags_u64:
+  case X86::BI__builtin_ia32_writeeflags_u64:
+  case X86::BI__builtin_ia32_bextr_u64:
+  case X86::BI__builtin_ia32_bextri_u64:
+  case X86::BI__builtin_ia32_bzhi_di:
+  case X86::BI__builtin_ia32_pdep_di:
+  case X86::BI__builtin_ia32_pext_di:
+  case X86::BI__builtin_ia32_crc32di:
+  case X86::BI__builtin_ia32_fxsave64:
+  case X86::BI__builtin_ia32_fxrstor64:
+  case X86::BI__builtin_ia32_xsave64:
+  case X86::BI__builtin_ia32_xrstor64:
+  case X86::BI__builtin_ia32_xsaveopt64:
+  case X86::BI__builtin_ia32_xrstors64:
+  case X86::BI__builtin_ia32_xsavec64:
+  case X86::BI__builtin_ia32_xsaves64:
+  case X86::BI__builtin_ia32_rdfsbase64:
+  case X86::BI__builtin_ia32_rdgsbase64:
+  case X86::BI__builtin_ia32_wrfsbase64:
+  case X86::BI__builtin_ia32_wrgsbase64:
+  case X86::BI__builtin_ia32_pbroadcastb512_gpr_mask:
+  case X86::BI__builtin_ia32_pbroadcastb256_gpr_mask:
+  case X86::BI__builtin_ia32_pbroadcastb128_gpr_mask:
+  case X86::BI__builtin_ia32_vcvtsd2si64:
+  case X86::BI__builtin_ia32_vcvtsd2usi64:
+  case X86::BI__builtin_ia32_vcvtss2si64:
+  case X86::BI__builtin_ia32_vcvtss2usi64:
+  case X86::BI__builtin_ia32_vcvttsd2si64:
+  case X86::BI__builtin_ia32_vcvttsd2usi64:
+  case X86::BI__builtin_ia32_vcvttss2si64:
+  case X86::BI__builtin_ia32_vcvttss2usi64:
+  case X86::BI__builtin_ia32_cvtss2si64:
+  case X86::BI__builtin_ia32_cvttss2si64:
+  case X86::BI__builtin_ia32_cvtsd2si64:
+  case X86::BI__builtin_ia32_cvttsd2si64:
+  case X86::BI__builtin_ia32_cvtsi2sd64:
+  case X86::BI__builtin_ia32_cvtsi2ss64:
+  case X86::BI__builtin_ia32_cvtusi2sd64:
+  case X86::BI__builtin_ia32_cvtusi2ss64:
+  case X86::BI__builtin_ia32_rdseed64_step: {
+    // These builtins only work on x86-64 targets.
+    const llvm::Triple &TT = Context.getTargetInfo().getTriple();
+    if (TT.getArch() != llvm::Triple::x86_64)
+      return Diag(TheCall->getCallee()->getLocStart(),
+                  diag::err_x86_builtin_32_bit_tgt);
+    return false;
+  }
   case X86::BI__builtin_ia32_extractf64x4_mask:
   case X86::BI__builtin_ia32_extracti64x4_mask:
   case X86::BI__builtin_ia32_extractf32x8_mask: