[MS] Add support for __ud2 and __int2c MSVC intrinsics
This was requested in PR31958 and elsewhere.
llvm-svn: 297057
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 19b9c9b..1c7ee2e 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -7982,6 +7982,21 @@
// instruction, but it will create a memset that won't be optimized away.
return Builder.CreateMemSet(Ops[0], Ops[1], Ops[2], 1, true);
}
+ case X86::BI__ud2:
+ // llvm.trap makes a ud2a instruction on x86.
+ return EmitTrapCall(Intrinsic::trap);
+ case X86::BI__int2c: {
+ // This syscall signals a driver assertion failure in x86 NT kernels.
+ llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy, false);
+ llvm::InlineAsm *IA =
+ llvm::InlineAsm::get(FTy, "int $$0x2c", "", /*SideEffects=*/true);
+ llvm::AttributeSet NoReturnAttr =
+ AttributeSet::get(getLLVMContext(), llvm::AttributeSet::FunctionIndex,
+ llvm::Attribute::NoReturn);
+ CallSite CS = Builder.CreateCall(IA);
+ CS.setAttributes(NoReturnAttr);
+ return CS.getInstruction();
+ }
}
}