diff options
Diffstat (limited to 'clang/lib/CodeGen/CGBuiltin.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CGBuiltin.cpp | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp index 54d9fbba61d..7d0ec81ea22 100644 --- a/clang/lib/CodeGen/CGBuiltin.cpp +++ b/clang/lib/CodeGen/CGBuiltin.cpp @@ -6667,6 +6667,43 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID, return EmitSpecialRegisterBuiltin(*this, E, RegisterType, ValueType, IsRead); } + if (BuiltinID == AArch64::BI_ReadStatusReg || + BuiltinID == AArch64::BI_WriteStatusReg) { + LLVMContext &Context = CGM.getLLVMContext(); + + unsigned SysReg = + E->getArg(0)->EvaluateKnownConstInt(getContext()).getZExtValue(); + + std::string SysRegStr; + llvm::raw_string_ostream(SysRegStr) << + ((1 << 1) | ((SysReg >> 14) & 1)) << ":" << + ((SysReg >> 11) & 7) << ":" << + ((SysReg >> 7) & 15) << ":" << + ((SysReg >> 3) & 15) << ":" << + ( SysReg & 7); + + llvm::Metadata *Ops[] = { llvm::MDString::get(Context, SysRegStr) }; + llvm::MDNode *RegName = llvm::MDNode::get(Context, Ops); + llvm::Value *Metadata = llvm::MetadataAsValue::get(Context, RegName); + + llvm::Type *RegisterType = Int64Ty; + llvm::Type *ValueType = Int32Ty; + llvm::Type *Types[] = { RegisterType }; + + if (BuiltinID == AArch64::BI_ReadStatusReg) { + llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::read_register, Types); + llvm::Value *Call = Builder.CreateCall(F, Metadata); + + return Builder.CreateTrunc(Call, ValueType); + } + + llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::write_register, Types); + llvm::Value *ArgValue = EmitScalarExpr(E->getArg(1)); + ArgValue = Builder.CreateZExt(ArgValue, RegisterType); + + return Builder.CreateCall(F, { Metadata, ArgValue }); + } + // Find out if any arguments are required to be integer constant // expressions. unsigned ICEArguments = 0; |
