================
@@ -4782,6 +4857,34 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl
GD, unsigned BuiltinID,
Function *F = CGM.getIntrinsic(Intrinsic::frameaddress, AllocaInt8PtrTy);
return RValue::get(Builder.CreateCall(F, Depth));
}
+ case Builtin::BI__builtin_stack_address: {
+ switch (getTarget().getTriple().getArch()) {
+ case Triple::x86:
+ return RValue::get(EmitSpecialRegisterBuiltin(
+ *this, E, Int32Ty, VoidPtrTy, NormalRead, "esp"));
+ case Triple::x86_64:
+ return RValue::get(EmitSpecialRegisterBuiltin(
+ *this, E, Int64Ty, VoidPtrTy, NormalRead, "rsp"));
+ case Triple::arm:
+ case Triple::armeb:
+ case Triple::thumb:
+ case Triple::thumbeb:
+ case Triple::aarch64:
+ case Triple::aarch64_be:
+ case Triple::aarch64_32:
+ case Triple::riscv32:
+ case Triple::riscv64: {
+ llvm::IntegerType *SPRegIntTy =
+ getTarget().getTriple().getArchPointerBitWidth() == 64 ? Int64Ty
+ : Int32Ty;
+ return RValue::get(EmitSpecialRegisterBuiltin(
+ *this, E, SPRegIntTy, VoidPtrTy, NormalRead, "sp"));
+ }
+ default:
+ ErrorUnsupported(E, "__builtin_stack_address");
----------------
AaronBallman wrote:
We're missing test coverage for unsupported architectures; this seems like
something that should be rejected before CodeGen too (in SemaChecking.cpp)
https://github.com/llvm/llvm-project/pull/121332
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