amd/common: add ac_is_sgpr_param helper

Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/amd/common/ac_llvm_helper.cpp

@@ -35,6 +35,7 @@
 #include <llvm-c/Core.h>
 #include <llvm/Target/TargetOptions.h>
 #include <llvm/ExecutionEngine/ExecutionEngine.h>
+#include <llvm/IR/Attributes.h>
 
 void ac_add_attr_dereferenceable(LLVMValueRef val, uint64_t bytes)
 {
@@ -43,3 +44,12 @@ void ac_add_attr_dereferenceable(LLVMValueRef val, uint64_t bytes)
    B.addDereferenceableAttr(bytes);
    A->addAttr(llvm::AttributeSet::get(A->getContext(), A->getArgNo() + 1,  B));
 }
+
+bool ac_is_sgpr_param(LLVMValueRef arg)
+{
+	llvm::Argument *A = llvm::unwrap<llvm::Argument>(arg);
+	llvm::AttributeSet AS = A->getParent()->getAttributes();
+	unsigned ArgNo = A->getArgNo();
+	return AS.hasAttribute(ArgNo + 1, llvm::Attribute::ByVal) ||
+	       AS.hasAttribute(ArgNo + 1, llvm::Attribute::InReg);
+}

src/amd/common/ac_llvm_util.h

@@ -24,6 +24,7 @@
  */
 #pragma once
 
+#include <stdbool.h>
 #include <llvm-c/TargetMachine.h>
 
 #include "amd_family.h"
@@ -35,6 +36,7 @@ extern "C" {
 LLVMTargetMachineRef ac_create_target_machine(enum radeon_family family);
 
 void ac_add_attr_dereferenceable(LLVMValueRef val, uint64_t bytes);
+bool ac_is_sgpr_param(LLVMValueRef param);
 
 #ifdef __cplusplus
 }