radeonsi/ac: move vertex export remove to common code.

This code can be shared by radv, we bump the max to
VARYING_SLOT_MAX here, but that shouldn't have too
much fallout.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/amd/common/ac_llvm_helper.cpp

@@ -61,3 +61,21 @@ bool ac_is_sgpr_param(LLVMValueRef arg)
 	return AS.hasAttribute(ArgNo + 1, llvm::Attribute::ByVal) ||
 	       AS.hasAttribute(ArgNo + 1, llvm::Attribute::InReg);
 }
+
+LLVMValueRef ac_llvm_get_called_value(LLVMValueRef call)
+{
+#if HAVE_LLVM >= 0x0309
+	return LLVMGetCalledValue(call);
+#else
+	return llvm::wrap(llvm::CallSite(llvm::unwrap<llvm::Instruction>(call)).getCalledValue());
+#endif
+}
+
+bool ac_llvm_is_function(LLVMValueRef v)
+{
+#if HAVE_LLVM >= 0x0309
+	return LLVMGetValueKind(v) == LLVMFunctionValueKind;
+#else
+	return llvm::isa<llvm::Function>(llvm::unwrap(v));
+#endif
+}