stage1: Fix emission of sret annotation for LLVM

LLVM12 deprecated `sret` and replaced it with the `sret(<Ty>)` form.

Closes #8075

1 files changed, 11 insertions, 1 deletions

diff --git a/src/zig_llvm.cpp b/src/zig_llvm.cpp
index b4bdf7c033..55e507c6d0 100644
--- a/src/zig_llvm.cpp
+++ b/src/zig_llvm.cpp
@@ -798,7 +798,17 @@ void ZigLLVMAddByValAttr(LLVMValueRef fn_ref, unsigned ArgNo, LLVMTypeRef type_v
     AttrBuilder attr_builder;
     Type *llvm_type = unwrap<Type>(type_val);
     attr_builder.addByValAttr(llvm_type);
-    const AttributeList new_attr_set = attr_set.addAttributes(func->getContext(), ArgNo, attr_builder);
+    const AttributeList new_attr_set = attr_set.addAttributes(func->getContext(), ArgNo + 1, attr_builder);
+    func->setAttributes(new_attr_set);
+}
+
+void ZigLLVMAddSretAttr(LLVMValueRef fn_ref, unsigned ArgNo, LLVMTypeRef type_val) {
+    Function *func = unwrap<Function>(fn_ref);
+    const AttributeList attr_set = func->getAttributes();
+    AttrBuilder attr_builder;
+    Type *llvm_type = unwrap<Type>(type_val);
+    attr_builder.addStructRetAttr(llvm_type);
+    const AttributeList new_attr_set = attr_set.addAttributes(func->getContext(), ArgNo + 1, attr_builder);
     func->setAttributes(new_attr_set);
 }