llvm: implement Stdcall return types

1 files changed, 9 insertions, 6 deletions

diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 178c0aaf0a..6da4e0d9af 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -10412,6 +10412,7 @@ fn firstParamSRet(fn_info: Type.Payload.Function.Data, target: std.Target) bool
             .riscv32, .riscv64 => return riscv_c_abi.classifyType(fn_info.return_type, target) == .memory,
             else => return false, // TODO investigate C ABI for other architectures
         },
+        .Stdcall => return !isScalar(fn_info.return_type),
         else => return false,
     }
 }
@@ -10567,6 +10568,13 @@ fn lowerFnRetTy(dg: *DeclGen, fn_info: Type.Payload.Function.Data) !*llvm.Type {
                 else => return dg.lowerType(fn_info.return_type),
             }
         },
+        .Stdcall => {
+            if (isScalar(fn_info.return_type)) {
+                return dg.lowerType(fn_info.return_type);
+            } else {
+                return dg.context.voidType();
+            }
+        },
         else => return dg.lowerType(fn_info.return_type),
     }
 }
@@ -10802,12 +10810,7 @@ const ParamTypeIterator = struct {
                 it.zig_index += 1;
                 it.llvm_index += 1;
 
-                if (it.target.cpu.arch != .x86 or it.target.os.tag != .windows) {
-                    return .byval;
-                }
-
-                const is_scalar = isScalar(ty);
-                if (is_scalar) {
+                if (isScalar(ty)) {
                     return .byval;
                 } else {
                     it.byval_attr = true;