From a9ae4fb5989aec75a055d315eaf3b01cbf6f255c Mon Sep 17 00:00:00 2001
From: gingerBill <gingerBill@users.noreply.github.com>
Date: Wed, 8 Apr 2026 12:58:19 +0100
Subject: [PATCH] Macro out the ABI stuff

---
 src/llvm_abi.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/llvm_abi.cpp b/src/llvm_abi.cpp
index 2e1e505f2..d4dde2a3d 100644
--- a/src/llvm_abi.cpp
+++ b/src/llvm_abi.cpp
@@ -1,4 +1,5 @@
 #define ALLOW_SPLIT_MULTI_RETURNS true
+#define ALLOW_WIN64_VECTORCALL_ABI true
 
 enum lbArgKind {
 	lbArg_Direct,
@@ -142,7 +143,9 @@ gb_internal void lb_add_function_calling_convention(LLVMValueRef fn, ProcCalling
 		switch (calling_convention) {
 		case ProcCC_Odin:
 		case ProcCC_Contextless:
-		    	cc_kind = lbCallingConvention_X86_VectorCall;
+			if (ALLOW_WIN64_VECTORCALL_ABI) {
+			    	cc_kind = lbCallingConvention_X86_VectorCall;
+			}
 		    	break;
 		}
 	}
@@ -486,7 +489,7 @@ namespace lbAbiAmd64Win64 {
 		switch (calling_convention) {
 		case ProcCC_Odin:
 		case ProcCC_Contextless:
-			return true;
+			return ALLOW_WIN64_VECTORCALL_ABI;
 		case ProcCC_VectorCall:
 			return true;
 		}