From c3c1cb6776eacdc01ea5bc197b635471960994e4 Mon Sep 17 00:00:00 2001
From: Jay Kwak <82421531+jkwak-work@users.noreply.github.com>
Date: Thu, 20 Jun 2024 07:32:48 -0700
Subject: Disambiguate int type matrix multiply (#4425)

Closes #4414
---
 source/slang/hlsl.meta.slang |  1 +
 tests/bugs/gh-4414.slang     | 10 ++++++++++
 2 files changed, 11 insertions(+)
 create mode 100644 tests/bugs/gh-4414.slang

diff --git a/source/slang/hlsl.meta.slang b/source/slang/hlsl.meta.slang
index 24bbf1429..c01265369 100644
--- a/source/slang/hlsl.meta.slang
+++ b/source/slang/hlsl.meta.slang
@@ -10877,6 +10877,7 @@ vector<T,N> mul(matrix<T,N,M> left, vector<T,M> right)
 }
 __generic<T : __BuiltinLogicalType, let N : int, let M : int>
 [__readNone]
+[OverloadRank(-1)]
 [require(cpp_cuda_glsl_hlsl_metal_spirv, sm_4_0_version)]
 vector<T,N> mul(matrix<T,N,M> left, vector<T,M> right)
 {
diff --git a/tests/bugs/gh-4414.slang b/tests/bugs/gh-4414.slang
new file mode 100644
index 000000000..99d537089
--- /dev/null
+++ b/tests/bugs/gh-4414.slang
@@ -0,0 +1,10 @@
+//TEST:SIMPLE(filecheck=CHK):-target hlsl -entry main -stage vertex
+
+void main()
+{
+  int2x2 a;
+  int4 b;
+
+  //CHK-NOT:error 39999: ambiguous call
+  b.zw = mul(a, b.yx);
+}
-- 
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