From 7774d5b430c5aca22c8e00a7578702ecfc7b5e2a Mon Sep 17 00:00:00 2001
From: pdeayton-nv <205388607+pdeayton-nv@users.noreply.github.com>
Date: Mon, 6 Oct 2025 04:07:55 -0700
Subject: Prefer IntegerType over LogicalType integer matrix mul() overloads
 (#8426)

Integer mul(matrix, matrix) and mul(vector, matrix) are not
disambiguated between __BuiltinIntegerType and __BuiltinLogicalType,
emitting an ambiguous call compilation error.

Use the OverloadRank attribute to prefer the IntegerType overload over
the LogicalType overload.

Fixes #8424
---
 source/slang/hlsl.meta.slang | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'source')

diff --git a/source/slang/hlsl.meta.slang b/source/slang/hlsl.meta.slang
index 489bcbab6..ff2762b23 100644
--- a/source/slang/hlsl.meta.slang
+++ b/source/slang/hlsl.meta.slang
@@ -12190,6 +12190,7 @@ vector<T, M> mul(vector<T, N> left, matrix<T, N, M> right)
 }
 __generic<T : __BuiltinLogicalType, let N : int, let M : int>
 [__readNone]
+[OverloadRank(-1)]
 [require(cpp_cuda_glsl_hlsl_metal_spirv_wgsl, sm_4_0_version)]
 vector<T, M> mul(vector<T, N> left, matrix<T, N, M> right)
 {
@@ -12353,6 +12354,7 @@ matrix<T,R,C> mul(matrix<T,R,N> left, matrix<T,N,C> right)
 }
 __generic<T : __BuiltinLogicalType, let R : int, let N : int, let C : int>
 [__readNone]
+[OverloadRank(-1)]
 [require(cpp_cuda_glsl_hlsl_metal_spirv_wgsl, sm_4_0_version)]
 matrix<T,R,C> mul(matrix<T,R,N> left, matrix<T,N,C> right)
 {
-- 
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