Support HLSL `.sample` operators for MS textures (#4524)

* Add `.sample` operator for MS texture types
* Adding filecheck tests for `.sample`

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/hlsl/texture-sample-operator.slang b/tests/hlsl/texture-sample-operator.slang
new file mode 100644
index 000000000..175470367
--- /dev/null
+++ b/tests/hlsl/texture-sample-operator.slang
@@ -0,0 +1,27 @@
+//TEST:SIMPLE(filecheck=HLSL): -target hlsl -stage vertex
+//TEST:SIMPLE(filecheck=GLSL): -target glsl -stage vertex
+//TEST:SIMPLE(filecheck=METAL): -target metal -stage vertex
+//TEST:SIMPLE(filecheck=SPIRV): -target spirv -stage vertex
+//TEST:SIMPLE(filecheck=SPIRV): -target spirv-asm -stage vertex
+
+Texture2DMS <int3> t1;
+Texture2DMSArray <float4> t2;
+
+float4 main()
+{
+    // HLSL: .sample
+    // GLSL: texelFetch
+    // SPIRV: OpImageFetch %v4int {{.*}} Sample {{.*}}
+    // METAL: .read
+    uint2 p1 = uint2(1, 2);
+    int3 a1 = t1.sample[7][p1];
+
+    // HLSL: .sample
+    // GLSL: texelFetch
+    // SPIRV: OpImageFetch %v4float {{.*}} Sample {{.*}}
+    // METAL: .read
+    uint p2 = uint(1);
+    float4 a2 = t2.sample[p2][uint3(1, 2, 3)];
+
+    return float4(float3(a1), 0) + a2;
+}