Varying inputs and outputs for wgsl (#5669)

Closes https://github.com/shader-slang/slang/issues/5067

New tests, covering what's declared supported in the WGSL support docs

- tests/wgsl/semantic-coverage.slang
- tests/wgsl/semantic-depth.slang
- tests/wgsl/semantic-dispatch-thread-id.slang
- tests/wgsl/semantic-group-id.slang
- tests/wgsl/semantic-group-index.slang
- tests/wgsl/semantic-group-thread-id.slang
- tests/wgsl/semantic-instance-id.slang
- tests/wgsl/semantic-is-front-face.slang
- tests/wgsl/semantic-position.slang
- tests/wgsl/semantic-sample-index.slang
- tests/wgsl/semantic-vertex-id.slang

WGSL enabled existing tests:
- tests/compute/compile-time-loop.slang
- tests/compute/constexpr.slang
- tests/compute/discard-stmt.slang
- tests/metal/nested-struct-fragment-input.slang
- tests/metal/nested-struct-fragment-output.slang
- tests/metal/nested-struct-multi-entry-point-vertex.slang
- tests/metal/no-struct-vertex-output.slang
- tests/metal/sv_target-complex-1.slang
- tests/metal/sv_target-complex-2.slang
- tests/bugs/texture2d-gather.hlsl
- tests/render/cross-compile-entry-point.slang
- tests/render/nointerpolation.hlsl
- tests/render/render0.hlsl
- tests/render/cross-compile0.hlsl
- tests/render/imported-parameters.hlsl
- tests/render/unused-discard.hlsl

Can't be enabled due to missing wgsl features

- tests/compute/texture-sampling.slang

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/tests/metal/nested-struct-multi-entry-point-vertex.slang b/tests/metal/nested-struct-multi-entry-point-vertex.slang
index 779b66704..5d2b3b1e0 100644
--- a/tests/metal/nested-struct-multi-entry-point-vertex.slang
+++ b/tests/metal/nested-struct-multi-entry-point-vertex.slang
@@ -2,17 +2,29 @@
 //TEST:SIMPLE(filecheck=METALLIB1): -target metallib -stage vertex -entry vertexMain1
 //TEST:SIMPLE(filecheck=METAL2): -target metal -stage vertex -entry vertexMain2
 //TEST:SIMPLE(filecheck=METALLIB2): -target metallib -stage vertex -entry vertexMain2
+//TEST:SIMPLE(filecheck=WGSL1): -target wgsl -stage vertex -entry vertexMain1
+//TEST:SIMPLE(filecheck=WGSL2): -target wgsl -stage vertex -entry vertexMain2
 
 //METALLIB1: @vertexMain1
 //METAL1-DAG: attribute(0)
 //METAL1-DAG: attribute(1)
 //METAL1-NOT: attribute(2)
 
+//WGSL1-DAG: fn vertexMain1
+//WGSL1-DAG: location(0)
+//WGSL1-DAG: location(1)
+//WGSL1-NOT: location(2)
+
 //METALLIB2: @vertexMain2
 //METAL2-DAG: attribute(0)
 //METAL2-DAG: attribute(1)
 //METAL2-DAG: attribute(2)
 
+//WGSL2-DAG: fn vertexMain2
+//WGSL2-DAG: location(0)
+//WGSL2-DAG: location(1)
+//WGSL2-DAG: location(2)
+
 struct SharedStruct
 {
     float4 position;
@@ -42,4 +54,4 @@ struct VertexStageInput2
 float4 vertexMain2(VertexStageInput2 vertex)
 {
 	return vertex.assembledVertex.sharedData.position;
-}
\ No newline at end of file
+}