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, 11 insertions, 0 deletions

diff --git a/tests/metal/nested-struct-fragment-input.slang b/tests/metal/nested-struct-fragment-input.slang
index 727b5b1e5..a8c94e888 100644
--- a/tests/metal/nested-struct-fragment-input.slang
+++ b/tests/metal/nested-struct-fragment-input.slang
@@ -1,5 +1,6 @@
 //TEST:SIMPLE(filecheck=METAL): -target metal -stage fragment -entry fragmentMain
 //TEST:SIMPLE(filecheck=METALLIB): -target metallib -stage fragment -entry fragmentMain
+//TEST:SIMPLE(filecheck=WGSL): -target wgsl -stage fragment -entry fragmentMain
 
 // METAL: COARSEVERTEX_7
 // METAL: COARSEVERTEX_6
@@ -63,6 +64,16 @@ float4 fragmentMain(FragmentStageInput input)
     // METAL-DAG: {{.*}}->p3{{.*}}->p2{{.*}}->p1{{.*}}=
     // METAL-DAG: {{.*}}->p3{{.*}}->p3{{.*}}->p1{{.*}}=
 
+    // WGSL-DAG: {{.*}}._S{{.*}}=
+
+    // WGSL-DAG: {{.*}}.p2{{.*}}._S{{.*}}=
+    // WGSL-DAG: {{.*}}.p2{{.*}}.p2{{.*}}._S{{.*}}=
+    // WGSL-DAG: {{.*}}.p2{{.*}}.p3{{.*}}._S{{.*}}=
+
+    // WGSL-DAG: {{.*}}.p3{{.*}}._S{{.*}}=
+    // WGSL-DAG: {{.*}}.p3{{.*}}.p2{{.*}}._S{{.*}}=
+    // WGSL-DAG: {{.*}}.p3{{.*}}.p3{{.*}}._S{{.*}}=
+
     outputBuffer[0] = input.coarseVertex.p1 + input.coarseVertex.p2.p1 + +input.coarseVertex.p3.p1;
     return float4(0, 0, 0, 0);
 }