New snapshot test for global variables

tests/in/globals.param.ron

@@ -0,0 +1,3 @@
+(
+	spv_version: (1, 0),
+)

tests/in/globals.wgsl

@@ -0,0 +1,9 @@
+// Global variable & constant declarations
+
+let Foo: bool = true;
+
+var<workgroup> wg : array<f32, 10>;
+
+[[stage(compute), workgroup_size(1)]]
+fn main() {
+}

tests/in/interface.wgsl

@@ -1,4 +1,4 @@
-// Testing various parts of the pipeline interface: locations, built-ins, bindings, and entry points
+// Testing various parts of the pipeline interface: locations, built-ins, and entry points
 
 struct VertexOutput {
     [[builtin(position)]] position: vec4<f32>;

tests/in/interpolate.wgsl

@@ -1,3 +1,5 @@
+//TODO: mere with "interface"?
+
 struct FragmentInput {
   [[builtin(position)]] position: vec4<f32>;
   [[location(0), interpolate(flat)]] flat : u32;

tests/out/globals.Compute.glsl

@@ -0,0 +1,11 @@
+#version 310 es
+
+precision highp float;
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+
+void main() {
+    return;
+}
+

tests/out/globals.msl

@@ -0,0 +1,12 @@
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+constexpr constant bool Foo = true;
+struct type2 {
+    float inner[10];
+};
+
+kernel void main1(
+) {
+    return;
+}

tests/out/globals.spvasm

@@ -0,0 +1,26 @@
+; SPIR-V
+; Version: 1.0
+; Generator: rspirv
+; Bound: 15
+OpCapability Shader
+%1 = OpExtInstImport "GLSL.std.450"
+OpMemoryModel Logical GLSL450
+OpEntryPoint GLCompute %12 "main"
+OpExecutionMode %12 LocalSize 1 1 1
+OpDecorate %8 ArrayStride 4
+%2 = OpTypeVoid
+%4 = OpTypeBool
+%3 = OpConstantTrue  %4
+%6 = OpTypeInt 32 1
+%5 = OpConstant  %6  10
+%7 = OpTypeFloat 32
+%8 = OpTypeArray %7 %5
+%10 = OpTypePointer Workgroup %8
+%9 = OpVariable  %10  Workgroup
+%13 = OpTypeFunction %2
+%12 = OpFunction  %2  None %13
+%11 = OpLabel
+OpBranch %14
+%14 = OpLabel
+OpReturn
+OpFunctionEnd

tests/out/globals.wgsl

@@ -0,0 +1,8 @@
+let Foo: bool = true;
+
+var<workgroup> wg: array<f32,10>;
+
+[[stage(compute), workgroup_size(1, 1, 1)]]
+fn main() {
+    return;
+}

tests/snapshots.rs

@@ -293,6 +293,10 @@ fn convert_wgsl() {
         ),
         //TODO: GLSL https://github.com/gfx-rs/naga/issues/874
         ("interface", Targets::SPIRV | Targets::METAL | Targets::WGSL),
+        (
+            "globals",
+            Targets::SPIRV | Targets::METAL | Targets::GLSL | Targets::WGSL,
+        ),
     ];
 
     for &(name, targets) in inputs.iter() {