Add entry point to operators wgsl test

tests/in/operators.wgsl

@@ -8,3 +8,9 @@ fn unary() -> i32 {
     let a = 1;
     if (!true) { return a; } else { return ~a; };
 }
+
+[[stage(compute), workgroup_size(1)]]
+fn main() {
+    let a = splat();
+    let b = unary();
+}

tests/out/glsl/operators.main.Compute.glsl

@@ -0,0 +1,27 @@
+#version 310 es
+
+precision highp float;
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+
+vec4 splat() {
+    vec2 a = (((vec2(1.0) + vec2(2.0)) - vec2(3.0)) / vec2(4.0));
+    ivec4 b = (ivec4(5) % ivec4(2));
+    return (a.xyxy + vec4(b));
+}
+
+int unary() {
+    if ((! true)) {
+        return 1;
+    } else {
+        return (~ 1);
+    }
+}
+
+void main() {
+    vec4 _expr0 = splat();
+    int _expr1 = unary();
+    return;
+}
+

tests/out/msl/operators.msl

@@ -17,3 +17,10 @@ int unary(
         return !1;
     }
 }
+
+kernel void main1(
+) {
+    metal::float4 _e0 = splat();
+    int _e1 = unary();
+    return;
+}

tests/out/spv/operators.spvasm

@@ -1,11 +1,12 @@
 ; SPIR-V
 ; Version: 1.0
 ; Generator: rspirv
-; Bound: 44
+; Bound: 50
 OpCapability Shader
-OpCapability Linkage
 %1 = OpExtInstImport "GLSL.std.450"
 OpMemoryModel Logical GLSL450
+OpEntryPoint GLCompute %45 "main"
+OpExecutionMode %45 LocalSize 1 1 1
 %2 = OpTypeVoid
 %4 = OpTypeFloat 32
 %3 = OpConstant  %4  1.0
@@ -24,6 +25,7 @@ OpMemoryModel Logical GLSL450
 %27 = OpTypeVector %9 4
 %36 = OpTypeFunction %9
 %43 = OpConstantNull  %9
+%46 = OpTypeFunction %2
 %16 = OpFunction  %14  None %17
 %15 = OpLabel
 OpBranch %18
@@ -57,4 +59,12 @@ OpReturnValue %11
 OpReturnValue %42
 %39 = OpLabel
 OpReturnValue %43
+OpFunctionEnd
+%45 = OpFunction  %2  None %46
+%44 = OpLabel
+OpBranch %47
+%47 = OpLabel
+%48 = OpFunctionCall  %14  %16
+%49 = OpFunctionCall  %9  %35
+OpReturn
 OpFunctionEnd

tests/out/wgsl/operators.wgsl

@@ -12,3 +12,9 @@ fn unary() -> i32 {
     }
 }
 
+[[stage(compute), workgroup_size(1, 1, 1)]]
+fn main() {
+    let _e0: vec4<f32> = splat();
+    let _e1: i32 = unary();
+    return;
+}