glsl-in: Add test for conditional builtin inject

tests/in/variations.glsl

@@ -0,0 +1,9 @@
+#version 460 core
+
+layout(set = 0, binding = 0) uniform textureCube texCube;
+layout(set = 0, binding = 1) uniform sampler samp;
+
+void main() {
+    ivec2 sizeCube = textureSize(samplerCube(texCube, samp), 0);
+    float a = ceil(1.0);
+}

tests/out/glsl/variations-glsl.main.Fragment.glsl

@@ -0,0 +1,21 @@
+#version 310 es
+
+precision highp float;
+precision highp int;
+
+uniform highp samplerCube _group_0_binding_0_fs;
+
+
+void main_1() {
+    ivec2 sizeCube = ivec2(0);
+    float a = 0.0;
+    sizeCube = textureSize(_group_0_binding_0_fs, 0).xy;
+    a = ceil(1.0);
+    return;
+}
+
+void main() {
+    main_1();
+    return;
+}
+

tests/snapshots.rs

@@ -556,6 +556,25 @@ fn convert_spv_all() {
     convert_spv("degrees", false, Targets::empty());
 }
 
+#[cfg(feature = "glsl-in")]
+#[test]
+fn convert_glsl_variations_check() {
+    let root = env!("CARGO_MANIFEST_DIR");
+    let file = fs::read_to_string(format!("{}/{}/variations.glsl", root, BASE_DIR_IN))
+        .expect("Couldn't find glsl file");
+    let mut parser = naga::front::glsl::Parser::default();
+    let module = parser
+        .parse(
+            &naga::front::glsl::Options {
+                stage: naga::ShaderStage::Fragment,
+                defines: Default::default(),
+            },
+            &file,
+        )
+        .unwrap();
+    check_targets(&module, "variations-glsl", Targets::GLSL);
+}
+
 #[cfg(feature = "glsl-in")]
 #[allow(unused_variables)]
 #[test]