glsl-in: Add test for nested depth texture calls

Co-authored-by: Jasper St. Pierre <jstpierre@mecheye.net>

tests/in/glsl/sampler-functions.frag

@@ -0,0 +1,16 @@
+#version 440
+precision mediump float;
+
+float CalcShadowPCF1(texture2D T_P_t_TextureDepth, samplerShadow S_P_t_TextureDepth, in vec3 t_ProjCoord) {
+    float t_Res = 0.0f;
+    t_Res += texture(sampler2DShadow(T_P_t_TextureDepth, S_P_t_TextureDepth), t_ProjCoord.xyz) * (1.0 / 5.0);
+    return t_Res;
+}
+
+float CalcShadowPCF(texture2D T_P_t_TextureDepth, samplerShadow S_P_t_TextureDepth, in vec3 t_ProjCoord, in float t_Bias) {
+    t_ProjCoord.z += t_Bias;
+    return CalcShadowPCF1(T_P_t_TextureDepth, S_P_t_TextureDepth, t_ProjCoord.xyz);
+}
+
+void main() {
+}

tests/out/wgsl/sampler-functions-frag.wgsl

@@ -0,0 +1,41 @@
+fn CalcShadowPCF1_(T_P_t_TextureDepth: texture_depth_2d, S_P_t_TextureDepth: sampler_comparison, t_ProjCoord: vec3<f32>) -> f32 {
+    var t_ProjCoord_1: vec3<f32>;
+    var t_Res: f32 = 0.0;
+
+    t_ProjCoord_1 = t_ProjCoord;
+    let _e6 = t_Res;
+    let _e7 = t_ProjCoord_1;
+    _ = _e7.xyz;
+    let _e9 = t_ProjCoord_1;
+    let _e10 = _e9.xyz;
+    let _e13 = textureSampleCompare(T_P_t_TextureDepth, S_P_t_TextureDepth, _e10.xy, _e10.z);
+    t_Res = (_e6 + (_e13 * (1.0 / 5.0)));
+    let _e19 = t_Res;
+    return _e19;
+}
+
+fn CalcShadowPCF(T_P_t_TextureDepth_1: texture_depth_2d, S_P_t_TextureDepth_1: sampler_comparison, t_ProjCoord_2: vec3<f32>, t_Bias: f32) -> f32 {
+    var t_ProjCoord_3: vec3<f32>;
+    var t_Bias_1: f32;
+
+    t_ProjCoord_3 = t_ProjCoord_2;
+    t_Bias_1 = t_Bias;
+    let _e7 = t_ProjCoord_3;
+    let _e9 = t_Bias_1;
+    t_ProjCoord_3.z = (_e7.z + _e9);
+    let _e11 = t_ProjCoord_3;
+    _ = _e11.xyz;
+    let _e13 = t_ProjCoord_3;
+    let _e15 = CalcShadowPCF1_(T_P_t_TextureDepth_1, S_P_t_TextureDepth_1, _e13.xyz);
+    return _e15;
+}
+
+fn main_1() {
+    return;
+}
+
+@fragment 
+fn main() {
+    main_1();
+    return;
+}