1layout(key) in half one; // always equals 1.0 2layout(key, when=one != 1.0f) in half unused; // never used 3layout(key) float alsoUnused = one + one; // also never used 4 5half4 main() { 6 half4 color = half4(0); 7 8 // Basic if statement. (00 == 00: true --> color=0001) 9 if (color.rg == color.ba) color.a = one; 10 11 // Basic if statement with Block. (00 == 01: false) 12 if (color.rg == color.ba) { 13 color.r = color.a; 14 } 15 16 // TODO(skia:11872): Add test for If statement with comma-expression statement instead of Block. 17 18 // Basic if-else statement. (0 == 0: true --> color=1011) 19 if (color.r == color.g) color = color.araa; else color = color.rrra; 20 21 // Chained if-else statements. 22 if (color.r + color.g + color.b + color.a == one) { // (3 == 1: false) 23 color = half4(-1); 24 } else if (color.r + color.g + color.b + color.a == 2) { // (3 == 2: false) 25 color = half4(-2); 26 } else { 27 color = color.ggaa; // (color=0011) 28 } 29 30 // Nested if-else statements. 31 if (color.r == one) { // (0 == 1: false) 32 if (color.r == 2) { 33 color = color.rrrr; 34 } else { 35 color = color.gggg; 36 } 37 } else { 38 if (color.b * color.a == one) { // (1*1 == 1: true) 39 color = color.rbga; // (color = 0101) 40 } else { 41 color = color.aaaa; 42 } 43 } 44 45 @if (one != 1.0) { 46 color.r = 1; 47 } 48 49 return color; 50} 51