108bbe2522
The optimizer can now turn the expression `half4(1).xyz` into
`half3(1)`, or `half4(1).w` into `1`. This is actually a somewhat common
case when inlining chains of fragment processors, as inputs are often
overridden to `half4(1)` or `half4(0)`. This optimization also applies
to more complex cases, e.g.:
`half2(anyFunc(sqrt(2))).yxyx` --> `half4(anyFunc(sqrt(2)))`
Since the interior of the constructor is always evaluated once in either
case, it does not actually matter what the constructor contains.
Change-Id: I8d5f358502eaa8e35d4968e74fbd6b0ce2ab6365
Bug: skia:10954
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/335818
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
99 lines
1.1 KiB
GLSL
99 lines
1.1 KiB
GLSL
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out vec4 sk_FragColor;
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void main() {
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vec3 h3;
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{
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h3 = vec3(3.0);
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}
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vec4 h4;
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{
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h4 = vec4(4.0);
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}
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{
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h3.xz = vec2(2.0);
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}
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{
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h4.zwxy = vec4(4.0);
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}
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sk_FragColor = vec4(1.0, 2.0, h3.x, h4.x);
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mat3 h3x3;
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{
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h3x3 = mat3(3.0);
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}
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mat4 h4x4;
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{
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h4x4 = mat4(4.0);
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}
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{
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h3x3[1] = vec3(3.0);
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}
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{
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h4x4[3].w = 1.0;
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}
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sk_FragColor = vec4(mat2(2.0)[0][0], h3x3[0][0], h4x4[0][0], 1.0);
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ivec4 i4;
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{
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i4 = ivec4(4);
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}
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{
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i4.xyz = ivec3(3);
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}
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sk_FragColor = vec4(1.0, 2.0, 3.0, float(i4.x));
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vec3 f3;
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{
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f3 = vec3(3.0);
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}
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{
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f3.xy = vec2(2.0);
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}
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sk_FragColor = vec4(1.0, 2.0, f3.x, 4.0);
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mat2 f2x2;
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{
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f2x2 = mat2(2.0);
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}
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{
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f2x2[0][0] = 1.0;
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}
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sk_FragColor = vec4(f2x2[0][0], mat3(3.0)[0][0], mat4(4.0)[0][0], 1.0);
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bvec4 b4;
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{
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b4 = bvec4(false);
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}
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{
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b4.xw = bvec2(false);
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}
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sk_FragColor = vec4(1.0, false ? 1.0 : 0.0, true ? 1.0 : 0.0, b4.x ? 1.0 : 0.0);
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}
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