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>
100 lines
1.2 KiB
GLSL
100 lines
1.2 KiB
GLSL
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out vec4 sk_FragColor;
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in float val;
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uniform int ui;
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uniform vec4 uh4;
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void main() {
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struct S {
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vec4[1] ah4;
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float[1] ah;
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vec4 h4;
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float h;
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} s;
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s.ah4[0] = vec4(val);
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s.ah[0] = val;
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s.h4 = vec4(val);
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s.h = val;
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S as[1];
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as[0].ah4[0] = vec4(val);
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{
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sk_FragColor = sk_FragColor.xxxx;
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}
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{
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sk_FragColor = vec4(s.h);
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}
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{
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sk_FragColor = s.ah4[0].ywyw;
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}
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{
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sk_FragColor = as[0].ah4[0].xyxy;
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}
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{
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sk_FragColor = s.h4.zzzz;
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}
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{
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sk_FragColor = uh4.xyzx;
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}
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{
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sk_FragColor = vec4(s.h);
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}
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{
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sk_FragColor = vec4(s.h);
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}
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{
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sk_FragColor = s.ah4[0].xxxy;
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}
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{
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sk_FragColor = uh4;
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}
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bool _1_b = !true;
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{
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sk_FragColor = _1_b ? sk_FragColor.xxxx : sk_FragColor.yyyy;
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}
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float _2_h = -s.h;
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{
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sk_FragColor = vec4(_2_h);
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}
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vec2 _3_h2 = s.ah4[ui].yw;
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{
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sk_FragColor = _3_h2.xyxy;
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}
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vec3 _4_h3 = s.h4.yyy + s.h4.zzz;
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{
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sk_FragColor = _4_h3.xyzx;
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}
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vec4 _5_h4 = vec3(s.h4.y, 0.0, 1.0).xyyz;
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{
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sk_FragColor = _5_h4;
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}
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}
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