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a89ff5981b
Add additional nodes to capture places where control flow is changed (if, switch, for, short-circuiting op, function call), and use these to show the actual point at which control flow became non-uniform as a result of a non-uniform value. Do this recursively, to capture cases where control flow becomes non-uniform after a function call statement. Bug: tint:880 Change-Id: Ied92d690f98a5c11a1892eef500a50d0f123943d Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/89862 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
38 lines
1.4 KiB
WebGPU Shading Language
38 lines
1.4 KiB
WebGPU Shading Language
bug/fxc/gradient_in_varying_loop/1112.wgsl:23:33 warning: 'textureSample' must only be called from uniform control flow
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let sampleDepth : f32 = textureSample(depthTexture, Sampler, offset.xy).r;
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^^^^^^^^^^^^^
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bug/fxc/gradient_in_varying_loop/1112.wgsl:18:28 note: control flow depends on non-uniform value
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if (offset.x < 0.0 || offset.y < 0.0 || offset.x > 1.0 || offset.y > 1.0) {
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^^
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bug/fxc/gradient_in_varying_loop/1112.wgsl:8:29 note: return value of 'textureSample' may be non-uniform
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let random: vec3<f32> = textureSample(randomTexture, Sampler, vUV).rgb;
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^^^^^^^^^^^^^
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@group(0) @binding(0) var Sampler : sampler;
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@group(0) @binding(1) var randomTexture : texture_2d<f32>;
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@group(0) @binding(2) var depthTexture : texture_2d<f32>;
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@stage(fragment)
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fn main(@location(0) vUV : vec2<f32>) -> @location(0) vec4<f32> {
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let random : vec3<f32> = textureSample(randomTexture, Sampler, vUV).rgb;
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var i = 0;
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loop {
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if ((i < 1)) {
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} else {
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break;
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}
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let offset : vec3<f32> = vec3<f32>(random.x);
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if (((((offset.x < 0.0) || (offset.y < 0.0)) || (offset.x > 1.0)) || (offset.y > 1.0))) {
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i = (i + 1);
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continue;
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}
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let sampleDepth : f32 = textureSample(depthTexture, Sampler, offset.xy).r;
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i = (i + 1);
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}
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return vec4<f32>(1.0);
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}
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