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a5d73ce965
This is a major reworking of this transform. The old transform code was getting unwieldy, with part of the complication coming from the handling of multiple return statements. By generating a wrapper function instead, we can avoid a lot of this complexity. The original entry point function is stripped of all shader IO attributes (as well as `stage` and `workgroup_size`), but the body is left unmodified. A new entry point wrapper function is introduced which calls the original function, packing/unpacking the shader inputs as necessary, and propagates the result to the corresponding shader outputs. The new code has been refactored to use a state object with the different parts of the transform split into separate functions, which makes it much more manageable. Fixed: tint:1076 Bug: tint:920 Change-Id: I3490a0ea7a3509a4e198ce730e476516649d8d96 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60521 Auto-Submit: James Price <jrprice@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: James Price <jrprice@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
24 lines
472 B
Plaintext
24 lines
472 B
Plaintext
#include <metal_stdlib>
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using namespace metal;
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struct S {
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/* 0x0000 */ packed_float3 v;
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/* 0x000c */ uint i;
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};
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float3 Bad(uint index, float3 rd) {
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float3 normal = float3(0.0f);
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normal[index] = -(sign(rd[index]));
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return normalize(normal);
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}
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void tint_symbol_inner(device S& io, uint idx) {
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io.v = Bad(io.i, io.v);
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}
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kernel void tint_symbol(uint idx [[thread_index_in_threadgroup]], device S& io [[buffer(0)]]) {
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tint_symbol_inner(io, idx);
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return;
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}
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