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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>
56 lines
1.3 KiB
Plaintext
56 lines
1.3 KiB
Plaintext
#include <metal_stdlib>
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using namespace metal;
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struct Interface {
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int i;
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uint u;
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int4 vi;
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uint4 vu;
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float4 pos;
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};
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struct tint_symbol {
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int i [[user(locn0)]];
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uint u [[user(locn1)]];
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int4 vi [[user(locn2)]];
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uint4 vu [[user(locn3)]];
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float4 pos [[position]];
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};
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struct tint_symbol_2 {
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int i [[user(locn0)]];
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uint u [[user(locn1)]];
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int4 vi [[user(locn2)]];
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uint4 vu [[user(locn3)]];
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};
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struct tint_symbol_3 {
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int value [[color(0)]];
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};
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Interface vert_main_inner() {
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Interface const tint_symbol_4 = {};
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return tint_symbol_4;
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}
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vertex tint_symbol vert_main() {
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Interface const inner_result = vert_main_inner();
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tint_symbol wrapper_result = {};
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wrapper_result.i = inner_result.i;
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wrapper_result.u = inner_result.u;
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wrapper_result.vi = inner_result.vi;
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wrapper_result.vu = inner_result.vu;
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wrapper_result.pos = inner_result.pos;
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return wrapper_result;
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}
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int frag_main_inner(Interface inputs) {
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return inputs.i;
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}
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fragment tint_symbol_3 frag_main(float4 pos [[position]], tint_symbol_2 tint_symbol_1 [[stage_in]]) {
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Interface const tint_symbol_5 = {.i=tint_symbol_1.i, .u=tint_symbol_1.u, .vi=tint_symbol_1.vi, .vu=tint_symbol_1.vu, .pos=pos};
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int const inner_result_1 = frag_main_inner(tint_symbol_5);
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tint_symbol_3 wrapper_result_1 = {};
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wrapper_result_1.value = inner_result_1;
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return wrapper_result_1;
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}
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