345d72124d
When we determine that a function only contains a single return statement, there is no need to create a temporary variable and store the result expression into a variable. Instead, we can directly replace the function-call expression with the return-statement's expression. This dramatically simplifies the final optimized output from chains of very simple inlined functions, which is a very common pattern for trees of Skia fragment processors. Change-Id: I6789064a321daf43db2e1cef4915f25ed74d6131 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/344665 Commit-Queue: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Auto-Submit: John Stiles <johnstiles@google.com>
20 lines
564 B
Metal
20 lines
564 B
Metal
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct Inputs {
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float4 src;
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float4 dst;
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};
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struct Outputs {
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float4 sk_FragColor [[color(0)]];
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};
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fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
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Outputs _outputStruct;
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thread Outputs* _out = &_outputStruct;
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_out->sk_FragColor = float4((_in.src.xyz + _in.dst.xyz) - 2.0 * min(_in.src.xyz * _in.dst.w, _in.dst.xyz * _in.src.w), _in.src.w + (1.0 - _in.src.w) * _in.dst.w);
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return *_out;
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}
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