skia2/resources/sksl/inliner/InlineWithInoutArgument.sksl
John Stiles 74410023ac Add tests for inlining functions with out/inout params.
Functions which don't write to their out params should be safe to
inline, but we currently don't recognize this.

Change-Id: I753e48067c7be4473675ef6c95e61af17dc5ae41
Bug: skia:12636
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/470298
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2021-11-11 18:46:21 +00:00

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905 B
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uniform half4 colorGreen;
inline void outParameterWrite(out half4 x) {
x = colorGreen;
}
inline void inoutParameterWrite(inout half4 x) {
x *= x;
}
inline void inoutParameterRead(inout half4 x) {
half4 scratch = x * x;
}
inline void inoutParameterIgnore(inout half4 x) {
half4 scratch = colorGreen * colorGreen;
}
inline void outParameterIgnore(out half4 x) {
half4 scratch = colorGreen * colorGreen;
}
// We don't inline functions that write to out parameters. (skia:11326)
half4 main(float2 coords) {
half4 c;
// These calls are ineligible for inlining, because they write to their `out` param.
outParameterWrite(c);
inoutParameterWrite(c);
// TODO(skia:12636): These calls are eligible for inlining, because they don't write to their
// `out` param.
inoutParameterRead(c);
inoutParameterIgnore(c);
outParameterIgnore(c);
return c;
}