f4103618ff
GLSL ES2 behavior is explicitly undefined if an out-param is never written to: "If a function does not write to an out parameter, the value of the actual parameter is undefined when the function returns." We do see divergence here in practice: SkVM's behavior (the parameter is left alone) differs from my GPU's behavior (the parameter is zeroed out). SkSL will now report an error if an out parameter is never assigned-to. There is no control flow analysis performed, so we will not report cases where the out parameter is assigned-to on some paths but not others. (Technically the return-on-all-paths logic could be adapted for this, but it would be a fair amount of work.) Structs are currently exempt from the rule because custom mesh specifications require an `out` parameter for a Varyings struct, even if your mesh program doesn't need Varyings. Bug: skia:12867 Change-Id: Ie828d3ce91c2c67e008ae304fdb163ffa88d744c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/500440 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Brian Osman <brianosman@google.com> |
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| .. | ||
| blend | ||
| errors | ||
| es2_conformance | ||
| folding | ||
| glsl | ||
| inliner | ||
| intrinsics | ||
| metal | ||
| runtime | ||
| runtime_errors | ||
| shared | ||
| spirv | ||
| workarounds | ||
| README.txt | ||
| update_fuzzer.py | ||
This directory contains source files for testing skslc compilation. The compiled output files are in the /tests/sksl/ directory.