skia2/tests/sksl/errors/Ossfuzz27663.glsl

### Compilation failed:

error: 1: division by zero
error: 1: type mismatch: '=' cannot operate on 'half4', 'float4'
2 errors
Fix double-negation of constant-value construcors. Previously, the code which calculated Constructor constant values assumed that a constant-value PrefixExpression would always have an operand of Constructor. It turns out that another valid case is multiple PrefixExpressions nested within each other (representing repeated negation). Updated the code to work regardless of the type of the prefix operand. Change-Id: Ic9bf54725ae59330ac817bc4ec7a64def384ab54 Bug: oss-fuzz:27663 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337177 Auto-Submit: John Stiles <johnstiles@google.com> Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Osman <brianosman@google.com> 2020-11-20 18:27:04 +00:00			`### Compilation failed:`

Convert IRGenerator::convertPrefixExpr to PrefixExpression::Make. Surprisingly, this actually improved our error detection slightly. The expression `- -half4(0)` can now be simplified to `half4(0)` at IR generation time, which allows the constant-folder to detect a constant zero (and from there, a division by constant zero). Change-Id: I8c4f6ab522efab5bf98913f9c6a1487b7af39a99 Bug: skia:11342, skia:11343 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/376842 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> 2021-02-26 20:29:33 +00:00			`error: 1: division by zero`
Fix double-negation of constant-value construcors. Previously, the code which calculated Constructor constant values assumed that a constant-value PrefixExpression would always have an operand of Constructor. It turns out that another valid case is multiple PrefixExpressions nested within each other (representing repeated negation). Updated the code to work regardless of the type of the prefix operand. Change-Id: Ic9bf54725ae59330ac817bc4ec7a64def384ab54 Bug: oss-fuzz:27663 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337177 Auto-Submit: John Stiles <johnstiles@google.com> Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Osman <brianosman@google.com> 2020-11-20 18:27:04 +00:00			`error: 1: type mismatch: '=' cannot operate on 'half4', 'float4'`
Convert IRGenerator::convertPrefixExpr to PrefixExpression::Make. Surprisingly, this actually improved our error detection slightly. The expression `- -half4(0)` can now be simplified to `half4(0)` at IR generation time, which allows the constant-folder to detect a constant zero (and from there, a division by constant zero). Change-Id: I8c4f6ab522efab5bf98913f9c6a1487b7af39a99 Bug: skia:11342, skia:11343 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/376842 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> 2021-02-26 20:29:33 +00:00			`2 errors`