skia2/tests/sksl/inliner/WhileBodyMustBeInlinedIntoAScope.glsl


out vec4 sk_FragColor;
void main() {
    sk_FragColor = vec4(0.0);
    while (sk_FragColor.x < 0.5) {
        sk_FragColor = sk_FragColor + vec4(0.125);
    }
}
Migrate SkSL inliner tests to golden files. Our lack of proper caps-bits controls in skslc affects the outcome of one test: "InlinerWrapsEarlyReturnsWithDoWhileBlock" does not actually emit the do-while block because the standalone caps bits don't enable do-while support. This will be fixed in a followup CL that adds caps-bit support to our tests. A few tests were renamed for consistency, a few were simplified slightly and one test was removed because it was simply redundant (there was a second test that covered the exact same ground as `ForWithReturnInsideCannotBeInlined`). Change-Id: I2e3b97cb3aea331b6d806bdb865aa78c35c7a6b9 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/316997 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> 2020-09-15 14:10:43 +00:00
Align default values of GrShaderCaps with StandaloneShaderCaps. `fBuiltinFMASupport` is now true on both, and `fUsesPrecisionModifiers` is now false. Other mismatching flags exist, but they are non-trivial to synchronize as they are tied to extension strings. This will help our skslc-based unit tests generate the same results as our C++ unit tests did, but should not affect real-world results as these defaults will all be overwritten in a non-testing scenario. In practice, the `fUsesPrecisionModifiers` change is responsible for all of the diffs below. The other flags did not change the results of any of the currently-ported tests. Change-Id: Ieb056d852b027fa87c56fd89f971a77a10a8a124 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/317204 Commit-Queue: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2020-09-15 20:09:11 +00:00			`out vec4 sk_FragColor;`
Migrate SkSL inliner tests to golden files. Our lack of proper caps-bits controls in skslc affects the outcome of one test: "InlinerWrapsEarlyReturnsWithDoWhileBlock" does not actually emit the do-while block because the standalone caps bits don't enable do-while support. This will be fixed in a followup CL that adds caps-bit support to our tests. A few tests were renamed for consistency, a few were simplified slightly and one test was removed because it was simply redundant (there was a second test that covered the exact same ground as `ForWithReturnInsideCannotBeInlined`). Change-Id: I2e3b97cb3aea331b6d806bdb865aa78c35c7a6b9 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/316997 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> 2020-09-15 14:10:43 +00:00			`void main() {`
			`sk_FragColor = vec4(0.0);`
			`while (sk_FragColor.x < 0.5) {`
Eliminate inliner temporary variables for top-level-exit functions. When we determine that a function only contains a single return statement and it is at the top level (i.e. not inside any scopes), 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. Unlike my previous solution, this does not require variable declarations to be rewritten. The no-scopes limitation makes it slightly less effective in theory, but in practice we still get almost all of the benefit. The no-scope limitation bites us on structures like @if (true) { return x; } else { return y; } Which will optimize away the if, but leave the scope: { return x; } However, this is not a big deal; the biggest wins are single-line helper functions like `guarded_divide` and `unpremul` which retain the full benefit. Change-Id: I7fbb725e65db021b9795c04c816819669815578f Reviewed-on: https://skia-review.googlesource.com/c/skia/+/345167 Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Ethan Nicholas <ethannicholas@google.com> 2020-12-17 19:38:56 +00:00			`sk_FragColor = sk_FragColor + vec4(0.125);`
Migrate SkSL inliner tests to golden files. Our lack of proper caps-bits controls in skslc affects the outcome of one test: "InlinerWrapsEarlyReturnsWithDoWhileBlock" does not actually emit the do-while block because the standalone caps bits don't enable do-while support. This will be fixed in a followup CL that adds caps-bit support to our tests. A few tests were renamed for consistency, a few were simplified slightly and one test was removed because it was simply redundant (there was a second test that covered the exact same ground as `ForWithReturnInsideCannotBeInlined`). Change-Id: I2e3b97cb3aea331b6d806bdb865aa78c35c7a6b9 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/316997 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> 2020-09-15 14:10:43 +00:00			`}`
			`}`