[Webkit-unassigned] [Bug 214948] REGRESSION: [ ios14 ] webgl/1.0.3/conformance/glsl/functions/glsl-function-sign.html and webgl/1.0.3/conformance/glsl/misc/glsl-function-nodes.html are failing consistently.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214948

--- Comment #14 from Kenneth Russell <kbr at google.com> ---
I wonder whether ANGLE's internal shader compiler instance might not be enabling some of the driver bug workarounds that used to be enabled by WebKit's manually constructed instance. Perhaps check the options that were previously being passed into sh::Compile in the ANGLEWebKitBridge, and see if any are missing inside ANGLE when it constructs its compiler instance? See Source/ThirdParty/ANGLE/include/GLSLANG/ShaderLang.h , and for example SH_REWRITE_FLOAT_UNARY_MINUS_OPERATOR.

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