[WebAssembly] Add extended-const to the "generic" CPU. #139640
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From the emscripten POV we would want to add a binaryen lowering pass before landing this if possible: WebAssembly/binaryen#7583 |
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This enables -mextended-const in the default "generic" CPU for WebAssembly. extended-const is implemented in the latest versions of all the major browsers, though we should investigate what percentage of each browsers' users have updated to a version that has -mextended-const.
@sbc100 @dschuff