Disable binaryen trap test on Wasm backend #5877
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After llvm-mirror/llvm@9f86840#diff-15ffc2fb5830c3a8c3c4c354857b1631, LLVM has two behaviors: When executing llc with `-mattr=+nontrapping-fptoint`: It generates nontrapping version of instructions, those with :sat varient. When executing llc with `-mattr=-nontrapping-fptoint`: It generates trapping version of instructions, but it inserts conditional checks around them so they don't trap and clamp to the predefined value. So it seems not very possible to support this trapping test including three modes (allow, trap, and js) for wasm backend now. Related: WebAssembly/binaryen/emscripten-core#1168, emscripten-core#5863
kripken
approved these changes
Nov 30, 2017
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Thank you. Could someone merge this? I don't have the access. |
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Yeah, I'll land it when the CI passes - very low risk of failures, but just in case (sorry, CI here is slow, might be tomorrow). |
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Oh I see. Thank you! |
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After llvm-mirror/llvm@9f86840, LLVM wass backend has two behaviors:
When executing llc with
-mattr=+nontrapping-fptoint:It generates nontrapping version of instructions, those with :sat
varient.
When executing llc with
-mattr=-nontrapping-fptoint:It generates trapping version of instructions, but it inserts
conditional checks around them so they don't trap and clamp to the
predefined value.
So it seems not very possible to support this trapping test including
three modes (allow, trap, and js) for wasm backend now.
Related: WebAssembly/binaryen#1168, #5863