[WebAssembly] TableGen backend for stackifying instructions
Summary:
The new stackification backend generates the giant switch statement
used to translate instructions to their stackified forms. I did this
because it was more interesting than adding all the different vector
versions of the various SIMD instructions to the switch statment
manually.
Reviewers: aardappel, aheejin, dschuff
Subscribers: mgorny, sbc100, jgravelle-google, sunfish, jfb, llvm-commits
Differential Revision: https://reviews.llvm.org/D51318
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340781
91177308-0d34-0410-b5e6-
96231b3b80d8
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