Dan Gohman b7c2400fa7 [WebAssembly] Optimize away return instructions using fallthroughs. ...

This saves a small amount of code size, and is a first small step toward
passing values on the stack across block boundaries.

Differential Review: http://reviews.llvm.org/D20450

llvm-svn: 270294

2016-05-21 00:21:56 +00:00

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