Heejin Ahn 972fc3588b [WebAssembly] Don't write SP back when prolog is generated only for EH ...

Summary:
When we don't actually have stack-allocated variables but need SP only
to support EH, we don't need to write SP back in the epilog, because we
don't bump down the stack pointer.

Reviewers: dschuff

Subscribers: jgravelle-google, sbc100, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D51114

llvm-svn: 340454

2018-08-22 21:13:49 +00:00

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