[PATCH] D51114: [WebAssembly] Don't write SP back when prolog is generated only for EH

[Heejin Ahn via Phabricator via llvm-commits]

aheejin added inline comments.


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Comment at: lib/Target/WebAssembly/WebAssemblyEHRestoreStackPointer.cpp:75
+    // function uses the red zone, but that only happens with leaf functions,
+    // and leaf functions can't catch exceptions anyway.
     auto InsertPos = MBB.begin();
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dschuff wrote:
> can't leaf functions have try/catch blocks, even if there are no calls? I think the real issue is that leaf functions do not to restore the stack pointer on catch, because it won't have been updated by any callees.
Right, good point.


Repository:
  rL LLVM

https://reviews.llvm.org/D51114