[PATCH] D33527: [coroutines] Relocate instructions that maybe spilled after coro.begin

[Gor Nishanov via Phabricator via llvm-commits]

GorNishanov created this revision.
Herald added a subscriber: EricWF.

Frontend generates store instructions after allocas, for example:

  define i8* @f(i64 %this) "coroutine.presplit"="1" personality i32 0 {
  entry:
    %this.addr = alloca i64
    store i64 %this, i64* %this.addr
    ..
    %hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)

Such instructions may require spilling into coro.frame, but, coro-frame address is only available after coro.begin and thus needs to be moved after coro.begin.
The only instructions that should not be moved are the arguments of coro.begin and all of their operands.


https://reviews.llvm.org/D33527

Files:
  lib/Transforms/Coroutines/CoroSplit.cpp
  test/Transforms/Coroutines/coro-frame.ll

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