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Gor Nishanov 9c7e9d2676 [coroutines] Handle unwind edge splitting

Summary:
RewritePHIs algorithm used in building of CoroFrame inserts a placeholder
```
%placeholder = phi [%val]
```
on every edge leading to a block starting with PHI node with multiple incoming edges,
so that if one of the incoming values was spilled and need to be reloaded, we have a
place to insert a reload. We use SplitEdge helper function to split the incoming edge.

SplitEdge function does not deal with unwind edges comping into a block with an EHPad.

This patch adds an ehAwareSplitEdge function that can correctly split the unwind edge.

For landing pads, we clone the landing pad into every edge block and replace the original
landing pad with a PHI collection the values from all incoming landing pads.

For WinEH pads, we keep the original EHPad in place and insert cleanuppad/cleapret in the
edge blocks.

Reviewers: majnemer, rnk

Reviewed By: majnemer

Subscribers: EricWF, llvm-commits

Differential Revision: https://reviews.llvm.org/D31845

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303172 91177308-0d34-0410-b5e6-96231b3b80d8

2017-05-16 14:11:39 +00:00

CMakeLists.txt

[CMake] NFC. Updating CMake dependency specifications

2016-11-17 04:36:50 +00:00

CoroCleanup.cpp

[Coroutines] Part 15a: Lower coro.subfn.addr in CoroCleanup

2016-09-30 18:41:35 +00:00

CoroEarly.cpp

[Coroutines] Part13: Handle single edge PHINodes across suspends

2016-09-09 05:39:00 +00:00

CoroElide.cpp

Allow DataLayout to specify addrspace for allocas.