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| author | Heejin Ahn <aheejin@gmail.com> | 2020-12-27 02:52:43 -0800 |
|---|---|---|
| committer | Heejin Ahn <aheejin@gmail.com> | 2021-01-09 03:42:38 -0800 |
| commit | 4e4df1e38d6b66083b3badb78e56b8b0f6045fd1 (patch) | |
| tree | ac44616a117cccb6bd07c713ef492adae55c6ecf /llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp | |
| parent | 2c442629f0bd210fdb76fa409e131c87387e884d (diff) | |
| download | llvm-4e4df1e38d6b66083b3badb78e56b8b0f6045fd1.zip llvm-4e4df1e38d6b66083b3badb78e56b8b0f6045fd1.tar.gz llvm-4e4df1e38d6b66083b3badb78e56b8b0f6045fd1.tar.bz2 | |
[WebAssembly] Remove unreachable EH pads
This removes unreachable EH pads in LateEHPrepare. This is not for
optimization but for preparation for CFGStackify. In CFGStackify, we
determine where to place `try` marker by computing the nearest common
dominator of all predecessors of an EH pad, but when an EH pad does not
have a predecessor, it becomes tricky. We can insert an empty dummy BB
before the EH pad and place the `try` there, but removing unreachable EH
pads is simpler.
This moves an existing exception label test from eh-label.mir to
exception.mir and adds a new test there.
This also adds some comments to existing methods.
Reviewed By: dschuff, tlively
Differential Revision: https://reviews.llvm.org/D94044
Diffstat (limited to 'llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp')
0 files changed, 0 insertions, 0 deletions