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6 Commits

Author SHA1 Message Date
Heejin Ahn
095796a391 [WebAssembly] Split BBs after throw instructions 
Summary:
`throw` instruction is a terminator in wasm, but BBs were not splitted
after `throw` instructions, causing machine instruction verifier to
fail.

This patch
- Splits BBs after `throw` instructions in WasmEHPrepare and adding an
  unreachable instruction after `throw`, which will be deleted in
  LateEHPrepare pass
- Refactors WasmEHPrepare into two member functions
- Changes the semantics of `eraseBBsAndChildren` in LateEHPrepare pass
  to match that of WasmEHPrepare pass, which is newly added. Now
  `eraseBBsAndChildren` does not delete BBs with remaining predecessors.
- Fixes style nits, making static function names conform to clang-tidy
- Re-enables the test temporarily disabled by rL346840 && rL346845

Reviewers: dschuff

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

Differential Revision: https://reviews.llvm.org/D54571

llvm-svn: 347003
 2018-11-16 00:47:18 +00:00
Benjamin Kramer
c55e997556 Move some helpers from the global namespace into anonymous ones. 
llvm-svn: 344468
 2018-10-13 22:18:22 +00:00
Heejin Ahn
b68d591475 [WebAssembly] Don't modify preds/succs iterators while erasing from them 
Summary:
This caused out-of-bound bugs. Found by
`-DLLVM_ENABLE_EXPENSIVE_CHECKS=ON`.

Reviewers: dschuff

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

Differential Revision: https://reviews.llvm.org/D52902

llvm-svn: 343814
 2018-10-04 21:03:35 +00:00
Heejin Ahn
a93e726170 [WebAssembly] Modify LateEHPrepare one-line description (NFC) 
llvm-svn: 339972
 2018-08-17 00:12:04 +00:00
Benjamin Kramer
83996e4dee [Wasm] Don't iterate over MachineBasicBlock::successors while erasing from it 
This will read out of bounds. Found by asan.

llvm-svn: 339230
 2018-08-08 10:13:19 +00:00
Heejin Ahn
4934f76b58 [WebAssembly] Add WebAssemblyLateEHPrepare pass 
Summary:
Add WebAssemblyLateEHPrepare pass that does several small jobs for
exception handling. This runs before CFGSort, and is different from
WasmEHPrepare pass that runs before ISel, even though the names are
similar.

Reviewers: dschuff, majnemer

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

Differential Revision: https://reviews.llvm.org/D46803

llvm-svn: 335438
 2018-06-25 01:07:11 +00:00