Heejin Ahn 8c8ddd6602 [WebAssembly] Exception handling: Switch to the new proposal ... Summary: This switches the EH implementation to the new proposal: https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md (The previous proposal was https://github.com/WebAssembly/exception-handling/blob/master/proposals/old/Exceptions.md) - Instruction changes - Now we have one single `catch` instruction that returns a except_ref value - `throw` now can take variable number of operations - `rethrow` does not have 'depth' argument anymore - `br_on_exn` queries an except_ref to see if it matches the tag and branches to the given label if true. - `extract_exception` is a pseudo instruction that simulates popping values from wasm stack. This is to make `br_on_exn`, a very special instruction, work: `br_on_exn` puts values onto the stack only if it is taken, and the # of values can vay depending on the tag. - Now there's only one `catch` per `try`, this patch removes all special handling for terminate pad with a call to `__clang_call_terminate`. Before it was the only case there are two catch clauses (a normal `catch` and `catch_all` per `try`). - Make `rethrow` act as a terminator like `throw`. This splits BB after `rethrow` in WasmEHPrepare, and deletes an unnecessary `unreachable` after `rethrow` in LateEHPrepare. - Now we stop at all catchpads (because we add wasm `catch` instruction that catches all exceptions), this creates new `findWasmUnwindDestinations` function in SelectionDAGBuilder. - Now we use `br_on_exn` instrution to figure out if an except_ref matches the current tag or not, LateEHPrepare generates this sequence for catch pads: ``` catch block i32 br_on_exn $__cpp_exception end_block extract_exception ``` - Branch analysis for `br_on_exn` in WebAssemblyInstrInfo - Other various misc. changes to switch to the new proposal. Reviewers: dschuff Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D57134 llvm-svn: 352598		2019-01-30 03:21:57 +00:00
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ADT	Revert r351954 "Add a value_type to ArrayRef."	2019-01-25 15:25:52 +00:00
Analysis	[NFC] Fix warnings in unit test of r351725	2019-01-21 07:27:47 +00:00
AsmParser	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BinaryFormat	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Bitcode	Replace llvm::isPodLike<...> by llvm::is_trivially_copyable<...>	2019-01-20 21:19:56 +00:00
CodeGen	GlobalISel: Fix address space limit in LLT	2019-01-26 01:42:13 +00:00
DebugInfo	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Demangle	Update more file headers across all of the LLVM projects in the monorepo	2019-01-19 10:56:40 +00:00
ExecutionEngine	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
FuzzMutate	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
IR	[llvm] Clarify responsiblity of some of DILocation discriminator APIs	2019-01-24 00:10:25 +00:00
LineEditor	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Linker	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MC	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MI	MachineModuleInfo: Store more specific reference to LLVMTargetMachine; NFC	2018-11-05 23:49:13 +00:00
Object	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ObjectYAML	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Option	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
OptRemarks	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Passes	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ProfileData	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Support	[VFS] Fix warning and use better check.	2019-01-29 19:07:15 +00:00
Target	[WebAssembly] Exception handling: Switch to the new proposal	2019-01-30 03:21:57 +00:00
TextAPI	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
tools	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Transforms	[LV][VPlan] Change to implement VPlan based predication for	2019-01-23 22:43:12 +00:00
XRay	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CMakeLists.txt	[llvm-tapi] initial commit, supports ELF text stubs	2018-12-03 19:30:52 +00:00
unittest.cfg.in	Add support for unittest inputs.	2018-09-05 23:30:17 +00:00