Heejin Ahn d6f487863d [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
..
CMakeLists.txt	Remove trailing whitespace to trigger re-cmaking	2017-10-02 21:54:38 +00:00
DAGCombiner.cpp	[DAGCombiner] fold extract_subvector of extract_subvector	2019-01-29 19:13:39 +00:00
FastISel.cpp	Fix emission of _fltused for MSVC.	2019-01-24 18:34:00 +00:00
FunctionLoweringInfo.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
InstrEmitter.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
InstrEmitter.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LLVMBuild.txt	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LegalizeDAG.cpp	[TargetLowering] Rename getExpandedFixedPointMultiplication to expandFixedPointMul. NFCI.	2019-01-24 15:46:54 +00:00
LegalizeFloatTypes.cpp	[LegalizeTypes] Add debug prints to the top of PromoteFloatOperand and PromoteFloatResult.	2019-01-22 22:33:55 +00:00
LegalizeIntegerTypes.cpp	Recommit r352255 "[SelectionDAG][X86] Don't use SEXTLOAD for promoting masked loads in the type legalizer"	2019-01-28 21:38:47 +00:00
LegalizeTypes.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LegalizeTypes.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LegalizeTypesGeneric.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LegalizeVectorOps.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LegalizeVectorTypes.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ResourcePriorityQueue.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SDNodeDbgValue.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ScheduleDAGFast.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ScheduleDAGRRList.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ScheduleDAGSDNodes.cpp	[DebugInfo][DAG] Avoid re-ordering of DBG_VALUEs	2019-01-28 12:08:31 +00:00
ScheduleDAGSDNodes.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ScheduleDAGVLIW.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SelectionDAG.cpp	Codegen support for atomicrmw fadd/fsub	2019-01-22 18:36:06 +00:00
SelectionDAGAddressAnalysis.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SelectionDAGBuilder.cpp	[WebAssembly] Exception handling: Switch to the new proposal	2019-01-30 03:21:57 +00:00
SelectionDAGBuilder.h	Reversing the checkin for version 352484 as tests are failing.	2019-01-29 15:00:50 +00:00
SelectionDAGDumper.cpp	[X86] Update SelectionDAGDumper to print the extension type and expanding flag for masked loads. Add truncating and compressing for masked stores.	2019-01-24 07:51:34 +00:00
SelectionDAGISel.cpp	Fix emission of _fltused for MSVC.	2019-01-24 18:34:00 +00:00
SelectionDAGPrinter.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SelectionDAGTargetInfo.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StatepointLowering.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StatepointLowering.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TargetLowering.cpp	Adjust documentation for git migration.	2019-01-29 16:37:27 +00:00