5ef4d5f9c1
Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
83 lines
3.4 KiB
C++
83 lines
3.4 KiB
C++
//===-- WebAssembly.h - Top-level interface for WebAssembly ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file contains the entry points for global functions defined in
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/// the LLVM WebAssembly back-end.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLY_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLY_H
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#include "llvm/PassRegistry.h"
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#include "llvm/Support/CodeGen.h"
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namespace llvm {
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class WebAssemblyTargetMachine;
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class ModulePass;
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class FunctionPass;
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// LLVM IR passes.
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ModulePass *createWebAssemblyLowerEmscriptenEHSjLj(bool DoEH, bool DoSjLj);
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ModulePass *createWebAssemblyLowerGlobalDtors();
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ModulePass *createWebAssemblyFixFunctionBitcasts();
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FunctionPass *createWebAssemblyOptimizeReturned();
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// ISel and immediate followup passes.
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FunctionPass *createWebAssemblyISelDag(WebAssemblyTargetMachine &TM,
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CodeGenOpt::Level OptLevel);
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FunctionPass *createWebAssemblyArgumentMove();
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FunctionPass *createWebAssemblySetP2AlignOperands();
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// Late passes.
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FunctionPass *createWebAssemblyReplacePhysRegs();
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FunctionPass *createWebAssemblyPrepareForLiveIntervals();
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FunctionPass *createWebAssemblyOptimizeLiveIntervals();
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FunctionPass *createWebAssemblyStoreResults();
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FunctionPass *createWebAssemblyRegStackify();
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FunctionPass *createWebAssemblyRegColoring();
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FunctionPass *createWebAssemblyExplicitLocals();
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FunctionPass *createWebAssemblyFixIrreducibleControlFlow();
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FunctionPass *createWebAssemblyExceptionPrepare();
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FunctionPass *createWebAssemblyCFGSort();
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FunctionPass *createWebAssemblyCFGStackify();
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FunctionPass *createWebAssemblyLowerBrUnless();
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FunctionPass *createWebAssemblyRegNumbering();
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FunctionPass *createWebAssemblyPeephole();
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FunctionPass *createWebAssemblyCallIndirectFixup();
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// PassRegistry initialization declarations.
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void initializeWebAssemblyLowerEmscriptenEHSjLjPass(PassRegistry &);
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void initializeLowerGlobalDtorsPass(PassRegistry &);
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void initializeFixFunctionBitcastsPass(PassRegistry &);
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void initializeOptimizeReturnedPass(PassRegistry &);
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void initializeWebAssemblyArgumentMovePass(PassRegistry &);
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void initializeWebAssemblySetP2AlignOperandsPass(PassRegistry &);
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void initializeWebAssemblyReplacePhysRegsPass(PassRegistry &);
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void initializeWebAssemblyPrepareForLiveIntervalsPass(PassRegistry &);
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void initializeWebAssemblyOptimizeLiveIntervalsPass(PassRegistry &);
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void initializeWebAssemblyStoreResultsPass(PassRegistry &);
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void initializeWebAssemblyRegStackifyPass(PassRegistry &);
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void initializeWebAssemblyRegColoringPass(PassRegistry &);
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void initializeWebAssemblyExplicitLocalsPass(PassRegistry &);
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void initializeWebAssemblyFixIrreducibleControlFlowPass(PassRegistry &);
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void initializeWebAssemblyExceptionPreparePass(PassRegistry &);
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void initializeWebAssemblyCFGSortPass(PassRegistry &);
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void initializeWebAssemblyCFGStackifyPass(PassRegistry &);
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void initializeWebAssemblyLowerBrUnlessPass(PassRegistry &);
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void initializeWebAssemblyRegNumberingPass(PassRegistry &);
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void initializeWebAssemblyPeepholePass(PassRegistry &);
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void initializeWebAssemblyCallIndirectFixupPass(PassRegistry &);
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} // end namespace llvm
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#endif
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