1 files changed, 0 insertions, 87 deletions
diff --git a/lib/Target/WebAssembly/WebAssemblyEHRestoreStackPointer.cpp b/lib/Target/WebAssembly/WebAssemblyEHRestoreStackPointer.cpp
deleted file mode 100644
index c86260ba408c..000000000000
--- a/lib/Target/WebAssembly/WebAssemblyEHRestoreStackPointer.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-//===-- WebAssemblyEHRestoreStackPointer.cpp - __stack_pointer restoration ===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// After the stack is unwound due to a thrown exception, the __stack_pointer
-/// global can point to an invalid address. This inserts instructions that
-/// restore __stack_pointer global.
-///
-//===----------------------------------------------------------------------===//
-
-#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
-#include "WebAssembly.h"
-#include "WebAssemblySubtarget.h"
-#include "WebAssemblyUtilities.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/MC/MCAsmInfo.h"
-using namespace llvm;
-
-#define DEBUG_TYPE "wasm-eh-restore-stack-pointer"
-
-namespace {
-class WebAssemblyEHRestoreStackPointer final : public MachineFunctionPass {
-public:
-  static char ID; // Pass identification, replacement for typeid
-  WebAssemblyEHRestoreStackPointer() : MachineFunctionPass(ID) {}
-
-  StringRef getPassName() const override {
-    return "WebAssembly Restore Stack Pointer for Exception Handling";
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.setPreservesCFG();
-    MachineFunctionPass::getAnalysisUsage(AU);
-  }
-
-  bool runOnMachineFunction(MachineFunction &MF) override;
-};
-} // end anonymous namespace
-
-char WebAssemblyEHRestoreStackPointer::ID = 0;
-INITIALIZE_PASS(WebAssemblyEHRestoreStackPointer, DEBUG_TYPE,
-                "Restore Stack Pointer for Exception Handling", true, false)
-
-FunctionPass *llvm::createWebAssemblyEHRestoreStackPointer() {
-  return new WebAssemblyEHRestoreStackPointer();
-}
-
-bool WebAssemblyEHRestoreStackPointer::runOnMachineFunction(
-    MachineFunction &MF) {
-  LLVM_DEBUG(dbgs() << "********** EH Restore Stack Pointer **********\n"
-                       "********** Function: "
-                    << MF.getName() << '\n');
-
-  const auto *FrameLowering = static_cast<const WebAssemblyFrameLowering *>(
-      MF.getSubtarget().getFrameLowering());
-  if (!FrameLowering->needsPrologForEH(MF))
-    return false;
-  bool Changed = false;
-
-  for (auto &MBB : MF) {
-    if (!MBB.isEHPad())
-      continue;
-    Changed = true;
-
-    // Insert __stack_pointer restoring instructions at the beginning of each EH
-    // pad, after the catch instruction. (Catch instructions may have been
-    // reordered, and catch_all instructions have not been inserted yet, but
-    // those cases are handled in LateEHPrepare).
-    //
-    // Here it is safe to assume that SP32 holds the latest value of
-    // __stack_pointer, because the only exception for this case is when a
-    // function uses the red zone, but that only happens with leaf functions,
-    // and we don't restore __stack_pointer in leaf functions anyway.
-    auto InsertPos = MBB.begin();
-    if (WebAssembly::isCatch(*MBB.begin()))
-      InsertPos++;
-    FrameLowering->writeSPToGlobal(WebAssembly::SP32, MF, MBB, InsertPos,
-                                   MBB.begin()->getDebugLoc());
-  }
-  return Changed;
-}