llvm16 targets

1 files changed, 102 insertions, 0 deletions

diff --git a/contrib/libs/llvm16/lib/Target/WebAssembly/WebAssemblyMCLowerPrePass.cpp b/contrib/libs/llvm16/lib/Target/WebAssembly/WebAssemblyMCLowerPrePass.cpp
new file mode 100644
index 0000000000..21f6fd37d4
--- /dev/null
+++ b/contrib/libs/llvm16/lib/Target/WebAssembly/WebAssemblyMCLowerPrePass.cpp
@@ -0,0 +1,102 @@
+//===-- WebAssemblyMCLowerPrePass.cpp - Prepare for MC lower --------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Some information in MC lowering / asm printing gets generated as
+/// instructions get emitted, but may be necessary at the start, such as for
+/// .globaltype declarations. This pass collects this information.
+///
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
+#include "Utils/WebAssemblyUtilities.h"
+#include "WebAssembly.h"
+#include "WebAssemblyMachineFunctionInfo.h"
+#include "WebAssemblySubtarget.h"
+#include "llvm/ADT/SCCIterator.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineLoopInfo.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "wasm-mclower-prepass"
+
+namespace {
+class WebAssemblyMCLowerPrePass final : public ModulePass {
+  StringRef getPassName() const override {
+    return "WebAssembly MC Lower Pre Pass";
+  }
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    ModulePass::getAnalysisUsage(AU);
+  }
+
+  bool runOnModule(Module &M) override;
+
+public:
+  static char ID; // Pass identification, replacement for typeid
+  WebAssemblyMCLowerPrePass() : ModulePass(ID) {}
+};
+} // end anonymous namespace
+
+char WebAssemblyMCLowerPrePass::ID = 0;
+INITIALIZE_PASS(
+    WebAssemblyMCLowerPrePass, DEBUG_TYPE,
+    "Collects information ahead of time for MC lowering",
+    false, false)
+
+ModulePass *llvm::createWebAssemblyMCLowerPrePass() {
+  return new WebAssemblyMCLowerPrePass();
+}
+
+// NOTE: this is a ModulePass since we need to enforce that this code has run
+// for all functions before AsmPrinter. If this way of doing things is ever
+// suboptimal, we could opt to make it a MachineFunctionPass and instead use
+// something like createBarrierNoopPass() to enforce ordering.
+//
+// The information stored here is essential for emitExternalDecls in the Wasm
+// AsmPrinter
+bool WebAssemblyMCLowerPrePass::runOnModule(Module &M) {
+  auto *MMIWP = getAnalysisIfAvailable<MachineModuleInfoWrapperPass>();
+  if (!MMIWP)
+    return true;
+
+  MachineModuleInfo &MMI = MMIWP->getMMI();
+  MachineModuleInfoWasm &MMIW = MMI.getObjFileInfo<MachineModuleInfoWasm>();
+
+  for (Function &F : M) {
+    MachineFunction *MF = MMI.getMachineFunction(F);
+    if (!MF)
+      continue;
+
+    LLVM_DEBUG(dbgs() << "********** MC Lower Pre Pass **********\n"
+                         "********** Function: "
+                      << MF->getName() << '\n');
+
+    for (MachineBasicBlock &MBB : *MF) {
+      for (auto &MI : MBB) {
+        // FIXME: what should all be filtered out beyond these?
+        if (MI.isDebugInstr() || MI.isInlineAsm())
+          continue;
+        for (MachineOperand &MO : MI.uses()) {
+          if (MO.isSymbol()) {
+            MMIW.MachineSymbolsUsed.insert(MO.getSymbolName());
+          }
+        }
+      }
+    }
+  }
+  return true;
+}