[llvm] 7dc98ad - Revert "[WebAssembly] call_indirect issues table number relocs"

Andy Wingo via llvm-commits llvm-commits at lists.llvm.org
Tue Feb 23 02:50:48 PST 2021


Author: Andy Wingo
Date: 2021-02-23T11:48:08+01:00
New Revision: 7dc98adbb0e274934410b78f0a3c45762326325c

URL: https://github.com/llvm/llvm-project/commit/7dc98adbb0e274934410b78f0a3c45762326325c
DIFF: https://github.com/llvm/llvm-project/commit/7dc98adbb0e274934410b78f0a3c45762326325c.diff

LOG: Revert "[WebAssembly] call_indirect issues table number relocs"

This reverts commit 861dbe1a021e6439af837b72b219fb9c449a57ae.  It broke
emscripten -- see https://reviews.llvm.org/D90948#2578843.

Added: 
    

Modified: 
    lld/test/wasm/compress-relocs.ll
    llvm/include/llvm/MC/MCSymbolWasm.h
    llvm/lib/MC/WasmObjectWriter.cpp
    llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp
    llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
    llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
    llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
    llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
    llvm/lib/Target/WebAssembly/WebAssemblyInstrCall.td
    llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
    llvm/lib/Target/WebAssembly/WebAssemblyUtilities.cpp
    llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h
    llvm/test/CodeGen/WebAssembly/function-pointer64.ll
    llvm/test/CodeGen/WebAssembly/multivalue.ll
    llvm/test/MC/WebAssembly/basic-assembly.s
    llvm/test/MC/WebAssembly/function-alias.ll
    llvm/test/MC/WebAssembly/reloc-code.ll
    llvm/test/MC/WebAssembly/reloc-pic.s
    llvm/test/MC/WebAssembly/tail-call-encodings.s
    llvm/test/MC/WebAssembly/type-index.s
    llvm/test/MC/WebAssembly/weak-alias.s

Removed: 
    llvm/test/MC/WebAssembly/call-indirect-relocs.s


################################################################################
diff  --git a/lld/test/wasm/compress-relocs.ll b/lld/test/wasm/compress-relocs.ll
index f1faab754cb7..4d4ac4b705ee 100644
--- a/lld/test/wasm/compress-relocs.ll
+++ b/lld/test/wasm/compress-relocs.ll
@@ -1,5 +1,5 @@
 ; RUN: llc -filetype=obj %s -o %t.o
-; RUN: llvm-mc -mattr=+reference-types -filetype=obj -triple=wasm32-unknown-unknown %p/Inputs/call-indirect.s -o %t2.o
+; RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %p/Inputs/call-indirect.s -o %t2.o
 ; RUN: wasm-ld --export-dynamic -o %t.wasm %t2.o %t.o
 ; RUN: obj2yaml %t.wasm | FileCheck %s
 ; RUN: wasm-ld --export-dynamic -O2 -o %t-opt.wasm %t2.o %t.o
@@ -22,5 +22,5 @@ entry:
 
 ; ERROR: wasm-ld: error: --compress-relocations is incompatible with output debug information. Please pass --strip-debug or --strip-all
 
-; CHECK:    Body:            41002802808880800011808080800080808080001A41002802848880800011818080800080808080001A0B
+; CHECK:    Body:            410028028088808000118080808000001A410028028488808000118180808000001A0B
 ; COMPRESS: Body:            4100280280081100001A4100280284081101001A0B

diff  --git a/llvm/include/llvm/MC/MCSymbolWasm.h b/llvm/include/llvm/MC/MCSymbolWasm.h
index 49d57919f6f3..dbb1cb04fc5d 100644
--- a/llvm/include/llvm/MC/MCSymbolWasm.h
+++ b/llvm/include/llvm/MC/MCSymbolWasm.h
@@ -18,7 +18,6 @@ class MCSymbolWasm : public MCSymbol {
   bool IsWeak = false;
   bool IsHidden = false;
   bool IsComdat = false;
-  bool OmitFromLinkingSection = false;
   mutable bool IsUsedInInitArray = false;
   mutable bool IsUsedInGOT = false;
   Optional<StringRef> ImportModule;
@@ -76,12 +75,6 @@ class MCSymbolWasm : public MCSymbol {
   bool isComdat() const { return IsComdat; }
   void setComdat(bool isComdat) { IsComdat = isComdat; }
 
-  // wasm-ld understands a finite set of symbol types.  This flag allows the
-  // compiler to avoid emitting symbol table entries that would confuse the
-  // linker, unless the user specifically requests the feature.
-  bool omitFromLinkingSection() const { return OmitFromLinkingSection; }
-  void setOmitFromLinkingSection() { OmitFromLinkingSection = true; }
-
   bool hasImportModule() const { return ImportModule.hasValue(); }
   StringRef getImportModule() const {
     if (ImportModule.hasValue())

diff  --git a/llvm/lib/MC/WasmObjectWriter.cpp b/llvm/lib/MC/WasmObjectWriter.cpp
index b2c8c022b5c8..d16be49c92e6 100644
--- a/llvm/lib/MC/WasmObjectWriter.cpp
+++ b/llvm/lib/MC/WasmObjectWriter.cpp
@@ -405,17 +405,12 @@ void WasmObjectWriter::writeHeader(const MCAssembler &Asm) {
 
 void WasmObjectWriter::executePostLayoutBinding(MCAssembler &Asm,
                                                 const MCAsmLayout &Layout) {
-  // Some compilation units require the indirect function table to be present
-  // but don't explicitly reference it.  This is the case for call_indirect
-  // without the reference-types feature, and also function bitcasts in all
-  // cases.  In those cases the __indirect_function_table has the
-  // WASM_SYMBOL_NO_STRIP attribute.  Here we make sure this symbol makes it to
-  // the assembler, if needed.
-  if (auto *Sym = Asm.getContext().lookupSymbol("__indirect_function_table")) {
-    const auto *WasmSym = static_cast<const MCSymbolWasm *>(Sym);
-    if (WasmSym->isNoStrip())
-      Asm.registerSymbol(*Sym);
-  }
+  // As a stopgap measure until call_indirect instructions start explicitly
+  // referencing the indirect function table via TABLE_NUMBER relocs, ensure
+  // that the indirect function table import makes it to the output if anything
+  // in the compilation unit has caused it to be present.
+  if (auto *Sym = Asm.getContext().lookupSymbol("__indirect_function_table"))
+    Asm.registerSymbol(*Sym);
 
   // Build a map of sections to the function that defines them, for use
   // in recordRelocation.
@@ -514,18 +509,21 @@ void WasmObjectWriter::recordRelocation(MCAssembler &Asm,
       Type == wasm::R_WASM_TABLE_INDEX_I32 ||
       Type == wasm::R_WASM_TABLE_INDEX_I64) {
     // TABLE_INDEX relocs implicitly use the default indirect function table.
-    // We require the function table to have already been defined.
     auto TableName = "__indirect_function_table";
     MCSymbolWasm *Sym = cast_or_null<MCSymbolWasm>(Ctx.lookupSymbol(TableName));
-    if (!Sym || !Sym->isFunctionTable()) {
-      Ctx.reportError(
-          Fixup.getLoc(),
-          "symbol '__indirect_function_table' is not a function table");
+    if (Sym) {
+      if (!Sym->isFunctionTable())
+        Ctx.reportError(
+            Fixup.getLoc(),
+            "symbol '__indirect_function_table' is not a function table");
     } else {
-      // Ensure that __indirect_function_table reaches the output.
-      Sym->setNoStrip();
-      Asm.registerSymbol(*Sym);
+      Sym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(TableName));
+      Sym->setFunctionTable();
+      // The default function table is synthesized by the linker.
+      Sym->setUndefined();
     }
+    Sym->setUsedInReloc();
+    Asm.registerSymbol(*Sym);
   }
 
   // Relocation other than R_WASM_TYPE_INDEX_LEB are required to be
@@ -1213,9 +1211,6 @@ static bool isInSymtab(const MCSymbolWasm &Sym) {
   if (Sym.isSection())
     return false;
 
-  if (Sym.omitFromLinkingSection())
-    return false;
-
   return true;
 }
 
@@ -1679,6 +1674,10 @@ uint64_t WasmObjectWriter::writeOneObject(MCAssembler &Asm,
       WS.setIndex(InvalidIndex);
       continue;
     }
+    if (WS.isTable() && WS.getName() == "__indirect_function_table") {
+      // For the moment, don't emit table symbols -- wasm-ld can't handle them.
+      continue;
+    }
     LLVM_DEBUG(dbgs() << "adding to symtab: " << WS << "\n");
 
     uint32_t Flags = 0;

diff  --git a/llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp b/llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp
index cd0f9dc32ec4..9a2ae0100b50 100644
--- a/llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp
+++ b/llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp
@@ -171,6 +171,9 @@ struct WebAssemblyOperand : public MCParsedAsmOperand {
 
 static MCSymbolWasm *GetOrCreateFunctionTableSymbol(MCContext &Ctx,
                                                     const StringRef &Name) {
+  // FIXME: Duplicates functionality from
+  // MC/WasmObjectWriter::recordRelocation, as well as WebAssemblyCodegen's
+  // WebAssembly:getOrCreateFunctionTableSymbol.
   MCSymbolWasm *Sym = cast_or_null<MCSymbolWasm>(Ctx.lookupSymbol(Name));
   if (Sym) {
     if (!Sym->isFunctionTable())
@@ -220,7 +223,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
   };
   std::vector<NestingType> NestingStack;
 
-  MCSymbolWasm *DefaultFunctionTable = nullptr;
   MCSymbol *LastFunctionLabel = nullptr;
 
 public:
@@ -231,15 +233,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
   }
 
-  void Initialize(MCAsmParser &Parser) override {
-    MCAsmParserExtension::Initialize(Parser);
-
-    DefaultFunctionTable = GetOrCreateFunctionTableSymbol(
-        getContext(), "__indirect_function_table");
-    if (!STI->checkFeatures("+reference-types"))
-      DefaultFunctionTable->setOmitFromLinkingSection();
-  }
-
 #define GET_ASSEMBLER_HEADER
 #include "WebAssemblyGenAsmMatcher.inc"
 
@@ -487,39 +480,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
         WebAssemblyOperand::IntOp{static_cast<int64_t>(BT)}));
   }
 
-  bool addFunctionTableOperand(OperandVector &Operands, MCSymbolWasm *Sym,
-                               SMLoc StartLoc, SMLoc EndLoc) {
-    const auto *Val = MCSymbolRefExpr::create(Sym, getContext());
-    Operands.push_back(std::make_unique<WebAssemblyOperand>(
-        WebAssemblyOperand::Symbol, StartLoc, EndLoc,
-        WebAssemblyOperand::SymOp{Val}));
-    return false;
-  }
-
-  bool addFunctionTableOperand(OperandVector &Operands, StringRef TableName,
-                               SMLoc StartLoc, SMLoc EndLoc) {
-    return addFunctionTableOperand(
-        Operands, GetOrCreateFunctionTableSymbol(getContext(), TableName),
-        StartLoc, EndLoc);
-  }
-
-  bool addDefaultFunctionTableOperand(OperandVector &Operands, SMLoc StartLoc,
-                                      SMLoc EndLoc) {
-    if (STI->checkFeatures("+reference-types")) {
-      return addFunctionTableOperand(Operands, DefaultFunctionTable, StartLoc,
-                                     EndLoc);
-    } else {
-      // For the MVP there is at most one table whose number is 0, but we can't
-      // write a table symbol or issue relocations.  Instead we just ensure the
-      // table is live and write a zero.
-      getStreamer().emitSymbolAttribute(DefaultFunctionTable, MCSA_NoDeadStrip);
-      Operands.push_back(std::make_unique<WebAssemblyOperand>(
-          WebAssemblyOperand::Integer, StartLoc, EndLoc,
-          WebAssemblyOperand::IntOp{0}));
-      return false;
-    }
-  }
-
   bool ParseInstruction(ParseInstructionInfo & /*Info*/, StringRef Name,
                         SMLoc NameLoc, OperandVector &Operands) override {
     // Note: Name does NOT point into the sourcecode, but to a local, so
@@ -556,7 +516,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
     bool ExpectBlockType = false;
     bool ExpectFuncType = false;
     bool ExpectHeapType = false;
-    bool ExpectFunctionTable = false;
     if (Name == "block") {
       push(Block);
       ExpectBlockType = true;
@@ -603,7 +562,15 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
         return true;
     } else if (Name == "call_indirect" || Name == "return_call_indirect") {
       ExpectFuncType = true;
-      ExpectFunctionTable = true;
+      // Ensure that the object file has a __indirect_function_table import, as
+      // we call_indirect against it.
+      auto &Ctx = getStreamer().getContext();
+      MCSymbolWasm *Sym =
+          GetOrCreateFunctionTableSymbol(Ctx, "__indirect_function_table");
+      // Until call_indirect emits TABLE_NUMBER relocs against this symbol, mark
+      // it as NO_STRIP so as to ensure that the indirect function table makes
+      // it to linked output.
+      Sym->setNoStrip();
     } else if (Name == "ref.null") {
       ExpectHeapType = true;
     }
@@ -619,7 +586,7 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
         return true;
       // Got signature as block type, don't need more
       ExpectBlockType = false;
-      auto &Ctx = getContext();
+      auto &Ctx = getStreamer().getContext();
       // The "true" here will cause this to be a nameless symbol.
       MCSymbol *Sym = Ctx.createTempSymbol("typeindex", true);
       auto *WasmSym = cast<MCSymbolWasm>(Sym);
@@ -631,16 +598,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
       Operands.push_back(std::make_unique<WebAssemblyOperand>(
           WebAssemblyOperand::Symbol, Loc.getLoc(), Loc.getEndLoc(),
           WebAssemblyOperand::SymOp{Expr}));
-
-      // Allow additional operands after the signature, notably for
-      // call_indirect against a named table.
-      if (Lexer.isNot(AsmToken::EndOfStatement)) {
-        if (expect(AsmToken::Comma, ","))
-          return true;
-        if (Lexer.is(AsmToken::EndOfStatement)) {
-          return error("Unexpected trailing comma");
-        }
-      }
     }
 
     while (Lexer.isNot(AsmToken::EndOfStatement)) {
@@ -666,11 +623,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
               WebAssemblyOperand::Integer, Id.getLoc(), Id.getEndLoc(),
               WebAssemblyOperand::IntOp{static_cast<int64_t>(HeapType)}));
           Parser.Lex();
-        } else if (ExpectFunctionTable) {
-          if (addFunctionTableOperand(Operands, Id.getString(), Id.getLoc(),
-                                      Id.getEndLoc()))
-            return true;
-          Parser.Lex();
         } else {
           // Assume this identifier is a label.
           const MCExpr *Val;
@@ -737,12 +689,6 @@ class WebAssemblyAsmParser final : public MCTargetAsmParser {
       // Support blocks with no operands as default to void.
       addBlockTypeOperand(Operands, NameLoc, WebAssembly::BlockType::Void);
     }
-    if (ExpectFunctionTable && Operands.size() == 2) {
-      // If call_indirect doesn't specify a target table, supply one.
-      if (addDefaultFunctionTableOperand(Operands, NameLoc,
-                                         SMLoc::getFromPointer(Name.end())))
-        return true;
-    }
     Parser.Lex();
     return false;
   }

diff  --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
index f1afefd2c7c5..39b95da94e7c 100644
--- a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
@@ -68,7 +68,7 @@ void WebAssemblyInstPrinter::printInst(const MCInst *MI, uint64_t Address,
     for (auto I = Start, E = MI->getNumOperands(); I < E; ++I) {
       if (MI->getOpcode() == WebAssembly::CALL_INDIRECT &&
           I - Start == NumVariadicDefs) {
-        // Skip type and table arguments when printing for tests.
+        // Skip type and flags arguments when printing for tests
         ++I;
         continue;
       }

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
index bef6d585a6fc..7f1c4bb40a4c 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
@@ -23,7 +23,6 @@
 #include "WebAssemblyMachineFunctionInfo.h"
 #include "WebAssemblyRegisterInfo.h"
 #include "WebAssemblyTargetMachine.h"
-#include "WebAssemblyUtilities.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/BinaryFormat/Wasm.h"
@@ -172,25 +171,19 @@ MCSymbolWasm *WebAssemblyAsmPrinter::getMCSymbolForFunction(
 
 void WebAssemblyAsmPrinter::emitEndOfAsmFile(Module &M) {
   for (auto &It : OutContext.getSymbols()) {
-    // Emit .globaltype, .eventtype, or .tabletype declarations.
+    // Emit a .globaltype and .eventtype declaration.
     auto Sym = cast<MCSymbolWasm>(It.getValue());
     if (Sym->getType() == wasm::WASM_SYMBOL_TYPE_GLOBAL)
       getTargetStreamer()->emitGlobalType(Sym);
     else if (Sym->getType() == wasm::WASM_SYMBOL_TYPE_EVENT)
       getTargetStreamer()->emitEventType(Sym);
-    else if (Sym->getType() == wasm::WASM_SYMBOL_TYPE_TABLE)
-      getTargetStreamer()->emitTableType(Sym);
   }
 
   DenseSet<MCSymbol *> InvokeSymbols;
-  bool HasAddressTakenFunction = false;
   for (const auto &F : M) {
     if (F.isIntrinsic())
       continue;
 
-    if (F.hasAddressTaken())
-      HasAddressTakenFunction = true;
-
     // Emit function type info for all undefined functions
     if (F.isDeclarationForLinker()) {
       SmallVector<MVT, 4> Results;
@@ -249,18 +242,6 @@ void WebAssemblyAsmPrinter::emitEndOfAsmFile(Module &M) {
     }
   }
 
-  // When a function's address is taken, a TABLE_INDEX relocation is emitted
-  // against the function symbol at the use site.  However the relocation
-  // doesn't explicitly refer to the table.  In the future we may want to
-  // define a new kind of reloc against both the function and the table, so
-  // that the linker can see that the function symbol keeps the table alive,
-  // but for now manually mark the table as live.
-  if (HasAddressTakenFunction) {
-    MCSymbolWasm *FunctionTable =
-        WebAssembly::getOrCreateFunctionTableSymbol(OutContext, Subtarget);
-    OutStreamer->emitSymbolAttribute(FunctionTable, MCSA_NoDeadStrip);
-  }
-
   for (const auto &G : M.globals()) {
     if (!G.hasInitializer() && G.hasExternalLinkage()) {
       if (G.getValueType()->isSized()) {

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
index d60c1624ff16..509f2be8de59 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
@@ -869,20 +869,19 @@ bool WebAssemblyFastISel::selectCall(const Instruction *I) {
   if (IsDirect) {
     MIB.addGlobalAddress(Func);
   } else {
-    // Placehoder for the type index.
+    // Add placeholders for the type index and immediate flags
     MIB.addImm(0);
-    // The table into which this call_indirect indexes.
-    MCSymbolWasm *Table = WebAssembly::getOrCreateFunctionTableSymbol(
-        MF->getMMI().getContext(), Subtarget);
-    if (Subtarget->hasReferenceTypes()) {
-      MIB.addSym(Table);
-    } else {
-      // Otherwise for the MVP there is at most one table whose number is 0, but
-      // we can't write a table symbol or issue relocations.  Instead we just
-      // ensure the table is live.
-      Table->setNoStrip();
-      MIB.addImm(0);
-    }
+    MIB.addImm(0);
+
+    // Ensure that the object file has a __indirect_function_table import, as we
+    // call_indirect against it.
+    MCSymbolWasm *Sym = WebAssembly::getOrCreateFunctionTableSymbol(
+        MF->getMMI().getContext(), "__indirect_function_table");
+    // Until call_indirect emits TABLE_NUMBER relocs against this symbol, mark
+    // it as NO_STRIP so as to ensure that the indirect function table makes it
+    // to linked output.
+    Sym->setNoStrip();
+
     // See if we must truncate the function pointer.
     // CALL_INDIRECT takes an i32, but in wasm64 we represent function pointers
     // as 64-bit for uniformity with other pointer types.

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index a515a5f4aef2..d8680fae0c93 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -426,10 +426,9 @@ static MachineBasicBlock *LowerFPToInt(MachineInstr &MI, DebugLoc DL,
   return DoneMBB;
 }
 
-static MachineBasicBlock *
-LowerCallResults(MachineInstr &CallResults, DebugLoc DL, MachineBasicBlock *BB,
-                 const WebAssemblySubtarget *Subtarget,
-                 const TargetInstrInfo &TII) {
+static MachineBasicBlock *LowerCallResults(MachineInstr &CallResults,
+                                           DebugLoc DL, MachineBasicBlock *BB,
+                                           const TargetInstrInfo &TII) {
   MachineInstr &CallParams = *CallResults.getPrevNode();
   assert(CallParams.getOpcode() == WebAssembly::CALL_PARAMS);
   assert(CallResults.getOpcode() == WebAssembly::CALL_RESULTS ||
@@ -477,21 +476,19 @@ LowerCallResults(MachineInstr &CallResults, DebugLoc DL, MachineBasicBlock *BB,
   for (auto Def : CallResults.defs())
     MIB.add(Def);
 
+  // Add placeholders for the type index and immediate flags
   if (IsIndirect) {
-    // Placeholder for the type index.
     MIB.addImm(0);
-    // The table into which this call_indirect indexes.
-    MCSymbolWasm *Table =
-        WebAssembly::getOrCreateFunctionTableSymbol(MF.getContext(), Subtarget);
-    if (Subtarget->hasReferenceTypes()) {
-      MIB.addSym(Table);
-    } else {
-      // For the MVP there is at most one table whose number is 0, but we can't
-      // write a table symbol or issue relocations.  Instead we just ensure the
-      // table is live and write a zero.
-      Table->setNoStrip();
-      MIB.addImm(0);
-    }
+    MIB.addImm(0);
+
+    // Ensure that the object file has a __indirect_function_table import, as we
+    // call_indirect against it.
+    MCSymbolWasm *Sym = WebAssembly::getOrCreateFunctionTableSymbol(
+        MF.getContext(), "__indirect_function_table");
+    // Until call_indirect emits TABLE_NUMBER relocs against this symbol, mark
+    // it as NO_STRIP so as to ensure that the indirect function table makes it
+    // to linked output.
+    Sym->setNoStrip();
   }
 
   for (auto Use : CallParams.uses())
@@ -538,7 +535,7 @@ MachineBasicBlock *WebAssemblyTargetLowering::EmitInstrWithCustomInserter(
                         WebAssembly::I64_TRUNC_U_F64);
   case WebAssembly::CALL_RESULTS:
   case WebAssembly::RET_CALL_RESULTS:
-    return LowerCallResults(MI, DL, BB, Subtarget, TII);
+    return LowerCallResults(MI, DL, BB, TII);
   }
 }
 

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrCall.td b/llvm/lib/Target/WebAssembly/WebAssemblyInstrCall.td
index 6a123f8f4030..b997c1c16fcb 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyInstrCall.td
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrCall.td
@@ -48,9 +48,6 @@ defm RET_CALL_RESULTS :
   I<(outs), (ins variable_ops), (outs), (ins), [],
      "return_call_results", "return_call_results", -1>;
 
-// Note that instructions with variable_ops have custom printers in
-// WebAssemblyInstPrinter.cpp.
-
 let variadicOpsAreDefs = 1 in
 defm CALL :
   I<(outs), (ins function32_op:$callee, variable_ops),
@@ -59,12 +56,9 @@ defm CALL :
 
 let variadicOpsAreDefs = 1 in
 defm CALL_INDIRECT :
-  I<(outs),
-    (ins TypeIndex:$type, table32_op:$table, variable_ops),
-    (outs),
-    (ins TypeIndex:$type, table32_op:$table),
-    [],
-    "call_indirect", "call_indirect\t$type, $table", 0x11>;
+ I<(outs), (ins TypeIndex:$type, i32imm:$flags, variable_ops),
+   (outs), (ins TypeIndex:$type, i32imm:$flags), [],
+   "call_indirect", "call_indirect\t$type", 0x11>;
 
 let isReturn = 1, isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in
 defm RET_CALL :
@@ -75,9 +69,9 @@ defm RET_CALL :
 
 let isReturn = 1 in
 defm RET_CALL_INDIRECT :
-  I<(outs), (ins TypeIndex:$type, table32_op:$table, variable_ops),
-    (outs), (ins TypeIndex:$type, table32_op:$table), [],
-    "return_call_indirect\t", "return_call_indirect\t$type, $table",
+  I<(outs), (ins TypeIndex:$type, i32imm:$flags, variable_ops),
+    (outs), (ins TypeIndex:$type, i32imm:$flags), [],
+    "return_call_indirect\t", "return_call_indirect\t$type",
     0x13>,
   Requires<[HasTailCall]>;
 

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
index 95f2744a84b0..280fbf9d4dbb 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
@@ -161,8 +161,6 @@ MCOperand WebAssemblyMCInstLower::lowerSymbolOperand(const MachineOperand &MO,
       report_fatal_error("Global indexes with offsets not supported");
     if (WasmSym->isEvent())
       report_fatal_error("Event indexes with offsets not supported");
-    if (WasmSym->isTable())
-      report_fatal_error("Table indexes with offsets not supported");
 
     Expr = MCBinaryExpr::createAdd(
         Expr, MCConstantExpr::create(MO.getOffset(), Ctx), Ctx);

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.cpp
index 32f77c05cc88..f8fb57d8a461 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.cpp
@@ -98,9 +98,11 @@ const MachineOperand &WebAssembly::getCalleeOp(const MachineInstr &MI) {
   }
 }
 
-MCSymbolWasm *WebAssembly::getOrCreateFunctionTableSymbol(
-    MCContext &Ctx, const WebAssemblySubtarget *Subtarget) {
-  StringRef Name = "__indirect_function_table";
+MCSymbolWasm *
+WebAssembly::getOrCreateFunctionTableSymbol(MCContext &Ctx,
+                                            const StringRef &Name) {
+  // FIXME: Duplicates functionality from
+  // MC/WasmObjectWriter::recordRelocation.
   MCSymbolWasm *Sym = cast_or_null<MCSymbolWasm>(Ctx.lookupSymbol(Name));
   if (Sym) {
     if (!Sym->isFunctionTable())
@@ -111,9 +113,6 @@ MCSymbolWasm *WebAssembly::getOrCreateFunctionTableSymbol(
     // The default function table is synthesized by the linker.
     Sym->setUndefined();
   }
-  // MVP object files can't have symtab entries for tables.
-  if (!Subtarget->hasReferenceTypes())
-    Sym->setOmitFromLinkingSection();
   return Sym;
 }
 

diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h b/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h
index 1398d7d9dfc2..41ad7869cf46 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h
@@ -24,7 +24,6 @@ class MCContext;
 class MCSymbolWasm;
 class StringRef;
 class WebAssemblyFunctionInfo;
-class WebAssemblySubtarget;
 
 namespace WebAssembly {
 
@@ -42,11 +41,10 @@ extern const char *const PersonalityWrapperFn;
 /// instruction.
 const MachineOperand &getCalleeOp(const MachineInstr &MI);
 
-/// Returns the __indirect_function_table, for use in call_indirect and in
-/// function bitcasts.
-MCSymbolWasm *
-getOrCreateFunctionTableSymbol(MCContext &Ctx,
-                               const WebAssemblySubtarget *Subtarget);
+/// Returns the operand number of a callee, assuming the argument is a call
+/// instruction.
+MCSymbolWasm *getOrCreateFunctionTableSymbol(MCContext &Ctx,
+                                             const StringRef &Name);
 
 /// Find a catch instruction from an EH pad. Returns null if no catch
 /// instruction found or the catch is in an invalid location.

diff  --git a/llvm/test/CodeGen/WebAssembly/function-pointer64.ll b/llvm/test/CodeGen/WebAssembly/function-pointer64.ll
index dd739d67e14c..6b279cfb6ec0 100644
--- a/llvm/test/CodeGen/WebAssembly/function-pointer64.ll
+++ b/llvm/test/CodeGen/WebAssembly/function-pointer64.ll
@@ -1,5 +1,4 @@
 ; RUN: llc < %s -asm-verbose=false -O2 | FileCheck %s
-; RUN: llc < %s -asm-verbose=false -mattr=+reference-types -O2 | FileCheck --check-prefix=REF %s
 ; RUN: llc < %s -asm-verbose=false -O2 --filetype=obj | obj2yaml | FileCheck --check-prefix=YAML %s
 
 ; This tests pointer features that may codegen 
diff erently in wasm64.
@@ -35,16 +34,14 @@ entry:
 ; CHECK-NEXT: i32.const 1
 ; CHECK-NEXT: local.get 0
 ; CHECK-NEXT: i32.wrap_i64
-; CHECK-NEXT: call_indirect (i32) -> (), 0
-; REF:        call_indirect (i32) -> (), __indirect_function_table
+; CHECK-NEXT: call_indirect (i32) -> ()
 
 ; CHECK:      .functype test () -> ()
 ; CHECK-NEXT: i64.const bar
 ; CHECK-NEXT: call foo
 
 
-; Check we're emitting a 64-bit relocs for the call_indirect, the
-; `i64.const bar` reference in code, and the global.
+; Check we're emitting a 64-bit reloc for `i64.const bar` and the global.
 
 ; YAML:      Memory:
 ; YAML-NEXT:   Flags:   [ IS_64 ]
@@ -54,9 +51,6 @@ entry:
 ; YAML:      - Type:   R_WASM_TABLE_INDEX_SLEB64
 ; YAML-NEXT:   Index:  0
 ; YAML-NEXT:   Offset: 0x16
-; YAML:      - Type:   R_WASM_TABLE_INDEX_SLEB64
-; YAML-NEXT:   Index:  0
-; YAML-NEXT:   Offset: 0x29
 
 ; YAML:      - Type:   DATA
 ; YAML:      - Type:   R_WASM_TABLE_INDEX_I64

diff  --git a/llvm/test/CodeGen/WebAssembly/multivalue.ll b/llvm/test/CodeGen/WebAssembly/multivalue.ll
index a57e2cf7fddf..d5dfcacb6a2b 100644
--- a/llvm/test/CodeGen/WebAssembly/multivalue.ll
+++ b/llvm/test/CodeGen/WebAssembly/multivalue.ll
@@ -1,5 +1,4 @@
 ; RUN: llc < %s -asm-verbose=false -verify-machineinstrs -mattr=+multivalue,+tail-call | FileCheck %s
-; RUN: llc < %s -asm-verbose=false -verify-machineinstrs -mattr=+reference-types,+multivalue,+tail-call | FileCheck --check-prefix REF %s
 ; RUN: llc < %s -asm-verbose=false -verify-machineinstrs -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -mattr=+multivalue,+tail-call | FileCheck %s --check-prefix REGS
 ; RUN: llc < %s --filetype=obj -mattr=+multivalue,+tail-call | obj2yaml | FileCheck %s --check-prefix OBJ
 
@@ -58,8 +57,7 @@ define %pair @pair_call_return() {
 ; CHECK-LABEL: pair_call_indirect:
 ; CHECK-NEXT: .functype pair_call_indirect (i32) -> (i32, i64)
 ; CHECK-NEXT: local.get 0{{$}}
-; CHECK-NEXT: call_indirect () -> (i32, i64), 0{{$}}
-; REF:        call_indirect () -> (i32, i64), __indirect_function_table{{$}}
+; CHECK-NEXT: call_indirect () -> (i32, i64){{$}}
 ; CHECK-NEXT: end_function{{$}}
 ; REGS: call_indirect $push{{[0-9]+}}=, $push{{[0-9]+}}=, $0{{$}}
 define %pair @pair_call_indirect(%pair()* %f) {

diff  --git a/llvm/test/MC/WebAssembly/basic-assembly.s b/llvm/test/MC/WebAssembly/basic-assembly.s
index dcfd9addb061..5da08d6781ab 100644
--- a/llvm/test/MC/WebAssembly/basic-assembly.s
+++ b/llvm/test/MC/WebAssembly/basic-assembly.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+reference-types,atomics,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | FileCheck %s
+# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+atomics,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | FileCheck %s
 # Check that it converts to .o without errors, but don't check any output:
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj -mattr=+reference-types,+atomics,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling -o %t.o < %s
+# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj -mattr=+atomics,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling -o %t.o < %s
 
 
 empty_func:
@@ -156,7 +156,7 @@ empty_fref_table:
 # CHECK-NEXT:      i64.const   1234
 # CHECK-NEXT:      call        something2
 # CHECK-NEXT:      i32.const   0
-# CHECK-NEXT:      call_indirect (i32, f64) -> (), __indirect_function_table
+# CHECK-NEXT:      call_indirect (i32, f64) -> ()
 # CHECK-NEXT:      i32.const   1
 # CHECK-NEXT:      i32.add
 # CHECK-NEXT:      local.tee   0

diff  --git a/llvm/test/MC/WebAssembly/call-indirect-relocs.s b/llvm/test/MC/WebAssembly/call-indirect-relocs.s
deleted file mode 100644
index 4244fbf3abea..000000000000
--- a/llvm/test/MC/WebAssembly/call-indirect-relocs.s
+++ /dev/null
@@ -1,83 +0,0 @@
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+reference-types < %s | FileCheck --check-prefix=CHECK %s
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+reference-types -filetype=obj < %s | obj2yaml | FileCheck -check-prefix=BIN %s
-
-test0:
-    .functype   test0 () -> ()
-    i32.const 42
-    f64.const 2.5
-    i32.const   0
-    call_indirect (i32, f64) -> (), empty_fref_table
-    end_function
-
-.tabletype empty_fref_table, funcref
-empty_fref_table:
-
-
-# CHECK:           .text
-# CHECK-LABEL: test0:
-# CHECK-NEXT:      .functype   test0 () -> ()
-# CHECK-NEXT:      i32.const   42
-# CHECK-NEXT:      f64.const   0x1.4p1
-# CHECK-NEXT:      i32.const   0
-# CHECK-NEXT:      call_indirect (i32, f64) -> (), empty_fref_table
-# CHECK-NEXT:      end_function
-
-# CHECK:           .tabletype empty_fref_table, funcref
-# CHECK: empty_fref_table:
-
-# BIN: --- !WASM
-# BIN-NEXT: FileHeader:
-# BIN-NEXT:   Version:         0x1
-# BIN-NEXT: Sections:
-# BIN-NEXT:   - Type:            TYPE
-# BIN-NEXT:     Signatures:
-# BIN-NEXT:       - Index:           0
-# BIN-NEXT:         ParamTypes:      []
-# BIN-NEXT:         ReturnTypes:     []
-# BIN-NEXT:       - Index:           1
-# BIN-NEXT:         ParamTypes:
-# BIN-NEXT:           - I32
-# BIN-NEXT:           - F64
-# BIN-NEXT:         ReturnTypes:     []
-# BIN-NEXT:   - Type:            IMPORT
-# BIN-NEXT:     Imports:
-# BIN-NEXT:       - Module:          env
-# BIN-NEXT:         Field:           __linear_memory
-# BIN-NEXT:         Kind:            MEMORY
-# BIN-NEXT:         Memory:
-# BIN-NEXT:           Initial:         0x0
-# BIN-NEXT:   - Type:            FUNCTION
-# BIN-NEXT:     FunctionTypes:   [ 0 ]
-# BIN-NEXT:   - Type:            TABLE
-# BIN-NEXT:     Tables:
-# BIN-NEXT:       - Index:           0
-# BIN-NEXT:         ElemType:        FUNCREF
-# BIN-NEXT:         Limits:
-# BIN-NEXT:           Initial:         0x0
-# BIN-NEXT:   - Type:            CODE
-# BIN-NEXT:     Relocations:
-# BIN-NEXT:       - Type:            R_WASM_TYPE_INDEX_LEB
-# BIN-NEXT:         Index:           1
-# BIN-NEXT:         Offset:          0x11
-# BIN-NEXT:       - Type:            R_WASM_TABLE_NUMBER_LEB
-# BIN-NEXT:         Index:           1
-# BIN-NEXT:         Offset:          0x16
-# BIN-NEXT:     Functions:
-# BIN-NEXT:       - Index:           0
-# BIN-NEXT:         Locals:          []
-# BIN-NEXT:         Body:            412A440000000000000440410011818080800080808080000B
-# BIN-NEXT:   - Type:            CUSTOM
-# BIN-NEXT:     Name:            linking
-# BIN-NEXT:     Version:         2
-# BIN-NEXT:     SymbolTable:
-# BIN-NEXT:       - Index:           0
-# BIN-NEXT:         Kind:            FUNCTION
-# BIN-NEXT:         Name:            test0
-# BIN-NEXT:         Flags:           [ BINDING_LOCAL ]
-# BIN-NEXT:         Function:        0
-# BIN-NEXT:       - Index:           1
-# BIN-NEXT:         Kind:            TABLE
-# BIN-NEXT:         Name:            empty_fref_table
-# BIN-NEXT:         Flags:           [ BINDING_LOCAL ]
-# BIN-NEXT:         Table:           0
-# BIN-NEXT: ...

diff  --git a/llvm/test/MC/WebAssembly/function-alias.ll b/llvm/test/MC/WebAssembly/function-alias.ll
index 83923475fae7..ec571083344b 100644
--- a/llvm/test/MC/WebAssembly/function-alias.ll
+++ b/llvm/test/MC/WebAssembly/function-alias.ll
@@ -1,5 +1,4 @@
 ; RUN: llc -filetype=obj %s -o - | llvm-readobj --symbols - | FileCheck %s
-; RUN: llc -filetype=obj %s -mattr=+reference-types -o - | llvm-readobj --symbols - | FileCheck --check-prefix=REF %s
 
 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
 target triple = "wasm32-unknown-unknown-wasm"
@@ -43,44 +42,3 @@ define i8* @func() {
 ; CHECK-NEXT:     ElementIndex: 0x0
 ; CHECK-NEXT:   }
 ; CHECK-NEXT: ]
-
-; REF:      Symbols [
-; REF-NEXT:   Symbol {
-; REF-NEXT:     Name: func
-; REF-NEXT:     Type: FUNCTION (0x0)
-; REF-NEXT:     Flags [ (0x0)
-; REF-NEXT:     ]
-; REF-NEXT:     ElementIndex: 0x0
-; REF-NEXT:   }
-; REF-NEXT:   Symbol {
-; REF-NEXT:     Name: bar2
-; REF-NEXT:     Type: FUNCTION (0x0)
-; REF-NEXT:     Flags [ (0x0)
-; REF-NEXT:     ]
-; REF-NEXT:     ElementIndex: 0x0
-; REF-NEXT:   }
-; REF-NEXT:   Symbol {
-; REF-NEXT:     Name: foo
-; REF-NEXT:     Type: FUNCTION (0x0)
-; REF-NEXT:     Flags [ (0x0)
-; REF-NEXT:     ]
-; REF-NEXT:     ElementIndex: 0x0
-; REF-NEXT:   }
-; REF-NEXT:   Symbol {
-; REF-NEXT:     Name: bar
-; REF-NEXT:     Type: FUNCTION (0x0)
-; REF-NEXT:     Flags [ (0x0)
-; REF-NEXT:     ]
-; REF-NEXT:     ElementIndex: 0x0
-; REF-NEXT:   }
-; REF-NEXT:   Symbol {
-; REF-NEXT:     Name: __indirect_function_table
-; REF-NEXT:     Type: TABLE (0x5)
-; REF-NEXT:     Flags [ (0x90)
-; REF-NEXT:       NO_STRIP (0x80)
-; REF-NEXT:       UNDEFINED (0x10)
-; REF-NEXT:     ]
-; REF-NEXT:     ImportModule: env
-; REF-NEXT:     ElementIndex: 0x0
-; REF-NEXT:   }
-; REF-NEXT: ]

diff  --git a/llvm/test/MC/WebAssembly/reloc-code.ll b/llvm/test/MC/WebAssembly/reloc-code.ll
index e80fbcf80cd3..0aafeabec5ca 100644
--- a/llvm/test/MC/WebAssembly/reloc-code.ll
+++ b/llvm/test/MC/WebAssembly/reloc-code.ll
@@ -1,5 +1,4 @@
 ; RUN: llc -filetype=obj %s -o - | llvm-readobj -r --expand-relocs - | FileCheck %s
-; RUN: llc -filetype=obj -mattr=+reference-types %s -o - | llvm-readobj -r --expand-relocs - | FileCheck --check-prefix=REF %s
 
 target triple = "wasm32-unknown-unknown"
 
@@ -60,51 +59,3 @@ entry:
 ; CHECK-NEXT:     }
 ; CHECK-NEXT:   }
 ; CHECK-NEXT: ]
-
-; REF: Format: WASM
-; REF: Relocations [
-; REF-NEXT:   Section (5) CODE {
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_MEMORY_ADDR_LEB (3)
-; REF-NEXT:       Offset: 0x9
-; REF-NEXT:       Symbol: b
-; REF-NEXT:       Addend: 0
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_MEMORY_ADDR_LEB (3)
-; REF-NEXT:       Offset: 0x14
-; REF-NEXT:       Symbol: a
-; REF-NEXT:       Addend: 0
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_TYPE_INDEX_LEB (6)
-; REF-NEXT:       Offset: 0x1A
-; REF-NEXT:       Index: 0x1
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_TABLE_NUMBER_LEB (20)
-; REF-NEXT:       Offset: 0x1F
-; REF-NEXT:       Symbol: __indirect_function_table
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_TYPE_INDEX_LEB (6)
-; REF-NEXT:       Offset: 0x28
-; REF-NEXT:       Index: 0x0
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_TABLE_NUMBER_LEB (20)
-; REF-NEXT:       Offset: 0x2D
-; REF-NEXT:       Symbol: __indirect_function_table
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_FUNCTION_INDEX_LEB (0)
-; REF-NEXT:       Offset: 0x35
-; REF-NEXT:       Symbol: c
-; REF-NEXT:     }
-; REF-NEXT:     Relocation {
-; REF-NEXT:       Type: R_WASM_FUNCTION_INDEX_LEB (0)
-; REF-NEXT:       Offset: 0x3C
-; REF-NEXT:       Symbol: d
-; REF-NEXT:     }
-; REF-NEXT:   }
-; REF-NEXT: ]

diff  --git a/llvm/test/MC/WebAssembly/reloc-pic.s b/llvm/test/MC/WebAssembly/reloc-pic.s
index 477b2cb8ac5e..b7995ebf97fa 100644
--- a/llvm/test/MC/WebAssembly/reloc-pic.s
+++ b/llvm/test/MC/WebAssembly/reloc-pic.s
@@ -1,5 +1,4 @@
 # RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj < %s | obj2yaml | FileCheck %s
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+reference-types -filetype=obj < %s | obj2yaml | FileCheck --check-prefix=REF %s
 
 # Verify that @GOT relocation entryes result in R_WASM_GLOBAL_INDEX_LEB against
 # against the corrsponding function or data symbol and that the corresponding
@@ -191,11 +190,6 @@ hidden_func:
 # CHECK-NEXT:         Name:            hidden_func
 # CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
 # CHECK-NEXT:         Function:        5
-# REF:              - Index:           10
-# REF-NEXT:           Kind:            TABLE
-# REF-NEXT:           Name:            __indirect_function_table
-# REF-NEXT:           Flags:           [ UNDEFINED, NO_STRIP ]
-# REF-NEXT:           Table:           0
 # CHECK-NEXT:     SegmentInfo:
 # CHECK-NEXT:       - Index:           0
 # CHECK-NEXT:         Name:            .rodata.hidden_data

diff  --git a/llvm/test/MC/WebAssembly/tail-call-encodings.s b/llvm/test/MC/WebAssembly/tail-call-encodings.s
index 20bfb2e84a24..405e6337f5fa 100644
--- a/llvm/test/MC/WebAssembly/tail-call-encodings.s
+++ b/llvm/test/MC/WebAssembly/tail-call-encodings.s
@@ -1,5 +1,4 @@
 # RUN: llvm-mc -show-encoding -triple=wasm32-unknown-unknown -mattr=+tail-call < %s | FileCheck %s
-# RUN: llvm-mc -show-encoding -triple=wasm32-unknown-unknown -mattr=+reference-types,+tail-call < %s | FileCheck --check-prefix=REF %s
 
 bar1:
     .functype bar1 () -> ()
@@ -17,8 +16,7 @@ foo1:
 foo2:
     .functype foo2 () -> ()
 
-    # REF: return_call_indirect (i32) -> (i32), __indirect_function_table # encoding: [0x13,
-    # CHECK: return_call_indirect (i32) -> (i32), 0 # encoding: [0x13,
+    # CHECK: return_call_indirect (i32) -> (i32) # encoding: [0x13,
     # CHECK-NEXT: fixup A - offset: 1, value: .Ltypeindex0 at TYPEINDEX, kind: fixup_uleb128_i32
     return_call_indirect (i32) -> (i32)
 

diff  --git a/llvm/test/MC/WebAssembly/type-index.s b/llvm/test/MC/WebAssembly/type-index.s
index dd6581b826f5..298e5e2f9de3 100644
--- a/llvm/test/MC/WebAssembly/type-index.s
+++ b/llvm/test/MC/WebAssembly/type-index.s
@@ -1,8 +1,8 @@
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+reference-types,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | FileCheck %s
+# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | FileCheck %s
 # Check that it converts to .o without errors:
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj -mattr=+reference-types,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | obj2yaml | FileCheck -check-prefix=BIN %s
+# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj -mattr=+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | obj2yaml | FileCheck -check-prefix=BIN %s
 
-# Minimal test for type indices and table references in call_indirect.
+# Minimal test for type indices in call_indirect.
 
 test0:
     .functype   test0 (i32) -> (i32)
@@ -53,13 +53,10 @@ test0:
 # BIN-NEXT:       - Type:            R_WASM_TYPE_INDEX_LEB
 # BIN-NEXT:         Index:           1
 # BIN-NEXT:         Offset:          0x4
-# BIN-NEXT:       - Type:            R_WASM_TABLE_NUMBER_LEB
-# BIN-NEXT:         Index:           1
-# BIN-NEXT:         Offset:          0x9
 # BIN-NEXT:     Functions:
 # BIN-NEXT:       - Index:           0
 # BIN-NEXT:         Locals:          []
-# BIN-NEXT:         Body:            11818080800080808080000B
+# BIN-NEXT:         Body:            118180808000000B
 # BIN-NEXT:   - Type:            CUSTOM
 # BIN-NEXT:     Name:            linking
 # BIN-NEXT:     Version:         2
@@ -69,9 +66,4 @@ test0:
 # BIN-NEXT:         Name:            test0
 # BIN-NEXT:         Flags:           [ BINDING_LOCAL ]
 # BIN-NEXT:         Function:        0
-# BIN-NEXT:       - Index:           1
-# BIN-NEXT:         Kind:            TABLE
-# BIN-NEXT:         Name:            __indirect_function_table
-# BIN-NEXT:         Flags:           [ UNDEFINED ]
-# BIN-NEXT:         Table:           0
 # BIN-NEXT: ...

diff  --git a/llvm/test/MC/WebAssembly/weak-alias.s b/llvm/test/MC/WebAssembly/weak-alias.s
index 48bfc0b7a58d..4590e0020382 100644
--- a/llvm/test/MC/WebAssembly/weak-alias.s
+++ b/llvm/test/MC/WebAssembly/weak-alias.s
@@ -1,5 +1,5 @@
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj < %s | obj2yaml | FileCheck --check-prefix=CHECK %s
-# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+reference-types -filetype=obj < %s | obj2yaml | FileCheck --check-prefix=REF %s
+# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj -o %t.o < %s
+# RUN: obj2yaml %t.o | FileCheck %s
 
 # 'foo_alias()' is weak alias of function 'foo()'
 # 'bar_alias' is weak alias of global variable 'bar'
@@ -78,7 +78,7 @@ alias_address:
 # CHECK:        - Type:            TYPE
 # CHECK-NEXT:     Signatures:
 # CHECK-NEXT:       - Index:           0
-# CHECK-NEXT:         ParamTypes:      []
+# CHECK-NEXT:         ParamTypes:
 # CHECK-NEXT:         ReturnTypes:
 # CHECK-NEXT:           - I32
 # CHECK-NEXT:   - Type:            IMPORT
@@ -128,19 +128,19 @@ alias_address:
 # CHECK-NEXT:         Offset:          0x37
 # CHECK-NEXT:     Functions:
 # CHECK-NEXT:       - Index:           0
-# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Locals:
 # CHECK-NEXT:         Body:            41000B
 # CHECK-NEXT:       - Index:           1
-# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Locals:
 # CHECK-NEXT:         Body:            1080808080000B
 # CHECK-NEXT:       - Index:           2
-# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Locals:
 # CHECK-NEXT:         Body:            1080808080000B
 # CHECK-NEXT:       - Index:           3
-# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Locals:
 # CHECK-NEXT:         Body:            410028028880808000118080808000000B
 # CHECK-NEXT:       - Index:           4
-# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Locals:
 # CHECK-NEXT:         Body:            410028029080808000118080808000000B
 # CHECK-NEXT:   - Type:            DATA
 # CHECK-NEXT:     Relocations:
@@ -231,195 +231,17 @@ alias_address:
 # CHECK-NEXT:       - Index:           0
 # CHECK-NEXT:         Name:            .data.bar
 # CHECK-NEXT:         Alignment:       3
-# CHECK-NEXT:         Flags:           [  ]
+# CHECK-NEXT:         Flags:           [ ]
 # CHECK-NEXT:       - Index:           1
 # CHECK-NEXT:         Name:            .data.direct_address
 # CHECK-NEXT:         Alignment:       3
-# CHECK-NEXT:         Flags:           [  ]
+# CHECK-NEXT:         Flags:           [ ]
 # CHECK-NEXT:       - Index:           2
 # CHECK-NEXT:         Name:            .data.alias_address
 # CHECK-NEXT:         Alignment:       3
-# CHECK-NEXT:         Flags:           [  ]
+# CHECK-NEXT:         Flags:           [ ]
 # CHECK-NEXT: ...
 
-# REF:        - Type:            TYPE
-# REF-NEXT:     Signatures:
-# REF-NEXT:       - Index:           0
-# REF-NEXT:         ParamTypes:      []
-# REF-NEXT:         ReturnTypes:
-# REF-NEXT:           - I32
-# REF-NEXT:   - Type:            IMPORT
-# REF-NEXT:     Imports:
-# REF-NEXT:       - Module:          env
-# REF-NEXT:         Field:           __linear_memory
-# REF-NEXT:         Kind:            MEMORY
-# REF-NEXT:         Memory:
-# REF-NEXT:           Initial:         0x1
-# REF-NEXT:       - Module:          env
-# REF-NEXT:         Field:           __indirect_function_table
-# REF-NEXT:         Kind:            TABLE
-# REF-NEXT:         Table:
-# REF-NEXT:           Index:           0
-# REF-NEXT:           ElemType:        FUNCREF
-# REF-NEXT:           Limits:
-# REF-NEXT:             Initial:         0x1
-# REF-NEXT:   - Type:            FUNCTION
-# REF-NEXT:     FunctionTypes:   [ 0, 0, 0, 0, 0 ]
-# REF-NEXT:   - Type:            ELEM
-# REF-NEXT:     Segments:
-# REF-NEXT:       - Offset:
-# REF-NEXT:           Opcode:          I32_CONST
-# REF-NEXT:           Value:           1
-# REF-NEXT:         Functions:       [ 0 ]
-# REF-NEXT:   - Type:            DATACOUNT
-# REF-NEXT:     Count:           3
-# REF-NEXT:   - Type:            CODE
-# REF-NEXT:     Relocations:
-# REF-NEXT:       - Type:            R_WASM_FUNCTION_INDEX_LEB
-# REF-NEXT:         Index:           0
-# REF-NEXT:         Offset:          0x9
-# REF-NEXT:       - Type:            R_WASM_FUNCTION_INDEX_LEB
-# REF-NEXT:         Index:           3
-# REF-NEXT:         Offset:          0x12
-# REF-NEXT:       - Type:            R_WASM_MEMORY_ADDR_LEB
-# REF-NEXT:         Index:           5
-# REF-NEXT:         Offset:          0x1E
-# REF-NEXT:       - Type:            R_WASM_TYPE_INDEX_LEB
-# REF-NEXT:         Index:           0
-# REF-NEXT:         Offset:          0x24
-# REF-NEXT:       - Type:            R_WASM_TABLE_NUMBER_LEB
-# REF-NEXT:         Index:           6
-# REF-NEXT:         Offset:          0x29
-# REF-NEXT:       - Type:            R_WASM_MEMORY_ADDR_LEB
-# REF-NEXT:         Index:           8
-# REF-NEXT:         Offset:          0x35
-# REF-NEXT:       - Type:            R_WASM_TYPE_INDEX_LEB
-# REF-NEXT:         Index:           0
-# REF-NEXT:         Offset:          0x3B
-# REF-NEXT:       - Type:            R_WASM_TABLE_NUMBER_LEB
-# REF-NEXT:         Index:           6
-# REF-NEXT:         Offset:          0x40
-# REF-NEXT:     Functions:
-# REF-NEXT:       - Index:           0
-# REF-NEXT:         Locals:          []
-# REF-NEXT:         Body:            41000B
-# REF-NEXT:       - Index:           1
-# REF-NEXT:         Locals:          []
-# REF-NEXT:         Body:            1080808080000B
-# REF-NEXT:       - Index:           2
-# REF-NEXT:         Locals:          []
-# REF-NEXT:         Body:            1080808080000B
-# REF-NEXT:       - Index:           3
-# REF-NEXT:         Locals:          []
-# REF-NEXT:         Body:            41002802888080800011808080800080808080000B
-# REF-NEXT:       - Index:           4
-# REF-NEXT:         Locals:          []
-# REF-NEXT:         Body:            41002802908080800011808080800080808080000B
-# REF-NEXT:   - Type:            DATA
-# REF-NEXT:     Relocations:
-# REF-NEXT:       - Type:            R_WASM_TABLE_INDEX_I32
-# REF-NEXT:         Index:           0
-# REF-NEXT:         Offset:          0x13
-# REF-NEXT:       - Type:            R_WASM_TABLE_INDEX_I32
-# REF-NEXT:         Index:           3
-# REF-NEXT:         Offset:          0x20
-# REF-NEXT:     Segments:
-# REF-NEXT:       - SectionOffset:   6
-# REF-NEXT:         InitFlags:       0
-# REF-NEXT:         Offset:
-# REF-NEXT:           Opcode:          I32_CONST
-# REF-NEXT:           Value:           0
-# REF-NEXT:         Content:         '0700000000000000'
-# REF-NEXT:       - SectionOffset:   19
-# REF-NEXT:         InitFlags:       0
-# REF-NEXT:         Offset:
-# REF-NEXT:           Opcode:          I32_CONST
-# REF-NEXT:           Value:           8
-# REF-NEXT:         Content:         '0100000000000000'
-# REF-NEXT:       - SectionOffset:   32
-# REF-NEXT:         InitFlags:       0
-# REF-NEXT:         Offset:
-# REF-NEXT:           Opcode:          I32_CONST
-# REF-NEXT:           Value:           16
-# REF-NEXT:         Content:         '0100000000000000'
-# REF-NEXT:   - Type:            CUSTOM
-# REF-NEXT:     Name:            linking
-# REF-NEXT:     Version:         2
-# REF-NEXT:     SymbolTable:
-# REF-NEXT:       - Index:           0
-# REF-NEXT:         Kind:            FUNCTION
-# REF-NEXT:         Name:            foo
-# REF-NEXT:         Flags:           [ VISIBILITY_HIDDEN ]
-# REF-NEXT:         Function:        0
-# REF-NEXT:       - Index:           1
-# REF-NEXT:         Kind:            FUNCTION
-# REF-NEXT:         Name:            call_direct
-# REF-NEXT:         Flags:           [ VISIBILITY_HIDDEN ]
-# REF-NEXT:         Function:        1
-# REF-NEXT:       - Index:           2
-# REF-NEXT:         Kind:            FUNCTION
-# REF-NEXT:         Name:            call_alias
-# REF-NEXT:         Flags:           [ VISIBILITY_HIDDEN ]
-# REF-NEXT:         Function:        2
-# REF-NEXT:       - Index:           3
-# REF-NEXT:         Kind:            FUNCTION
-# REF-NEXT:         Name:            foo_alias
-# REF-NEXT:         Flags:           [ BINDING_WEAK, VISIBILITY_HIDDEN, NO_STRIP ]
-# REF-NEXT:         Function:        0
-# REF-NEXT:       - Index:           4
-# REF-NEXT:         Kind:            FUNCTION
-# REF-NEXT:         Name:            call_direct_ptr
-# REF-NEXT:         Flags:           [ VISIBILITY_HIDDEN ]
-# REF-NEXT:         Function:        3
-# REF-NEXT:       - Index:           5
-# REF-NEXT:         Kind:            DATA
-# REF-NEXT:         Name:            direct_address
-# REF-NEXT:         Flags:           [  ]
-# REF-NEXT:         Segment:         1
-# REF-NEXT:         Size:            4
-# REF-NEXT:       - Index:           6
-# REF-NEXT:         Kind:            TABLE
-# REF-NEXT:         Name:            __indirect_function_table
-# REF-NEXT:         Flags:           [ UNDEFINED, NO_STRIP ]
-# REF-NEXT:         Table:           0
-# REF-NEXT:       - Index:           7
-# REF-NEXT:         Kind:            FUNCTION
-# REF-NEXT:         Name:            call_alias_ptr
-# REF-NEXT:         Flags:           [ VISIBILITY_HIDDEN ]
-# REF-NEXT:         Function:        4
-# REF-NEXT:       - Index:           8
-# REF-NEXT:         Kind:            DATA
-# REF-NEXT:         Name:            alias_address
-# REF-NEXT:         Flags:           [  ]
-# REF-NEXT:         Segment:         2
-# REF-NEXT:         Size:            4
-# REF-NEXT:       - Index:           9
-# REF-NEXT:         Kind:            DATA
-# REF-NEXT:         Name:            bar
-# REF-NEXT:         Flags:           [  ]
-# REF-NEXT:         Segment:         0
-# REF-NEXT:         Size:            4
-# REF-NEXT:       - Index:           10
-# REF-NEXT:         Kind:            DATA
-# REF-NEXT:         Name:            bar_alias
-# REF-NEXT:         Flags:           [ BINDING_WEAK, VISIBILITY_HIDDEN, NO_STRIP ]
-# REF-NEXT:         Segment:         0
-# REF-NEXT:         Size:            4
-# REF-NEXT:     SegmentInfo:
-# REF-NEXT:       - Index:           0
-# REF-NEXT:         Name:            .data.bar
-# REF-NEXT:         Alignment:       3
-# REF-NEXT:         Flags:           [  ]
-# REF-NEXT:       - Index:           1
-# REF-NEXT:         Name:            .data.direct_address
-# REF-NEXT:         Alignment:       3
-# REF-NEXT:         Flags:           [  ]
-# REF-NEXT:       - Index:           2
-# REF-NEXT:         Name:            .data.alias_address
-# REF-NEXT:         Alignment:       3
-# REF-NEXT:         Flags:           [  ]
-# REF-NEXT: ...
-
 # CHECK-SYMS: SYMBOL TABLE:
 # CHECK-SYMS-NEXT: 00000001 g     F CODE	.hidden foo
 # CHECK-SYMS-NEXT: 00000006 g     F CODE	.hidden call_direct


        


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