Revert "[clang][WebAssembly] Initial support for reference type externref in clang"

Very likely breaks stage 3 of msan build bot.
Good: 764c88a50ac76a2df2d051a0eb5badc6867aabb6 https://lab.llvm.org/buildbot/#/builders/74/builds/17058
Looks unrelated: 48b5a06dfcab12cf093a1a3df42cb5b684e2be4c
Bad: 48b5a06dfcab12cf093a1a3df42cb5b684e2be4c https://lab.llvm.org/buildbot/#/builders/74/builds/17059

This reverts commit eb66833d19573df97034a81279eda31b8d19815b.

1 files changed, 0 insertions, 9 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index bac28cc1..630c786 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -16,7 +16,6 @@
 #include "TargetInfo/WebAssemblyTargetInfo.h"
 #include "Utils/WebAssemblyUtilities.h"
 #include "WebAssembly.h"
-#include "WebAssemblyISelLowering.h"
 #include "WebAssemblyMachineFunctionInfo.h"
 #include "WebAssemblyTargetObjectFile.h"
 #include "WebAssemblyTargetTransformInfo.h"
@@ -465,14 +464,6 @@ void WebAssemblyPassConfig::addIRPasses() {
 }
 
 void WebAssemblyPassConfig::addISelPrepare() {
-  WebAssemblyTargetMachine *WasmTM = static_cast<WebAssemblyTargetMachine*>(TM);
-  const WebAssemblySubtarget *Subtarget = WasmTM
-            ->getSubtargetImpl(std::string(WasmTM->getTargetCPU()),
-                               std::string(WasmTM->getTargetFeatureString()));
-  if(Subtarget->hasReferenceTypes()) {
-    // We need to remove allocas for reference types
-    addPass(createPromoteMemoryToRegisterPass(true));
-  }
   // Lower atomics and TLS if necessary
   addPass(new CoalesceFeaturesAndStripAtomics(&getWebAssemblyTargetMachine()));