Revert "[clang][wip] Add nondeterministic initialization at alloca generation"

This reverts commit e0f96d5.

Author: jmciver

clang/lib/CodeGen/CGExpr.cpp

@@ -41,7 +41,6 @@
 #include "llvm/IR/MatrixBuilder.h"
 #include "llvm/Passes/OptimizationLevel.h"
 #include "llvm/Support/ConvertUTF.h"
-#include "llvm/Support/Debug.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/SaveAndRestore.h"
@@ -51,8 +50,6 @@
 #include <optional>
 #include <string>
 
-#define DEBUG_TYPE "CGExpr"
-
 using namespace clang;
 using namespace CodeGen;
 
@@ -118,21 +115,12 @@ RawAddress CodeGenFunction::CreateTempAlloca(llvm::Type *Ty, CharUnits Align,
 llvm::AllocaInst *CodeGenFunction::CreateTempAlloca(llvm::Type *Ty,
                                                     const Twine &Name,
                                                     llvm::Value *ArraySize) {
-  LLVM_DEBUG(llvm::dbgs() << "DEBUG: " << Name << "\n";);
   llvm::AllocaInst *Alloca;
   if (ArraySize)
     Alloca = Builder.CreateAlloca(Ty, ArraySize, Name);
-  else {
+  else
     Alloca = new llvm::AllocaInst(Ty, CGM.getDataLayout().getAllocaAddrSpace(),
                                   ArraySize, Name, AllocaInsertPt);
-    if (Ty->isIntegerTy()) {
-      llvm::IRBuilder<> StoreFreezePoisonBuilder(Alloca->getContext());
-      StoreFreezePoisonBuilder.SetInsertPoint(getPostAllocaInsertPoint());
-      auto FreezePoison = StoreFreezePoisonBuilder.CreateFreeze(
-          llvm::PoisonValue::get(Ty), "freeze");
-      StoreFreezePoisonBuilder.CreateStore(FreezePoison, Alloca);
-    }
-  }
   if (Allocas) {
     Allocas->Add(Alloca);
   }