Revert "[X86] Support the "ms-hotpatch" attribute."

This reverts commit r278048. Something changed between the last time I
built this--it takes awhile on my ridiculously slow and ancient
computer--and now that broke this.

llvm-svn: 278053

1 files changed, 16 insertions, 14 deletions

diff --git a/llvm/lib/CodeGen/PatchableFunction.cpp b/llvm/lib/CodeGen/PatchableFunction.cpp
index c94307d..32468c9 100644
--- a/llvm/lib/CodeGen/PatchableFunction.cpp
+++ b/llvm/lib/CodeGen/PatchableFunction.cpp
@@ -13,11 +13,12 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/CodeGen/Passes.h"
-#include "llvm/Analysis/TargetTransformInfo.h"
-#include "llvm/CodeGen/Analysis.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
 
 using namespace llvm;
 
@@ -28,9 +29,8 @@ struct PatchableFunction : public MachineFunctionPass {
     initializePatchableFunctionPass(*PassRegistry::getPassRegistry());
   }
 
-  void getAnalysisUsage(AnalysisUsage &AU) const override;
   bool runOnMachineFunction(MachineFunction &F) override;
-  MachineFunctionProperties getRequiredProperties() const override {
+   MachineFunctionProperties getRequiredProperties() const override {
     return MachineFunctionProperties().set(
         MachineFunctionProperties::Property::AllVRegsAllocated);
   }
@@ -53,29 +53,31 @@ static bool doesNotGeneratecode(const MachineInstr &MI) {
   }
 }
 
-void PatchableFunction::getAnalysisUsage(AnalysisUsage &AU) const {
-  MachineFunctionPass::getAnalysisUsage(AU);
-  AU.addRequired<TargetTransformInfoWrapperPass>();
-}
-
 bool PatchableFunction::runOnMachineFunction(MachineFunction &MF) {
   if (!MF.getFunction()->hasFnAttribute("patchable-function"))
     return false;
 
+#ifndef NDEBUG
   Attribute PatchAttr = MF.getFunction()->getFnAttribute("patchable-function");
   StringRef PatchType = PatchAttr.getValueAsString();
-  assert((PatchType == "prologue-short-redirect" ||
-          PatchType == "ms-hotpatch") && "Only possibilities today!");
+  assert(PatchType == "prologue-short-redirect" && "Only possibility today!");
+#endif
 
   auto &FirstMBB = *MF.begin();
   MachineBasicBlock::iterator FirstActualI = FirstMBB.begin();
   for (; doesNotGeneratecode(*FirstActualI); ++FirstActualI)
     assert(FirstActualI != FirstMBB.end());
 
-  const TargetTransformInfo &TTI =
-      getAnalysis<TargetTransformInfoWrapperPass>().getTTI(*MF.getFunction());
-  TTI.emitPatchableOp(PatchType, FirstMBB, FirstActualI);
+  auto *TII = MF.getSubtarget().getInstrInfo();
+  auto MIB = BuildMI(FirstMBB, FirstActualI, FirstActualI->getDebugLoc(),
+                     TII->get(TargetOpcode::PATCHABLE_OP))
+                 .addImm(2)
+                 .addImm(FirstActualI->getOpcode());
+
+  for (auto &MO : FirstActualI->operands())
+    MIB.addOperand(MO);
 
+  FirstActualI->eraseFromParent();
   MF.ensureAlignment(4);
   return true;
 }