From fc61b6f111af79662baf273c40593a1e8f4dc719 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Fri, 7 Jun 2013 20:42:15 +0000
Subject: [PATCH] Don't cache the instruction and register info from the
 TargetMachine, because the internals of TargetMachine could change.

No functionality change intended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183567 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/SystemZ/SystemZInstrInfo.cpp    | 2 +-
 lib/Target/SystemZ/SystemZLongBranch.cpp   | 4 ++--
 lib/Target/SystemZ/SystemZRegisterInfo.cpp | 9 ++++++---
 lib/Target/SystemZ/SystemZRegisterInfo.h   | 3 +--
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/lib/Target/SystemZ/SystemZInstrInfo.cpp b/lib/Target/SystemZ/SystemZInstrInfo.cpp
index 5339bf14ac7..0d304323547 100644
--- a/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -23,7 +23,7 @@ using namespace llvm;
 
 SystemZInstrInfo::SystemZInstrInfo(SystemZTargetMachine &tm)
   : SystemZGenInstrInfo(SystemZ::ADJCALLSTACKDOWN, SystemZ::ADJCALLSTACKUP),
-    RI(tm, *this) {
+    RI(tm) {
 }
 
 // MI is a 128-bit load or store.  Split it into two 64-bit loads or stores,
diff --git a/lib/Target/SystemZ/SystemZLongBranch.cpp b/lib/Target/SystemZ/SystemZLongBranch.cpp
index 24afb072ae8..2cb5823068d 100644
--- a/lib/Target/SystemZ/SystemZLongBranch.cpp
+++ b/lib/Target/SystemZ/SystemZLongBranch.cpp
@@ -133,8 +133,7 @@ namespace {
   public:
     static char ID;
     SystemZLongBranch(const SystemZTargetMachine &tm)
-      : MachineFunctionPass(ID),
-        TII(static_cast<const SystemZInstrInfo *>(tm.getInstrInfo())) {}
+      : MachineFunctionPass(ID), TII(0) {}
 
     virtual const char *getPassName() const {
       return "SystemZ Long Branch";
@@ -402,6 +401,7 @@ void SystemZLongBranch::relaxBranches() {
 }
 
 bool SystemZLongBranch::runOnMachineFunction(MachineFunction &F) {
+  TII = static_cast<const SystemZInstrInfo *>(F.getTarget().getInstrInfo());
   MF = &F;
   uint64_t Size = initMBBInfo();
   if (Size <= MaxForwardRange || !mustRelaxABranch())
diff --git a/lib/Target/SystemZ/SystemZRegisterInfo.cpp b/lib/Target/SystemZ/SystemZRegisterInfo.cpp
index a0ae7ed0001..c695bb3dad1 100644
--- a/lib/Target/SystemZ/SystemZRegisterInfo.cpp
+++ b/lib/Target/SystemZ/SystemZRegisterInfo.cpp
@@ -17,9 +17,8 @@
 
 using namespace llvm;
 
-SystemZRegisterInfo::SystemZRegisterInfo(SystemZTargetMachine &tm,
-                                         const SystemZInstrInfo &tii)
-  : SystemZGenRegisterInfo(SystemZ::R14D), TM(tm), TII(tii) {}
+SystemZRegisterInfo::SystemZRegisterInfo(SystemZTargetMachine &tm)
+  : SystemZGenRegisterInfo(SystemZ::R14D), TM(tm) {}
 
 const uint16_t*
 SystemZRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
@@ -61,6 +60,8 @@ SystemZRegisterInfo::saveScavengerRegister(MachineBasicBlock &MBB,
 					   const TargetRegisterClass *RC,
 					   unsigned Reg) const {
   MachineFunction &MF = *MBB.getParent();
+  const SystemZInstrInfo &TII =
+    *static_cast<const SystemZInstrInfo*>(TM.getInstrInfo());
   const SystemZFrameLowering *TFI =
     static_cast<const SystemZFrameLowering *>(TM.getFrameLowering());
   unsigned Base = getFrameRegister(MF);
@@ -86,6 +87,8 @@ SystemZRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator MI,
 
   MachineBasicBlock &MBB = *MI->getParent();
   MachineFunction &MF = *MBB.getParent();
+  const SystemZInstrInfo &TII =
+    *static_cast<const SystemZInstrInfo*>(TM.getInstrInfo());
   const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
   DebugLoc DL = MI->getDebugLoc();
 
diff --git a/lib/Target/SystemZ/SystemZRegisterInfo.h b/lib/Target/SystemZ/SystemZRegisterInfo.h
index 91a70dea29c..047cb4a6323 100644
--- a/lib/Target/SystemZ/SystemZRegisterInfo.h
+++ b/lib/Target/SystemZ/SystemZRegisterInfo.h
@@ -35,10 +35,9 @@ class SystemZInstrInfo;
 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
 private:
   SystemZTargetMachine &TM;
-  const SystemZInstrInfo &TII;
 
 public:
-  SystemZRegisterInfo(SystemZTargetMachine &tm, const SystemZInstrInfo &tii);
+  SystemZRegisterInfo(SystemZTargetMachine &tm);
 
   // Override TargetRegisterInfo.h.
   virtual bool requiresRegisterScavenging(const MachineFunction &MF) const
-- 
2.34.1