From fc6de428c8ab10330e1b00c6541503cfd98a9cca Mon Sep 17 00:00:00 2001
From: Eric Christopher <echristo@gmail.com>
Date: Tue, 5 Aug 2014 02:39:49 +0000
Subject: Have MachineFunction cache a pointer to the subtarget to make lookups
 shorter/easier and have the DAG use that to do the same lookup. This can be
 used in the future for TargetMachine based caching lookups from the
 MachineFunction easily.

Update the MIPS subtarget switching machinery to update this pointer
at the same time it runs.

llvm-svn: 214838
---
 llvm/lib/CodeGen/MachineFunction.cpp | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

(limited to 'llvm/lib/CodeGen/MachineFunction.cpp')

diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 9f28ed3..2129288 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -54,8 +54,9 @@ void ilist_traits<MachineBasicBlock>::deleteNode(MachineBasicBlock *MBB) {
 
 MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM,
                                  unsigned FunctionNum, MachineModuleInfo &mmi,
-                                 GCModuleInfo* gmi)
-  : Fn(F), Target(TM), Ctx(mmi.getContext()), MMI(mmi), GMI(gmi) {
+                                 GCModuleInfo *gmi)
+    : Fn(F), Target(TM), STI(TM.getSubtargetImpl()), Ctx(mmi.getContext()),
+      MMI(mmi), GMI(gmi) {
   if (TM.getSubtargetImpl()->getRegisterInfo())
     RegInfo = new (Allocator) MachineRegisterInfo(TM);
   else
@@ -353,8 +354,7 @@ void MachineFunction::print(raw_ostream &OS, SlotIndexes *Indexes) const {
   // Print Constant Pool
   ConstantPool->print(OS);
 
-  const TargetRegisterInfo *TRI =
-      getTarget().getSubtargetImpl()->getRegisterInfo();
+  const TargetRegisterInfo *TRI = getSubtarget().getRegisterInfo();
 
   if (RegInfo && !RegInfo->livein_empty()) {
     OS << "Function Live Ins: ";
@@ -463,7 +463,7 @@ unsigned MachineFunction::addLiveIn(unsigned PReg,
 /// normal 'L' label is returned.
 MCSymbol *MachineFunction::getJTISymbol(unsigned JTI, MCContext &Ctx,
                                         bool isLinkerPrivate) const {
-  const DataLayout *DL = getTarget().getSubtargetImpl()->getDataLayout();
+  const DataLayout *DL = getSubtarget().getDataLayout();
   assert(JumpTableInfo && "No jump tables");
   assert(JTI < JumpTableInfo->getJumpTables().size() && "Invalid JTI!");
 
@@ -478,7 +478,7 @@ MCSymbol *MachineFunction::getJTISymbol(unsigned JTI, MCContext &Ctx,
 /// getPICBaseSymbol - Return a function-local symbol to represent the PIC
 /// base.
 MCSymbol *MachineFunction::getPICBaseSymbol() const {
-  const DataLayout *DL = getTarget().getSubtargetImpl()->getDataLayout();
+  const DataLayout *DL = getSubtarget().getDataLayout();
   return Ctx.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix())+
                                Twine(getFunctionNumber())+"$pb");
 }
@@ -629,10 +629,8 @@ MachineFrameInfo::getPristineRegs(const MachineBasicBlock *MBB) const {
 }
 
 unsigned MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
-  const TargetFrameLowering *TFI =
-      MF.getTarget().getSubtargetImpl()->getFrameLowering();
-  const TargetRegisterInfo *RegInfo =
-      MF.getTarget().getSubtargetImpl()->getRegisterInfo();
+  const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
+  const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
   unsigned MaxAlign = getMaxAlignment();
   int Offset = 0;
 
@@ -682,8 +680,7 @@ unsigned MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
 void MachineFrameInfo::print(const MachineFunction &MF, raw_ostream &OS) const{
   if (Objects.empty()) return;
 
-  const TargetFrameLowering *FI =
-      MF.getTarget().getSubtargetImpl()->getFrameLowering();
+  const TargetFrameLowering *FI = MF.getSubtarget().getFrameLowering();
   int ValOffset = (FI ? FI->getOffsetOfLocalArea() : 0);
 
   OS << "Frame Objects:\n";
-- 
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