From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 20 Jun 2016 19:00:05 +0000 (+0000)
Subject: Add a isPositionIndependent helper to ARMFastISel. NFC.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1408d404899b16e8e93e6a6d736ad78cc53dfd0c;p=llvm

Add a isPositionIndependent helper to ARMFastISel. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273187 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index cbd96a72e07..b824d118bc2 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -163,6 +163,7 @@ class ARMFastISel final : public FastISel {
 
     // Utility routines.
   private:
+    bool isPositionIndependent() const;
     bool isTypeLegal(Type *Ty, MVT &VT);
     bool isLoadTypeLegal(Type *Ty, MVT &VT);
     bool ARMEmitCmp(const Value *Src1Value, const Value *Src2Value,
@@ -575,6 +576,10 @@ unsigned ARMFastISel::ARMMaterializeInt(const Constant *C, MVT VT) {
   return ResultReg;
 }
 
+bool ARMFastISel::isPositionIndependent() const {
+  return TM.getRelocationModel() == Reloc::PIC_;
+}
+
 unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
   // For now 32-bit only.
   if (VT != MVT::i32 || GV->isThreadLocal()) return 0;
@@ -590,16 +595,17 @@ unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
   bool IsThreadLocal = GVar && GVar->isThreadLocal();
   if (!Subtarget->isTargetMachO() && IsThreadLocal) return 0;
 
+  bool IsPositionIndependent = isPositionIndependent();
   // Use movw+movt when possible, it avoids constant pool entries.
   // Non-darwin targets only support static movt relocations in FastISel.
   if (Subtarget->useMovt(*FuncInfo.MF) &&
-      (Subtarget->isTargetMachO() || RelocM == Reloc::Static)) {
+      (Subtarget->isTargetMachO() || !IsPositionIndependent)) {
     unsigned Opc;
     unsigned char TF = 0;
     if (Subtarget->isTargetMachO())
       TF = ARMII::MO_NONLAZY;
 
-    if (RelocM == Reloc::PIC_)
+    if (IsPositionIndependent)
       Opc = isThumb2 ? ARM::t2MOV_ga_pcrel : ARM::MOV_ga_pcrel;
     else
       Opc = isThumb2 ? ARM::t2MOVi32imm : ARM::MOVi32imm;
@@ -613,12 +619,11 @@ unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
       Align = DL.getTypeAllocSize(GV->getType());
     }
 
-    if (Subtarget->isTargetELF() && RelocM == Reloc::PIC_)
+    if (Subtarget->isTargetELF() && IsPositionIndependent)
       return ARMLowerPICELF(GV, Align, VT);
 
     // Grab index.
-    unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 :
-      (Subtarget->isThumb() ? 4 : 8);
+    unsigned PCAdj = IsPositionIndependent ? (Subtarget->isThumb() ? 4 : 8) : 0;
     unsigned Id = AFI->createPICLabelUId();
     ARMConstantPoolValue *CPV = ARMConstantPoolConstant::Create(GV, Id,
                                                                 ARMCP::CPValue,
@@ -628,10 +633,10 @@ unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
     // Load value.
     MachineInstrBuilder MIB;
     if (isThumb2) {
-      unsigned Opc = (RelocM!=Reloc::PIC_) ? ARM::t2LDRpci : ARM::t2LDRpci_pic;
+      unsigned Opc = IsPositionIndependent ? ARM::t2LDRpci_pic : ARM::t2LDRpci;
       MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc),
                     DestReg).addConstantPoolIndex(Idx);
-      if (RelocM == Reloc::PIC_)
+      if (IsPositionIndependent)
         MIB.addImm(Id);
       AddOptionalDefs(MIB);
     } else {
@@ -643,7 +648,7 @@ unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
                 .addImm(0);
       AddOptionalDefs(MIB);
 
-      if (RelocM == Reloc::PIC_) {
+      if (IsPositionIndependent) {
         unsigned Opc = IsIndirect ? ARM::PICLDR : ARM::PICADD;
         unsigned NewDestReg = createResultReg(TLI.getRegClassFor(VT));