1 files changed, 43 insertions, 4 deletions

diff --git a/lib/Target/Mips/MipsSEInstrInfo.cpp b/lib/Target/Mips/MipsSEInstrInfo.cpp
index eeb1de36ef..e4b44efd81 100644
--- a/lib/Target/Mips/MipsSEInstrInfo.cpp
+++ b/lib/Target/Mips/MipsSEInstrInfo.cpp
@@ -260,14 +260,53 @@ void MipsSEInstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
   if (isInt<16>(Amount))// addi sp, sp, amount
     BuildMI(MBB, I, DL, get(ADDiu), SP).addReg(SP).addImm(Amount);
   else { // Expand immediate that doesn't fit in 16-bit.
-    unsigned ATReg = STI.isABI_N64() ? Mips::AT_64 : Mips::AT;
-
     MBB.getParent()->getInfo<MipsFunctionInfo>()->setEmitNOAT();
-    Mips::loadImmediate(Amount, STI.isABI_N64(), *this, MBB, I, DL, false, 0);
-    BuildMI(MBB, I, DL, get(ADDu), SP).addReg(SP).addReg(ATReg);
+    unsigned Reg = loadImmediate(Amount, MBB, I, DL, 0);
+    BuildMI(MBB, I, DL, get(ADDu), SP).addReg(SP).addReg(Reg);
   }
 }
 
+/// This function generates the sequence of instructions needed to get the
+/// result of adding register REG and immediate IMM.
+unsigned
+MipsSEInstrInfo::loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
+                               MachineBasicBlock::iterator II, DebugLoc DL,
+                               unsigned *NewImm) const {
+  MipsAnalyzeImmediate AnalyzeImm;
+  const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
+  unsigned Size = STI.isABI_N64() ? 64 : 32;
+  unsigned LUi = STI.isABI_N64() ? Mips::LUi64 : Mips::LUi;
+  unsigned ZEROReg = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
+  unsigned ATReg = STI.isABI_N64() ? Mips::AT_64 : Mips::AT;
+  bool LastInstrIsADDiu = NewImm;
+
+  const MipsAnalyzeImmediate::InstSeq &Seq =
+    AnalyzeImm.Analyze(Imm, Size, LastInstrIsADDiu);
+  MipsAnalyzeImmediate::InstSeq::const_iterator Inst = Seq.begin();
+
+  assert(Seq.size() && (!LastInstrIsADDiu || (Seq.size() > 1)));
+
+  // The first instruction can be a LUi, which is different from other
+  // instructions (ADDiu, ORI and SLL) in that it does not have a register
+  // operand.
+  if (Inst->Opc == LUi)
+    BuildMI(MBB, II, DL, get(LUi), ATReg)
+      .addImm(SignExtend64<16>(Inst->ImmOpnd));
+  else
+    BuildMI(MBB, II, DL, get(Inst->Opc), ATReg).addReg(ZEROReg)
+      .addImm(SignExtend64<16>(Inst->ImmOpnd));
+
+  // Build the remaining instructions in Seq.
+  for (++Inst; Inst != Seq.end() - LastInstrIsADDiu; ++Inst)
+    BuildMI(MBB, II, DL, get(Inst->Opc), ATReg).addReg(ATReg)
+      .addImm(SignExtend64<16>(Inst->ImmOpnd));
+
+  if (LastInstrIsADDiu)
+    *NewImm = Inst->ImmOpnd;
+
+  return ATReg;
+}
+
 unsigned MipsSEInstrInfo::GetAnalyzableBrOpc(unsigned Opc) const {
   return (Opc == Mips::BEQ    || Opc == Mips::BNE    || Opc == Mips::BGTZ   ||
           Opc == Mips::BGEZ   || Opc == Mips::BLTZ   || Opc == Mips::BLEZ   ||