// This pass expands a branch or jump instruction into a long branch if its
// offset is too large to fit into its immediate field.
//
-// FIXME:
-// 1. Fix pc-region jump instructions which cross 256MB segment boundaries.
+// FIXME:
+// 1. Fix pc-region jump instructions which cross 256MB segment boundaries.
// 2. If program has inline assembly statements whose size cannot be
-// determined accurately, load branch target addresses from the GOT.
+// determined accurately, load branch target addresses from the GOT.
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "mips-long-branch"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/Function.h"
+#include "llvm/IR/Function.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetInstrInfo.h"
// MachineBasicBlock operand MBBOpnd.
void MipsLongBranch::replaceBranch(MachineBasicBlock &MBB, Iter Br,
DebugLoc DL, MachineBasicBlock *MBBOpnd) {
- unsigned NewOpc = TII->GetOppositeBranchOpc(Br->getOpcode());
+ unsigned NewOpc = TII->getOppositeBranchOpc(Br->getOpcode());
const MCInstrDesc &NewDesc = TII->get(NewOpc);
MachineInstrBuilder MIB = BuildMI(MBB, Br, DL, NewDesc);
.addReg(Mips::SP).addImm(-8);
BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::SW)).addReg(Mips::RA)
.addReg(Mips::SP).addImm(0);
- BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::BAL_BR)).addMBB(BalTgtMBB);
- BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::LUi), Mips::AT).addImm(Hi)
- ->setIsInsideBundle();
+
+ MIBundleBuilder(*LongBrMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::BAL_BR)).addMBB(BalTgtMBB))
+ .append(BuildMI(*MF, DL, TII->get(Mips::LUi), Mips::AT).addImm(Hi));
Pos = BalTgtMBB->begin();
.addReg(Mips::RA).addReg(Mips::AT);
BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::LW), Mips::RA)
.addReg(Mips::SP).addImm(0);
- BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::JR)).addReg(Mips::AT);
- BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::ADDiu), Mips::SP)
- .addReg(Mips::SP).addImm(8)->setIsInsideBundle();
+
+ MIBundleBuilder(*BalTgtMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::JR)).addReg(Mips::AT))
+ .append(BuildMI(*MF, DL, TII->get(Mips::ADDiu), Mips::SP)
+ .addReg(Mips::SP).addImm(8));
} else {
// $longbr:
// daddiu $sp, $sp, -16
.addReg(Mips::AT_64).addImm(16);
BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::DADDiu), Mips::AT_64)
.addReg(Mips::AT_64).addImm(Hi);
- BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::BAL_BR)).addMBB(BalTgtMBB);
- BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::DSLL), Mips::AT_64)
- .addReg(Mips::AT_64).addImm(16)->setIsInsideBundle();
+
+ MIBundleBuilder(*LongBrMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::BAL_BR)).addMBB(BalTgtMBB))
+ .append(BuildMI(*MF, DL, TII->get(Mips::DSLL), Mips::AT_64)
+ .addReg(Mips::AT_64).addImm(16));
Pos = BalTgtMBB->begin();
.addReg(Mips::RA_64).addReg(Mips::AT_64);
BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::LD), Mips::RA_64)
.addReg(Mips::SP_64).addImm(0);
- BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::JR64)).addReg(Mips::AT_64);
- BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::DADDiu), Mips::SP_64)
- .addReg(Mips::SP_64).addImm(16)->setIsInsideBundle();
+
+ MIBundleBuilder(*BalTgtMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::JR64)).addReg(Mips::AT_64))
+ .append(BuildMI(*MF, DL, TII->get(Mips::DADDiu), Mips::SP_64)
+ .addReg(Mips::SP_64).addImm(16));
}
assert(BalTgtMBBSize == BalTgtMBB->size());
//
Pos = LongBrMBB->begin();
LongBrMBB->addSuccessor(TgtMBB);
- BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::J)).addMBB(TgtMBB);
- BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::NOP))->setIsInsideBundle();
+ MIBundleBuilder(*LongBrMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::J)).addMBB(TgtMBB))
+ .append(BuildMI(*MF, DL, TII->get(Mips::NOP)));
assert(LongBrMBB->size() == LongBranchSeqSize);
}
}
bool MipsLongBranch::runOnMachineFunction(MachineFunction &F) {
+ if (TM.getSubtarget<MipsSubtarget>().inMips16Mode())
+ return false;
if ((TM.getRelocationModel() == Reloc::PIC_) &&
TM.getSubtarget<MipsSubtarget>().isABI_O32() &&
F.getInfo<MipsFunctionInfo>()->globalBaseRegSet())