#define DEBUG_TYPE "ppc-branch-select"
#include "PPC.h"
+#include "MCTargetDesc/PPCPredicates.h"
#include "PPCInstrBuilder.h"
#include "PPCInstrInfo.h"
-#include "MCTargetDesc/PPCPredicates.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Target/TargetMachine.h"
using namespace llvm;
STATISTIC(NumExpanded, "Number of branches expanded to long format");
+namespace llvm {
+ void initializePPCBSelPass(PassRegistry&);
+}
+
namespace {
struct PPCBSel : public MachineFunctionPass {
static char ID;
- PPCBSel() : MachineFunctionPass(ID) {}
+ PPCBSel() : MachineFunctionPass(ID) {
+ initializePPCBSelPass(*PassRegistry::getPassRegistry());
+ }
/// BlockSizes - The sizes of the basic blocks in the function.
std::vector<unsigned> BlockSizes;
char PPCBSel::ID = 0;
}
+INITIALIZE_PASS(PPCBSel, "ppc-branch-select", "PowerPC Branch Selector",
+ false, false)
+
/// createPPCBranchSelectionPass - returns an instance of the Branch Selection
/// Pass
///
unsigned MBBStartOffset = 0;
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
I != E; ++I) {
- if (I->getOpcode() != PPC::BCC || I->getOperand(2).isImm()) {
+ MachineBasicBlock *Dest = 0;
+ if (I->getOpcode() == PPC::BCC && !I->getOperand(2).isImm())
+ Dest = I->getOperand(2).getMBB();
+ else if ((I->getOpcode() == PPC::BDNZ8 || I->getOpcode() == PPC::BDNZ ||
+ I->getOpcode() == PPC::BDZ8 || I->getOpcode() == PPC::BDZ) &&
+ !I->getOperand(0).isImm())
+ Dest = I->getOperand(0).getMBB();
+
+ if (!Dest) {
MBBStartOffset += TII->GetInstSizeInBytes(I);
continue;
}
// Determine the offset from the current branch to the destination
// block.
- MachineBasicBlock *Dest = I->getOperand(2).getMBB();
-
int BranchSize;
if (Dest->getNumber() <= MBB.getNumber()) {
// If this is a backwards branch, the delta is the offset from the