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use existing basic block numbers instead of recomputing

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a new set of them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94631 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-27 00:20:02 +00:00
parent 4129ccdb70
commit d3b31a73e8
1 changed files with 4 additions and 23 deletions
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27
lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp
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@ -44,17 +44,10 @@ STATISTIC(EmittedInsts, "Number of machine instrs printed");
namespace { namespace {
class SparcAsmPrinter : public AsmPrinter { class SparcAsmPrinter : public AsmPrinter {
/// We name each basic block in a Function with a unique number, so
/// that we can consistently refer to them later. This is cleared
/// at the beginning of each call to runOnMachineFunction().
///
typedef std::map<const Value *, unsigned> ValueMapTy;
ValueMapTy NumberForBB;
unsigned BBNumber;
public: public:
explicit SparcAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM, explicit SparcAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
const MCAsmInfo *T, bool V) const MCAsmInfo *T, bool V)
: AsmPrinter(O, TM, T, V), BBNumber(0) {} : AsmPrinter(O, TM, T, V) {}
virtual const char *getPassName() const { virtual const char *getPassName() const {
return "Sparc Assembly Printer"; return "Sparc Assembly Printer";
@ -88,25 +81,13 @@ bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
EmitFunctionHeader(); EmitFunctionHeader();
// BBNumber is used here so that a given Printer will never give two
// BBs the same name. (If you have a better way, please let me know!)
// Number each basic block so that we can consistently refer to them
// in PC-relative references.
// FIXME: Why not use the MBB numbers?
NumberForBB.clear();
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
NumberForBB[I->getBasicBlock()] = BBNumber++;
}
// Print out code for the function. // Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) { I != E; ++I) {
// Print a label for the basic block. // Print a label for the basic block.
if (I != MF.begin()) { if (I != MF.begin())
EmitBasicBlockStart(I); EmitBasicBlockStart(I);
}
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) { II != E; ++II) {
// Print the assembly for the instruction. // Print the assembly for the instruction.
@ -209,7 +190,7 @@ bool SparcAsmPrinter::printGetPCX(const MachineInstr *MI, unsigned opNum) {
break; break;
} }
unsigned bbNum = NumberForBB[MI->getParent()->getBasicBlock()]; unsigned bbNum = MI->getParent()->getNumber();
O << '\n' << ".LLGETPCH" << bbNum << ":\n"; O << '\n' << ".LLGETPCH" << bbNum << ":\n";
O << "\tcall\t.LLGETPC" << bbNum << '\n' ; O << "\tcall\t.LLGETPC" << bbNum << '\n' ;