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Iteration is required for some cases, even if they don't occur in crafty.

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Restore it, which re-fixes X86/2006-08-21-ExtraMovInst.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30050 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-09-02 05:32:53 +00:00
parent f21f0205b5
commit 1acb17cb83
2 changed files with 39 additions and 16 deletions
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18
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@@ -53,6 +53,17 @@ namespace llvm {
std::vector<bool> allocatableRegs_;
public:
struct CopyRec {
MachineInstr *MI;
unsigned SrcReg, DstReg;
};
CopyRec getCopyRec(MachineInstr *MI, unsigned SrcReg, unsigned DstReg) {
CopyRec R;
R.MI = MI;
R.SrcReg = SrcReg;
R.DstReg = DstReg;
return R;
}
struct InstrSlots {
enum {
LOAD = 0,
@@ -150,9 +161,10 @@ namespace llvm {
/// joinIntervals - join compatible live intervals
void joinIntervals();
/// CopyCoallesceInMBB - Coallsece copies in the specified MBB.
void CopyCoallesceInMBB(MachineBasicBlock *MBB);
/// CopyCoallesceInMBB - Coallsece copies in the specified MBB, putting
/// copies that cannot yet be coallesced into the "TryAgain" list.
void CopyCoallesceInMBB(MachineBasicBlock *MBB,
std::vector<CopyRec> &TryAgain);
/// JoinCopy - Attempt to join intervals corresponding to SrcReg/DstReg,
/// which are the src/dst of the copy instruction CopyMI. This returns true
/// if the copy was successfully coallesced away, or if it is never possible