Changes in directory llvm/include/llvm/CodeGen:
LiveIntervalAnalysis.h updated: 1.68 -> 1.69
---
Log message:
- Changes how function livein's are handled, they now have a start index of 0.
- When coalescing a copy MI, if its destination is "dead", propagate the
property to the source MI's destination if there are no intervening uses.
- Detect dead function live-in's and remove them.
---
Diffs of the changes: (+16 -2)
LiveIntervalAnalysis.h | 18 ++++++++++++++++--
1 files changed, 16 insertions(+), 2 deletions(-)
Index: llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h
diff -u llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h:1.68
llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h:1.69
--- llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h:1.68 Wed Feb 14
23:57:14 2007
+++ llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h Sat Feb 17 05:15:40 2007
@@ -118,6 +118,11 @@
return I->second;
}
+ bool hasInterval(unsigned reg) const {
+ Reg2IntervalMap::const_iterator I = r2iMap_.find(reg);
+ return I != r2iMap_.end();
+ }
+
/// getMBBStartIdx - Return the base index of the first instruction in the
/// specified MachineBasicBlock.
unsigned getMBBStartIdx(MachineBasicBlock *MBB) const {
@@ -189,6 +194,7 @@
/// 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
@@ -233,6 +239,9 @@
LiveInterval &interval,
unsigned SrcReg);
+ /// handleLiveInRegister - Create interval for a livein register.
+ void handleLiveInRegister(MachineBasicBlock* mbb, LiveInterval &interval);
+
/// Return true if the two specified registers belong to different
/// register classes. The registers may be either phys or virt regs.
bool differingRegisterClasses(unsigned RegA, unsigned RegB) const;
@@ -241,11 +250,16 @@
bool AdjustCopiesBackFrom(LiveInterval &IntA, LiveInterval &IntB,
MachineInstr *CopyMI);
- bool overlapsAliases(const LiveInterval *lhs,
- const LiveInterval *rhs) const;
+ /// hasRegisterUse - Returns true if there is any use of the specific
+ /// reg between indexes Start and End.
+ bool hasRegisterUse(unsigned Reg, unsigned Start, unsigned End);
static LiveInterval createInterval(unsigned Reg);
+ void removeInterval(unsigned Reg) {
+ r2iMap_.erase(Reg);
+ }
+
LiveInterval &getOrCreateInterval(unsigned reg) {
Reg2IntervalMap::iterator I = r2iMap_.find(reg);
if (I == r2iMap_.end())
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