Add TargetInstrInfo::isSafeToMoveRegisterClassDefs. It returns true if it's safe...

[oota-llvm.git] / lib / CodeGen / SimpleRegisterCoalescing.h

diff --git a/lib/CodeGen/SimpleRegisterCoalescing.h b/lib/CodeGen/SimpleRegisterCoalescing.h
index cce5cebd9e6f1bc1a164aff86245fd2c70fd75d1..9e55c220034bca93ffcfb9fb53f849f238c29535 100644 (file)
--- a/lib/CodeGen/SimpleRegisterCoalescing.h
+++ b/lib/CodeGen/SimpleRegisterCoalescing.h
@@ -196,6 +196,15 @@ namespace llvm {
     bool RemoveCopyByCommutingDef(LiveInterval &IntA, LiveInterval &IntB,
                                   MachineInstr *CopyMI);
 
+    /// TrimLiveIntervalToLastUse - If there is a last use in the same basic
+    /// block as the copy instruction, trim the ive interval to the last use
+    /// and return true.
+    bool TrimLiveIntervalToLastUse(unsigned CopyIdx,
+                                   MachineBasicBlock *CopyMBB,
+                                   LiveInterval &li, const LiveRange *LR);
+
+    /// ReMaterializeTrivialDef - If the source of a copy is defined by a trivial
+    /// computation, replace the copy by rematerialize the definition.
     bool ReMaterializeTrivialDef(LiveInterval &SrcInt, unsigned DstReg,
                                  MachineInstr *CopyMI);