[llvm-commits] [llvm] r129374 - in /llvm/trunk/lib/CodeGen: SplitKit.cpp SplitKit.h

[Jakob Stoklund Olesen]

Author: stoklund
Date: Tue Apr 12 13:11:31 2011
New Revision: 129374

URL: http://llvm.org/viewvc/llvm-project?rev=129374&view=rev
Log:
Add SplitKit API to query and select the current interval being worked on.

This makes it possible to target multiple registers in one pass.

Modified:
    llvm/trunk/lib/CodeGen/SplitKit.cpp
    llvm/trunk/lib/CodeGen/SplitKit.h

Modified: llvm/trunk/lib/CodeGen/SplitKit.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SplitKit.cpp?rev=129374&r1=129373&r2=129374&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SplitKit.cpp (original)
+++ llvm/trunk/lib/CodeGen/SplitKit.cpp Tue Apr 12 13:11:31 2011
@@ -557,7 +557,7 @@
 }
 
 /// Create a new virtual register and live interval.
-void SplitEditor::openIntv() {
+unsigned SplitEditor::openIntv() {
   assert(!OpenIdx && "Previous LI not closed before openIntv");
 
   // Create the complement as index 0.
@@ -567,6 +567,13 @@
   // Create the open interval.
   OpenIdx = Edit->size();
   Edit->create(LIS, VRM);
+  return OpenIdx;
+}
+
+void SplitEditor::selectIntv(unsigned Idx) {
+  assert(Idx != 0 && "Cannot select the complement interval");
+  assert(Idx < Edit->size() && "Can only select previously opened interval");
+  OpenIdx = Idx;
 }
 
 SlotIndex SplitEditor::enterIntvBefore(SlotIndex Idx) {

Modified: llvm/trunk/lib/CodeGen/SplitKit.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SplitKit.h?rev=129374&r1=129373&r2=129374&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SplitKit.h (original)
+++ llvm/trunk/lib/CodeGen/SplitKit.h Tue Apr 12 13:11:31 2011
@@ -283,7 +283,15 @@
   void reset(LiveRangeEdit&);
 
   /// Create a new virtual register and live interval.
-  void openIntv();
+  /// Return the interval index, starting from 1. Interval index 0 is the
+  /// implicit complement interval.
+  unsigned openIntv();
+
+  /// currentIntv - Return the current interval index.
+  unsigned currentIntv() const { return OpenIdx; }
+
+  /// selectIntv - Select a previously opened interval index.
+  void selectIntv(unsigned Idx);
 
   /// enterIntvBefore - Enter the open interval before the instruction at Idx.
   /// If the parent interval is not live before Idx, a COPY is not inserted.