[llvm-commits] [llvm] r135844 - in /llvm/trunk/lib/CodeGen: SpillPlacement.cpp SpillPlacement.h
Jakob Stoklund Olesen
stoklund at 2pi.dk
Fri Jul 22 20:10:20 PDT 2011
Author: stoklund
Date: Fri Jul 22 22:10:19 2011
New Revision: 135844
URL: http://llvm.org/viewvc/llvm-project?rev=135844&view=rev
Log:
Add a simple method for marking blocks with interference in and out.
This method matches addLinks - All the listed blocks are considered to
have interference, so they add a negative bias to their bundles.
This could also be done by addConstraints, but that requires building a
separate BlockConstraint array.
Modified:
llvm/trunk/lib/CodeGen/SpillPlacement.cpp
llvm/trunk/lib/CodeGen/SpillPlacement.h
Modified: llvm/trunk/lib/CodeGen/SpillPlacement.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SpillPlacement.cpp?rev=135844&r1=135843&r2=135844&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SpillPlacement.cpp (original)
+++ llvm/trunk/lib/CodeGen/SpillPlacement.cpp Fri Jul 22 22:10:19 2011
@@ -239,6 +239,20 @@
}
}
+/// addPrefSpill - Same as addConstraints(PrefSpill)
+void SpillPlacement::addPrefSpill(ArrayRef<unsigned> Blocks) {
+ for (ArrayRef<unsigned>::iterator I = Blocks.begin(), E = Blocks.end();
+ I != E; ++I) {
+ float Freq = getBlockFrequency(*I);
+ unsigned ib = bundles->getBundle(*I, 0);
+ unsigned ob = bundles->getBundle(*I, 1);
+ activate(ib);
+ activate(ob);
+ nodes[ib].addBias(-Freq, 1);
+ nodes[ob].addBias(-Freq, 0);
+ }
+}
+
void SpillPlacement::addLinks(ArrayRef<unsigned> Links) {
for (ArrayRef<unsigned>::iterator I = Links.begin(), E = Links.end(); I != E;
++I) {
Modified: llvm/trunk/lib/CodeGen/SpillPlacement.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SpillPlacement.h?rev=135844&r1=135843&r2=135844&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SpillPlacement.h (original)
+++ llvm/trunk/lib/CodeGen/SpillPlacement.h Fri Jul 22 22:10:19 2011
@@ -96,6 +96,10 @@
/// live out.
void addConstraints(ArrayRef<BlockConstraint> LiveBlocks);
+ /// addPrefSpill - Add PrefSpill constraints to all blocks listed.
+ /// @param Blocks Array of block numbers that prefer to spill in and out.
+ void addPrefSpill(ArrayRef<unsigned> Blocks);
+
/// addLinks - Add transparent blocks with the given numbers.
void addLinks(ArrayRef<unsigned> Links);
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