Extract SpillPlacement::addLinks for handling the special transparent blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129079 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SpillPlacement.cpp b/lib/CodeGen/SpillPlacement.cpp
index 0ccb93f..ac7a192 100644
--- a/lib/CodeGen/SpillPlacement.cpp
+++ b/lib/CodeGen/SpillPlacement.cpp
@@ -213,23 +213,6 @@
for (ArrayRef<BlockConstraint>::iterator I = LiveBlocks.begin(),
E = LiveBlocks.end(); I != E; ++I) {
float Freq = getBlockFrequency(I->Number);
-
- // Is this a transparent block? Link ingoing and outgoing bundles.
- if (I->Entry == DontCare && I->Exit == DontCare) {
- unsigned ib = bundles->getBundle(I->Number, 0);
- unsigned ob = bundles->getBundle(I->Number, 1);
-
- // Ignore self-loops.
- if (ib == ob)
- continue;
- activate(ib);
- activate(ob);
- nodes[ib].addLink(ob, Freq, 1);
- nodes[ob].addLink(ib, Freq, 0);
- continue;
- }
-
- // This block is not transparent, but it can still add bias.
const float Bias[] = {
0, // DontCare,
1, // PrefReg,
@@ -253,6 +236,24 @@
}
}
+void SpillPlacement::addLinks(ArrayRef<unsigned> Links) {
+ for (ArrayRef<unsigned>::iterator I = Links.begin(), E = Links.end(); I != E;
+ ++I) {
+ unsigned Number = *I;
+ unsigned ib = bundles->getBundle(Number, 0);
+ unsigned ob = bundles->getBundle(Number, 1);
+
+ // Ignore self-loops.
+ if (ib == ob)
+ continue;
+ activate(ib);
+ activate(ob);
+ float Freq = getBlockFrequency(Number);
+ nodes[ib].addLink(ob, Freq, 1);
+ nodes[ob].addLink(ib, Freq, 0);
+ }
+}
+
/// iterate - Repeatedly update the Hopfield nodes until stability or the
/// maximum number of iterations is reached.
/// @param Linked - Numbers of linked nodes that need updating.