Changes in directory llvm/utils/TableGen:
DAGISelEmitter.cpp updated: 1.160 -> 1.161
---
Log message:
node predicates add to the complexity of a pattern. This ensures that the
X86 backend attempts to match small-immediate versions of instructions before
the full size immediate versions.
---
Diffs of the changes: (+9 -2)
DAGISelEmitter.cpp | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
Index: llvm/utils/TableGen/DAGISelEmitter.cpp
diff -u llvm/utils/TableGen/DAGISelEmitter.cpp:1.160
llvm/utils/TableGen/DAGISelEmitter.cpp:1.161
--- llvm/utils/TableGen/DAGISelEmitter.cpp:1.160 Fri Feb 3 00:22:41 2006
+++ llvm/utils/TableGen/DAGISelEmitter.cpp Fri Feb 3 12:06:02 2006
@@ -1722,7 +1722,12 @@
const ComplexPattern *AM = NodeGetComplexPattern(P, ISE);
if (AM)
Size += AM->getNumOperands() * 2;
-
+
+ // If this node has some predicate function that must match, it adds to the
+ // complexity of this node.
+ if (!P->getPredicateFn().empty())
+ ++Size;
+
// Count children in the count if they are also nodes.
for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i) {
TreePatternNode *Child = P->getChild(i);
@@ -1730,9 +1735,11 @@
Size += getPatternSize(Child, ISE);
else if (Child->isLeaf()) {
if (dynamic_cast<IntInit*>(Child->getLeafValue()))
- Size += 3; // Matches a ConstantSDNode.
+ Size += 3; // Matches a ConstantSDNode (+2) and a specific value (+1).
else if (NodeIsComplexPattern(Child))
Size += getPatternSize(Child, ISE);
+ else if (!Child->getPredicateFn().empty())
+ ++Size;
}
}
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
