mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-03-18 12:31:26 +00:00
Implement a FIXME, improving the efficiency of DSA on povray.
This reduces CBU time from 145s -> 122s (debug build), reduces # allocated nodes from 129420 to 116477. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12125 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
7a3ae1fbad
commit
e6e93ccd0c
@ -785,8 +785,22 @@ DSNodeHandle ReachabilityCloner::getClonedNH(const DSNodeHandle &SrcNH) {
|
||||
if (!NH.isNull()) // Node already mapped?
|
||||
return DSNodeHandle(NH.getNode(), NH.getOffset()+SrcNH.getOffset());
|
||||
|
||||
// FIXME if SrcNH has globals and the dest graph contains the same globals, we
|
||||
// could use 'merge' to do this work more efficiently!
|
||||
// If SrcNH has globals and the destination graph has one of the same globals,
|
||||
// merge this node with the destination node, which is much more efficient.
|
||||
if (SN->global_begin() != SN->global_end()) {
|
||||
DSScalarMap &DestSM = Dest.getScalarMap();
|
||||
for (DSNode::global_iterator I = SN->global_begin(), E = SN->global_end();
|
||||
I != E; ++I) {
|
||||
GlobalValue *GV = *I;
|
||||
DSScalarMap::iterator GI = DestSM.find(GV);
|
||||
if (GI != DestSM.end() && !GI->second.isNull()) {
|
||||
// We found one, use merge instead!
|
||||
merge(GI->second, Src.getNodeForValue(GV));
|
||||
assert(!NH.isNull() && "Didn't merge node!");
|
||||
return DSNodeHandle(NH.getNode(), NH.getOffset()+SrcNH.getOffset());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
DSNode *DN = new DSNode(*SN, &Dest, true /* Null out all links */);
|
||||
DN->maskNodeTypes(BitsToKeep);
|
||||
|
Loading…
x
Reference in New Issue
Block a user