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Don't create a new node for every reference to a global. This caused a huge 

node explosion that doesn't help anything at all.  In previous versions of
the representation this DID help, but not anymore.

llvm-svn: 4249
This commit is contained in:
Chris Lattner 2002-10-21 13:51:30 +00:00
parent 800b7e33df
commit 32438d8c84
1 changed files with 2 additions and 5 deletions
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7
llvm/lib/Analysis/DataStructure/Local.cpp
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@ -186,12 +186,9 @@ DSNodeHandle &GraphBuilder::getGlobalNode(GlobalValue &V) {
//
DSNodeHandle GraphBuilder::getValueNode(Value &V) {
assert(isPointerType(V.getType()) && "Should only use pointer scalars!");
// Do not share the pointer value to globals... this would cause way too much
// false merging.
//
DSNodeHandle &NH = ValueMap[&V];
if (!isa<GlobalValue>(V) && NH.getNode())
return NH; // Already have a node? Just return it...
if (NH.getNode()) return NH; // Already have a node? Just return it...
// Otherwise we need to create a new scalar node...
DSNode *N = createNode(DSNode::ScalarNode, V.getType());