[llvm-commits] CVS: llvm/lib/Analysis/IPA/IPModRef.cpp
Chris Lattner
lattner at cs.uiuc.edu
Wed Nov 6 13:39:03 PST 2002
Changes in directory llvm/lib/Analysis/IPA:
IPModRef.cpp updated: 1.3 -> 1.4
---
Log message:
Add a stub to implement the context sensitive mod/ref info for call sites
---
Diffs of the changes:
Index: llvm/lib/Analysis/IPA/IPModRef.cpp
diff -u llvm/lib/Analysis/IPA/IPModRef.cpp:1.3 llvm/lib/Analysis/IPA/IPModRef.cpp:1.4
--- llvm/lib/Analysis/IPA/IPModRef.cpp:1.3 Wed Nov 6 13:07:13 2002
+++ llvm/lib/Analysis/IPA/IPModRef.cpp Wed Nov 6 13:38:43 2002
@@ -74,16 +74,6 @@
-// Dummy function that will be replaced with one that inlines
-// the callee's BU graph into the caller's TD graph.
-//
-static const DSGraph* ResolveGraphForCallSite(const DSGraph& funcTDGraph,
- const CallInst& callInst)
-{
- return &funcTDGraph; // TEMPORARY
-}
-
-
// Compute Mod/Ref bit vectors for the entire function.
// These are simply copies of the Read/Write flags from the nodes of
// the top-down DS graph.
@@ -108,6 +98,27 @@
computeModRef(callSites[i].getCallInst());
}
+// ResolveCallSiteModRefInfo - This method performs the following actions:
+//
+// 1. It clones the top-down graph for the current function
+// 2. It clears all of the mod/ref bits in the cloned graph
+// 3. It then merges the bottom-up graph(s) for the specified call-site into
+// the clone (bringing new mod/ref bits).
+// 4. It returns the clone.
+//
+// NOTE: Because this clones a dsgraph and returns it, the caller is responsible
+// for deleting the returned graph!
+//
+DSGraph *FunctionModRefInfo::ResolveCallSiteModRefInfo(const CallInst &CI) {
+ // Step #1: Clone the top-down graph...
+ DSGraph *Result = new DSGraph(funcTDGraph);
+
+ //const Function &F = *CI.getParent()->getParent();
+ //DSGraph &TDGraph = IPModRefObj.getAnalysis<TDDataStructures>().getDSGraph(F);
+
+
+ return Result;
+}
// Compute Mod/Ref bit vectors for a single call site.
// These are copies of the Read/Write flags from the nodes of
@@ -122,8 +133,7 @@
callSiteModRefInfo[&callInst] = callModRefInfo;
// Get a copy of the graph for the callee with the callee inlined
- const DSGraph* csgp = ResolveGraphForCallSite(funcTDGraph, callInst);
- assert(csgp && "Unable to compute callee mod/ref information");
+ DSGraph* csgp = ResolveCallSiteModRefInfo(callInst);
// For all nodes in the graph, extract the mod/ref information
const std::vector<DSNode*>& csgNodes = csgp->getNodes();
@@ -136,6 +146,7 @@
if (csgNodes[i]->isRead())
callModRefInfo->setNodeIsRef(getNodeId(origNodes[i]));
}
+ delete csgp;
}
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