[llvm-commits] [llvm] r48509 - in /llvm/trunk: lib/Analysis/IPA/Andersens.cpp test/Analysis/Andersens/modreftest2.ll
Daniel Berlin
dberlin at dberlin.org
Tue Mar 18 15:22:53 PDT 2008
Author: dannyb
Date: Tue Mar 18 17:22:53 2008
New Revision: 48509
URL: http://llvm.org/viewvc/llvm-project?rev=48509&view=rev
Log:
Fix PR 2160 by making sure arguments to external functions get marked as pointing to anything
Added:
llvm/trunk/test/Analysis/Andersens/modreftest2.ll
Modified:
llvm/trunk/lib/Analysis/IPA/Andersens.cpp
Modified: llvm/trunk/lib/Analysis/IPA/Andersens.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/IPA/Andersens.cpp?rev=48509&r1=48508&r2=48509&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/IPA/Andersens.cpp (original)
+++ llvm/trunk/lib/Analysis/IPA/Andersens.cpp Tue Mar 18 17:22:53 2008
@@ -647,9 +647,13 @@
if (N1->PointsTo->empty())
return NoModRef;
-
+#if FULL_UNIVERSAL
+ if (!UniversalSet->PointsTo->test(FindNode(getNode(P))))
+ return NoModRef; // Universal set does not contain P
+#else
if (!N1->PointsTo->test(UniversalSet))
return NoModRef; // P doesn't point to the universal set.
+#endif
}
return AliasAnalysis::getModRefInfo(CS, P, Size);
@@ -1266,29 +1270,43 @@
}
CallSite::arg_iterator ArgI = CS.arg_begin(), ArgE = CS.arg_end();
+ bool external = !F || F->isDeclaration();
if (F) {
// Direct Call
Function::arg_iterator AI = F->arg_begin(), AE = F->arg_end();
- for (; AI != AE && ArgI != ArgE; ++AI, ++ArgI)
- if (isa<PointerType>(AI->getType())) {
- if (isa<PointerType>((*ArgI)->getType())) {
- // Copy the actual argument into the formal argument.
- Constraints.push_back(Constraint(Constraint::Copy, getNode(AI),
- getNode(*ArgI)));
- } else {
- Constraints.push_back(Constraint(Constraint::Copy, getNode(AI),
- UniversalSet));
- }
- } else if (isa<PointerType>((*ArgI)->getType())) {
+ for (; AI != AE && ArgI != ArgE; ++AI, ++ArgI)
+ {
+#if !FULL_UNIVERSAL
+ if (external && isa<PointerType>((*ArgI)->getType()))
+ {
+ // Add constraint that ArgI can now point to anything due to
+ // escaping, as can everything it points to. The second portion of
+ // this should be taken care of by universal = *universal
+ Constraints.push_back(Constraint(Constraint::Copy,
+ getNode(*ArgI),
+ UniversalSet));
+ }
+#endif
+ if (isa<PointerType>(AI->getType())) {
+ if (isa<PointerType>((*ArgI)->getType())) {
+ // Copy the actual argument into the formal argument.
+ Constraints.push_back(Constraint(Constraint::Copy, getNode(AI),
+ getNode(*ArgI)));
+ } else {
+ Constraints.push_back(Constraint(Constraint::Copy, getNode(AI),
+ UniversalSet));
+ }
+ } else if (isa<PointerType>((*ArgI)->getType())) {
#if FULL_UNIVERSAL
- Constraints.push_back(Constraint(Constraint::Copy,
- UniversalSet,
- getNode(*ArgI)));
+ Constraints.push_back(Constraint(Constraint::Copy,
+ UniversalSet,
+ getNode(*ArgI)));
#else
- Constraints.push_back(Constraint(Constraint::Copy,
- getNode(*ArgI),
- UniversalSet));
+ Constraints.push_back(Constraint(Constraint::Copy,
+ getNode(*ArgI),
+ UniversalSet));
#endif
+ }
}
} else {
//Indirect Call
Added: llvm/trunk/test/Analysis/Andersens/modreftest2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/Andersens/modreftest2.ll?rev=48509&view=auto
==============================================================================
--- llvm/trunk/test/Analysis/Andersens/modreftest2.ll (added)
+++ llvm/trunk/test/Analysis/Andersens/modreftest2.ll Tue Mar 18 17:22:53 2008
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | opt -anders-aa -gvn | llvm-dis \
+; RUN: | not grep {ret i32 undef}
+
+;; From PR 2160
+declare void @f(i32*)
+
+define i32 @g() {
+entry:
+ %tmp = alloca i32 ; <i32*> [#uses=2]
+ call void @f( i32* %tmp )
+ %tmp2 = load i32* %tmp ; <i32> [#uses=1]
+ ret i32 %tmp2
+}
+
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