Changes in directory llvm/lib/Analysis/DataStructure:
Local.cpp updated: 1.143 -> 1.144
---
Log message:
revert this, this is safe, if conservative. leave a note to that effect
---
Diffs of the changes: (+7 -9)
Local.cpp | 16 +++++++---------
1 files changed, 7 insertions(+), 9 deletions(-)
Index: llvm/lib/Analysis/DataStructure/Local.cpp
diff -u llvm/lib/Analysis/DataStructure/Local.cpp:1.143
llvm/lib/Analysis/DataStructure/Local.cpp:1.144
--- llvm/lib/Analysis/DataStructure/Local.cpp:1.143 Wed Mar 15 13:03:16 2006
+++ llvm/lib/Analysis/DataStructure/Local.cpp Tue Apr 4 21:42:36 2006
@@ -546,17 +546,15 @@
case Intrinsic::vaend:
return; // noop
case Intrinsic::memcpy_i32:
- case Intrinsic::memcpy_i64: {
- //write first location
- if (DSNode *N = getValueDest(**CS.arg_begin()).getNode())
- N->setModifiedMarker();
- //and read second pointer
- if (DSNode *N = getValueDest(**(CS.arg_begin() + 1)).getNode())
- N->setReadMarker();
- return;
- }
+ case Intrinsic::memcpy_i64:
case Intrinsic::memmove_i32:
case Intrinsic::memmove_i64: {
+ //This is over aggressive. What these functions do is not make the
+ // targets pointers alias, but rather merge the out edges of the graphs
+ // for the pointers according to the type merging of the graphs.
+ //Simply merging the two graphs is a crude approximation to this.
+ //I might be wrong though.
+
// Merge the first & second arguments, and mark the memory read and
// modified.
DSNodeHandle RetNH = getValueDest(**CS.arg_begin());
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