Changes in directory llvm/lib/CodeGen/SelectionDAG:
SelectionDAGISel.cpp updated: 1.106 -> 1.107
---
Log message:
Fix a problem with llvm-ranlib that (on some platforms) caused the archive
file to become corrupted due to interactions between mmap'd memory segments
and file descriptors closing. The problem is completely avoiding by using
a third temporary file.
Patch provided by Evan Jones
---
Diffs of the changes: (+30 -0)
SelectionDAGISel.cpp | 30 ++++++++++++++++++++++++++++++
1 files changed, 30 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.106
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.107
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.106 Tue Nov 29
00:21:05 2005
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Tue Nov 29 23:21:10 2005
@@ -1161,6 +1161,36 @@
}
void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) {
+#if 0
+ // If the size of the cpy/move/set is constant (known)
+ if (ConstantUInt* op3 = dyn_cast<ConstantUInt>(I.getOperand(3))) {
+ uint64_t size = op3->getValue();
+ switch (Op) {
+ case ISD::MEMSET:
+ if (size <= TLI.getMaxStoresPerMemSet()) {
+ if (ConstantUInt* op4 = dyn_cast<ConstantUInt>(I.getOperand(4))) {
+ uint64_t TySize = TLI.getTargetData().getTypeSize(Ty);
+ uint64_t align = op4.getValue();
+ while (size > align) {
+ size -=align;
+ }
+ Value *SrcV = I.getOperand(0);
+ SDOperand Src = getValue(SrcV);
+ SDOperand Ptr = getValue(I.getOperand(1));
+ DAG.setRoot(DAG.getNode(ISD::STORE, MVT::Other, getRoot(), Src, Ptr,
+ DAG.getSrcValue(I.getOperand(1))));
+ }
+ break;
+ }
+ break; // don't do this optimization, use a normal memset
+ case ISD::MEMMOVE:
+ case ISD::MEMCPY:
+ break; // FIXME: not implemented yet
+ }
+ }
+#endif
+
+ // Non-optimized version
std::vector<SDOperand> Ops;
Ops.push_back(getRoot());
Ops.push_back(getValue(I.getOperand(1)));
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