[llvm-commits] CVS: llvm/lib/Transforms/Scalar/LICM.cpp

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Scalar:

LICM.cpp updated: 1.12 -> 1.13

---
Log message:

Loop invariant code motion now depends on the LoopPreheader pass.  Dead code
has not yet been removed.


---
Diffs of the changes:

Index: llvm/lib/Transforms/Scalar/LICM.cpp
diff -u llvm/lib/Transforms/Scalar/LICM.cpp:1.12 llvm/lib/Transforms/Scalar/LICM.cpp:1.13
--- llvm/lib/Transforms/Scalar/LICM.cpp:1.12	Tue Sep 10 17:38:47 2002
+++ llvm/lib/Transforms/Scalar/LICM.cpp	Thu Sep 26 11:19:31 2002
@@ -42,6 +42,7 @@
     // This transformation requires natural loop information...
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.preservesCFG();
+      AU.addRequiredID(LoopPreheadersID);
       AU.addRequired<LoopInfo>();
       AU.addRequired<AliasAnalysis>();
     }
@@ -104,11 +105,7 @@
     }
     void visitShiftInst(ShiftInst &I) { visitBinaryOperator((Instruction&)I); }
 
-    void visitLoadInst(LoadInst &LI) {
-      if (isLoopInvariant(LI.getOperand(0)) &&
-          !pointerInvalidatedByLoop(LI.getOperand(0)))
-        hoist(LI);
-    }
+    void visitLoadInst(LoadInst &LI);
 
     void visitGetElementPtrInst(GetElementPtrInst &GEPI) {
       Instruction &I = (Instruction&)GEPI;
@@ -274,6 +271,14 @@
   }
 
   Changed = true;
+}
+
+
+void LICM::visitLoadInst(LoadInst &LI) {
+  if (isLoopInvariant(LI.getOperand(0)) &&
+      !pointerInvalidatedByLoop(LI.getOperand(0)))
+    hoist(LI);
+
 }
 
 // pointerInvalidatedByLoop - Return true if the body of this loop may store