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

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Scalar:

LICM.cpp updated: 1.68 -> 1.69
---
Log message:

Allow hoisting loads of globals and alloca's in conditionals.


---
Diffs of the changes:  (+6 -0)

Index: llvm/lib/Transforms/Scalar/LICM.cpp
diff -u llvm/lib/Transforms/Scalar/LICM.cpp:1.68 llvm/lib/Transforms/Scalar/LICM.cpp:1.69
--- llvm/lib/Transforms/Scalar/LICM.cpp:1.68	Fri Nov 26 15:20:09 2004
+++ llvm/lib/Transforms/Scalar/LICM.cpp	Mon Nov 29 15:26:12 2004
@@ -592,6 +592,12 @@
   if (Inst.getParent() == CurLoop->getHeader())
     return true;
 
+  // It's always safe to load from a global or alloca.
+  if (isa<LoadInst>(Inst))
+    if (isa<AllocationInst>(Inst.getOperand(0)) ||
+        isa<GlobalVariable>(Inst.getOperand(0)))
+      return true;
+
   // Get the exit blocks for the current loop.
   std::vector<BasicBlock*> ExitBlocks;
   CurLoop->getExitBlocks(ExitBlocks);