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

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Scalar:

TailRecursionElimination.cpp updated: 1.21 -> 1.22
---
Log message:

Implement Transforms/TailCallElim/return-undef.ll, a trivial case
that has been sitting in my inbox since May 18. :)



---
Diffs of the changes:  (+1 -0)

 TailRecursionElimination.cpp |    1 +
 1 files changed, 1 insertion(+)


Index: llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
diff -u llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp:1.21 llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp:1.22
--- llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp:1.21	Mon Aug  8 14:11:57 2005
+++ llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp	Sat Nov  5 02:21:11 2005
@@ -342,6 +342,7 @@
   // constant, return the value returned by the tail call, or that are being
   // accumulator recursion variable eliminated.
   if (Ret->getNumOperands() != 0 && Ret->getReturnValue() != CI &&
+      !isa<UndefValue>(Ret->getReturnValue()) &&
       AccumulatorRecursionEliminationInitVal == 0 &&
       !getCommonReturnValue(Ret, CI))
     return false;