Changes in directory llvm/lib/Transforms/Scalar:
LoopStrengthReduce.cpp updated: 1.121 -> 1.122 --- Log message: Look through bitcast when finding IVs. (Chris' patch really.) --- Diffs of the changes: (+10 -0) LoopStrengthReduce.cpp | 10 ++++++++++ 1 files changed, 10 insertions(+) Index: llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp diff -u llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp:1.121 llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp:1.122 --- llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp:1.121 Tue Mar 20 16:54:54 2007 +++ llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp Sun Mar 25 22:01:27 2007 @@ -235,6 +235,16 @@ /// GetExpressionSCEV - Compute and return the SCEV for the specified /// instruction. SCEVHandle LoopStrengthReduce::GetExpressionSCEV(Instruction *Exp, Loop *L) { + // Pointer to pointer bitcast instructions return the same value as their + // operand. + if (BitCastInst *BCI = dyn_cast<BitCastInst>(Exp)) { + if (SE->hasSCEV(BCI) || !isa<Instruction>(BCI->getOperand(0))) + return SE->getSCEV(BCI); + SCEVHandle R = GetExpressionSCEV(cast<Instruction>(BCI->getOperand(0)), L); + SE->setSCEV(BCI, R); + return R; + } + // Scalar Evolutions doesn't know how to compute SCEV's for GEP instructions. // If this is a GEP that SE doesn't know about, compute it now and insert it. // If this is not a GEP, or if we have already done this computation, just let _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits