add a comment, make a check more lenient

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22581 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-02 02:52:02 +00:00
parent e9100c69cb
commit 7e608bbb5d

View File

@ -71,6 +71,9 @@ namespace {
const TargetData *TD;
const Type *UIntPtrTy;
bool Changed;
/// MaxTargetAMSize - This is the maximum power-of-two scale value that the
/// target can handle for free with its addressing modes.
unsigned MaxTargetAMSize;
/// IVUsesByStride - Keep track of all uses of induction variables that we
@ -649,9 +652,8 @@ void LoopStrengthReduce::runOnLoop(Loop *L) {
// compared against some value to decide loop termination.
if (PN->hasOneUse()) {
BinaryOperator *BO = dyn_cast<BinaryOperator>(*(PN->use_begin()));
if (BO && BO->getOpcode() == Instruction::Add)
if (BO->hasOneUse()) {
if (PN == dyn_cast<PHINode>(*(BO->use_begin()))) {
if (BO && BO->hasOneUse()) {
if (PN == *(BO->use_begin())) {
DeadInsts.insert(BO);
// Break the cycle, then delete the PHI.
PN->replaceAllUsesWith(UndefValue::get(PN->getType()));