Lines Matching defs:IV

88 STATISTIC(NumElimExt     , "Number of IV sign/zero extends eliminated");
215   // Check IV increment. Reject this PN if increment operation is not
248   // of the loop.  If not, the new IV can overflow and no one will notice.
314     // exactly land on the exit value, otherwise the IV condition will wrap
315     // around and do things the fp IV wouldn't.
321     // transform the IV.
340     // exactly land on the exit value, otherwise the IV condition will wrap
341     // around and do things the fp IV wouldn't.
347     // transform the IV.
388   // variable, we chose to eliminate the IV and rewrite it in terms of an
418   // If the loop previously had floating-point IV, ScalarEvolution
503 //  IV Widening - Extend the width of an IV to cover its widest uses.
508 /// the IV before actually widening it.
549   // We extend the IV to satisfy the sign of its user(s), or 'signed'
557 //  Live IV Reduction - Minimize IVs live across the loop.
561 //  Simplification of IV users based on SCEV evaluation.
574   IndVarSimplifyVisitor(PHINode *IV, ScalarEvolution *SCEV,
577     : SE(SCEV), TTI(TTI), IVPhi(IV) {
588 /// Iteratively perform simplification on a worklist of IV users. Each
592 /// Sign/Zero extend elimination is interleaved with IV simplification.
612     // Evaluate as many IV expressions as possible before widening any IVs. This
671     // An IV counter must preserve its type.
741   // Look for a simple IV counter LHS
754   // Do LFTR if the exit condition's IV is *not* a simple counter.
877     // iteration where said IV produces poison.  Our strategy here differs for
888       // Don't force a live loop counter if another IV can be used.
910 /// Insert an IR expression which computes the value held by the IV IndVar
921   // For integer IVs, truncate the IV before computing the limit unless we
923   // bitwidth of the IV.  We prefer (potentially) keeping a truncate of the
924   // IV in the loop over a (potentially) expensive expansion of the widened
956   // Initialize CmpIndVar to the preincremented IV.
981   // only) or if LFTR switches to a different IV that was previously dynamically
987   // dynamically dead IV that wraps on the first loop iteration only, which is
988   // not covered by the post-inc addrec. (If the new IV was not dynamically
1021   // emit a truncate to narrow the IV to the ExitCount type.  This is safe
1036     const SCEV *IV = SE->getSCEV(CmpIndVar);
1037     const SCEV *TruncatedIV = SE->getTruncateExpr(IV, ExitCnt->getType());
1041     if (ZExtTrunc == IV) {
1048       if (SExtTrunc == IV) {
1220   // Replacing with the preheader value will often allow IV users to simplify
1380       // IV widening).
1428   // set of "interesting" IV users to include the icmp, but doing that
1895 //  IndVarSimplify driver. Manage several subpasses of IV simplification.
1926   // Eliminate redundant IV users.
1947   // Eliminate redundant IV cycles.