make clients have to know how to call getCallSiteDependencyFrom

[oota-llvm.git] / lib / Analysis / ScalarEvolutionExpander.cpp

diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index 593e27300d31bcd1377a15ef72c495374ef2129e..211f013c25c49f8577521a010eafc27e795ae21a 100644 (file)
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -129,6 +129,29 @@ Value *SCEVExpander::visitMulExpr(SCEVMulExpr *S) {
   return V;
 }
 
+Value *SCEVExpander::visitUDivExpr(SCEVUDivExpr *S) {
+  Value *LHS = expand(S->getLHS());
+  if (SCEVConstant *SC = dyn_cast<SCEVConstant>(S->getRHS())) {
+    const APInt &RHS = SC->getValue()->getValue();
+    if (RHS.isPowerOf2())
+      return InsertBinop(Instruction::LShr, LHS,
+                         ConstantInt::get(S->getType(), RHS.logBase2()),
+                         InsertPt);
+  }
+
+  Value *RHS = expand(S->getRHS());
+  return InsertBinop(Instruction::UDiv, LHS, RHS, InsertPt);
+}
+
+Value *SCEVExpander::visitSDivExpr(SCEVSDivExpr *S) {
+  // Do not fold sdiv into ashr, unless you know that LHS is positive. On
+  // negative values, it rounds the wrong way.
+
+  Value *LHS = expand(S->getLHS());
+  Value *RHS = expand(S->getRHS());
+  return InsertBinop(Instruction::SDiv, LHS, RHS, InsertPt);
+}
+
 Value *SCEVExpander::visitAddRecExpr(SCEVAddRecExpr *S) {
   const Type *Ty = S->getType();
   const Loop *L = S->getLoop();
@@ -228,17 +251,17 @@ Value *SCEVExpander::visitAddRecExpr(SCEVAddRecExpr *S) {
 
 Value *SCEVExpander::visitTruncateExpr(SCEVTruncateExpr *S) {
   Value *V = expand(S->getOperand());
-  return CastInst::createTruncOrBitCast(V, S->getType(), "tmp.", InsertPt);
+  return CastInst::CreateTruncOrBitCast(V, S->getType(), "tmp.", InsertPt);
 }
 
 Value *SCEVExpander::visitZeroExtendExpr(SCEVZeroExtendExpr *S) {
   Value *V = expand(S->getOperand());
-  return CastInst::createZExtOrBitCast(V, S->getType(), "tmp.", InsertPt);
+  return CastInst::CreateZExtOrBitCast(V, S->getType(), "tmp.", InsertPt);
 }
 
 Value *SCEVExpander::visitSignExtendExpr(SCEVSignExtendExpr *S) {
   Value *V = expand(S->getOperand());
-  return CastInst::createSExtOrBitCast(V, S->getType(), "tmp.", InsertPt);
+  return CastInst::CreateSExtOrBitCast(V, S->getType(), "tmp.", InsertPt);
 }
 
 Value *SCEVExpander::visitSMaxExpr(SCEVSMaxExpr *S) {