Call SimplifyFDivInst() in InstCombiner::visitFDiv().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124535 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/InstCombine/InstCombine.h b/lib/Transforms/InstCombine/InstCombine.h
index ef49790d148b3d1ac032ace5b35cd089ffe6f1a4..450e7f0a398bcb1ceec404f554b188aae45cd41a 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombine.h
+++ b/lib/Transforms/InstCombine/InstCombine.h
@@ -118,6 +118,7 @@ public:
   Instruction *commonIDivTransforms(BinaryOperator &I);
   Instruction *visitUDiv(BinaryOperator &I);
   Instruction *visitSDiv(BinaryOperator &I);
+  Instruction *visitFDiv(BinaryOperator &I);
   Value *FoldAndOfICmps(ICmpInst *LHS, ICmpInst *RHS);
   Value *FoldAndOfFCmps(FCmpInst *LHS, FCmpInst *RHS);
   Instruction *visitAnd(BinaryOperator &I);

diff --git a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
index 32b2a0ac0eea607fadbc863032f76dfb87f401c8..035ee721bfdf73d215bd1d64a4aa7678976a1502 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
+++ b/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
@@ -473,6 +473,15 @@ Instruction *InstCombiner::visitSDiv(BinaryOperator &I) {
   return 0;
 }
 
+Instruction *InstCombiner::visitFDiv(BinaryOperator &I) {
+  Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1);
+
+  if (Value *V = SimplifyFDivInst(Op0, Op1, TD))
+    return ReplaceInstUsesWith(I, V);
+
+  return 0;
+}
+
 /// This function implements the transforms on rem instructions that work
 /// regardless of the kind of rem instruction it is (urem, srem, or frem). It 
 /// is used by the visitors to those instructions.