Before doing fdiv optimization to convert to inv+mul, checking

if the instruction allows reciprocal.

Change-Id: I260cf0af65ea39c3c5f9a6c8923677af6fc11c72

Author: srividyakarumuri

IGC/Compiler/CustomUnsafeOptPass.cpp

@@ -1663,10 +1663,13 @@ void CustomUnsafeOptPass::visitBinaryOperator(BinaryOperator &I)
                             {
                                 if (!(fp0 && fp0->isExactlyValue(1.0)))
                                 {
-                                    Value *invOp = copyIRFlags(BinaryOperator::CreateFDiv(ConstantFP::get(opType, 1.0), op1, "", &I), &I);
-                                    I.replaceAllUsesWith(
-                                        copyIRFlags(BinaryOperator::CreateFMul(op0, invOp, "", &I), &I));
-                                    patternFound = true;
+                                    if (m_ctx->getModuleMetaData()->compOpt.FastRelaxedMath || I.hasAllowReciprocal())
+                                    {
+                                        Value *invOp = copyIRFlags(BinaryOperator::CreateFDiv(ConstantFP::get(opType, 1.0), op1, "", &I), &I);
+                                        I.replaceAllUsesWith(
+                                            copyIRFlags(BinaryOperator::CreateFMul(op0, invOp, "", &I), &I));
+                                        patternFound = true;
+                                    }
                                 }
                             }
                         }