Set fastmath only for math Intrinsic

Set fastmath only for math Intrinsic

Author: Jay-Jiewu-Lu

IGC/Compiler/Optimizer/OCLBIUtils.cpp

@@ -59,8 +59,10 @@ void CCommand::replaceCallInst(IGCLLVM::Intrinsic intrinsicName, ArrayRef<Type*>
     Function* func = getFunctionDeclaration(intrinsicName, Tys);
     Instruction* newCall = CallInst::Create(func, m_args, m_pCallInst->getName(), m_pCallInst);
 
-    if (auto II = dyn_cast<IntrinsicInst>(newCall)) {
-        II->copyFastMathFlags(m_pCallInst->getFastMathFlags());
+    if (isa<FPMathOperator>(m_pCallInst)) {
+        if (auto II = dyn_cast<IntrinsicInst>(newCall)) {
+            II->copyFastMathFlags(m_pCallInst->getFastMathFlags());
+        }
     }
 
     newCall->setDebugLoc(m_DL);