Prepare IGC for LLVM10

Change-Id: I47fa3cde96463652fc6cacaeaf10173c6ee96518

Author: lwesiers

IGC/Compiler/CustomSafeOptPass.cpp

@@ -2005,7 +2005,7 @@ void GenSpecificPattern::visitCastInst(CastInst& I)
         if ((srcVal = dyn_cast<Instruction>(srcVal->getOperand(0))))
         {
             // need fast math to know that we can ignore Nan
-            if (srcVal->isFast())
+            if (isa<FPMathOperator>(srcVal) && srcVal->isFast())
             {
                 IRBuilder<> builder(&I);
                 Function* func = Intrinsic::getDeclaration(

IGC/Compiler/Legalizer/InstLegalChecker.cpp

@@ -289,3 +289,9 @@ LegalizeAction InstLegalChecker::visitLandingPadInst(LandingPadInst&) {
     // FIXME: Do we support it?
     return Legal;
 }
+
+#if LLVM_VERSION_MAJOR >= 10
+LegalizeAction InstLegalChecker::visitFNeg(llvm::UnaryOperator& I) {
+    return Legal;
+}
+#endif

IGC/Compiler/Legalizer/InstLegalChecker.h

@@ -110,6 +110,9 @@ namespace IGC {
             LegalizeAction visitExtractValueInst(ExtractValueInst& I);
             LegalizeAction visitInsertValueInst(InsertValueInst& I);
             LegalizeAction visitLandingPadInst(LandingPadInst&);
+#if LLVM_VERSION_MAJOR >= 10
+            LegalizeAction visitFNeg(llvm::UnaryOperator& I);
+#endif
         };
 
     } // End Legalizer namespace