Move "IgnoreNaN" setting from DriverInfo to context (compilation option).

Change-Id: Ied9bba8ce983e1ba7ce6aad7a58013be73049f5a

Author: mmerecki

IGC/Compiler/CISACodeGen/DriverInfo.hpp

@@ -95,9 +95,6 @@ namespace IGC
         /// The driver implements single instance vertex dispatch feature
         virtual bool SupportsSingleInstanceVertexDispatch() const { return false; }
 
-        /// We can safely ignore Nan
-        virtual bool IgnoreNan() const { return false; }
-
         // Allow branch swapping for better Nan perf
         virtual bool BranchSwapping() const { return false; }
 

IGC/Compiler/CISACodeGen/GenIRLowering.cpp

@@ -286,9 +286,6 @@ bool GenIRLowering::runOnFunction(Function& F) {
     if (FII == MDU->end_FunctionsInfo())
         return false;
 
-    CodeGenContextWrapper* pCtxWrapper = &getAnalysis<CodeGenContextWrapper>();
-    CodeGenContext* ctx = pCtxWrapper->getCodeGenContext();
-
     auto &DL = F.getParent()->getDataLayout();
 
     BuilderTy TheBuilder(F.getContext(), TargetFolder(DL));
@@ -397,7 +394,7 @@ bool GenIRLowering::runOnFunction(Function& F) {
                 break;
             case Instruction::Select:
                 // Enable the pattern match only when NaNs can be ignored.
-                if (ctx->m_DriverInfo.IgnoreNan() ||
+                if (modMD->compOpt.NoNaNs ||
                     modMD->compOpt.FiniteMathOnly)
                 {
                     Changed |= combineSelectInst(cast<SelectInst>(Inst), BI);

IGC/Compiler/CISACodeGen/ShaderCodeGen.cpp

@@ -626,7 +626,7 @@ namespace IGC
 
         // TODO: move to use instruction flags
         // to figure out if we need to preserve Nan
-        bool preserveNan = !ctx.m_DriverInfo.IgnoreNan();
+        bool preserveNan = !ctx.getCompilerOption().NoNaNs;
 
         // Legalizer does not handle constant expressions
         mpm.add(new BreakConstantExpr());

IGC/Compiler/CustomSafeOptPass.cpp

@@ -1725,7 +1725,7 @@ void GenSpecificPattern::visitCmpInst(CmpInst& I)
     else
     {
         CodeGenContext* pCtx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
-        if (pCtx->m_DriverInfo.IgnoreNan())
+        if (pCtx->getCompilerOption().NoNaNs)
         {
             if (I.getPredicate() == CmpInst::FCMP_ORD)
             {

IGC/Compiler/CustomUnsafeOptPass.cpp

@@ -1996,7 +1996,7 @@ void CustomUnsafeOptPass::visitFCmpInst(FCmpInst& FC)
     }
     if (FC.getPredicate() == CmpInst::FCMP_UNO)
     {
-        if (m_ctx->m_DriverInfo.IgnoreNan())
+        if (m_ctx->getCompilerOption().NoNaNs)
         {
             FC.replaceAllUsesWith(ConstantInt::getFalse(FC.getType()));
             FC.eraseFromParent();
@@ -2006,7 +2006,7 @@ void CustomUnsafeOptPass::visitFCmpInst(FCmpInst& FC)
     }
     else if (FC.getPredicate() == CmpInst::FCMP_ORD)
     {
-        if (m_ctx->m_DriverInfo.IgnoreNan())
+        if (m_ctx->getCompilerOption().NoNaNs)
         {
             FC.replaceAllUsesWith(ConstantInt::getTrue(FC.getType()));
             FC.eraseFromParent();

IGC/common/MDFrameWork.h

@@ -190,6 +190,7 @@ namespace IGC
         bool OptDisable                                 = false;
         bool MadEnable                                  = false;
         bool NoSignedZeros                              = false;
+        bool NoNaNs                                     = false;
 
         // default rounding modes
         unsigned FloatRoundingMode                      = IGC::ROUND_TO_NEAREST_EVEN;