From 21e69c0740ac29342c4c0a2762bcc1460bffffa8 Mon Sep 17 00:00:00 2001
From: Paul Kippes <paul.m.kippes@intel.com>
Date: Tue, 19 Sep 2023 21:20:59 +0000
Subject: [PATCH]  Remove noinf for fdiv by 0 in FastMath Handling

Remove noinf for fdiv by 0 in FastMathConstantHandling pass
---
 IGC/AdaptorCommon/FastMathConstantHandling.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/IGC/AdaptorCommon/FastMathConstantHandling.cpp b/IGC/AdaptorCommon/FastMathConstantHandling.cpp
index ae7ac9a1669d..8aecdba732e2 100644
--- a/IGC/AdaptorCommon/FastMathConstantHandling.cpp
+++ b/IGC/AdaptorCommon/FastMathConstantHandling.cpp
@@ -30,6 +30,7 @@ class FastMathConstantHandling : public FunctionPass, public InstVisitor<FastMat
 #if LLVM_VERSION_MAJOR >= 10
     void visitFNeg(Instruction& I);
 #endif
+    void visitFDiv(Instruction& I);
     virtual llvm::StringRef getPassName() const override { return "Fast Math Constant Handling"; }
 
     void getAnalysisUsage(AnalysisUsage& AU) const override
@@ -102,6 +103,15 @@ void FastMathConstantHandling::visitFNeg(Instruction& I)
 }
 #endif
 
+void FastMathConstantHandling::visitFDiv(Instruction& I)
+{
+    if (auto* fp_val = dyn_cast<llvm::ConstantFP>(I.getOperand(1));
+        fp_val && fp_val->getValueAPF().isZero())
+    {
+         I.setHasNoInfs(false);
+    }
+}
+
 bool FastMathConstantHandling::runOnFunction(Function& F)
 {
     if (IGC_IS_FLAG_DISABLED(DisableFastMathConstantHandling))