[llvm] [HLSL] [DirectX] translate llvm fast math flags to llvm 3.7 fast math flags (PR #122025)

[Chris B via llvm-commits]

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@@ -759,10 +759,6 @@ uint64_t DXILBitcodeWriter::getOptimizationFlags(const Value *V) {
       Flags |= bitc::NoSignedZeros;
     if (FPMO->hasAllowReciprocal())
       Flags |= bitc::AllowReciprocal;
-    if (FPMO->hasAllowContract())
-      Flags |= bitc::AllowContract;
-    if (FPMO->hasApproxFunc())
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llvm-beanz wrote:

ApproxFunc has no equivalent in LLVM 3.7 so there is no bitcode representation of it. We have no choice but to drop it.

https://github.com/llvm/llvm-project/pull/122025