Remove UnsafeFPMath for LLVM 21+ (#8851)

Author: mcourteaux

src/CodeGen_Internal.cpp

@@ -612,7 +612,9 @@ void get_target_options(const llvm::Module &module, llvm::TargetOptions &options
 
     options = llvm::TargetOptions();
     options.AllowFPOpFusion = per_instruction_fast_math_flags ? llvm::FPOpFusion::Strict : llvm::FPOpFusion::Fast;
+#if LLVM_VERSION < 210
     options.UnsafeFPMath = !per_instruction_fast_math_flags;
+#endif
     options.NoInfsFPMath = !per_instruction_fast_math_flags;
     options.NoNaNsFPMath = !per_instruction_fast_math_flags;
     options.HonorSignDependentRoundingFPMathOption = !per_instruction_fast_math_flags;

src/CodeGen_PTX_Dev.cpp

@@ -614,7 +614,9 @@ vector<char> CodeGen_PTX_Dev::compile_to_src() {
 
     TargetOptions options;
     options.AllowFPOpFusion = FPOpFusion::Fast;
+#if LLVM_VERSION < 210
     options.UnsafeFPMath = true;
+#endif
     options.NoInfsFPMath = true;
     options.NoNaNsFPMath = true;
     options.HonorSignDependentRoundingFPMathOption = false;