message: [XLA:GPU] Change the option value for nvptx-prec-divf32 to use div.full instead
  of div.approx.
  This is because div.approx produces incorrect result when the divisor is beyond
  the range of [2^-126, 2^126]. A test case is not added in this CL because of an
  ongoing work to make exhaustive_op_test work for binary operations.
diff: @@ -459,8 +459,9 @@ void GPUBackendInit(const HloModuleConfig& hlo_module_config) {
  // between those loads.
  FeedLLVMWithFlags({"-memdep-block-scan-limit=500"});
  - // Use div.approx -- it matters for some float-division heavy benchmarks.
  - FeedLLVMWithFlags({"-nvptx-prec-divf32=0"});
  + // Use div.full -- it matters for some float-division heavy benchmarks.
  + // Using div.approx produces incorrect result for float32(max)/float32(max).
  + FeedLLVMWithFlags({"-nvptx-prec-divf32=1"});
  llvm_ir::InitializeLLVMCommandLineOptions(hlo_module_config);
  