message: [KERNEL_GEN] Use 32-bit IndexType like Eigen.
diff: @@ -49,7 +49,9 @@ class GpuKernelToNVVMPass
  GPUModuleOp m = getOperation();
  OwningRewritePatternList patterns;
  - LLVMTypeConverter converter(m.getContext());
  + mlir::LowerToLLVMOptions llvm_opts;
  + llvm_opts.indexBitwidth = 32;
  + LLVMTypeConverter converter(m.getContext(), llvm_opts);
  populateStdToLLVMConversionPatterns(converter, patterns);
  populateGpuToNVVMConversionPatterns(converter, patterns);
  populateComplexToLLVMConversionPatterns(converter, patterns);
  