Due to a problem in the Intel® Quartus® Prime Pro Edition software version 19.2 and earlier, the Intel® Quartus® Prime Timing Analyzer will ignore the timing constraints for the Intel® Arria® 10/Cyclone® 10 Hard IP for PCI Express* if you have a generate statement used in your VHDL or Verilog code to create the IP in your design. This problem occurs because the generate statement will create a “\” as the hierachy path that is not recognized by the Intel Arria 10/Cyclone 10 Hard IP for PCI Express* SDC (Synopsys* Design Constraint) files.
To work around this problem, download the Intel® Arria® 10/Cyclone® 10 Hard IP for PCI Express* SDC file and replace the altera_pci_express.sdc in <project_name>/<pcie_name>/altera_pcie_a10_hip/synth.
This problem is fixed beginning with the Intel® Quartus® Prime Pro Edition software version 19.3.