[llvm] [RISCV] Add scheduling model for mips p8700 CPU (PR #119885)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-devrel-x86-64` running on `ml-opt-devrel-x86-64-b2` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/175/builds/10485

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
30.382 [2108/64/1580] Building CXX object tools/llvm-rust-demangle-fuzzer/CMakeFiles/llvm-rust-demangle-fuzzer.dir/DummyDemanglerFuzzer.cpp.o
30.394 [2107/64/1581] Building Opts.inc...
30.414 [2106/64/1582] Building CXX object tools/llvm-special-case-list-fuzzer/CMakeFiles/llvm-special-case-list-fuzzer.dir/special-case-list-fuzzer.cpp.o
30.430 [2105/64/1583] Building CXX object tools/llvm-stress/CMakeFiles/llvm-stress.dir/llvm-stress.cpp.o
30.446 [2104/64/1584] Building Opts.inc...
30.462 [2103/64/1585] Building Opts.inc...
30.470 [2102/64/1586] Building Opts.inc...
30.478 [2101/64/1587] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/func-id-helper.cpp.o
30.494 [2100/64/1588] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/llvm-xray.cpp.o
30.522 [2099/64/1589] Building RISCVGenSubtargetInfo.inc...
FAILED: lib/Target/RISCV/RISCVGenSubtargetInfo.inc /b/ml-opt-devrel-x86-64-b1/build/lib/Target/RISCV/RISCVGenSubtargetInfo.inc 
cd /b/ml-opt-devrel-x86-64-b1/build && /b/ml-opt-devrel-x86-64-b1/build/bin/llvm-tblgen -gen-subtarget -I /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV -I/var/lib/buildbot/.local/lib/python3.7/site-packages/tensorflow/include -I/b/ml-opt-devrel-x86-64-b1/build/include -I/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/include -I /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCV.td --write-if-changed -o lib/Target/RISCV/RISCVGenSubtargetInfo.inc -d lib/Target/RISCV/RISCVGenSubtargetInfo.inc.d
Included from /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCV.td:49:
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVSchedMIPSP8700.td:20:5: error: Processor does not define resources for WriteFCvtF32ToF16
def MIPSP8700Model : SchedMachineModel {
    ^
30.522 [2099/63/1590] Linking CXX static library lib/libLLVMWebAssemblyDesc.a
30.522 [2099/62/1591] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-account.cpp.o
30.523 [2099/61/1592] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-color-helper.cpp.o
30.523 [2099/60/1593] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-converter.cpp.o
30.524 [2099/59/1594] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-extract.cpp.o
30.524 [2099/58/1595] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-fdr-dump.cpp.o
30.524 [2099/57/1596] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-graph-diff.cpp.o
30.525 [2099/56/1597] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-graph.cpp.o
30.525 [2099/55/1598] Linking CXX static library lib/libLLVMXCoreDisassembler.a
30.525 [2099/54/1599] Linking CXX static library lib/libLLVMXCoreDesc.a
30.525 [2099/53/1600] Building CXX object tools/llvm-xray/CMakeFiles/llvm-xray.dir/xray-registry.cpp.o
30.525 [2099/52/1601] Building WindresOpts.inc...
30.526 [2099/51/1602] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/ARMWinEHPrinter.cpp.o
30.526 [2099/50/1603] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/COFFDumper.cpp.o
30.526 [2099/49/1604] Building StripOpts.inc...
30.526 [2099/48/1605] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/COFFImportDumper.cpp.o
30.527 [2099/47/1606] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/ELFDumper.cpp.o
30.527 [2099/46/1607] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/llvm-readobj.cpp.o
30.528 [2099/45/1608] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/MachODumper.cpp.o
30.528 [2099/44/1609] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/ObjDumper.cpp.o
30.528 [2099/43/1610] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/WasmDumper.cpp.o
30.529 [2099/42/1611] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/Win64EHDumper.cpp.o
30.529 [2099/41/1612] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/WindowsResourceDumper.cpp.o
30.529 [2099/40/1613] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/XCOFFDumper.cpp.o
30.529 [2099/39/1614] Building CXX object tools/llvm-readobj/CMakeFiles/llvm-readobj.dir/llvm-readobj-driver.cpp.o
30.560 [2099/38/1615] Building CXX object tools/llvm-readtapi/CMakeFiles/llvm-readtapi.dir/llvm-readtapi.cpp.o
31.530 [2099/37/1616] Building X86GenRegisterInfo.inc...
32.295 [2099/36/1617] Building X86GenRegisterBank.inc...
33.029 [2099/35/1618] Building X86GenExegesis.inc...
33.265 [2099/34/1619] Building X86GenCallingConv.inc...
34.474 [2099/33/1620] Building X86GenMnemonicTables.inc...
34.815 [2099/32/1621] Building X86GenAsmWriter1.inc...
34.908 [2099/31/1622] Building X86GenAsmWriter.inc...

```

</details>

https://github.com/llvm/llvm-project/pull/119885