[mlir] Initial MLIR VP intrinsic integration test on host and RVV emulator.

This patch adds the initial VP intrinsic integration test on the host backend and RVV emulator. Please see more detailed [discussion on the discourse](https://discourse.llvm.org/t/mlir-vp-ops-on-rvv-backend-integration-test-and-issues-report/66343).

- Run the test cases on the host by configuring the CMake option: `-DMLIR_INCLUDE_INTEGRATION_TESTS=ON`
- Build the RVV environment and run the test cases on RVV QEMU by [this doc](https://gist.github.com/zhanghb97/ad44407e169de298911b8a4235e68497).

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D137816

mlir/test/Integration/Dialect/LLVMIR/CPU/lit.local.cfg

@@ -3,3 +3,20 @@ import sys
 # No JIT on win32.
 if sys.platform == 'win32':
     config.unsupported = True
+
+lli_cmd = 'lli'
+if config.riscv_emulator_lli_executable:
+    lli_cmd = config.riscv_emulator_lli_executable
+
+config.substitutions.append(('%mlir_native_utils_lib_dir',
+    config.riscv_emulator_utils_lib_dir or config.mlir_lib_dir))
+
+if config.riscv_vector_emulator_executable:
+    # Run test in qemu emulator.
+    emulation_cmd = config.riscv_vector_emulator_executable
+    if config.riscv_vector_emulator_options:
+        emulation_cmd = emulation_cmd + ' ' + config.riscv_vector_emulator_options
+    emulation_cmd = emulation_cmd + ' ' + lli_cmd + ' --march=riscv64 -mattr=+v '
+    config.substitutions.append(('%lli', emulation_cmd))
+else:
+    config.substitutions.append(('%lli', lli_cmd))

mlir/test/Integration/Dialect/LLVMIR/CPU/test-vp-intrinsic.mlir

@@ -0,0 +1,32 @@
+// RUN: mlir-opt %s -convert-vector-to-llvm -convert-memref-to-llvm \
+// RUN:             -convert-func-to-llvm -reconcile-unrealized-casts | \
+// RUN: mlir-translate -mlir-to-llvmir | \
+// RUN: %lli --entry-function=entry \
+// RUN:      --dlopen=%mlir_native_utils_lib_dir/libmlir_c_runner_utils%shlibext | \
+// RUN: FileCheck %s
+
+memref.global "private" @gv_i32 : memref<20xi32> =
+    dense<[0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+           10, 11, 12, 13, 14, 15, 16, 17, 18, 19]>
+
+func.func @entry() -> i32 {
+  %c0 = arith.constant 0 : index
+  %c10 = arith.constant 10 : index
+  %mem_i32 = memref.get_global @gv_i32 : memref<20xi32>
+  // When the vectors are defined as dense constant vector,
+  // the vp intrinsic will be optimized/eliminated on some backend (e.g. X86).
+  // So this test case loads the vector from a memref to test the vp intrinsic
+  // backend support.
+  %vec1 = vector.load %mem_i32[%c0] : memref<20xi32>, vector<8xi32>
+  %vec2 = vector.load %mem_i32[%c10] : memref<20xi32>, vector<8xi32>
+  %mask = arith.constant dense<[1, 0, 1, 0, 1, 0, 1, 0]> : vector<8xi1>
+  %evl = arith.constant 4 : i32
+
+  %res = "llvm.intr.vp.add" (%vec1, %vec2, %mask, %evl) :
+         (vector<8xi32>, vector<8xi32>, vector<8xi1>, i32) -> vector<8xi32>
+  vector.print %res : vector<8xi32>
+  // CHECK: ( 10, {{.*}}, 14, {{.*}}, {{.*}}, {{.*}}, {{.*}}, {{.*}} )
+
+  %ret = arith.constant 0 : i32
+  return %ret : i32
+}

mlir/test/lit.site.cfg.py.in

@@ -36,12 +36,17 @@ config.intel_sde_executable = "@INTEL_SDE_EXECUTABLE@"
 config.mlir_run_amx_tests = @MLIR_RUN_AMX_TESTS@
 config.mlir_run_arm_sve_tests = @MLIR_RUN_ARM_SVE_TESTS@
 config.mlir_run_x86vector_tests = @MLIR_RUN_X86VECTOR_TESTS@
+config.mlir_run_riscv_vector_tests = "@MLIR_RUN_RISCV_VECTOR_TESTS@"
 config.mlir_run_cuda_tensor_core_tests = @MLIR_RUN_CUDA_TENSOR_CORE_TESTS@
 config.mlir_include_integration_tests = @MLIR_INCLUDE_INTEGRATION_TESTS@
 config.arm_emulator_executable = "@ARM_EMULATOR_EXECUTABLE@"
 config.arm_emulator_options = "@ARM_EMULATOR_OPTIONS@"
 config.arm_emulator_lli_executable = "@ARM_EMULATOR_LLI_EXECUTABLE@"
 config.arm_emulator_utils_lib_dir = "@ARM_EMULATOR_UTILS_LIB_DIR@"
+config.riscv_vector_emulator_executable = "@RISCV_VECTOR_EMULATOR_EXECUTABLE@"
+config.riscv_vector_emulator_options = "@RISCV_VECTOR_EMULATOR_OPTIONS@"
+config.riscv_emulator_lli_executable = "@RISCV_EMULATOR_LLI_EXECUTABLE@"
+config.riscv_emulator_utils_lib_dir = "@RISCV_EMULATOR_UTILS_LIB_DIR@"
 
 import lit.llvm
 lit.llvm.initialize(lit_config, config)