add lit filecheck

.github/workflows/ci-pytest.yml

@@ -39,6 +39,9 @@ jobs:
     - name: Test with pytest
       run: |
         pytest -W error
+    - name: Test with lit
+      run: |
+        lit -v test/filecheck
 
     #- name: Execute lit tests
     #  run: |

requirements-dev.txt

@@ -1,3 +1,5 @@
 black==23.3.0
 pre-commit==3.2.2
 pytest==7.3.1
+filecheck==0.0.23
+lit==16.0.2

test/filecheck/.lit_test_times.txt

@@ -0,0 +1 @@
+8.836818e-02 hello-world.asm

test/filecheck/hello-world.asm

@@ -0,0 +1,15 @@
+// RUN: python3 -m riscemu -v %s | filecheck %s
+        .data
+msg:    .ascii "Hello world\n"
+        .text
+        addi    a0, zero, 1             // print to stdout
+        addi    a1, zero, msg           // load msg address
+        addi    a2, zero, 12            // write 12 bytes
+        addi    a7, zero, SCALL_WRITE   // write syscall code
+        scall
+        addi    a0, zero, 0             // set exit code to 0
+        addi    a7, zero, SCALL_EXIT    // exit syscall code
+        scall
+
+// CHECK: Hello world
+// CHECK: [CPU] Program exited with code 0

test/filecheck/lit.cfg

@@ -0,0 +1,10 @@
+import lit.formats
+import os
+
+config.test_source_root = os.path.dirname(__file__)
+xdsl_src = os.path.dirname(os.path.dirname(config.test_source_root))
+
+config.name = "riscemu"
+config.test_format = lit.formats.ShTest(preamble_commands=[f"cd {xdsl_src}"])
+config.suffixes = ['.asm']
+