Ensure SourceInfo is preserved in inline pass and offsets are kepts

src/kirin/ir/group.py

@@ -216,7 +216,7 @@ def wrapper(py_func: Callable) -> Method:
                             f"`{py_func.__name__}` is already defined in the current scope and is not a Method."
                         )
 
-                lineno_offset = call_site_frame.f_lineno - 1
+                lineno_offset = py_func.__code__.co_firstlineno - 1
                 file = call_site_frame.f_code.co_filename
 
             code = self.lowering.python_function(py_func, lineno_offset=lineno_offset)

src/kirin/ir/nodes/stmt.py

@@ -267,6 +267,9 @@ def insert_after(self, stmt: Statement) -> None:
         self.parent = stmt.parent
         stmt._next_stmt = self
 
+        if self.source is None and stmt.source is not None:
+            self.source = stmt.source
+
         if self.parent:
             self.parent._stmt_len += 1
 
@@ -302,6 +305,9 @@ def insert_before(self, stmt: Statement) -> None:
         self.parent = stmt.parent
         stmt._prev_stmt = self
 
+        if self.source is None and stmt.source is not None:
+            self.source = stmt.source
+
         if self.parent:
             self.parent._stmt_len += 1
 
@@ -506,6 +512,7 @@ def from_stmt(
             attributes=attributes or other.attributes,
             result_types=[result.type for result in other._results],
             args_slice=other._name_args_slice,
+            source=other.source,
         )
         # inherit the hint:
         for result, other_result in zip(obj._results, other._results):

src/kirin/lowering/frame.py

@@ -75,9 +75,9 @@ def _push_stmt(self, stmt: StmtType) -> StmtType:
             raise BuildError(
                 f"Unsupported dialect `{stmt.dialect.name}` from statement {stmt.name}"
             )
-        self.curr_block.stmts.append(stmt)
         if stmt.source is None:
             stmt.source = self.state.source
+        self.curr_block.stmts.append(stmt)
         return stmt
 
     def _push_block(self, block: Block):

src/kirin/lowering/python/lowering.py

@@ -138,6 +138,7 @@ def lower_global(self, state: State[ast.AST], node: ast.AST) -> LoweringABC.Resu
     def visit(self, state: State[ast.AST], node: ast.AST) -> Result:
         if hasattr(node, "lineno"):
             state.source = SourceInfo.from_ast(node, state.file)
+            state.source.offset(state.lineno_offset, state.col_offset)
         name = node.__class__.__name__
         if name in self.registry.ast_table:
             return self.registry.ast_table[name].lower(state, node)
@@ -148,7 +149,8 @@ def generic_visit(self, state: State[ast.AST], node: ast.AST) -> Result:
 
     def visit_Call(self, state: State[ast.AST], node: ast.Call) -> Result:
         if hasattr(node.func, "lineno"):
-            state.source = SourceInfo.from_ast(node.func, state.file)
+            state.source = SourceInfo.from_ast(node, state.file)
+            state.source.offset(state.lineno_offset, state.col_offset)
 
         global_callee_result = state.get_global(node.func, no_raise=True)
         if global_callee_result is None:

src/kirin/rewrite/inline.py

@@ -97,6 +97,16 @@ def inline_call_like(
 
         # NOTE: we cannot change region because it may be used elsewhere
         inline_region: ir.Region = region.clone()
+
+        # Preserve source information by attributing inlined code to the call site
+        if call_like.source is not None:
+            for block in inline_region.blocks:
+                if block.source is None:
+                    block.source = call_like.source
+                for stmt in block.stmts:
+                    if stmt.source is None:
+                        stmt.source = call_like.source
+
         parent_block: ir.Block = call_like.parent_block
         parent_region: ir.Region = call_like.parent_region
 

test/ir/test_stmt.py

@@ -1,6 +1,7 @@
 import pytest
 
 from kirin.ir import Block
+from kirin.source import SourceInfo
 from kirin.dialects import py
 
 
@@ -50,3 +51,12 @@ def test_stmt_from_stmt():
     y = x.from_stmt(x)
 
     assert y.result.hints["const"] == py.constant.types.Int
+
+
+def test_stmt_from_stmt_preserves_source_info():
+    x = py.Constant(1)
+    x.source = SourceInfo(lineno=1, col_offset=0, end_lineno=None, end_col_offset=None)
+
+    y = x.from_stmt(x)
+    assert y.source == x.source
+    assert y.source is x.source

test/lowering/test_source_info.py

@@ -0,0 +1,36 @@
+import pytest
+
+from kirin.source import SourceInfo
+from kirin.prelude import basic_no_opt
+
+
+def get_line_of(target: str) -> int:
+    for i, line in enumerate(open(__file__), 1):
+        if target in line:
+            return i
+
+
+@pytest.mark.parametrize("similar", [True, False])
+def test_stmt_source_info(similar: bool):
+    @basic_no_opt
+    def test(x: int):
+        y = 2
+        a = 4**2
+        return y + 2 + a
+
+    if similar:
+        test = test.similar()
+
+    stmts = test.callable_region.blocks[0].stmts
+
+    def get_line_from_source_info(source: SourceInfo) -> int:
+        return source.lineno + source.lineno_begin
+
+    for stmt in stmts:
+        assert stmt.source.file == __file__
+
+    assert get_line_from_source_info(stmts.at(0).source) == get_line_of("y = 2")
+    assert get_line_from_source_info(stmts.at(2).source) == get_line_of("a = 4**2")
+    assert get_line_from_source_info(stmts.at(4).source) == get_line_of(
+        "return y + 2 + a"
+    )

test/passes/test_inline_pass.py

@@ -1,5 +1,6 @@
 from kirin.prelude import basic_no_opt
 from kirin.passes.inline import InlinePass
+from kirin.dialects.py.constant import Constant
 
 
 @basic_no_opt
@@ -40,3 +41,25 @@ def main_inline_pass2(x: int):
     assert a == b
 
     assert len(main_inline_pass2.callable_region.blocks[0].stmts) == 4
+
+
+def test_inline_preserves_source_info():
+    def get_line_of(target: str) -> int:
+        for i, line in enumerate(open(__file__), 1):
+            if target in line:
+                return i
+
+    @basic_no_opt
+    def main_inline_pass(x: int):
+        y = inline_func(x)
+        return y + 2
+
+    inline = InlinePass(main_inline_pass.dialects)
+    inline(main_inline_pass)
+
+    stmt = main_inline_pass.callable_region.blocks[0].stmts.at(0)
+    line = stmt.source.lineno + stmt.source.lineno_begin
+    assert stmt.value.data == 1
+    assert isinstance(stmt, Constant)
+
+    assert get_line_of("return x - 1") == line