[Fix][TIR] Fix dtype issues for match_buffer and ramp node

python/tvm/script/ir_builder/tir/ir.py

@@ -316,7 +316,8 @@ def match_buffer(
             raise ValueError("Shape must be specified when binding input param")
     shape = (shape,) if isinstance(shape, (PrimExpr, Integral)) else shape
     if strides is not None:
-        strides = [Var(s, "int32") if isinstance(s, str) else s for s in strides]
+        idx_dtype = shape[0].dtype if isinstance(shape[0], PrimExpr) else "int32"
+        strides = [Var(s, idx_dtype) if isinstance(s, str) else s for s in strides]
     else:
         strides = []
     return _ffi_api.MatchBuffer(  # type: ignore[attr-defined] # pylint: disable=no-member

python/tvm/tir/op.py

@@ -1062,7 +1062,6 @@ def ptx_mma(
     saturate : bool
         The optional saturation at the output.
 
-
     operator : Optional[Literal["xor", "and"]]
         The 1-bit operator.
 

src/tir/ir/expr.cc

@@ -433,7 +433,9 @@ Ramp::Ramp(PrimExpr base, PrimExpr stride, int lanes, Span span) {
   ICHECK(base.dtype().is_scalar());
   ICHECK(stride.dtype().is_scalar());
   ICHECK_GT(lanes, 1);
-  ICHECK_EQ(stride.dtype(), base.dtype());
+  if (stride.dtype() != base.dtype()) {
+    stride = cast(base.dtype(), stride);
+  }
 
   ObjectPtr<RampNode> node = make_object<RampNode>();
   node->dtype = base.dtype().with_lanes(lanes);

tests/python/unittest/test_tvmscript_roundtrip.py

@@ -3331,6 +3331,14 @@ def buffer_ramp_access(a: T.handle, b: T.handle, c: T.handle) -> None:
     return buffer_ramp_access
 
 
+def ramp_int64():
+    @T.prim_func
+    def func() -> None:
+        T.evaluate(T.Ramp(T.int64(0), 1, 3))
+
+    return func
+
+
 def let_expression():
     @T.prim_func
     def func():
@@ -3346,6 +3354,7 @@ def test_void_ptr_vs_handle():
     In the future, perhaps these should be de-duplicated by forbidding
     one of the two C++ representations.
     """
+
     # Generates PointerType(PrimType(DataType::Void()))
     @T.prim_func
     def void_ptr(out_ret_value: T.handle("void")):
@@ -3622,6 +3631,21 @@ def main(a: T.handle, b: T.handle):
     return main
 
 
+def string_stride_int64():
+    @T.prim_func
+    def main(a: T.handle, b: T.handle):
+        T.func_attr({"from_legacy_te_schedule": True, "global_symbol": "main", "tir.noalias": True})
+        n = T.int64()
+        A_s0 = T.int64()
+        B_s0 = T.int64()
+        A = T.match_buffer(a, (n,), strides=(A_s0,), buffer_type="auto")
+        B = T.match_buffer(b, (n,), strides=(B_s0,), buffer_type="auto")
+        for i in range(n):
+            B[i] = A[i]
+
+    return main
+
+
 def merge_shape_var_def():
     @T.prim_func
     def main(A: T.handle, B: T.handle):
@@ -4013,6 +4037,7 @@ def func():
     pointer_type,
     buffer_axis_separator,
     buffer_ramp_access_as_slice_index,
+    ramp_int64,
     let_expression,
     void_ptr,
     decl_buffer,
@@ -4035,6 +4060,7 @@ def func():
     let_stmt_var,
     let_stmt_value,
     string_stride,
+    string_stride_int64,
     merge_shape_var_def,
     if_then_else_var,
     tvm_shfl_builtins,