jikechao commented on code in PR #15682:
URL: https://github.com/apache/tvm/pull/15682#discussion_r1319294898
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src/relay/transforms/simplify_expr.cc:
##########
@@ -326,6 +326,56 @@ static std::vector<int> GetTransposeAxisOrder(const Call&
call, int ndim) {
return std::move(attr_axes);
}
+/*!
+ * \brief SimplifyClipCastClip matches the pattern clip->cast->clip and fuse
clips based on Clip
+ * min/max values.
+ *
+ * Example:
+ * %1 = clip(%0, a_min=0f, a_max=255f) [type=int32]
+ * %2 = cast(%1, dtype="uint8") [type=uint8]
+ * %3 = clip(%2, a_min=20f, a_max=66f) [type=uint8]
+ *
+ * Optimized to (fuse Clips):
+ * %1 = clip(%0, a_min=20f, a_max=66f) [type=uint8]
+ * %2 = cast(%1, dtype="uint8") [type=uint8]
+ */
Review Comment:
BTW, this optimization behavior seems not thorough enough; It can be further
optimized to `%1 = clip(%0, a_min=20f, a_max=66f) [type=uint8]`.
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