Deleuze and Guattari take up the illocutionary. Here’s an extended quote: The theory of the performative sphere, and the broader sphere of the illocutionary, has had three important and immediate consequences: (1) It has made it impossible to conceive of language as a code, since a code is the condition of possibility for all explanation. It has also made it impossible to conceive of speech as the communication of information: to order, question, promise, or affirm is not to inform someone about a command, doubt, engagement, or assertion but to effectuate these specific, immanent, and necessarily implicit acts. (2) It has made it impossible to define semantics, syntactics, or even phonematics as scientific zones of language independent of pragmatics. Pragmatics ceases to be a “trash heap,” pragmatic determinations cease to be subject to the alternative: fall outside language, or answer to explicit conditions that syntacticize and semanticize pragmatic determinations. Instead, pragmatics becomes the presupposition behind all of the other dimensions and insinuates itself into everything. (3) It makes it impossible to maintain the distinction between language and speech because speech can no longer be defined simply as the extrinsic and individual use of a primary signification, or the variable application of a preexisting syntax. Quite the opposite, the meaning and syntax of language can no longer be defined independently of the speech acts they presuppose. (77-8)