Hi,

even at -O0 there may be a fair amount of DF computation performed when
compiling large units and part of it appears to be useless.

Bootstrapped/regtested on x86-64/Linux, OK for the mainline?


2022-10-06  Eric Botcazou  <ebotcazou@adacore.com>

	* function.cc (thread_prologue_and_epilogue_insns): Update only entry
	and exit blocks when not optimizing.  Remove dead statement.

-- 
Eric Botcazou