Re: [PATCH ftrace.git] Immedate Values Optimized Jump Fix

From: H. Peter Anvin
Date: Fri Jul 18 2008 - 19:39:00 EST

Mathieu Desnoyers wrote:

The generated code you are talking about will generate a different code
pattern, won't it (e.g. saving the registers on the stack before the
branch) ? And in this case, we fall-back on the standard immediate

Not necessarily, and you *certainly* can't rely on pattern analysis to determine when it's unsafe.

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