getting started changing the emitted code: at one instruction at function top

I'm just getting started changing the emitted code. Suppose I want to
just add one new instruction to the function prologue at the top.
Where would I do this? Does it depend on the backend? I'm targeting
RISCV64.

Gry

Hi Gry,

Yes, this depends on the backend. You'll want to look at your backend's *FrameLowering::emitPrologue function (in lib/Target/*/*FrameLowering.cpp).

-Hal

I can’t use svn to check out anything and I notice all the buildbots are failing. As they finish up their current runs they then fail when trying to start a new one and are unable to connect to llvm.org.
  
svn: E175002: Unable to connect to a repository at URL ‘https://llvm.org/svn/llvm-project/llvm/trunk
svn: E175002: OPTIONS of ‘https://llvm.org/svn/llvm-project/llvm/trunk’: SSL handshake failed: SSL socket read failed (https://llvm.org)

From: llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org] On Behalf Of Bill
Seurer via llvm-dev
Sent: Tuesday, January 05, 2016 3:06 PM
To: llvm-dev@lists.llvm.org
Subject: [llvm-dev] llvm.org is down?

I can't use svn to check out anything and I notice all the buildbots are
failing. As they finish up their current runs they then fail when
trying to start a new one and are unable to connect to llvm.org.

Just SVN I think... obviously the mailing lists still work, and I see
Phabricator is okay, but the last SVN commit email I have is from just
before 1pm California time (~2.5 hours ago).
--paulr