Re: Newer GCC?
Re: Newer GCC?
- Subject: Re: Newer GCC?
- From: Ben Weiss <email@hidden>
- Date: Mon, 22 May 2006 04:38:51 -0700
On May 20, 2006, at 10:00 AM, Syd Polk wrote:
On May 20, 2006, at 3:02 AM, Ben Weiss wrote:
Is there any word on when XCode will be usable with a newer
version of the gcc compiler? (Or is there any way to use the
current XCode with a newer gcc?) gcc 4.0 has been surprising me
with some really icky codegen bugs lately...
If you have small reproducible cases, please file bugs. Apple tries
to fix bad codegen bugs in the compiler, even if they don't change
major versions of the compiler.
Also, which release of the tools are you using? The latest version
is Xcode 2.2.1, and each tools release has bug fixes in it.
The more serious codegen bug has been isolated and filed : #4556854.
The code is fairly basic SSE performing a convolution on a block of
integer data, and produces mathematically incorrect output at the -Os
optimization setting, the default for Deployment. There's another
codegen bug at -O0 that produces an immediate crash in the running
program (and is therefore less insidious, actually), that I will
isolate and file shortly.
Ben
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