[LLVMdev] 2.7 release notes

[Jakob Stoklund Olesen]

On Apr 21, 2010, at 11:43 PM, Chris Lattner wrote:

> 3. I need a description of: PostRA scheduler for X86? FIXME: is this on by default in 2.7?

The PostRA scheduler for X86 was disabled in r98810, after 2.7 branched.

In the 2.7 branch it is only enabled for -O3 since it is quite expensive in compile time. It sometimes improves the generated code. Sometimes it doesn't.