2.10.91: A problem with R_MIPS_CALL relocations within gas

[Andrew Haley]

Ralf Baechle writes:
 > On Fri, Nov 17, 2000 at 09:16:52AM -0800, Ian Lance Taylor wrote:
 > 
 > > FYI, gcc does this to permit better instruction scheduling.  Splitting
 > > up the instructions permits, e.g., putting the la instruction in a
 > > delay slot.  Other MIPS toolchains do extensive instruction scheduling
 > > in the assembler, but in the GNU toolchain gcc can do a better job of
 > > that.
 > 
 > I've taken a look at the dissassmbly of libc and found that gcc only does
 > a reasonable job of scheduling function calls in very few cases.

It depends on which version of gcc was used; there have been several
versions of the scheduler, and it's an area of the compiler being
worked on all the time.

Andrew.