[Bug rtl-optimization/19680] sub-optimial register allocation with sse

[tbptbp at gmail dot com]

------- Additional Comments From tbptbp at gmail dot com  2005-01-31 22:58 -------
In previous test i've used a crufted string of compilation options; i've removed
all that crap for -O3 -march=k8 -mfpmath=sse -fno-gcse -fno-exceptions.

The second patch, hack sse simode inputs, is a small win or at least a draw,
inlined or not, -fno-gcse or not.

The first one, mark builtins constant, is a lose in every conditions; it's the
one that triggers those stack references/movements noted earlier (and my guess
is what's causing the perf regression, other than that the code seems prettier).

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19680