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Author SHA1 Message Date
Eric Christopher eb19e9e9fc Turn on list-ilp scheduling by default on x86 and x86-64, fix up 
testcases accordingly. Some are currently xfailed and will be filed
as bugs to be fixed or understood.

Performance results:

roughly neutral on SPEC
some micro benchmarks in the llvm suite are up between 100 and 150%, only
a pair of regressions that are due to be investigated

john-the-ripper saw:
10% improvement in traditional DES
8% improvement in BSDI DES
59% improvement in FreeBSD MD5
67% improvement in OpenBSD Blowfish
14% improvement in LM DES

Small compile time impact.

llvm-svn: 127208
 2011-03-08 02:42:25 +00:00
Chris Lattner 4c8b1824f0 emit integer and fp zeros as (e.g.) .byte 0 instead of .space 1, 
for tidiness.

llvm-svn: 93992
 2010-01-20 07:19:19 +00:00
Dan Gohman 69499b13fd Add support for rematerializing FsFLD0SS and FsFLD0SD as constant-pool 
loads in order to reduce register pressure.

llvm-svn: 82470
 2009-09-21 18:30:38 +00:00