Hal Finkel ade2d32df0 [PowerPC] Adjust load/store costs in PPCTTI ...

This provides more realistic costs for the insert/extractelement instructions
(which are load/store pairs), accounts for the cheap unaligned Altivec load
sequence, and for unaligned VSX load/stores.

Bad news:
MultiSource/Applications/sgefa/sgefa - 35% slowdown (this will require more investigation)
SingleSource/Benchmarks/McGill/queens - 20% slowdown (we no longer vectorize this, but it was a constant store that was scalarized)
MultiSource/Benchmarks/FreeBench/pcompress2/pcompress2 - 2% slowdown

Good news:
SingleSource/Benchmarks/Shootout/ary3 - 54% speedup
SingleSource/Benchmarks/Shootout-C++/ary - 40% speedup
MultiSource/Benchmarks/Ptrdist/ks/ks - 35% speedup
MultiSource/Benchmarks/FreeBench/neural/neural - 30% speedup
MultiSource/Benchmarks/TSVC/Symbolics-flt/Symbolics-flt - 20% speedup

Unfortunately, estimating the costs of the stack-based scalarization sequences
is hard, and adjusting these costs is like a game of whac-a-mole :( I'll
revisit this again after we have better codegen for vector extloads and
truncstores and unaligned load/stores.

llvm-svn: 205658

2014-04-04 23:51:18 +00:00

..

ARM

When analyzing vectors of element type that require legalization,

2014-03-10 22:59:13 +00:00

ARM64

ARM64: initial backend import

2014-03-29 10:18:08 +00:00

PowerPC

[PowerPC] Adjust load/store costs in PPCTTI

2014-04-04 23:51:18 +00:00

X86

When analyzing vectors of element type that require legalization,

2014-03-10 22:59:13 +00:00

no_info.ll

Make opt grab the triple from the module and use it to initialize the target machine.

2013-01-01 08:00:32 +00:00