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This branch defines a gallivm_state structure which contains the
LLVMBuilderRef, LLVMContextRef, etc. All data structures built with
this object can be periodically freed during a "garbage collection"
operation.
The gallivm_state object has to be passed to most of the builder
functions where LLVMBuilderRef used to be used.
Conflicts:
src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
src/gallium/drivers/llvmpipe/lp_state_setup.c
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this is more a proof to show vector shifts on x86 with per-element shift count
are evil. Since we can avoid the shift with a single compare/select, use that
instead. Replaces more than 20 instructions (and slow ones at that) with about 3,
and cuts compiled shader size with mesa's yuvsqure demo by over 10%
(no performance measurements done - but selection is blazing fast).
Might want to revisit that for future cpus - unfortunately AVX won't have vector
shifts neither, but AMD's XOP will, but even in that case using selection here
is probably not slower.
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This allows to do the unpacking of formats that fit in 4 x unorm8 in
parallel, 4 pixels at a time.
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They need to grow, and they provide basic functionality which is not
specific to sampling.
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