mirror of
https://github.com/c64scene-ar/llvm-6502.git
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bc7c58d2b1
This should hopefully have fixed the stage2/stage3 miscompare on the dragonegg
testers.
"LoopVectorize: Use the dependence test utility class
We now no longer need alias analysis - the cases that alias analysis would
handle are now handled as accesses with a large dependence distance.
We can now vectorize loops with simple constant dependence distances.
for (i = 8; i < 256; ++i) {
a[i] = a[i+4] * a[i+8];
}
for (i = 8; i < 256; ++i) {
a[i] = a[i-4] * a[i-8];
}
We would be able to vectorize about 200 more loops (in many cases the cost model
instructs us no to) in the test suite now. Results on x86-64 are a wash.
I have seen one degradation in ammp. Interestingly, the function in which we
now vectorize a loop is never executed so we probably see some instruction
cache effects. There is a 2% improvement in h264ref. There is one or the other
TSCV loop kernel that speeds up.
radar://13681598"
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184724 91177308-0d34-0410-b5e6-96231b3b80d8
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| .. | ||
| ARM | ||
| X86 | ||
| 12-12-11-if-conv.ll | ||
| 2012-10-20-infloop.ll | ||
| 2012-10-22-isconsec.ll | ||
| bsd_regex.ll | ||
| bzip_reverse_loops.ll | ||
| calloc.ll | ||
| cast-induction.ll | ||
| cpp-new-array.ll | ||
| dbg.value.ll | ||
| flags.ll | ||
| float-reduction.ll | ||
| gcc-examples.ll | ||
| global_alias.ll | ||
| hoist-loads.ll | ||
| i8-induction.ll | ||
| if-conv-crash.ll | ||
| if-conversion-nest.ll | ||
| if-conversion-reduction.ll | ||
| if-conversion.ll | ||
| increment.ll | ||
| induction_plus.ll | ||
| induction.ll | ||
| infiniteloop.ll | ||
| intrinsic.ll | ||
| lcssa-crash.ll | ||
| lit.local.cfg | ||
| memdep.ll | ||
| metadata-unroll.ll | ||
| metadata-width.ll | ||
| minmax_reduction.ll | ||
| multiple-address-spaces.ll | ||
| no_idiv_reduction.ll | ||
| no_int_induction.ll | ||
| no_outside_user.ll | ||
| nofloat.ll | ||
| non-const-n.ll | ||
| nsw-crash.ll | ||
| phi-hang.ll | ||
| ptr_loops.ll | ||
| read-only.ll | ||
| reduction.ll | ||
| reverse_induction.ll | ||
| reverse_iter.ll | ||
| runtime-check-readonly.ll | ||
| runtime-check.ll | ||
| runtime-limit.ll | ||
| same-base-access.ll | ||
| scalar-select.ll | ||
| simple-unroll.ll | ||
| small-loop.ll | ||
| start-non-zero.ll | ||
| struct_access.ll | ||
| value-ptr-bug.ll | ||
| vectorize-once.ll | ||
| write-only.ll | ||