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clang-p2996/llvm/test/Transforms/LoopUnroll
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Zhaoshi Zheng 1128fa0924 [Unroll] Do NOT unroll a loop with small runtime upperbound 
For a runtime loop if we can compute its trip count upperbound:

Don't unroll if:
1. loop is not guaranteed to run either zero or upperbound iterations; and
2. trip count upperbound is less than UnrollMaxUpperBound
Unless user or TTI asked to do so.

If unrolling, limit unroll factor to loop's trip count upperbound.

Differential Revision: https://reviews.llvm.org/D62989

Change-Id: I6083c46a9d98b2e22cd855e60523fdc5a4929c73
llvm-svn: 373017
2019-09-26 21:40:27 +00:00
..
AArch64
[LoopUnroll] Use LoopSize+1 as threshold, to allow unrolling loops matching LoopSize.
2019-09-17 09:02:48 +00:00
AMDGPU
[lit] Delete empty lines at the end of lit.local.cfg NFC
2019-06-17 09:51:07 +00:00
ARM
[MVE] Don't try to unroll vectorised MVE loops
2019-08-11 08:53:18 +00:00
Hexagon
[lit] Delete empty lines at the end of lit.local.cfg NFC
2019-06-17 09:51:07 +00:00
PowerPC
[lit] Delete empty lines at the end of lit.local.cfg NFC
2019-06-17 09:51:07 +00:00
X86
[lit] Delete empty lines at the end of lit.local.cfg NFC
2019-06-17 09:51:07 +00:00
2004-05-13-DontUnrollTooMuch.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2005-03-06-BadLoopInfoUpdate.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2006-08-24-MultiBlockLoop.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2007-04-16-PhiUpdate.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2007-05-05-UnrollMiscomp.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2007-05-09-UnknownTripCount.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2007-11-05-Crash.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2011-08-08-PhiUpdate.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2011-08-09-IVSimplify.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2011-08-09-PhiUpdate.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2011-10-01-NoopTrunc.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
2012-04-09-unroll-indirectbr.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
basic.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
callbr.ll
[LoopUnroll+LoopUnswitch] do not transform loops containing callbr
2019-07-15 21:16:29 +00:00
complete_unroll_profitability_with_assume.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
convergent.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
debug-info.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
disable_nonforced_count.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
disable_nonforced_enable.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
disable_nonforced_full.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
disable_nonforced.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
disable-full-unroll-by-opt.ll
[Unroll] Add an option to control complete unrolling
2019-09-19 06:57:29 +00:00
disable-loop-unrolling_forced.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
ephemeral.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
epilog_const_phi.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
followup.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-bad-cost.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-crashers.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-heuristics-2.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-heuristics-cmp.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-heuristics-dce.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-heuristics-geps.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-heuristics-phi-prop.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-heuristics.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
full-unroll-keep-first-exit.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
high-cost-trip-count-computation.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
ignore-annotation-intrinsic-cost.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
invalidate_right_loop.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
loop-remarks-with-hotness.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
loop-remarks.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
not-rotated.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
optsize-loop-size.ll
[LoopUnroll] Use LoopSize+1 as threshold, to allow unrolling loops matching LoopSize.
2019-09-17 09:02:48 +00:00
partial-unroll-const-bounds.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
partially-unroll-unconditional-latch.ll
[LoopUnroll] Add support for loops with exiting headers and uncond latches.
2019-06-26 09:16:57 +00:00
peel-loop2.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
peel-loop-conditions-pgo-1.ll
[Loop Peeling] Do not close further unroll/peel if profile based peeling was not used.
2019-08-02 04:29:23 +00:00
peel-loop-conditions-pgo-2.ll
[Loop Peeling] Do not close further unroll/peel if profile based peeling was not used.
2019-08-02 04:29:23 +00:00
peel-loop-conditions.ll
[Loop Peeling] Do not close further unroll/peel if profile based peeling was not used.
2019-08-02 04:29:23 +00:00
peel-loop-inner.ll
[Loop Peeling] Fix silly bug in metadata update.
2019-08-22 10:06:46 +00:00
peel-loop-irreducible.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
peel-loop-negative.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
peel-loop-not-forced.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
peel-loop-pgo-deopt-idom-2.ll
[Loop Peeling] Fix idom detection algorithm.
2019-07-25 19:31:50 +00:00
peel-loop-pgo-deopt-idom.ll
[Loop Peeling] Fix the bug with IDom setting for exit loops
2019-07-15 09:13:11 +00:00
peel-loop-pgo-deopt.ll
[Loop Peeling] Introduce an option for profile based peeling disabling.
2019-08-02 09:32:52 +00:00
peel-loop-pgo.ll
[Loop Peeling] Fix the handling of branch weights of peeled off branches.
2019-07-22 05:15:34 +00:00
peel-loop-scev-invalidate.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
peel-loop.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr10813.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr11361.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr14167.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr18861.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr27157.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr28132.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr31718.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
pr33437.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
rebuild_lcssa.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
revisit.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-epilog-debuginfo.ll
Fix broken debug info in in an !llvm.loop attachment in this testcase.
2019-06-18 20:07:53 +00:00
runtime-li.ll
[LoopUnroll] Add support for loops with exiting headers and uncond latches.
2019-06-26 09:16:57 +00:00
runtime-loop1.ll
[DebugInfo@O2][LoopVectorize] pr39024: Vectorized code linenos step through loop even after completion
2019-06-19 10:50:47 +00:00
runtime-loop2.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-loop3.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-loop4.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-loop5.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-loop-multiexit-dom-verify.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-loop-multiple-exits.ll
InstCombine: Preserve nuw when reassociating nuw ops [1/3]
2019-06-24 21:36:59 +00:00
runtime-loop-non-exiting-latch.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-loop.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-multiexit-heuristic.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
runtime-small-upperbound.ll
[Unroll] Do NOT unroll a loop with small runtime upperbound
2019-09-26 21:40:27 +00:00
runtime-unroll-remainder.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
scevunroll.ll
[RLEV] Rewrite loop exit values for multiple exit loops w/o overall loop exit count
2019-08-14 18:27:57 +00:00
shifted-tripcount.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
tripcount-overflow.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unloop.ll
[LoopUnroll] Add support for loops with exiting headers and uncond latches.
2019-06-26 09:16:57 +00:00
unroll-cleanup.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-cleanuppad.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-count.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-header-exiting-with-phis.ll
[LoopUnroll] Handle certain PHIs in full unrolling properly
2019-08-26 09:29:53 +00:00
unroll-heuristics-pgo.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-loop-invalidation.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-maxcount.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-opt-attribute.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-pragmas-disabled.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-pragmas.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00
unroll-unconditional-latch.ll
[LoopUnroll] Add support for loops with exiting headers and uncond latches.
2019-06-26 09:16:57 +00:00
update-loop-info-in-subloops.ll
Revert "Temporarily Revert "Add basic loop fusion pass.""
2019-04-17 04:52:47 +00:00