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llvm-project/llvm/test/Transforms/LoopUnroll
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Whitney Tsang 5225cd43e8 [LoopUnroll] Allow loops with multiple exiting blocks where loop latch 
is not necessary one of them.

Summary: Currently LoopUnrollPass already allow loops with multiple
exiting blocks, but it is only allowed when the loop latch is one of the
exiting blocks.
When the loop latch is not an exiting block, then only single exiting
block is supported.
When possible, the single loop latch or the single exiting block
terminator is optimized to an unconditional branch in the unrolled loop.

This patch allows loops with multiple exiting blocks even if the loop
latch is not one of them. However, the optimization of exiting block
terminator to unconditional branch is not done when there exists more
than one exiting block.
Reviewer: dmgreen, Meinersbur, etiotto, fhahn, efriedma, bmahjour
Reviewed By: efriedma
Subscribers: hiraditya, zzheng, llvm-commits
Tag: LLVM
Differential Revision: https://reviews.llvm.org/D81053
 		2020-06-14 18:44:18 +00:00
..
AArch64 [LoopUnroll] Use LoopSize+1 as threshold, to allow unrolling loops matching LoopSize. 2019-09-17 09:02:48 +00:00
AMDGPU [AMDGPU] Increase max iterations count to analyze complete unroll 2020-06-06 16:32:45 +03:00
ARM Follow up of 67bf9a6154, minor fix in test case, removed duplicate option 2020-01-10 09:41:41 +00:00
Hexagon [lit] Delete empty lines at the end of lit.local.cfg NFC 2019-06-17 09:51:07 +00:00
PowerPC [NFC][PowerPC] Update test 2020-03-18 16:21:37 +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
FullUnroll.ll Fix full unrolling with new pass manager. 2020-05-29 20:08:21 -07:00
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 StoreInst should store Align, not MaybeAlign 2020-05-15 12:26:58 -07:00
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-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
disable_nonforced.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
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
nonlatchcondbr.ll [LoopUnroll] Allow loops with multiple exiting blocks where loop latch 2020-06-14 18:44:18 +00:00
not-rotated.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
opt-levels.ll [llvm] Make new pass manager's OptimizationLevel a class 2020-01-16 09:00:56 -08:00
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
partial-unroll-dead-instructions.ll [LoopUnroll] Avoid UB when converting from WeakVH to `Value *` 2020-01-23 10:36:39 -08:00
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-loop-conditions-pgo-1.ll [LoopUtils] Better accuracy for getLoopEstimatedTripCount. 2020-01-20 16:58:07 +07:00
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] Add possibility to enable peeling on loop nests. 2020-03-02 08:37:11 -08:00
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 [llvm] Fix missing FileCheck directive colons 2020-04-06 09:59:08 -06:00
peel-loop-nests.ll [Loop Peeling] Add possibility to enable peeling on loop nests. 2020-03-02 08:37:11 -08:00
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 [LoopUtils] Better accuracy for getLoopEstimatedTripCount. 2020-01-20 16:58:07 +07:00
peel-loop-pgo-deopt-idom.ll [LoopUtils] Better accuracy for getLoopEstimatedTripCount. 2020-01-20 16:58:07 +07:00
peel-loop-pgo-deopt.ll [LoopUtils] Better accuracy for getLoopEstimatedTripCount. 2020-01-20 16:58:07 +07:00
peel-loop-pgo.ll [LoopUtils] Better accuracy for getLoopEstimatedTripCount. 2020-01-20 16:58:07 +07:00
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
peel-loop2.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 [LoopUnroll] Extend test case with additional loop with larger TC. 2020-05-17 13:55:11 +01:00
pr45939-peel-count-and-complete-unroll.ll [LoopUnroll] Precommit test for PR459393. 2020-05-17 13:29:36 +01:00
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 Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351 2019-12-24 15:57:33 -08:00
runtime-li.ll [LoopUnroll] Add support for loops with exiting headers and uncond latches. 2019-06-26 09:16:57 +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 [InstComine] Forego of one-use check in `(X - (X & Y)) --> (X & ~Y)` if Y is a constant 2020-03-06 21:39:07 +03:00
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-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-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 [InstComine] Forego of one-use check in `(X - (X & Y)) --> (X & ~Y)` if Y is a constant 2020-03-06 21:39:07 +03:00
scevunroll.ll [LoopPred] Enable new transformation by default 2019-11-06 15:41:57 -08:00
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 Infer alignment of unmarked loads in IR/bitcode parsing. 2020-05-14 13:03:50 -07:00
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-preserve-scev-lcssa.ll [LCSSA] Forget values we create LCSSA phis for 2019-10-29 12:05:09 +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
wrong_assert_in_peeling.ll [LoopPeel] Turn incorrect assert into a check 2020-03-12 17:23:07 +07:00