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llvm-project/llvm/test/Transforms/LoopStrengthReduce
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Florian Hahn f78150d2d4
Reapply "[SCEV] Fold (C1 * A /u C2) -> A /u (C2 /u C1), if C2 > C1." (#158328) 
This reverts commit fd58f235f8c5bd40d98acfd8e7fb11d41de301c7.

The recommit contains an extra check to make sure that D is a multiple of
C2, if C2 > C1. This fixes the issue causing the revert fd58f235f8c. Tests
have been added in 6a726e9a4d3d0.

Original message:
If C2 >u C1 and C1 >u 1, fold to A /u (C2 /u C1).

Depends on https://github.com/llvm/llvm-project/pull/157555.

Alive2 Proof: https://alive2.llvm.org/ce/z/BWvQYN

PR: https://github.com/llvm/llvm-project/pull/157656
2025-09-17 14:28:30 +01:00
..
AArch64
[LSR] Add an addressing mode that considers all addressing modes (#158110)
2025-09-16 11:46:54 +01:00
AMDGPU
[AMDGPU] Remove explicit datalayout from tests where not needed
2025-04-30 10:58:17 -07:00
ARM
[MachineScheduler] Fix physreg dependencies of ExitSU (#123541)
2025-02-01 20:40:50 +03:00
Mips
MIPS: Set EnableLoopTermFold (#133454)
2025-03-29 21:51:59 +08:00
NVPTX
[NVPTX] Switch front-ends and tests to ptx_kernel cc (#120806)
2025-01-07 18:24:50 -08:00
Power
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
RISCV
[PHIElimination] Revert #131837 #146320 #146337 (#146850)
2025-07-03 07:48:08 -04:00
X86
[SCEV] Fold (C * A /u C) -> A, if A is a multiple of C and C a pow-of-2. (#156730)
2025-09-05 08:45:13 +00:00
2005-08-15-AddRecIV.ll
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2005-08-17-OutOfLoopVariant.ll
…
2005-09-12-UsesOutOutsideOfLoop.ll
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2007-04-23-UseIterator.ll
…
2008-08-13-CmpStride.ll
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2008-09-09-Overflow.ll
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2009-01-13-nonconstant-stride-outside-loop.ll
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2009-04-28-no-reduce-mul.ll
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2011-07-19-CritEdgeBreakCrash.ll
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2011-10-03-CritEdgeMerge.ll
Reland "[LSR] Do not create duplicated PHI nodes while preserving LCSSA form" (#107380)
2024-09-09 16:14:51 +03:00
2011-10-06-ReusePhi.ll
[IR] Convert from nocapture to captures(none) (#123181)
2025-01-29 16:56:47 +01:00
2011-10-13-SCEVChain.ll
…
2011-10-14-IntPtr.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
2011-12-19-PostincQuadratic.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
2012-01-02-nopreheader.ll
…
2012-01-16-nopreheader.ll
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2012-03-15-nopreheader.ll
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2012-03-26-constexpr.ll
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2012-07-13-ExpandUDiv.ll
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2012-07-18-LimitReassociate.ll
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2013-01-05-IndBr.ll
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2013-01-14-ReuseCast.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
addrec-gep-address-space.ll
[IR] Convert from nocapture to captures(none) (#123181)
2025-01-29 16:56:47 +01:00
addrec-gep.ll
[IR] Convert from nocapture to captures(none) (#123181)
2025-01-29 16:56:47 +01:00
callbr-critical-edge-splitting2.ll
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callbr-critical-edge-splitting.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
canonical-form.ll
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count-to-zero.ll
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dbg-preserve-0.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
dbg-preserve-1.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
dbg-preserve-2.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
dead-phi.ll
…
debuginfo-scev-salvage-0.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
debuginfo-scev-salvage-1.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
debuginfo-scev-salvage-2.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
debuginfo-scev-salvage-3.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
debuginfo-scev-salvage-4.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
debuginfo-scev-salvage-5.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
debuginfo-scev-salvage-large-width.ll
[DebugInfo][LSR] Fix assertion failure salvaging IV with offset > 64 bits wide (#110979)
2024-10-03 11:47:08 +01:00
depth-limit-overrun.ll
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different-type-ivs.ll
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dominate-assert.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
dont_insert_redundant_ops.ll
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dont_reduce_bytes.ll
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dont_reverse.ll
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dont-hoist-simple-loop-constants.ll
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duplicated-phis.ll
Reapply "[SCEV] Fold (C1 * A /u C2) -> A /u (C2 /u C1), if C2 > C1." (#158328)
2025-09-17 14:28:30 +01:00
ephemeral.ll
…
exit_compare_live_range.ll
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funclet.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
gnarly-setupcost.ll
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hoist-parent-preheader.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
invariant_value_first_arg.ll
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invariant_value_first.ll
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ivchain.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
ivincs-hoist.ll
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lsr-comp-time.ll
[IR] Remove size argument from lifetime intrinsics (#150248)
2025-08-08 11:09:34 +02:00
lsr-overflow.ll
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lsr-rewrite-to-add-one.ll
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lsr-term-fold-negative-testcase.ll
[LSR] Split the -lsr-term-fold transformation into it's own pass (#104234)
2024-08-17 18:34:23 -07:00
lsr-term-fold.ll
[SCEVExpander] Don't try to reuse SCEVUnknown values (#115141)
2024-11-11 12:36:29 +01:00
lsr-unreachable-bb-phi-node.ll
[LSR] Split the -lsr-term-fold transformation into it's own pass (#104234)
2024-08-17 18:34:23 -07:00
multi-edge-latch.ll
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negative-scale.ll
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nested-reduce.ll
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nonintegral.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
nonlinear-postinc.ll
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opaque-ptr.ll
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ops_after_indvar.ll
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optimizemax_debugloc.ll
[DebugInfo][LoopStrengthReduce] Salvage the debug value of the dead cmp instruction (#147241)
2025-07-14 09:45:37 +08:00
phi_ehpad_ignore_sameval.ll
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phi_node_update_multiple_preds.ll
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post-inc-icmpzero.ll
[SCEVExpander] Preserve gep nuw during expansion (#102133)
2024-10-02 11:45:00 +02:00
post-inc-optsize.ll
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post-increment-insertion.ll
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pr2537.ll
[IR] Remove support for shl constant expressions (#96037)
2024-06-20 08:59:29 +02:00
pr2570.ll
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pr3086.ll
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pr3399.ll
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pr3571.ll
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pr12018.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
pr12048.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
pr12691.ll
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pr18165.ll
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pr25541.ll
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pr27056.ll
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pr31627.ll
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pr48725.ll
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pr50765.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
pr50918.ll
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pr51329.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
pr51656.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
pr52161.ll
[RemoveDIs] Remove "try-debuginfo-iterators..." test flags (#130298)
2025-03-14 15:50:49 +00:00
pr56160.ll
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pr70348.ll
[SCEV] Fix "quick and dirty" difference that could lead to assert (#70688)
2023-10-31 00:50:57 +03:00
pr84709.ll
[LSR] Clear SCEVExpander before deleting phi nodes
2024-03-12 16:24:10 +01:00
preserve-gep-loop-variant.ll
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preserve-lcssa.ll
Revert "[LSR] Do not create duplicated PHI nodes while preserving LCSSA form" (#107666)
2024-09-06 19:54:26 -07:00
related_indvars.ll
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remove_indvar.ll
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remove_scev_indvars.ll
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rewrite-to-add-neg-1-expansion-flags.ll
[LSR] Add test showing incorrectly adding nuw with #77827.
2024-01-15 21:31:28 +00:00
scaling_factor_cost_crash.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
scaling-factor-incompat-type.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
scev-after-loopinstsimplify.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
scev-expander-lcssa.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
scev-incorrect-nuw-inference.ll
[SCEV] Fix incorrect NUW inference (#70521)
2023-10-31 11:43:57 -07:00
scev-insertpt-bug.ll
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sext-ind-var.ll
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share_code_in_preheader.ll
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share_ivs.ll
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shl.ll
[IR] Convert from nocapture to captures(none) (#123181)
2025-01-29 16:56:47 +01:00
two-combinations-bug.ll
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uglygep-address-space.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
uglygep.ll
[llvm] Remove br i1 undef from some regression tests [NFC] (#117112)
2024-11-21 08:06:56 +00:00
use_postinc_value_outside_loop.ll
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var_stride_used_by_compare.ll
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variable_stride.ll
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wrong-hoisting-iv.ll
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