Veera 2d5f07c828 [InstCombine] Fold X udiv Y to X lshr cttz(Y) if Y is a power of 2 (#121386) ...

Fixes #115767

This PR folds `X udiv Y` to `X lshr cttz(Y)` if Y is a power of two
since bitwise operations are faster than division.

Proof: https://alive2.llvm.org/ce/z/qHmLta

2025-01-11 13:56:13 +08:00

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AArch64

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

AMDGPU

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ARM

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NVPTX

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X86

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

2002-09-09-PointerIndVar.ll

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2003-04-16-ExprAnalysis.ll

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2003-09-23-NotAtTop.ll

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2003-12-10-RemoveInstrCrash.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

2003-12-15-Crash.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

2004-03-10-PHIInsertionBug.ll

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2004-04-05-InvokeCastCrash.ll

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2004-04-07-ScalarEvolutionCrash.ll

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2005-02-11-InvokeCrash.ll

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2005-02-17-TruncateExprCrash.ll

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2005-02-26-ExitValueCompute.ll

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2005-06-15-InstMoveCrash.ll

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2005-11-18-Crash.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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2006-03-31-NegativeStride.ll

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2006-06-16-Indvar-LCSSA-Crash.ll

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2006-09-20-LFTR-Crash.ll

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2006-12-10-BitCast.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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2007-01-06-TripCount.ll

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2007-06-06-DeleteDanglesPtr.ll

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2007-11-23-BitcastCrash.ll

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2008-06-15-SCEVExpanderBug.ll

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2008-09-02-IVType.ll

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2008-10-03-CouldNotCompute.ll

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2008-11-25-APFloatAssert.ll

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2009-04-22-IndvarCrash.ll

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2009-04-27-Floating.ll

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2009-05-24-useafterfree.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

2011-09-10-widen-nsw.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

2011-09-19-vectoriv.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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2011-09-27-hoistsext.ll

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2011-10-27-lftrnull.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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2011-11-01-lftrptr.ll

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2011-11-17-selfphi.ll

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2012-10-19-congruent-constant.ll

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2014-06-21-congruent-constant.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

2020-12-15-trunc-bug-expensive-range-inference.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

2024-11-15 14:19:50 +00:00

ada-loops.ll

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addrec_no_exec_on_every_iteration.ll

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ashr-expansion.ll

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ashr-tripcount.ll

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avoid-i0.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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backedge-on-min-max.ll

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bbi-63564.ll

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bec-cmp.ll

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canonicalize-cmp.ll

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casted-argument.ll

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casted-trunc.ll

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checks_against_min_value.ll

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const_phi.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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constant_result.ll

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constant-fold.ll

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crash.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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cycled_phis.ll

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D108043.ll

[SCEVExpander] Preserve gep nuw during expansion (#102133)

2024-10-02 11:45:00 +02:00

dangling-use.ll

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deterministic-sign.ll

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divide-pointer.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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dont-recompute.ll

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drop-exact.ll

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elim-extend.ll

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2024-04-16 10:42:32 +09:00

eliminate-backedge.ll

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eliminate-comparison.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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eliminate-exit-no-dl.ll

[ConstantFolding] Infer getelementptr nuw flag (#119214)

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eliminate-exit.ll

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eliminate-max.ll

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eliminate-rem.ll

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eliminate-sat.ll

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exit_value_test2.ll

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exit_value_test3.ll

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exit_value_tests.ll

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exit-count-select.ll

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finite-exit-comparisons.ll

[IndVarSimplify] Drop samesign flags after narrowing compares (#116263)

2024-11-15 09:15:37 +08:00

floating-point-iv.ll

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floating-point-small-iv.ll

[ConstantFolding] Infer getelementptr nuw flag (#119214)

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full_widening.ll

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hoist-wide-inc-for-narrow-use-recompute-flags.ll

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indirectbr.ll

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infer-poison-flags.ll

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interesting-invoke-use.ll

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invalidate-modified-lcssa-phi.ll

[SCEV] Disallow simplifying phi(undef, X) to X (#115109)

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iterationCount_zext_or_trunc.ll

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iv-fold.ll

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iv-poison.ll

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iv-sext.ll

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iv-widen-elim-ext.ll

[IndVars] Mark truncs as nuw/nsw (#88686)

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iv-zext.ll

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lcssa-preservation.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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lftr_disabled.ll

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lftr-address-space-pointers.ll

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lftr-dead-ivs.ll

[SCEVExpander] Preserve gep nuw during expansion (#102133)

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lftr-multi-exit.ll

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lftr-pr20680.ll

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lftr-pr31181.ll

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lftr-promote.ll

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lftr-reuse.ll

[IndVars] Preserve flags of narrow IV inc if replacing with wider inc. (#80446)

2024-02-10 18:11:17 +00:00

lftr.ll

[SCEVExpander] Preserve gep nuw during expansion (#102133)

2024-10-02 11:45:00 +02:00

loop_evaluate7.ll

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loop_evaluate8.ll

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loop_evaluate9.ll

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loop_evaluate11.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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loop_evaluate_1.ll

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loop_evaluate_3.ll

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loop_evaluate_4.ll

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loop_evaluate_5.ll

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loop_evaluate_6.ll

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loop-predication.ll

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lrev-existing-umin.ll

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masked-iv.ll

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monotonic_checks.ll

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negative_ranges.ll

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no-iv-rewrite.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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opaque-ptr.ll

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outer_phi.ll

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phi-select.ll

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phi-uses-value-multiple-times.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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post-inc-range.ll

[IndVars] Mark truncs as nuw/nsw (#88686)

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pr18223.ll

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pr22222.ll

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pr24783.ll

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pr25578.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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pr26974.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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pr28705.ll

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pr30806-phi-scev.ll

[IndVars] Preserve flags of narrow IV inc if replacing with wider inc. (#80446)

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pr32045.ll

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pr38674.ll

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pr40454.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116161)

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pr45835.ll

[IR] Remove support for icmp and fcmp constant expressions (#93038)

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pr50506.ll

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pr55689.ll

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pr55925.ll

[IndVars] Mark truncs as nuw/nsw (#88686)

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pr58702-invalidate-scev-when-replacing-congruent-phis.ll

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pr79861.ll

[IndVarSimplify] Fix poison-safety when reusing instructions (#80458)

2024-02-05 10:11:39 +01:00

pr102597.ll

[SCEV] Fix incorrect extension in computeConstantDifference()

2024-08-12 15:24:37 +02:00

pr106239.ll

[IndVars] Check if WideInc available before trying to use it

2024-08-28 12:56:01 +02:00

pr116483.ll

[SCEV] Fix sext handling for getConstantMultiple (#117093)

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pr117133.ll

[SCEV] Do not allow refinement in the rewriting of BEValue (#117152)

2024-12-01 20:11:09 +08:00

predicated_ranges.ll

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preserve-memoryssa.ll

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preserve-nsw-during-expansion.ll

[IndVars] Preserve flags of narrow IV inc if replacing with wider inc. (#80446)

2024-02-10 18:11:17 +00:00

preserve-signed-wrap.ll

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preserving-debugloc-rem-div.ll

[DebugInfo][SimplifyIndVar] Fix missing debug locations for div/rem instructions (#97284)

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preserving-debugloc-sat-overflow.ll

[DebugInfo][SimplifyIndVar] Missing debug location updates for overflow/saturation instructions (#97987)

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preserving-debugloc.ll

[DebugInfo][IndVarSimplify] Fix missing debug location updates (#91443)

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promote-iv-to-eliminate-casts.ll

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replace-sdiv-by-udiv.ll

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rewrite-loop-exit-value.ll

[InstCombine] Fold X udiv Y to X lshr cttz(Y) if Y is a power of 2 (#121386)

2025-01-11 13:56:13 +08:00

rewrite-loop-exit-values-phi.ll

[SCEVExpander] Fix addrec cost model (#106704)

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rlev-add-me.ll

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shared-exit-between-nested-loop.ll

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shift-range-checks.ll

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shrunk-constant.ll

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single-element-range.ll

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sink-alloca.ll

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tripcount_compute.ll

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udiv.ll

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use-range-metadata.ll

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variable-stride-ivs-0.ll

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widen-i32-i8ptr.ll

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widen-nonnegative-countdown.ll

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widen-nonnegative.ll

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zext-nuw.ll

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