llvm-project

History

[InstructionSimplify] Extend simplifyICmpWithZero to handle equivalent zero RHS (#179055 )

Add a new helper function `matchEquivZeroRHS()` that recognizes
comparisons with constants that are equivalent to comparisons with zero,
and transforms the predicate accordingly.

This handles the following transformations:
- icmp sgt X, -1 --> icmp sge X, 0
- icmp sle X, -1 --> icmp slt X, 0
- icmp [us]ge X, 1 --> icmp [us]gt X, 0
- icmp [us]lt X, 1 --> icmp [us]le X, 0

This enables more optimization opportunities in `simplifyICmpWithZero`,
such as folding icmp sgt X, -1 when X is known to be non-negative.

---

- IR Impact: https://github.com/dtcxzyw/llvm-opt-benchmark/pull/3414

2026-02-13 00:06:32 +08:00

AArch64

[LLVM][InstSimplify] Add folds for SVE integer reduction intrinsics. (#167519 )

2025-11-18 14:33:43 +00:00

ConstProp

[ConstantFolding] Allow truncation when folding wasm.dot

2026-01-09 17:15:31 +01:00

X86

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2010-12-20-Boolean.ll

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2011-01-14-Thread.ll

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2011-02-01-Vector.ll

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2011-09-05-InsertExtractValue.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

2011-10-27-BinOpCrash.ll

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2011-11-23-MaskedBitsCrash.ll

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2013-04-19-ConstantFoldingCrash.ll

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abs_intrinsic.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

add_vp.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

add-mask.ll

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add.ll

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addsub.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

and-icmps-same-ops.ll

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and-or-icmp-ctpop.ll

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and-or-icmp-min-max.ll

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and-or-icmp-nullptr.ll

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and-or-icmp-zero.ll

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and-or-implied-cond.ll

[InstSimplify] Fix simplifyAndOrWithICmpEq with undef refinement (#98898 )

2024-07-16 11:40:04 +02:00

and.ll

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AndOrXor.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

assume_icmp.ll

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assume-fcmp-constant-implies-class.ll

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assume-non-zero.ll

[ValueTracking] Precommit test for #118406

2025-02-04 22:53:33 +01:00

bitcast-vector-fold.ll

[LLVM][IR] Add support for vector ConstantInt/FP to ConstandFolding:FoldBitCast. (#117163 )

2024-12-10 15:42:05 +00:00

bitreverse-fold.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

bitreverse.ll

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bswap.ll

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call.ll

[InstCombine] Propagate poison through fshl and fshr intrinsics (#172859 )

2025-12-20 23:53:01 +08:00

canonicalize.ll

IR: Promote "denormal-fp-math" to a first class attribute (#174293 )

2026-02-05 13:31:26 +00:00

cast-unsigned-icmp-cmp-0.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

cast.ll

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cmp_ext.ll

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cmp_of_min_max.ll

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cmp-alloca-offsets.ll

[InstSimplify] Correctly handle comparison with zero-size allocs (#115728 )

2024-11-14 11:55:19 +01:00

cmp-vec-fast-path.ll

[LLVM][IR] Use splat syntax when printing ConstantExpr based splats. (#116856 )

2024-11-21 11:21:12 +00:00

compare.ll

[InstSimplify] Extend icmp-of-add simplification to sle/sgt/sge (#168900 )

2025-11-20 21:35:14 +00:00

const-fold-nvvm-add.ll

[NVPTX] Constant fold NVVM add/mul/div/fma (#152544 )

2025-08-22 17:33:00 +01:00

const-fold-nvvm-div.ll

[NVPTX] Constant fold NVVM add/mul/div/fma (#152544 )

2025-08-22 17:33:00 +01:00

const-fold-nvvm-f2i-d2i.ll

[NVPTX] Fix NaN + overflow semantics of f2ll/d2i (#159530 )

2025-09-25 16:19:11 +01:00

const-fold-nvvm-f2ll-d2ll.ll

[NVPTX] Fix NaN + overflow semantics of f2ll/d2i (#159530 )

2025-09-25 16:19:11 +01:00

const-fold-nvvm-fma.ll

[NVPTX] Constant fold NVVM add/mul/div/fma (#152544 )

2025-08-22 17:33:00 +01:00

const-fold-nvvm-fmin-fmax.ll

[NVPTX] Constant fold NVVM fmin and fmax (#121966 )

2025-01-16 14:38:51 +00:00

const-fold-nvvm-mul.ll

[NVPTX] Constant fold NVVM add/mul/div/fma (#152544 )

2025-08-22 17:33:00 +01:00

const-fold-nvvm-unary-arithmetic.ll

[ConstantFolding] Fix incorrect nvvm_round folding (#151563 )

2025-08-01 10:31:43 +01:00

constant-fold-fp-denormal.ll

IR: Promote "denormal-fp-math" to a first class attribute (#174293 )

2026-02-05 13:31:26 +00:00

constant-fold-inttoptr-add.ll

[Value] Look through inttoptr (add ..) in accumulateConstantOffsets (#124981 )

2025-01-30 20:58:38 +00:00

constantfold-add-nuw-allones-to-allones.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

constantfold-shl-nuw-C-to-C.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

constfold-constrained.ll

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ctpop-pow2.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

dead-code-removal.ll

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

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

disable_folding.ll

[ConstantFolding] Add flag to disable call folding (#140270 )

2025-05-30 11:27:18 +01:00

distribute.ll

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div-by-0-guard-before-smul_ov-not.ll

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div-by-0-guard-before-smul_ov.ll

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div-by-0-guard-before-umul_ov-not.ll

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div-by-0-guard-before-umul_ov.ll

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div.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

domcondition.ll

[InstSimplify] Simplify fcmp implied by dominating fcmp (#161090 )

2025-10-05 16:15:51 +08:00

exact-nsw-nuw.ll

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exp10.ll

[InstSimplify] Add poison propagation for trivially vectorizable intrinsics (#149243 )

2025-07-19 19:37:21 -07:00

extract-element.ll

[LLVM][IR] Teach extractelement folds about constant ConstantInt/FP. (#116793 )

2024-11-21 12:39:53 +00:00

extract-vector.ll

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fast-math-strictfp.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

fast-math.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

fcmp-select.ll

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fcmp.ll

[InstSimplify] Fall back to the rest of the logic if folding of the consts isn't successfull when simplifying fcmp (#176159 )

2026-01-16 11:59:12 +00:00

fdiv-strictfp.ll

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fdiv.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

floating-point-arithmetic-strictfp.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

floating-point-arithmetic.ll

[IR] Handle fabs LHS in fcmpImpliesClass (#152913 )

2025-08-10 22:55:04 +08:00

floating-point-compare.ll

IR: Promote "denormal-fp-math" to a first class attribute (#174293 )

2026-02-05 13:31:26 +00:00

fminmax-folds.ll

Avoid maxnum(sNaN, x) optimizations / folds (#170181 )

2025-12-02 12:43:03 +00:00

fold-bfloat-half-bitcasts.ll

[ConstantFold] constant fold bfloat <-> half bitcasts (#177663 )

2026-01-26 14:53:09 +01:00

fold-intrinsics.ll

[InstSimplify] Simplify extractvalue (umul_with_overflow(x, 1)). (#157307 )

2025-09-07 18:32:40 +01:00

fold-vscale.ll

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fp-nan.ll

[LLVM][IR] Use splat syntax when printing ConstantExpr based splats. (#116856 )

2024-11-21 11:21:12 +00:00

fp-undef-poison-strictfp.ll

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fp-undef-poison.ll

[ConstantFolding] Fold sqrt poison -> poison (#141821 )

2025-06-11 13:27:14 +02:00

fptoi-range.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

fptoi-sat.ll

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freeze-noundef.ll

[ValueTracking] Teach isGuaranteedNotToBeUndefOrPoison about splats (#163570 )

2025-10-20 11:20:09 +01:00

freeze.ll

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gc_relocate.ll

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gep.ll

Revert "[InstSimplify] Fold getelementptr inbounds null, idx -> null (#130742 )" (#138168 )

2025-05-01 14:21:59 -07:00

get_active_lane_mask.ll

[InstSimplify] Consider vscale_range for get active lane mask (#160073 )

2025-09-24 11:35:15 +01:00

gv-alloca-cmp.ll

[IR] Don't allow values of opaque type (#137625 )

2025-04-30 15:01:00 +02:00

icmp-abs-nabs.ll

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icmp-bool-constant.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

icmp-constant.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

icmp-equiv-zero.ll

[InstructionSimplify] Extend simplifyICmpWithZero to handle equivalent zero RHS (#179055 )

2026-02-13 00:06:32 +08:00

icmp-monotonic.ll

[InstSimplify] Fold X * C >= X to true (#129352 )

2025-03-01 12:02:57 -05:00

icmp-not-bool-constant.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

icmp-ranges.ll

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icmp.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

implies.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

insert-vector.ll

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insertelement.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

insertvalue.ll

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invalid-load-operand-infinite-loop.ll

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invariant.group-load.ll

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is_fpclass.ll

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known-never-infinity.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

known-never-nan.ll

[InstSimplify] fold uno/ord comparison if fpclass is always NaN (#97763 )

2024-07-09 14:44:48 -07:00

known-non-zero-opaque-ptrs.ll

[ValueTracking] Handle nonnull attributes at callsite (#124908 )

2025-01-29 23:14:36 +08:00

known-non-zero.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

ldexp.ll

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load-relative-32.ll

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load-relative.ll

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load.ll

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log2-pow2-intrinsic.ll

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log10-pow10-intrinsic.ll

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log-exp-intrinsic.ll

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logic-of-fcmps.ll

[InstSimplify] Generalize simplifyAndOrOfFCmps to handle fabs (#116590 )

2024-11-19 20:10:40 +08:00

maxmin_intrinsics.ll

[InstSimplify] Fold {u,s}{min,max} x, poison -> poison (#138166 )

2025-05-02 07:49:27 +08:00

maxmin.ll

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mul.ll

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named-vector-shuffle-reverse.ll

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negate.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

noalias-ptr.ll

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null-ptr-is-valid-attribute.ll

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null-ptr-is-valid.ll

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opaque-ptr.ll

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or-icmps-same-ops.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

or.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

past-the-end.ll

[ConstantFolding] Infer getelementptr nuw flag (#119214 )

2024-12-09 16:44:05 +01:00

phi-cse.ll

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phi.ll

[InstSimplify] Fix incorrect poison propagation when folding phi (#96631 )

2024-11-07 14:09:45 +01:00

po2-shift-add-and-to-zero.ll

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pr28725.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

pr33957.ll

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pr49495.ll

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pr87042.ll

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pr122582.ll

[ConstantFolding] Add ilogb in isMathLibCallNoop (#122582 )

2025-01-20 12:19:07 -05:00

ptr_diff.ll

[InstSimplify] Support non-inbounds GEP in ptrdiff fold (#162676 )

2025-10-10 08:03:25 +00:00

ptrmask.ll

[InstSimplify] Support ptrtoaddr in ptrmask fold

2025-10-14 13:55:04 +02:00

ptrtoaddr.ll

[ValueTracking] Support ptrtoaddr in inequality implication (#173362 )

2026-01-05 09:39:16 +01:00

ptrtoint.ll

[IR] Require DataLayout for pointer cast elimination (#162279 )

2025-10-07 17:19:48 +02:00

reassociate.ll

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redundant-null-check-in-uadd_with_overflow-of-nonnull-ptr.ll

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rem.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

require-dominator.ll

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

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

result-of-add-of-negative-is-non-zero-and-no-underflow.ll

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result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll

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result-of-usub-is-non-zero-and-no-overflow.ll

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returned.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

round-intrinsics.ll

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saturating-add-sub.ll

[InstCombine] Propagate poison pow[i], [us]add, [us]sub and [us]mul (#146750 )

2025-07-04 22:55:07 +01:00

sdiv.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

select_or_and.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

select-abs.ll

ValueTracking: handle more ops in isNotCrossLaneOperation (#112183 )

2024-10-14 14:08:12 +01:00

select-equivalence-fp.ll

[InstSimplify] Treat float binop with identity as refining (#120098 )

2024-12-17 10:58:52 +01:00

select-icmp.ll

[IR] Fix canReplacePointersIfEqual to properly validate vector pointers (#174142 )

2026-01-08 09:30:11 +09:00

select-implied.ll

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select-inseltpoison.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

select-logical.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

select-maxmin.ll

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select.ll

[InstSimplify] Handle trunc to i1 in Select with bit test folds. (#122944 )

2025-02-01 08:48:32 +01:00

shift-128-kb.ll

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shift-knownbits.ll

[Reland][ValueTracking] Improve Bitcast handling to match SDAG (#145223 )

2025-08-04 14:51:03 +05:30

shift.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

shr-nop.ll

[ValueTracking] Handle assume(trunc x to i1) in ComputeKnownBits (#118406 )

2025-04-10 19:29:28 +02:00

shr-scalar-vector-consistency.ll

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shufflevector-inseltpoison.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

shufflevector.ll

[ConstantFolding] Fold scalable shufflevector of poison/undef. (#143475 )

2025-06-10 12:50:16 -07:00

signed-div-rem.ll

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simplify-nested-bitcast.ll

[ConstantFolding] Infer getelementptr nuw flag (#119214 )

2024-12-09 16:44:05 +01:00

sincos.ll

[InstSimplify] Fold trig functions call of poison to poison (#148969 )

2025-07-16 08:35:13 -07:00

smul_fix.ll

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srem.ll

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strictfp-fadd.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

strictfp-fsub.ll

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strictfp-sqrt-nonneg.ll

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sub.ll

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subnuw-with-xor.ll

[InstSimpify] Simplifying (xor (sub C_Mask, X), C_Mask) -> X (#122552 )

2025-01-11 15:10:42 -06:00

umax-1.ll

[InstSimplify] Simplify 'x u>= 1' to true when x is known non-zero (#145204 )

2025-06-22 13:32:19 +08:00

undef.ll

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uscmp.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

vec-cmp.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

vec-icmp-of-cast.ll

Reapply "[InstCombine] Match scalable splats in m_ImmConstant (#132522 )" (#134262 )

2025-04-03 18:03:16 +01:00

vector_gep.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00

vector_ptr_bitcast.ll

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vector-inseltextelt.ll

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vector-splice.ll

[IR] Allow non-constant offsets in @llvm.vector.splice.{left,right} (#174693 )

2026-01-21 10:58:40 +00:00

vp-reverse.ll

[InstSimplify] Ignore mask when combinining vp.reverse(vp.reverse). (#171542 )

2025-12-09 19:44:00 -08:00

vscale-inseltpoison.ll

[ConstantFold] Support scalable constant splats in ConstantFoldCastInstruction (#133207 )

2025-04-03 16:24:56 +01:00

vscale.ll

[ConstantFold] Support scalable constant splats in ConstantFoldCastInstruction (#133207 )

2025-04-03 16:24:56 +01:00

xor.ll

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548 )

2024-11-06 11:53:33 +00:00