Philip Reames 0fed3ad4cb [IndVars] Fix a bug introduced in r317012 ...

Turns out we can have comparisons which are indirect users of the induction variable that we can make invariant.  In this case, there is no loop invariant value contributing and we'd fail an assert.

The test case was found by a java fuzzer and reduced.  It's a real cornercase.  You have to have a static loop which we've already proven only executes once, but haven't broken the backedge on, and an inner phi whose result can be constant folded by SCEV using exit count reasoning but not proven by isKnownPredicate.  To my knowledge, only the fuzzer has hit this case.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@319583 91177308-0d34-0410-b5e6-96231b3b80d8

2017-12-01 20:57:19 +00:00

..

AMDGPU

AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel

2017-03-21 21:39:51 +00:00

NVPTX

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +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

Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID

2012-12-30 01:28:40 +00:00

2003-12-10-RemoveInstrCrash.ll

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2003-12-15-Crash.ll

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2004-03-10-PHIInsertionBug.ll

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2004-04-05-InvokeCastCrash.ll

Move the personality function from LandingPadInst to Function

2015-06-17 20:52:32 +00:00

2004-04-07-ScalarEvolutionCrash.ll

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2005-02-11-InvokeCrash.ll

Move the personality function from LandingPadInst to Function

2015-06-17 20:52:32 +00:00

2005-02-17-TruncateExprCrash.ll

Move the personality function from LandingPadInst to Function

2015-06-17 20:52:32 +00:00

2005-02-26-ExitValueCompute.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

2005-06-15-InstMoveCrash.ll

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2005-11-18-Crash.ll

[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

2015-03-13 18:20:45 +00:00

2006-03-31-NegativeStride.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

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

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

2006-09-20-LFTR-Crash.ll

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2006-12-10-BitCast.ll

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2007-01-06-TripCount.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

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

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

2008-10-03-CouldNotCompute.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

2008-11-25-APFloatAssert.ll

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2009-04-14-shorten_iv_vars.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

2009-04-15-shorten-iv-vars-2.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

2009-04-22-IndvarCrash.ll

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2009-04-27-Floating.ll

Make DataLayout Non-Optional in the Module

2015-03-04 18:43:29 +00:00

2009-05-24-useafterfree.ll

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2011-09-10-widen-nsw.ll

This patch teaches IndVarSimplify to add nuw and nsw to certain kinds

2015-01-06 19:02:56 +00:00

2011-09-19-vectoriv.ll

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2011-09-27-hoistsext.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

2011-10-27-lftrnull.ll

ConstantFold: Fold getelementptr (i32, i32* null, i64 undef) to null.

2017-05-08 17:37:29 +00:00

2011-11-01-lftrptr.ll

opt: Rename -default-data-layout flag to -data-layout and make it always override the layout.

2017-02-17 17:36:52 +00:00

2011-11-15-multiexit.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

2011-11-17-selfphi.ll

Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.

2013-07-14 01:42:54 +00:00

2012-07-17-lftr-undef.ll

[opaque pointer type] Add textual IR support for explicit type parameter to the call instruction

2015-04-16 23:24:18 +00:00

2012-10-19-congruent-constant.ll

Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.

2013-07-14 01:42:54 +00:00

2014-06-21-congruent-constant.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

ada-loops.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

ashr-tripcount.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

avoid-i0.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

backedge-on-min-max.ll

[PM] Port IndVarSimplify to the new pass manager

2016-06-05 18:01:19 +00:00

bec-cmp.ll

Make ScalarEvolution::isKnownPredicate a little smarter

2015-08-19 01:51:51 +00:00

canonicalize-cmp.ll

Re-enable "[IndVars] Canonicalize comparisons between non-negative values and indvars"

2017-07-08 17:17:30 +00:00

casted-argument.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

const_phi.ll

Fix PR25372 - teach replaceCongruentPHIs to handle cases where SE evaluates a PHI to a SCEVConstant

2015-11-03 16:27:04 +00:00

constant-fold.ll

[SimplifyIndVar] Do not fail when we constant fold an IV user to ConstantPointerNull

2017-09-29 16:32:12 +00:00

crash.ll

Move the personality function from LandingPadInst to Function

2015-06-17 20:52:32 +00:00

dangling-use.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

divide-pointer.ll

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dont-recompute.ll

Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.

2013-07-14 01:42:54 +00:00

elim-extend.ll

Extend trip count instead of truncating IV in LFTR, when legal

2016-08-11 21:31:40 +00:00

eliminate-comparison.ll

Re-enable "[IndVars] Canonicalize comparisons between non-negative values and indvars"

2017-07-08 17:17:30 +00:00

eliminate-max.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

eliminate-rem.ll

[SimplifyIndvar] Replace the srem used by IV if we can prove both of its operands are non-negative

2017-09-25 17:39:40 +00:00

exit_value_test2.ll

[SCEV/IndVars] Always compute loop exiting values if the backedge count is 0

2017-08-01 22:37:58 +00:00

exit_value_test3.ll

Enable exitValue rewrite only when the cost of expansion is low.

2015-05-28 21:49:07 +00:00

exit_value_tests.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

floating-point-iv.ll

Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.

2013-07-14 01:42:54 +00:00

huge_muls.ll

[SCEV] Make MulOpsInlineThreshold lower to avoid excessive compilation time

2017-06-21 07:28:13 +00:00

indirectbr.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

interesting-invoke-use.ll

Move the personality function from LandingPadInst to Function

2015-06-17 20:52:32 +00:00

iterationCount_zext_or_trunc.ll

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iv-fold.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

iv-sext.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

iv-widen-elim-ext.ll

[IndVars] Change the order to compute WidenAddRec in widenIVUse.

2016-11-15 17:34:52 +00:00

iv-widen.ll

[IndVars] Change the order to compute WidenAddRec in widenIVUse.

2016-11-15 17:34:52 +00:00

iv-zext.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

lcssa-preservation.ll

Enable exitValue rewrite only when the cost of expansion is low.

2015-05-28 21:49:07 +00:00

lftr_disabled.ll

[IndVars] Add an option to be able to disable LFTR

2017-06-09 06:11:59 +00:00

lftr_simple.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

lftr-address-space-pointers.ll

[SCEV] Try to reuse existing value during SCEV expansion

2016-02-04 01:27:38 +00:00

lftr-extend-const.ll

Make DataLayout Non-Optional in the Module

2015-03-04 18:43:29 +00:00

lftr-other-uses.ll

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lftr-promote.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

lftr-reuse.ll

Revert some changes that were made to fix PR20680.

2015-03-02 21:41:07 +00:00

lftr-udiv-tripcount.ll

[SCEV] Strengthen SCEVExpander::isHighCostExpansion.

2015-04-14 03:20:32 +00:00

lftr-wide-trip-count.ll

Extend trip count instead of truncating IV in LFTR, when legal

2016-08-11 21:31:40 +00:00

lftr-zext.ll

[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

2015-03-13 18:20:45 +00:00

loop_evaluate7.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

loop_evaluate8.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate9.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate10.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate11.ll

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loop_evaluate_1.ll

Add test case for PR12377, it was fixed by r194116.

2013-11-06 11:55:41 +00:00

loop_evaluate_2.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate_3.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate_4.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate_5.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop_evaluate_6.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

loop-invariant-conditions.ll

[IndVars] Fix a bug introduced in r317012

2017-12-01 20:57:19 +00:00

lrev-existing-umin.ll

[IndVars] Try to use existing values in RewriteLoopExitValues.

2015-07-09 18:46:12 +00:00

masked-iv.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

no-iv-rewrite.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

overflow-intrinsics.ll

[IndVars] Eliminate op.with.overflow when possible (re-apply)

2016-05-29 00:36:25 +00:00

phi-uses-value-multiple-times.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

polynomial-expand.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

post-inc-range.ll

[IndVarSimplify] Teach calculatePostIncRange to take guards into account

2016-10-19 19:43:54 +00:00

pr18223.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

pr20680.ll

Make DataLayout Non-Optional in the Module

2015-03-04 18:43:29 +00:00

pr22222.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

pr24356.ll

[IndVars] Fix PR24356.

2015-08-06 20:43:41 +00:00

pr24783.ll

[SCEV] Try to reuse existing value during SCEV expansion

2016-02-04 01:27:38 +00:00

pr24804.ll

[SCEVExpander] Have hoistIVInc preserve LCSSA

2015-12-08 00:13:17 +00:00

pr24952.ll

[SCEV] identical instructions don't compute equal values

2015-09-27 21:09:48 +00:00

pr24956.ll

[SCEV] Don't crash on pointer comparisons

2015-09-28 21:14:32 +00:00

pr25047.ll

[IndVars] Preserve LCSSA in eliminateIdentitySCEV

2015-10-07 17:38:31 +00:00

pr25051.ll

[IndVars] Don't break dominance in eliminateIdentitySCEV

2015-10-06 21:44:49 +00:00

pr25060.ll

[SCEV] Pick backedge values for phi nodes correctly

2015-10-08 18:28:36 +00:00

pr25360.ll

[SCEV] Don't create SCEV expressions that break LCSSA

2015-10-31 23:21:40 +00:00

pr25421.ll

Re-apply r251050 with a for PR25421

2015-11-05 23:45:38 +00:00

pr25576.ll

[IndVars] Fix PR25576

2016-01-17 18:12:52 +00:00

pr25578.ll

[IndVars] Have getInsertPointForUses preserve LCSSA

2015-12-08 00:13:21 +00:00

pr26207.ll

[SCEV] Fix PR26207

2016-01-19 20:53:51 +00:00

pr26973.ll

[IndVars] Pass the right loop to isLoopInvariantPredicate

2016-03-18 20:37:07 +00:00

pr26974.ll

[IndVars] Fix PR26974: make sure replaceCongruentIVs doesn't break LCSSA

2016-03-21 12:44:29 +00:00

pr27133.ll

[IndVarSimplify] Don't insert after a catchswitch

2016-03-30 21:12:06 +00:00

pr28935.ll

[IndVars] Ignore (s|z)exts that don't extend the induction variable

2016-08-13 00:58:31 +00:00

pr32045.ll

[ValueTracking] Don't do an unchecked shift in ComputeNumSignBits

2017-02-25 20:30:45 +00:00

preserve-signed-wrap.ll

Make DataLayout Non-Optional in the Module

2015-03-04 18:43:29 +00:00

promote-iv-to-eliminate-casts.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

replace-iv-with-loop-invariant.ll

[SimplifyIndVar] Replace IVUsers with loop invariant whenever possible

2017-10-12 02:54:11 +00:00

replace-sdiv-by-udiv.ll

[SimplifyIndvar] Replace the sdiv used by IV if we can prove both of its operands are non-negative

2017-03-30 21:56:56 +00:00

replace-srem-by-urem.ll

[SimplifyIndVar] Constant fold IV users

2017-09-27 03:11:46 +00:00

rewrite-loop-exit-value.ll

[IndVarSimplify] Rewrite loop exit values with their initial values from loop preheader

2016-01-27 07:40:41 +00:00

scev-phi-debug-info.ll

IndVarSimplify: preserve debug information attached to widened PHI nodes.

2017-11-02 23:17:06 +00:00

sharpen-range.ll

[PM] Port IndVarSimplify to the new pass manager

2016-06-05 18:01:19 +00:00

shrunk-constant.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

signed-trip-count.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

single-element-range.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

sink-alloca.ll

[opaque pointer type] Add textual IR support for explicit type parameter to the call instruction

2015-04-16 23:24:18 +00:00

sink-trapping.ll

[LLVM] Remove unwanted --check-prefix=CHECK from unit tests. NFC.

2016-04-19 23:51:52 +00:00

strengthen-overflow.ll

[IndVarSimplify] Add AShr exact flags using induction variables ranges.

2017-07-05 13:25:58 +00:00

tripcount_compute.ll

Fix PR18449: SCEV needs more precise max BECount for multi-exit loop.

2014-01-15 06:42:11 +00:00

tripcount_infinite.ll

FileCheck'ify some wc/grep based tests; NFCI.

2015-07-28 03:50:09 +00:00

udiv-invariant-but-traps.ll

Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.

2013-07-14 01:42:54 +00:00

udiv.ll

Revert rL316568 because of sudden performance drop on ARM

2017-10-27 04:17:44 +00:00

uglygep.ll

[IndVars] Un-grepify test; NFC

2016-08-03 20:53:23 +00:00

ult-sub-to-eq.ll

Extend trip count instead of truncating IV in LFTR, when legal

2016-08-11 21:31:40 +00:00

use-range-metadata.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

variable-stride-ivs-0.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

variable-stride-ivs-1.ll

…

verify-scev.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

widen-loop-comp.ll

Re-enable "[IndVars] Canonicalize comparisons between non-negative values and indvars"

2017-07-08 17:17:30 +00:00

widen-nsw.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

zext-nuw.ll

ScalarEvolution: do not set nuw when creating exprs of form <expr> + <all-ones>.

2015-11-20 01:26:13 +00:00