David Majnemer c6ab01ecca IndVarSimplify: Don't let LFTR compare against a poison value ...

LinearFunctionTestReplace tries to use the *next* indvar to compare
against when possible.  However, it may be the case that the calculation
for the next indvar has NUW/NSW flags and that it may only be safely
used inside the loop.  Using it in a comparison to calculate the exit
condition could result in observing poison.

This fixes PR20680.

Differential Revision: http://reviews.llvm.org/D5174

llvm-svn: 217102

2014-09-03 23:03:18 +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

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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

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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

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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

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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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2009-04-14-shorten_iv_vars.ll

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

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2011-09-10-widen-nsw.ll

[INDVARS] Extend using of widening of induction variables for the cases of "sub nsw" and "mul nsw" instructions.

2014-08-21 08:25:45 +00:00

2011-09-19-vectoriv.ll

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2011-09-27-hoistsext.ll

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2011-10-27-lftrnull.ll

IndVarSimplify: Don't let LFTR compare against a poison value

2014-09-03 23:03:18 +00:00

2011-11-01-lftrptr.ll

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

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

2011-11-15-multiexit.ll

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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

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

2013-07-14 01:42:54 +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

Add a description to the test from r211433 explaining why it's written that way.

2014-06-22 12:22:04 +00:00

ada-loops.ll

Remove redundant -enable-iv-rewrite=false flags from test cases.

2012-03-22 17:09:04 +00:00

ashr-tripcount.ll

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avoid-i0.ll

Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.

2011-11-27 06:54:59 +00:00

casted-argument.ll

Fix declarations in a few more tests.

2010-04-17 21:29:25 +00:00

crash.ll

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

2012-12-30 02:33:22 +00:00

dangling-use.ll

Manually notify ScalarEvolution before making an operand replacement, since

2010-04-02 14:48:31 +00:00

divide-pointer.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

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

Remove redundant -enable-iv-rewrite=false flags from test cases.

2012-03-22 17:09:04 +00:00

eliminate-comparison.ll

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

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

eliminate-max.ll

Convert all tests using TCL-style quoting to use shell-style quoting.

2012-07-02 12:47:22 +00:00

eliminate-rem.ll

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

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

exit_value_tests.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +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

indirectbr.ll

Disable indvars on loops when LoopSimplify form is not available.

2010-06-18 01:35:11 +00:00

interesting-invoke-use.ll

Update to new EH scheme.

2011-09-01 01:02:41 +00:00

iterationCount_zext_or_trunc.ll

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iv-fold.ll

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

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

iv-sext.ll

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iv-widen.ll

Reapply r198654 "indvars: sink truncates outside the loop."

2014-01-07 06:59:12 +00:00

iv-zext.ll

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lcssa-preservation.ll

[LPM] Fix PR18642, a pretty nasty bug in IndVars that "never mattered"

2014-01-29 04:40:19 +00:00

lftr_simple.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

lftr-address-space-pointers.ll

IndVarSimplify: Don't let LFTR compare against a poison value

2014-09-03 23:03:18 +00:00

lftr-extend-const.ll

IndVarSimplify: Don't let LFTR compare against a poison value

2014-09-03 23:03:18 +00:00

lftr-other-uses.ll

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lftr-promote.ll

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lftr-reuse.ll

IndVarSimplify: Don't let LFTR compare against a poison value

2014-09-03 23:03:18 +00:00

lftr-zext.ll

Fix a bug in LinearFunctionTestReplace that created invalid loop exit checks.

2013-10-24 05:29:56 +00:00

loop_evaluate7.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

loop_evaluate8.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

loop_evaluate9.ll

Fix the remaining TCL-style quotes found in the testsuite. This is

2012-07-02 19:09:46 +00:00

loop_evaluate10.ll

Fix the remaining TCL-style quotes found in the testsuite. This is

2012-07-02 19:09:46 +00:00

loop_evaluate11.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

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

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

loop_evaluate_3.ll

Convert all tests using TCL-style quoting to use shell-style quoting.

2012-07-02 12:47:22 +00:00

loop_evaluate_4.ll

Convert all tests using TCL-style quoting to use shell-style quoting.

2012-07-02 12:47:22 +00:00

loop_evaluate_5.ll

Convert all tests using TCL-style quoting to use shell-style quoting.

2012-07-02 12:47:22 +00:00

loop_evaluate_6.ll

Rewrite SCEV's backedge taken count computation.

2013-11-06 02:08:26 +00:00

masked-iv.ll

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no-iv-rewrite.ll

Rewrite SCEV's backedge taken count computation.

2013-11-06 02:08:26 +00:00

overflowcheck.ll

Add support to indvars for optimizing sadd.with.overflow.

2013-12-23 23:31:49 +00:00

phi-uses-value-multiple-times.ll

Revert the test moves from 176733. Use "REQUIRES: asserts" instead.

2013-03-12 16:27:52 +00:00

polynomial-expand.ll

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pr18223.ll

ScalarEvolution: Fix handling of AddRecs in isKnownPredicate

2014-05-23 00:06:56 +00:00

pr20680.ll

IndVarSimplify: Don't let LFTR compare against a poison value

2014-09-03 23:03:18 +00:00

preserve-signed-wrap.ll

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promote-iv-to-eliminate-casts.ll

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shrunk-constant.ll

Convert all tests using TCL-style quoting to use shell-style quoting.

2012-07-02 12:47:22 +00:00

signed-trip-count.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

single-element-range.ll

Remove arm_apcscc from the test files. It is the default and doing this

2010-06-17 15:18:27 +00:00

sink-alloca.ll

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sink-trapping.ll

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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

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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

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

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

uglygep.ll

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ult-sub-to-eq.ll

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

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

variable-stride-ivs-0.ll

Remove redundant -enable-iv-rewrite=false flags from test cases.

2012-03-22 17:09:04 +00:00

variable-stride-ivs-1.ll

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

verify-scev.ll

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widen-nsw.ll

Teach indvars to generate nsw/nuw flags when widening an induction variable.

2013-07-14 02:50:07 +00:00