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archived-llvm/test/Transforms/IndVarSimplify
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Sanjoy Das 9b2526d03d [ValueTracking] Don't do an unchecked shift in ComputeNumSignBits 
Summary:
Previously we used to return a bogus result, 0, for IR like `ashr %val,
-1`.

I've also added an assert checking that `ComputeNumSignBits` at least
returns 1.  That assert found an already checked in test case where we
were returning a bad result for `ashr %val, -1`.

Fixes PR32045.

Reviewers: spatel, majnemer

Reviewed By: spatel, majnemer

Subscribers: efriedma, mcrosier, llvm-commits

Differential Revision: https://reviews.llvm.org/D30311

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296273 91177308-0d34-0410-b5e6-96231b3b80d8
2017-02-25 20:30:45 +00:00
..
AMDGPU
AMDGPU: Cost model for basic integer operations
2016-03-25 01:16:40 +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
…
2003-04-16-ExprAnalysis.ll
…
2003-09-23-NotAtTop.ll
…
2003-12-10-RemoveInstrCrash.ll
…
2003-12-15-Crash.ll
…
2004-03-10-PHIInsertionBug.ll
…
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
…
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
…
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
…
2006-12-10-BitCast.ll
…
2007-01-06-TripCount.ll
[IndVars] Un-grepify test; NFC
2016-08-03 20:53:23 +00:00
2007-06-06-DeleteDanglesPtr.ll
…
2007-11-23-BitcastCrash.ll
…
2008-06-15-SCEVExpanderBug.ll
…
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
…
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
…
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
…
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
…
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
[opaque pointer type] Add textual IR support for explicit type parameter to gep operator
2015-03-13 18:20:45 +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
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
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
…
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-apply r251050 with a for PR25421
2015-11-05 23:45:38 +00:00
eliminate-max.ll
[IndVars] Un-grepify test; NFC
2016-08-03 20:53:23 +00:00
eliminate-rem.ll
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
exit_value_test2.ll
Enable exitValue rewrite only when the cost of expansion is low.
2015-05-28 21:49:07 +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
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
…
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_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
…
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
…
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] Make loop varying predicates loop invariant.
2015-07-27 21:42:49 +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
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
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
Fix PR22222
2015-01-15 01:46:09 +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
[SCEV] Try to reuse existing value during SCEV expansion
2016-02-04 01:27:38 +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
[IndVars] Fix a bug in r248045.
2015-09-20 01:52:18 +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