caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
982e8d48f82d86d6d3030845e01a94de65ee7f2c
clang-p2996/llvm/test/Transforms/IndVarSimplify
History
Hal Finkel a8d205f145 Make ScalarEvolution::isKnownPredicate a little smarter 
Here we make ScalarEvolution::isKnownPredicate, indirectly, a little smarter.
Given some relational comparison operator OP, and two AddRec SCEVs, {I,+,S} OP
{J,+,T}, we can reduce this to the comparison I OP J when S == T, both AddRecs
are for the same loop, and both are known not to wrap.

As it turns out, because of the way that backedge-guard expressions can be
leveraged when computing known predicates, this allows indvars to simplify the
if-statement comparison in this loop:

  void foo (int *a, int *b, int n) {
    for (int i = 0; i < n; ++i) {
      if (i > n)
        a[i] = b[i] + 1;
    }
  }

which, somewhat surprisingly, we were not previously optimizing away.

llvm-svn: 245400
2015-08-19 01:51:51 +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
…
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
…
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
…
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
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
2007-06-06-DeleteDanglesPtr.ll
…
2007-11-23-BitcastCrash.ll
…
2008-06-15-SCEVExpanderBug.ll
…
2008-09-02-IVType.ll
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +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
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
2009-04-15-shorten-iv-vars-2.ll
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +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
Verifier: Call verifyModule() from llc and opt
2015-03-27 22:04:28 +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
…
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
…
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
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +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
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction
2015-02-27 19:29:02 +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
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
…
elim-extend.ll
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction
2015-02-27 19:29:02 +00:00
eliminate-comparison.ll
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
eliminate-max.ll
[opaque pointer type] Add textual IR support for explicit type parameter to the call instruction
2015-04-16 23:24:18 +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
…
floating-point-iv.ll
…
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.ll
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +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
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +00:00
lftr-address-space-pointers.ll
Revert some changes that were made to fix PR20680.
2015-03-02 21:41:07 +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
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +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-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
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
loop_evaluate9.ll
[opaque pointer type] Add textual IR support for explicit type parameter to gep operator
2015-03-13 18:20:45 +00:00
loop_evaluate10.ll
…
loop_evaluate11.ll
…
loop_evaluate_1.ll
…
loop_evaluate_2.ll
…
loop_evaluate_3.ll
…
loop_evaluate_4.ll
…
loop_evaluate_5.ll
…
loop_evaluate_6.ll
…
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
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction
2015-02-27 19:29:02 +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
overflowcheck.ll
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +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
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
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
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +00:00
sharpen-range.ll
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
shrunk-constant.ll
…
signed-trip-count.ll
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +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
…
strengthen-overflow.ll
Fix PR22222
2015-01-15 01:46:09 +00:00
tripcount_compute.ll
…
tripcount_infinite.ll
FileCheck'ify some wc/grep based tests; NFCI.
2015-07-28 03:50:09 +00:00
udiv-invariant-but-traps.ll
…
udiv.ll
[opaque pointer type] Add textual IR support for explicit type parameter to the call instruction
2015-04-16 23:24:18 +00:00
uglygep.ll
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction
2015-02-27 21:17:42 +00:00
ult-sub-to-eq.ll
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +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
Make DataLayout Non-Optional in the Module
2015-03-04 18:43:29 +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