Sanjay Patel e98ec77a95 [InstSimplify] delete shift-of-zero guard ops around funnel shifts ... This is a problem seen in common rotate idioms as noted in: https://bugs.llvm.org/show_bug.cgi?id=34924 Note that we are not canonicalizing standard IR (shifts and logic) to the intrinsics yet. (Although I've written this before...) I think this is the last step before we enable that transform. Ie, we could regress code by doing that transform without this simplification in place. In PR34924, I questioned whether this is a valid transform for target-independent IR, but I convinced myself this is ok. If we're speculating a funnel shift by turning cmp+br into select, then SimplifyCFG has already determined that the transform is justified. It's possible that SimplifyCFG is not taking into account profile or other metadata, but if that's true, then it's a bug independent of funnel shifts. Also, we do have CGP code to restore a guard like this around an intrinsic if it can't be lowered cheaply. But that isn't necessary for funnel shift because the default expansion in SelectionDAGBuilder includes this same cmp+select. Differential Revision: https://reviews.llvm.org/D54552 llvm-svn: 346960		2018-11-15 14:53:37 +00:00
..
2010-12-20-Boolean.ll	…
2011-01-14-Thread.ll	…
2011-02-01-Vector.ll	…
2011-09-05-InsertExtractValue.ll	InstructionSimplify: 'extractelement' with an undef index is undef	2017-12-06 17:51:46 +00:00
2011-10-27-BinOpCrash.ll	…
2011-11-23-MaskedBitsCrash.ll	…
2013-04-19-ConstantFoldingCrash.ll	…
AndOrXor.ll	[InstSimplify] fold extracting from std::pair (2/2)	2018-08-03 05:39:48 +00:00
add-mask.ll	…
add.ll	[InstSimplify] simplify add instruction if two operands are negative	2018-07-12 03:06:04 +00:00
addsub.ll	…
and-icmps-same-ops.ll	…
and-or-icmp-zero.ll	[InstSimplify] fold implied null ptr check (PR35790)	2018-01-13 15:44:44 +00:00
assume.ll	[DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label.	2018-05-09 02:40:45 +00:00
bitcast-vector-fold.ll	…
bitreverse-fold.ll	Move tests associated with transforms moved in r321467	2017-12-30 03:13:00 +00:00
bitreverse.ll	…
bswap.ll	…
call.ll	[InstSimplify] delete shift-of-zero guard ops around funnel shifts	2018-11-15 14:53:37 +00:00
cast-unsigned-icmp-cmp-0.ll	[PatternMatch] allow undef elements when matching a vector zero	2018-04-22 17:07:44 +00:00
cast.ll	…
compare.ll	llvm: Add support for "-fno-delete-null-pointer-checks"	2018-07-09 22:27:23 +00:00
constantfold-add-nuw-allones-to-allones.ll	[InstSimplify] add nuw %x, -1 -> -1 fold.	2018-06-08 15:44:47 +00:00
constantfold-shl-nuw-C-to-C.ll	[NFC][InstSimplify] One more negative test for shl nuw C, %x -> C fold.	2018-06-07 21:19:45 +00:00
dead-code-removal.ll	…
div.ll	[InstSimplify] fold div/rem of zexted bool	2018-06-25 18:51:21 +00:00
exact-nsw-nuw.ll	…
extract-element.ll	[instsimplify] consistently handle undef and out of bound indices for insertelement and extractelement	2017-12-30 05:54:22 +00:00
fast-math.ll	[FPEnv] PatternMatcher support for checking FNEG ignoring signed zeros	2018-10-09 21:48:00 +00:00
fcmp-select.ll	[InstSimplify] fold select (fcmp X, Y), X, Y	2018-11-05 21:51:39 +00:00
fdiv.ll	[InstSimplify] add tests for FP with undef operand; NFC	2018-02-27 20:17:18 +00:00
floating-point-arithmetic.ll	[InstCombine] InstCombine and InstSimplify for minimum and maximum	2018-10-19 19:01:26 +00:00
floating-point-compare.ll	[InstSimplify] fold 'fcmp nnan ult X, 0.0' when X is not negative	2018-10-31 15:35:46 +00:00
fold-builtin-fma.ll	…
fold-intrinsics.ll	Move tests associated with transforms moved in r321467	2017-12-30 03:13:00 +00:00
fp-nan.ll	[InstSimplify] fp_binop X, NaN --> NaN	2018-03-21 19:31:53 +00:00
fp-undef.ll	[InstSimplify] fp_binop X, undef --> NaN	2018-03-10 16:51:28 +00:00
gep.ll	[InstSimplify] regenerate checks, move tests; NFC	2018-03-23 15:31:31 +00:00
icmp-abs-nabs.ll	[InstSimplify] fold icmp based on range of abs/nabs (2nd try)	2018-11-01 14:07:39 +00:00
icmp-bool-constant.ll	[PatternMatch] enhance m_One() to ignore undef elements in vectors	2018-02-17 16:00:42 +00:00
icmp-constant.ll	…
icmp-ranges.ll	…
implies.ll	…
insertelement.ll	[instsimplify] consistently handle undef and out of bound indices for insertelement and extractelement	2017-12-30 05:54:22 +00:00
known-never-nan.ll	[InstSimplify] use isKnownNeverNaN to fold more fcmp ord/uno	2018-08-21 14:45:13 +00:00
load-relative-32.ll	…
load-relative.ll	…
load.ll	…
log-exp-intrinsic.ll	[InstSimplify] allow exp/log simplifications with only 'reassoc' FMF	2018-02-12 23:51:23 +00:00
logic-of-fcmps.ll	…
maxmin.ll	…
mul.ll	[PatternMatch] allow undef elements when matching a vector zero	2018-04-22 17:07:44 +00:00
negate.ll	[PatternMatch] allow undef elements when matching a vector zero	2018-04-22 17:07:44 +00:00
noalias-ptr.ll	…
or-icmps-same-ops.ll	…
or.ll	[PatternMatch, InstSimplify] enhance m_AllOnes() to ignore undef elements in vectors	2018-02-18 18:05:08 +00:00
past-the-end.ll	…
phi.ll	…
pr28725.ll	Reintroduce r320049, r320014 and r319894.	2017-12-13 11:21:18 +00:00
pr33957.ll	…
ptr_diff.ll	…
reassociate.ll	[InstSimplify] regenerate checks and add tests for commutes; NFC	2018-01-18 23:11:24 +00:00
rem.ll	[InstSimplify] fold srem with sext bool divisor	2018-06-26 15:32:54 +00:00
require-dominator.ll	…
returned.ll	…
sdiv.ll	[InstrSimplify] fold sdiv if two operands are negated and non-overflow	2018-07-21 12:27:54 +00:00
select-and-cmp.ll	[InstSimplify] Fold another Select with And/Or pattern	2018-07-31 14:17:15 +00:00
select-or-cmp.ll	[InstSimplify] Fold another Select with And/Or pattern	2018-07-31 14:17:15 +00:00
select.ll	Reland r301880(!): "[InstSimplify] Handle selects of GEPs with 0 offset"	2018-04-24 00:25:01 +00:00
shift-128-kb.ll	…
shift-knownbits.ll	…
shift.ll	[InstSimplify] fold extracting from std::pair (1/2)	2018-08-01 04:40:32 +00:00
shr-nop.ll	[InstSimplify] move tests for shifts; NFC	2018-04-21 16:58:00 +00:00
shufflevector.ll	…
signed-div-rem.ll	…
simplify-nested-bitcast.ll	…
srem.ll	[InstSimplify] fold srem instruction if its two operands are negated.	2018-07-20 13:00:47 +00:00
sub.ll	[InstCombine] move/add tests for sub/neg; NFC	2018-10-19 17:26:22 +00:00
undef.ll	…
vec-cmp.ll	…
vector_gep.ll	[ConstantFolding, InstSimplify] Handle more vector GEPs	2018-03-15 16:00:29 +00:00
vector_ptr_bitcast.ll	…