David Majnemer a8f61a4be6 InstSimplify: Exact shifts of X by Y are X if X has the lsb set ...

Exact shifts may not shift out any non-zero bits. Use computeKnownBits
to determine when this occurs and just return the left hand side.

This fixes PR21477.

llvm-svn: 221325

2014-11-05 00:59:59 +00:00

..

2010-12-20-Boolean.ll

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

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

2011-01-14-Thread.ll

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

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

2011-02-01-Vector.ll

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

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

2011-09-05-InsertExtractValue.ll

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

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

2011-10-27-BinOpCrash.ll

Reapply commit 143028 with a fix: the problem was casting a ConstantExpr Mul

2011-10-27 19:16:21 +00:00

2011-11-23-MaskedBitsCrash.ll

Fix a crash in which a multiplication was being reported as being both negative

2011-11-23 16:26:47 +00:00

2013-04-19-ConstantFoldingCrash.ll

ConstantFolding: ComputeMaskedBits wants the scalar size for vectors.

2013-04-19 16:56:24 +00:00

AndOrXor.ll

InstSimplify: Simplify trivial and/or of icmps

2014-09-15 08:15:28 +00:00

apint-or.ll

Move optimization of some cases of (A & C1)|(B & C2) from instcombine to instsimplify. Patch by Rahul Jain, plus some last minute changes by me -- you can blame me for any bugs.

2014-06-19 03:51:46 +00:00

assume.ll

Add @llvm.assume, lowering, and some basic properties

2014-07-25 21:13:35 +00:00

call-callconv.ll

[SimplifyLibCalls] Library call simplification doen't work if the call site

2013-02-08 18:00:14 +00:00

call.ll

Verify that we don't optimize null return checks to the nothrow_t version of operator new.

2013-09-24 18:37:49 +00:00

compare.ll

Introduce a 'nonnull' metadata on Load instructions.

2014-10-20 22:40:55 +00:00

dead-code-removal.ll

RecursivelyDeleteTriviallyDeadInstructions() could remove

2014-04-26 05:58:11 +00:00

exact-nsw-nuw.ll

InstCombine, InstSimplify: (%X /s C1) /s C2 isn't always 0 when C1 * C2 overflow

2014-10-11 10:20:01 +00:00

fast-math.ll

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

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

fdiv.ll

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

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

floating-point-arithmetic.ll

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

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

fold-builtin-fma.ll

Revert "r216914 - Revert: [APFloat] Fixed a bug in method 'fusedMultiplyAdd'"

2014-10-14 19:23:07 +00:00

gep.ll

InstSimplify: Don't simplify gep X, (Y-X) to Y if types differ

2014-08-27 20:08:34 +00:00

maxmin.ll

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

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

past-the-end.ll

Add a testcase for some past-the-end address subtleties.

2013-02-01 19:37:52 +00:00

phi.ll

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

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

ptr_diff.ll

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

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

reassociate.ll

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

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

rem.ll

InstSimplify: Don't allow (x srem y) urem y -> x srem y

2014-09-17 04:16:35 +00:00

shr-nop.ll

InstSimplify: Exact shifts of X by Y are X if X has the lsb set

2014-11-05 00:59:59 +00:00

undef.ll

InstSimplify: Make shift, select and GEP simplifications vector-aware.

2014-01-24 17:09:53 +00:00

vector_gep.ll

InstSimplify: Make shift, select and GEP simplifications vector-aware.

2014-01-24 17:09:53 +00:00

vector_ptr_bitcast.ll

[InstSimplify] Support constant folding to vector of pointers

2014-10-22 12:18:48 +00:00