David Majnemer 651ed5e8fd InstSimplify: Fix a bug when INT_MIN is in a sdiv ...

When INT_MIN is the numerator in a sdiv, we would not properly handle
overflow when calculating the bounds of possible values; abs(INT_MIN) is
not a meaningful number.

Instead, check and handle INT_MIN by reasoning that the largest value is
INT_MIN/-2 and the smallest value is INT_MIN.

This fixes PR20199.

llvm-svn: 212307

2014-07-04 00:23:39 +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

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

2013-07-14 01:42:54 +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

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

InstSimplify: Fix a bug when INT_MIN is in a sdiv

2014-07-04 00:23:39 +00:00

dead-code-removal.ll

RecursivelyDeleteTriviallyDeadInstructions() could remove

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

exact-nsw-nuw.ll

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

2013-07-14 01:42:54 +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

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

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

2013-07-14 01:42:54 +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