David Majnemer 9043f74acb InstCombine, InstSimplify: (%X /s C1) /s C2 isn't always 0 when C1 * C2 overflow ...

consider:
C1 = INT_MIN
C2 = -1

C1 * C2 overflows without a doubt but consider the following:
%x = i32 INT_MIN

This means that (%X /s C1) is 1 and (%X /s C1) /s C2 is -1.

N. B.  Move the unsigned version of this transform to InstSimplify, it
doesn't create any new instructions.

This fixes PR21243.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219567 91177308-0d34-0410-b5e6-96231b3b80d8

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

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2010-12-20-Boolean.ll

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2011-01-14-Thread.ll

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2011-02-01-Vector.ll

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2011-09-05-InsertExtractValue.ll

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2011-10-27-BinOpCrash.ll

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2011-11-23-MaskedBitsCrash.ll

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2013-04-19-ConstantFoldingCrash.ll

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AndOrXor.ll

InstSimplify: Simplify trivial and/or of icmps

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

apint-or.ll

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ashr-nop.ll

Move ashr optimization from InstCombineShift to InstSimplify.

2014-07-17 06:28:15 +00:00

assume.ll

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

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

call-callconv.ll

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call.ll

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compare.ll

InstSimplify: Move a transform from InstCombine to InstSimplify

2014-08-28 03:34:28 +00:00

dead-code-removal.ll

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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

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fdiv.ll

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floating-point-arithmetic.ll

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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

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past-the-end.ll

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phi.ll

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ptr_diff.ll

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reassociate.ll

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rem.ll

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

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

undef.ll

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vector_gep.ll

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