Miscellaneous fixes proposed for 3.5.1

[David Majnemer]

Ping on all of these other than r221318.

On Thu, Dec 4, 2014 at 1:28 AM, David Majnemer <david.majnemer at gmail.com>
wrote:

> Ping.
>
> On Wed, Nov 26, 2014 at 3:11 PM, David Majnemer <david.majnemer at gmail.com>
> wrote:
>
>> to this list, I would add:
>> r222856 Revert "Added inst combine transforms for single bit tests from
>> Chris's note"
>>
>> On Tue, Nov 25, 2014 at 11:50 PM, David Majnemer <
>> david.majnemer at gmail.com> wrote:
>>
>>> Hi, I think the following list of commit revisions should be merged into
>>> 3.5.1:
>>>
>>> r214385 InstCombine: Correctly propagate NSW/NUW for x-(-A) -> x+A
>>> r215818 InstCombine: Fix a potential bug in 0 - (X sdiv C)  -> (X sdiv
>>> -C)
>>> r216261 InstCombine: Don't unconditionally preserve 'nsw' when
>>> shrinking constants
>>> r216273 InstCombine: Don't unconditionally preserve 'nuw' when
>>> shrinking constants
>>> r216911 LICM: Don't crash when an instruction is used by an unreachable
>>> BB
>>> r219566 InstCombine: mul to shl shouldn't preserve nsw
>>> r219567 InstCombine, InstSimplify: (%X /s C1) /s C2 isn't always 0 when
>>> C1 * C2 overflow
>>> r219568 InstCombine: Don't fold (X <<s log(INT_MIN)) /s INT_MIN to X
>>> r219634 InstCombine: Don't miscompile (x lshr C1) udiv C2
>>> r219639 InstCombine: Fix miscompile in X % -Y -> X % Y transform
>>> r219713 InstCombine: Don't miscompile X % ((Pow2 << A) >>u B)
>>> r220664 InstCombine: Fix a combine assuming that icmp operands were
>>> integers
>>> r221069 InstCombine: Don't assume that m_ZExt matches an Instruction
>>> r221187 InstCombine: Remove infinite loop caused by FoldOpIntoPhi
>>> r221318 Analysis: Make isSafeToSpeculativelyExecute fire less for
>>> divides
>>> r221513 SCCP: overdefined calls cannot become constant
>>> r222040 InstCombine: Fix infinite loop caused by visitFPTrunc
>>> r222093 ScalarEvolution: HowFarToZero was wrongly using signed division
>>> r222104 ScalarEvolution: Introduce SCEVSDivision and SCEVUDivision
>>> r222126 ScalarEvolution: Construct SCEVDivision's Derived type instead
>>> of itself
>>> r222265 InstCombine: Fix another infinite loop caused by visitFPTrunc
>>>
>>> --
>>> David Majnemer
>>>
>>
>>
>
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