Miscellaneous fixes proposed for 3.5.1

[David Majnemer]

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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