Bug 36839 - mcs emits wrong code for char pointer arithmetic
Summary: mcs emits wrong code for char pointer arithmetic
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: unspecified
Hardware: All All
: --- normal
Target Milestone: ---
Assignee: Marek Safar
Depends on:
Reported: 2015-12-10 17:49 UTC by Alexander Köplinger [MSFT]
Modified: 2015-12-11 16:56 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

test.cs (425 bytes, text/plain)
2015-12-10 17:49 UTC, Alexander Köplinger [MSFT]

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Description Alexander Köplinger [MSFT] 2015-12-10 17:49:30 UTC
Created attachment 14228 [details]

Compile attached test.cs with:
> mcs /unsafe test.cs

and run it (with a 64bit Mono!), result is:

>64bit: True
>p:    109800038
>end:   89800038

The pointer wrapped over, which shouldn't be the case.

Running the same code compiled with MS csc produces the expected result:

>64bit: True
>p:    109200038
>end:  189200038

If I cast the "count" variable to long, then the problem goes away on mcs as well.
Comment 1 Marek Safar 2015-12-11 16:56:59 UTC
Fixed in master