James Molloy
bade86cedc
[SimplifyCFG] Fix nasty RAUW bug from r277325
...
Using RAUW was wrong here; if we have a switch transform such as:
18 -> 6 then
6 -> 0
If we use RAUW, while performing the second transform the *transformed* 6
from the first will be also replaced, so we end up with:
18 -> 0
6 -> 0
Found by clang stage2 bootstrap; testcase added.
llvm-svn: 277332
2016-08-01 09:34:48 +00:00
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