Displaying 1 result from an estimated 1 matches for "97b82969".
2015 Jun 02
3
[LLVMdev] BasicAA unable to analyze recursive PHI nodes
Hi all,
I came across the following limitation in our BasicAliasAnalysis. This
happens with the following IR pattern:
%x = phi [ %incptr, ... ] [ %var, ... ]
%incptr = getelementptr %x, 1
We will basically always return MayAlias for %x and any other value
because aliasPHI recurses on the first value and gives up.
There are, however, many cases where this is too conservative.
Take the