Jonas Jensen 8c06a68835 C++ IR: Remove redundant check for same function ...

The check that an instruction is in the same function as its operands is
hopefully redundant and can be removed. Just to be sure, I've added the
check to a sanity query.

This check turned out to cause bad performance in the alias analysis
because it got inlined into `AliasAnalysis::resultEscapes` and then
pulled out to a loop-invariant predicate that got a bad join order. With
this check removed, the `ssa/AliasAnalysis.qll` file is orders of
magnitude faster.

2018-08-09 15:36:52 +02:00

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ql

C++ IR: Remove redundant check for same function

2018-08-09 15:36:52 +02:00