because it can add a module ID which we do not have at this time.
* Check to see if the module has been initialized when materializing it.
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construction. Now there may be multiple root blocks, and null is a
special node used to mark the "virtual" exit node of a CFG.
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We want to check for length 5 because we might get the "llvm." string as the
name. That string is in the LLVM namespace and should be checked as such.
We also don't have to worry about garbage data because (I believe) the string
class will return a valid value. So, the switch statement will work and we
don't have to worry about the code wandering into segfault land.
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be at least 6 characters, since something must follow the "llvm." string in the
function name.
This seems to fix an assertion failure with the SingleSource tests, too.
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call setAbstract). Now that we just compute abstractness we can also return
the computed value by value instead of as an argument.
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not correctly calculated, and calculating it wrong for fun seems rather
pointless. This also speeds up my favorite testcase by .25 seconds.
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we need to know anyway. This reduces the 2002-07-08-HugePerformanceProblem.llx
down to 3.210u:0.010s, which is back in the acceptable range again
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Now we're back to: 131.730u, 0.330s, which is still quite an improvement,
but still quite unacceptable
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the type is analyzed. Instead, only compute it when requested (with
getDescription), and cached for reuse later.
This dramatically speeds up LLVM in general because these descriptions almost
_never_ need to be constructed. The only time they are used is when a type is
<<'d. Printing of modules by themselves uses other code to print symbolic
types when possible, so these descriptions are really only used for debugging.
Also, this fixes the particularly bad case when lots of types get resolved to
each other, such as during linking of large programs. In these cases, the type
descriptions would be repeatedly recomputed and discarded even though: A. noone
reads the description before it gets resolved, and B. many many resolutions
happen at intermediate steps, causing a HUGE waste of time.
Overall, this makes the getTypeDesc function much more light-weight, and fixes
bug: Assembler/2002-07-08-HugePerformanceProblem.llx, which went from taking
1048.770u/19.150s (which is 17.5 MINUTES, on apoc), to taking 0.020u/0.000s,
which is a nice little speedup. :)
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Use new replaceAllUsesWith stuff in a way that works even though types have not yet been propagated
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