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dd4b421516
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. :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8320 91177308-0d34-0410-b5e6-96231b3b80d8