Chris Lattner dd4b421516 Change the code to no longer compute the "type description" immediately when ... 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		2003-09-02 16:35:17 +00:00
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Analysis	This file is hopelessly out of date	2003-09-01 20:14:00 +00:00
Archive	Merged in autoconf branch. This provides configuration via the autoconf	2003-06-30 21:59:07 +00:00
AsmParser	Remove gross old hacky code that was in there for backwards compatibility	2003-09-01 16:31:28 +00:00
Bytecode	Allow modules to have 'any' pointer size and endianness. Luckily, we had	2003-08-24 13:47:36 +00:00
CodeGen	Don't build dead directories	2003-09-01 20:34:15 +00:00
ExecutionEngine	Preselection is now integrated into the Sparc target library	2003-09-01 20:30:17 +00:00
Linker	Fix bug where we considered function types equivalent even if they had differing numbers of arguments	2003-08-28 16:42:50 +00:00
Support	Mangle ALL letters that we do not allow, not just a few.	2003-08-24 21:08:38 +00:00
Target	OptInfo is no longer required	2003-09-01 20:41:07 +00:00
Transforms	Prototype for creator function got moved	2003-09-01 20:45:33 +00:00
VMCore	Change the code to no longer compute the "type description" immediately when	2003-09-02 16:35:17 +00:00
Makefile	Reoptimizer has moved to reopt cvs module.	2003-08-21 20:32:04 +00:00