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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
4.0 KiB
Plaintext
78 lines
4.0 KiB
Plaintext
* Need to implement constant propogation of cast instructions!
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* Fix DCE to elminate br <c>, %L1, %L1 so that it can optimize the main of
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fib.ll better. Currently I have to do this to get best results:
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as < fib.ll | opt -inline -sccp -dce -sccp -dce |dis
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* Fix DCE to work better, so that SCCP can show it's true value.
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* Implement ADCE
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* Fix the const pool printer to print out constants in some sort of "sorted"
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order. Then enable TestOptimizer.sh to diff -sccp output. Currently it
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doesn't work because the diff fails because of ordering of the constant
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pool. :(
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* Enable DoConstantPoolMerging to do trivial DCE of constant values.
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* Should provide "castTerminator, castPHI, etc" functions in Instruction, and
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similar functions in other classes, that effectively do dynamic casts. This
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would allow code like this:
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if (I->isTerminator()) {
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TerminatorInst *TI = (TerminatorInst*)I;
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...
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}
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to be written as:
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if (TerminatorInst *TI = I->castTerminatorInst()) {
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...
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}
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* Think about whether edge split SSA form would be useful to do.
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* Inlining should attempt to give block names the same name in the inlined
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method (using SymbolTable::getUniqueName)
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* The dropAllReferences code can be a noop when NDEBUG!!!
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* Finish xvcg output
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* pred/succ iterators on basic blocks don't handle switch statements correctly
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* Enhance BB to make predecessor handling easier (to update PHI nodes)
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* Provide a pass that eliminates critical edges from the CFG
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* Provide a print pass to print out xvcg format files for vis
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* I need to provide an option to the bytecode loader to ignore memory
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dependance edges. Instead, the VM would just treat memory operations
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(load, store, getfield, putfield, call) as pinned instructions.
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* I need to have a way to prevent taking the address of a constant pool
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reference. You should only be able to take the address of a variable.
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Maybe taking the address of a constant copies it? What about virtual
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function tables? Maybe a const pointer would be better...
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* Structures should be accessed something like this: ubyte is ok. Limits
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structure size to 256 members. This can be fixed later by either:
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1. adding varient that takes ushort
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2. Splitting structures into nested structures each of half size
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<float> %f = load *{int, {float}} Str, 1, 0
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store float %f, *{int, {float}} Str, 1, 0
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* I'm noticing me writing a lot of code that looks like this (dtor material here):
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ConstPool.dropAllReferences();
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ConstPool.delete_all();
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ConstPool.setParent(0);
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~ConstPool
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* Need a way to attach bytecode block info at various levels of asm code.
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* Rename "ConstantPool" to "ConstPool"
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* Maybe ConstantPool objects should keep themselves sorted as things are
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inserted.
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* Need to be able to inflate recursive types. %x = { *%x }, %x = %x ()
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* Recognize and save comments in assembly and bytecode format
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* Encode line number table in bytecode (like #line), optional table
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* Encode negative relative offsets in the bytecode file
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* Implement switch to switch on a constant pool array of type:
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[{ label, int }] or [label] (lookup vs index switch)
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* Apparently bison has a %pure_parser option. Maybe useful for Assembly/Parser
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* Implement a header file that can read either assembly or bytecode, implement
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a writer that can output either based on what is read with this reader..
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* Implement the following derived types:
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* structure/record { int %foo, int %bar} or { %foo = int, int }
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* pointer int *
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* "packed format", like this: [4 x sbyte]: Packed SIMD datatype
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* Maybe 'tailcall' also?
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* Include a method level bytecode block that defines a mapping between values
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and registers that defines a minimally register allocated code. This can
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make me finally address how to encode extensions in assembly.
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* Bytecode reader should use extensions that may or may not be linked into the
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application to read blocks. Thus an easy way to ignore symbol table info
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would be to not link in that reader into the app.
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