IntelLabs / ParallelAccelerator.jl / 964 / 2
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PROSPECT_DEV_MODE=1 TEST_SUITE=pa-examples

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DrTodd13 
Adding some support to recreate loop structures and if statements in the generated C code and thus usuaully eliminating most gotos and labels in the generated code.
This is turned off by default for now.  To enable, call setRecreateLoops(true) and setRecreateConds(true).
In support of this, the following was done:
  1) Added information to the global lstate to record which blocks are heads, back edges and exit blocks of loop.
  2) Added information to the global lstate to record "if"/conditional follow nodes and the block targets of conditionals.
  3) Added getLoopInfo to locate all loop block information and conditional block information and fill out lstate fields.
  4) For conditional follow nodes, used the smallest (in basic block function order) basic block that inverse dominates the conditional block.
  5) For labelnodes, generate nothing for loop exit nodes and generate "while (1) {" for loop head labels.
     For label in conditional follow set, generate an ending curly brace based on how many conditionals terminate at that follownode.
     For blocks that are conditional jump targets, generate nothing.
  6) For goto nodes, if the goto is to a loop head, generate an ending curly brace for the loop.
     For jumps to a follow node, generate "} else {".
  7) For gotoifnot nodes, if goto label is in loop exit set, create "if (condition) break" to exit the while(1) loop.
     If goto label is in conditional jump targets, generate "if (condition) {"

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Source Files on job 964.2 (PROSPECT_DEV_MODE=1 TEST_SUITE=pa-examples)