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{
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  "tree": "d4aa59f11a6b6b9ba9c60e3ea54b7c9fe8ae8cee",
  "parents": [
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  "author": {
    "name": "Jim Stichnoth",
    "email": "stichnot@chromium.org",
    "time": "Thu May 22 13:38:48 2014 -0700"
  },
  "committer": {
    "name": "Jim Stichnoth",
    "email": "stichnot@chromium.org",
    "time": "Thu May 22 13:38:48 2014 -0700"
  },
  "message": "Add Om1 lowering with no optimizations.\n\nThis adds infrastructure for low-level x86-32 instructions, and the target lowering patterns.\n\nPractically no optimizations are performed.  Optimizations to be introduced later include liveness analysis, dead-code elimination, global linear-scan register allocation, linear-scan based stack slot coalescing, and compare/branch fusing.  One optimization that is present is simple coalescing of stack slots for variables that are only live within a single basic block.\n\nThere are also some fairly comprehensive cross tests.  This testing infrastructure translates bitcode using both Subzero and llc, and a testing harness calls both versions with a variety of \"interesting\" inputs and compares the results.  Specifically, Arithmetic, Icmp, Fcmp, and Cast instructions are tested this way, across all PNaCl primitive types.\n\nBUG\u003d\nR\u003djvoung@chromium.org\n\nReview URL: https://codereview.chromium.org/265703002\n",
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