)]}'
{
  "commit": "5bff61c44841990680781892036adb17b3cff0c4",
  "tree": "bb351f5c16193d6c8641f35f2d931839842086ef",
  "parents": [
    "562233c890ea6d2a834962edf3ccf9db14356683"
  ],
  "author": {
    "name": "Jim Stichnoth",
    "email": "stichnot@chromium.org",
    "time": "Wed Oct 28 09:26:00 2015 -0700"
  },
  "committer": {
    "name": "Jim Stichnoth",
    "email": "stichnot@chromium.org",
    "time": "Wed Oct 28 09:26:00 2015 -0700"
  },
  "message": "Sets the stage for enabling the use of the 8-bit high registers, but doesn\u0027t yet turn it on because more work is needed for correctness.\n\nIn the lowering, typing is tightened up so that we don\u0027t specify e.g. eax when we really mean ax or al.  This gets rid of the ShiftHack hack.  The one exception is the pinsr instruction which always requires an r32 register even if the memory operand is m8 or m16.\n\nThe x86 assembler unit tests are fixed, by not passing a GlobalContext arg to the Assembler ctor.\n\nMany constexpr and \"auto *\" upgrades are applied.  Sorry for not putting this into a separate CL - a few local fixes got out of hand...\n\nTested in the following ways:\n- \"make check-lit\" - some .ll CHECK line changes due to register randomization\n- \"make check-xtest\"\n- \"make check-xtest\" with forced filetype\u003dasm (via local .py hack)\n- spec2k with all -filetype options\n- compare before-and-after spec2k filetype\u003dasm output - a few differences where the correct narrow register is used instead of the full-width register\n\nTo do in the next CL:\n\n1. Add new register classes:\n  (a) 32-bit GPR truncable to 8-bit (eax, ecx, edx, ebx)\n  (b) 16-bit GPR truncable to 8-bit (ax, cx, dx, bx)\n  (c) 8-bit truncable from 16/32-bit (al, bl, cl, dl)\n  (c) 8-bit \"mov\"able from ah/bh/ch/dh\n\n2. Enable use of ah/bh/ch/dh for x86-32.\n\n3. Enable use of ah (but skip bh/ch/dh) for x86-64.\n\n4. Statically initialize register tables in the TargetLowering subclass.\n\nBUG\u003d none\nR\u003djpp@chromium.org, kschimpf@google.com\n\nReview URL: https://codereview.chromium.org/1419903002 .\n",
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