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annotate third_party/luajit/src/lj_opt_loop.c @ 279:b3b547563ec7

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Add Google connector service and agent wiki Implement the C/Seobeo Google Drive and Gmail connector with encrypted OAuth storage, Zenbu authentication, browser testing, AI tool discovery, chunked HTTP decoding, and Bazel coverage. Consolidate repository guidance into progressive wiki documentation and enforce arena-first allocation for new first-party C code. Co-authored-by: Copilot <[email protected]> Copilot-Session: 84c338fd-0939-4bb3-b7f3-1062eb213e5d
author MrJuneJune <me@mrjunejune.com>
date Mon, 17 Aug 2026 22:22:36 -0700
parents 94705b5986b3
children
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178
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1 /*
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2 ** LOOP: Loop Optimizations.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 */
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5
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6 #define lj_opt_loop_c
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7 #define LUA_CORE
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8
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9 #include "lj_obj.h"
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10
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11 #if LJ_HASJIT
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12
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13 #include "lj_err.h"
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14 #include "lj_buf.h"
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15 #include "lj_ir.h"
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16 #include "lj_jit.h"
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17 #include "lj_iropt.h"
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18 #include "lj_trace.h"
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19 #include "lj_snap.h"
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20 #include "lj_vm.h"
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21
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22 /* Loop optimization:
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23 **
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24 ** Traditional Loop-Invariant Code Motion (LICM) splits the instructions
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25 ** of a loop into invariant and variant instructions. The invariant
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26 ** instructions are hoisted out of the loop and only the variant
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27 ** instructions remain inside the loop body.
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28 **
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29 ** Unfortunately LICM is mostly useless for compiling dynamic languages.
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30 ** The IR has many guards and most of the subsequent instructions are
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31 ** control-dependent on them. The first non-hoistable guard would
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32 ** effectively prevent hoisting of all subsequent instructions.
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33 **
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34 ** That's why we use a special form of unrolling using copy-substitution,
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35 ** combined with redundancy elimination:
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36 **
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37 ** The recorded instruction stream is re-emitted to the compiler pipeline
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38 ** with substituted operands. The substitution table is filled with the
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39 ** refs returned by re-emitting each instruction. This can be done
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40 ** on-the-fly, because the IR is in strict SSA form, where every ref is
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41 ** defined before its use.
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42 **
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43 ** This aproach generates two code sections, separated by the LOOP
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44 ** instruction:
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45 **
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46 ** 1. The recorded instructions form a kind of pre-roll for the loop. It
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47 ** contains a mix of invariant and variant instructions and performs
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48 ** exactly one loop iteration (but not necessarily the 1st iteration).
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49 **
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50 ** 2. The loop body contains only the variant instructions and performs
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51 ** all remaining loop iterations.
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52 **
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53 ** On first sight that looks like a waste of space, because the variant
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54 ** instructions are present twice. But the key insight is that the
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55 ** pre-roll honors the control-dependencies for *both* the pre-roll itself
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56 ** *and* the loop body!
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57 **
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58 ** It also means one doesn't have to explicitly model control-dependencies
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59 ** (which, BTW, wouldn't help LICM much). And it's much easier to
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60 ** integrate sparse snapshotting with this approach.
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61 **
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62 ** One of the nicest aspects of this approach is that all of the
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63 ** optimizations of the compiler pipeline (FOLD, CSE, FWD, etc.) can be
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64 ** reused with only minor restrictions (e.g. one should not fold
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65 ** instructions across loop-carried dependencies).
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66 **
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67 ** But in general all optimizations can be applied which only need to look
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68 ** backwards into the generated instruction stream. At any point in time
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69 ** during the copy-substitution process this contains both a static loop
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70 ** iteration (the pre-roll) and a dynamic one (from the to-be-copied
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71 ** instruction up to the end of the partial loop body).
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72 **
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73 ** Since control-dependencies are implicitly kept, CSE also applies to all
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74 ** kinds of guards. The major advantage is that all invariant guards can
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75 ** be hoisted, too.
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76 **
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77 ** Load/store forwarding works across loop iterations, too. This is
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78 ** important if loop-carried dependencies are kept in upvalues or tables.
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79 ** E.g. 'self.idx = self.idx + 1' deep down in some OO-style method may
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80 ** become a forwarded loop-recurrence after inlining.
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81 **
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82 ** Since the IR is in SSA form, loop-carried dependencies have to be
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83 ** modeled with PHI instructions. The potential candidates for PHIs are
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84 ** collected on-the-fly during copy-substitution. After eliminating the
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85 ** redundant ones, PHI instructions are emitted *below* the loop body.
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86 **
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87 ** Note that this departure from traditional SSA form doesn't change the
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88 ** semantics of the PHI instructions themselves. But it greatly simplifies
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89 ** on-the-fly generation of the IR and the machine code.
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90 */
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91
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92 /* Some local macros to save typing. Undef'd at the end. */
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93 #define IR(ref) (&J->cur.ir[(ref)])
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94
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95 /* Pass IR on to next optimization in chain (FOLD). */
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96 #define emitir(ot, a, b) (lj_ir_set(J, (ot), (a), (b)), lj_opt_fold(J))
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97
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98 /* Emit raw IR without passing through optimizations. */
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99 #define emitir_raw(ot, a, b) (lj_ir_set(J, (ot), (a), (b)), lj_ir_emit(J))
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100
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101 /* -- PHI elimination ----------------------------------------------------- */
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102
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103 /* Emit or eliminate collected PHIs. */
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104 static void loop_emit_phi(jit_State *J, IRRef1 *subst, IRRef1 *phi, IRRef nphi,
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105 SnapNo onsnap)
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106 {
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107 int passx = 0;
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108 IRRef i, j, nslots;
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109 IRRef invar = J->chain[IR_LOOP];
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110 /* Pass #1: mark redundant and potentially redundant PHIs. */
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111 for (i = 0, j = 0; i < nphi; i++) {
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112 IRRef lref = phi[i];
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113 IRRef rref = subst[lref];
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114 if (lref == rref || rref == REF_DROP) { /* Invariants are redundant. */
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115 irt_clearphi(IR(lref)->t);
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116 } else {
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117 phi[j++] = (IRRef1)lref;
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118 if (!(IR(rref)->op1 == lref || IR(rref)->op2 == lref)) {
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119 /* Quick check for simple recurrences failed, need pass2. */
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120 irt_setmark(IR(lref)->t);
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121 passx = 1;
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122 }
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123 }
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124 }
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125 nphi = j;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
126 /* Pass #2: traverse variant part and clear marks of non-redundant PHIs. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
127 if (passx) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
128 SnapNo s;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
129 for (i = J->cur.nins-1; i > invar; i--) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
130 IRIns *ir = IR(i);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
131 if (!irref_isk(ir->op2)) irt_clearmark(IR(ir->op2)->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
132 if (!irref_isk(ir->op1)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
133 irt_clearmark(IR(ir->op1)->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
134 if (ir->op1 < invar &&
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
135 ir->o >= IR_CALLN && ir->o <= IR_CARG) { /* ORDER IR */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
136 ir = IR(ir->op1);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
137 while (ir->o == IR_CARG) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
138 if (!irref_isk(ir->op2)) irt_clearmark(IR(ir->op2)->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
139 if (irref_isk(ir->op1)) break;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
140 ir = IR(ir->op1);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
141 irt_clearmark(ir->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
142 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
143 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
144 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
145 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
146 for (s = J->cur.nsnap-1; s >= onsnap; s--) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
147 SnapShot *snap = &J->cur.snap[s];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
148 SnapEntry *map = &J->cur.snapmap[snap->mapofs];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
149 MSize n, nent = snap->nent;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
150 for (n = 0; n < nent; n++) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
151 IRRef ref = snap_ref(map[n]);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
152 if (!irref_isk(ref)) irt_clearmark(IR(ref)->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
153 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
154 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
155 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
156 /* Pass #3: add PHIs for variant slots without a corresponding SLOAD. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
157 nslots = J->baseslot+J->maxslot;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
158 for (i = 1; i < nslots; i++) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
159 IRRef ref = tref_ref(J->slot[i]);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
160 while (!irref_isk(ref) && ref != subst[ref]) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
161 IRIns *ir = IR(ref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
162 irt_clearmark(ir->t); /* Unmark potential uses, too. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
163 if (irt_isphi(ir->t) || irt_ispri(ir->t))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
164 break;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
165 irt_setphi(ir->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
166 if (nphi >= LJ_MAX_PHI)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
167 lj_trace_err(J, LJ_TRERR_PHIOV);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
168 phi[nphi++] = (IRRef1)ref;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
169 ref = subst[ref];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
170 if (ref > invar)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
171 break;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
172 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
173 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
174 /* Pass #4: propagate non-redundant PHIs. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
175 while (passx) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
176 passx = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
177 for (i = 0; i < nphi; i++) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
178 IRRef lref = phi[i];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
179 IRIns *ir = IR(lref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
180 if (!irt_ismarked(ir->t)) { /* Propagate only from unmarked PHIs. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
181 IRIns *irr = IR(subst[lref]);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
182 if (irt_ismarked(irr->t)) { /* Right ref points to other PHI? */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
183 irt_clearmark(irr->t); /* Mark that PHI as non-redundant. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
184 passx = 1; /* Retry. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
185 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
186 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
187 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
188 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
189 /* Pass #5: emit PHI instructions or eliminate PHIs. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
190 for (i = 0; i < nphi; i++) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
191 IRRef lref = phi[i];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
192 IRIns *ir = IR(lref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
193 if (!irt_ismarked(ir->t)) { /* Emit PHI if not marked. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
194 IRRef rref = subst[lref];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
195 if (rref > invar)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
196 irt_setphi(IR(rref)->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
197 emitir_raw(IRT(IR_PHI, irt_type(ir->t)), lref, rref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
198 } else { /* Otherwise eliminate PHI. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
199 irt_clearmark(ir->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
200 irt_clearphi(ir->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
201 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
202 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
203 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
204
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
205 /* -- Loop unrolling using copy-substitution ------------------------------ */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
206
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
207 /* Copy-substitute snapshot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
208 static void loop_subst_snap(jit_State *J, SnapShot *osnap,
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
209 SnapEntry *loopmap, IRRef1 *subst)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
210 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
211 SnapEntry *nmap, *omap = &J->cur.snapmap[osnap->mapofs];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
212 SnapEntry *nextmap = &J->cur.snapmap[snap_nextofs(&J->cur, osnap)];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
213 MSize nmapofs;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 MSize on, ln, nn, onent = osnap->nent;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
215 BCReg nslots = osnap->nslots;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
216 SnapShot *snap = &J->cur.snap[J->cur.nsnap];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
217 if (irt_isguard(J->guardemit)) { /* Guard inbetween? */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
218 nmapofs = J->cur.nsnapmap;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
219 J->cur.nsnap++; /* Add new snapshot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
220 } else { /* Otherwise overwrite previous snapshot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
221 snap--;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 nmapofs = snap->mapofs;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 J->guardemit.irt = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
225 /* Setup new snapshot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
226 snap->mapofs = (uint32_t)nmapofs;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
227 snap->ref = (IRRef1)J->cur.nins;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
228 snap->mcofs = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
229 snap->nslots = nslots;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
230 snap->topslot = osnap->topslot;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
231 snap->count = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
232 nmap = &J->cur.snapmap[nmapofs];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
233 /* Substitute snapshot slots. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
234 on = ln = nn = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
235 while (on < onent) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
236 SnapEntry osn = omap[on], lsn = loopmap[ln];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
237 if (snap_slot(lsn) < snap_slot(osn)) { /* Copy slot from loop map. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
238 nmap[nn++] = lsn;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
239 ln++;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
240 } else { /* Copy substituted slot from snapshot map. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
241 if (snap_slot(lsn) == snap_slot(osn)) ln++; /* Shadowed loop slot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
242 if (!irref_isk(snap_ref(osn)))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
243 osn = snap_setref(osn, subst[snap_ref(osn)]);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
244 nmap[nn++] = osn;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
245 on++;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
246 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
247 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
248 while (snap_slot(loopmap[ln]) < nslots) /* Copy remaining loop slots. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
249 nmap[nn++] = loopmap[ln++];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
250 snap->nent = (uint8_t)nn;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
251 omap += onent;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
252 nmap += nn;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
253 while (omap < nextmap) /* Copy PC + frame links. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
254 *nmap++ = *omap++;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
255 J->cur.nsnapmap = (uint32_t)(nmap - J->cur.snapmap);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
256 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
257
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
258 typedef struct LoopState {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
259 jit_State *J;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
260 IRRef1 *subst;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
261 MSize sizesubst;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
262 } LoopState;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
263
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
264 /* Unroll loop. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
265 static void loop_unroll(LoopState *lps)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
266 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
267 jit_State *J = lps->J;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
268 IRRef1 phi[LJ_MAX_PHI];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
269 uint32_t nphi = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
270 IRRef1 *subst;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
271 SnapNo onsnap;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
272 SnapShot *osnap, *loopsnap;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
273 SnapEntry *loopmap, *psentinel;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
274 IRRef ins, invar;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
275
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
276 /* Allocate substitution table.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
277 ** Only non-constant refs in [REF_BIAS,invar) are valid indexes.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
278 */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
279 invar = J->cur.nins;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
280 lps->sizesubst = invar - REF_BIAS;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
281 lps->subst = lj_mem_newvec(J->L, lps->sizesubst, IRRef1);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
282 subst = lps->subst - REF_BIAS;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
283 subst[REF_BASE] = REF_BASE;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
284
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
285 /* LOOP separates the pre-roll from the loop body. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
286 emitir_raw(IRTG(IR_LOOP, IRT_NIL), 0, 0);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
287
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
288 /* Grow snapshot buffer and map for copy-substituted snapshots.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
289 ** Need up to twice the number of snapshots minus #0 and loop snapshot.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
290 ** Need up to twice the number of entries plus fallback substitutions
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
291 ** from the loop snapshot entries for each new snapshot.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
292 ** Caveat: both calls may reallocate J->cur.snap and J->cur.snapmap!
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
293 */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
294 onsnap = J->cur.nsnap;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
295 lj_snap_grow_buf(J, 2*onsnap-2);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
296 lj_snap_grow_map(J, J->cur.nsnapmap*2+(onsnap-2)*J->cur.snap[onsnap-1].nent);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
297
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
298 /* The loop snapshot is used for fallback substitutions. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
299 loopsnap = &J->cur.snap[onsnap-1];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
300 loopmap = &J->cur.snapmap[loopsnap->mapofs];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
301 /* The PC of snapshot #0 and the loop snapshot must match. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
302 psentinel = &loopmap[loopsnap->nent];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
303 lj_assertJ(*psentinel == J->cur.snapmap[J->cur.snap[0].nent],
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
304 "mismatched PC for loop snapshot");
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
305 *psentinel = SNAP(255, 0, 0); /* Replace PC with temporary sentinel. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
306
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
307 /* Start substitution with snapshot #1 (#0 is empty for root traces). */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
308 osnap = &J->cur.snap[1];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
309
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
310 /* Copy and substitute all recorded instructions and snapshots. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
311 for (ins = REF_FIRST; ins < invar; ins++) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
312 IRIns *ir;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
313 IRRef op1, op2;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
314
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
315 if (ins >= osnap->ref) /* Instruction belongs to next snapshot? */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
316 loop_subst_snap(J, osnap++, loopmap, subst); /* Copy-substitute it. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
317
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
318 /* Substitute instruction operands. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
319 ir = IR(ins);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
320 op1 = ir->op1;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
321 if (!irref_isk(op1)) op1 = subst[op1];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
322 op2 = ir->op2;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
323 if (!irref_isk(op2)) op2 = subst[op2];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
324 if (irm_kind(lj_ir_mode[ir->o]) == IRM_N &&
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
325 op1 == ir->op1 && op2 == ir->op2) { /* Regular invariant ins? */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
326 subst[ins] = (IRRef1)ins; /* Shortcut. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
327 } else {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
328 /* Re-emit substituted instruction to the FOLD/CSE/etc. pipeline. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
329 IRType1 t = ir->t; /* Get this first, since emitir may invalidate ir. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
330 IRRef ref = tref_ref(emitir(ir->ot & ~IRT_ISPHI, op1, op2));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
331 subst[ins] = (IRRef1)ref;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
332 if (ref != ins) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
333 IRIns *irr = IR(ref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
334 if (ref < invar) { /* Loop-carried dependency? */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
335 /* Potential PHI? */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
336 if (!irref_isk(ref) && !irt_isphi(irr->t) && !irt_ispri(irr->t)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
337 irt_setphi(irr->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
338 if (nphi >= LJ_MAX_PHI)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
339 lj_trace_err(J, LJ_TRERR_PHIOV);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
340 phi[nphi++] = (IRRef1)ref;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
341 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
342 /* Check all loop-carried dependencies for type instability. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
343 if (!irt_sametype(t, irr->t)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
344 if (irt_isinteger(t) && irt_isinteger(irr->t))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
345 continue;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
346 else if (irt_isnum(t) && irt_isinteger(irr->t)) /* Fix int->num. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
347 ref = tref_ref(emitir(IRTN(IR_CONV), ref, IRCONV_NUM_INT));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
348 else if (irt_isnum(irr->t) && irt_isinteger(t)) /* Fix num->int. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
349 ref = tref_ref(emitir(IRTGI(IR_CONV), ref,
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
350 IRCONV_INT_NUM|IRCONV_CHECK));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
351 else
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
352 lj_trace_err(J, LJ_TRERR_TYPEINS);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
353 subst[ins] = (IRRef1)ref;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
354 irr = IR(ref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
355 goto phiconv;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
356 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
357 } else if (ref != REF_DROP && ref > invar &&
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
358 ((irr->o == IR_CONV && irr->op1 < invar) ||
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
359 (irr->o == IR_ALEN && irr->op2 < invar &&
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
360 irr->op2 != REF_NIL))) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
361 /* May need an extra PHI for a CONV or ALEN hint. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
362 ref = irr->o == IR_CONV ? irr->op1 : irr->op2;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
363 irr = IR(ref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
364 phiconv:
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
365 if (ref < invar && !irref_isk(ref) && !irt_isphi(irr->t)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
366 irt_setphi(irr->t);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
367 if (nphi >= LJ_MAX_PHI)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
368 lj_trace_err(J, LJ_TRERR_PHIOV);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
369 phi[nphi++] = (IRRef1)ref;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
370 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
371 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
372 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
373 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
374 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
375 if (!irt_isguard(J->guardemit)) /* Drop redundant snapshot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
376 J->cur.nsnapmap = (uint32_t)J->cur.snap[--J->cur.nsnap].mapofs;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
377 lj_assertJ(J->cur.nsnapmap <= J->sizesnapmap, "bad snapshot map index");
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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378 *psentinel = J->cur.snapmap[J->cur.snap[0].nent]; /* Restore PC. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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379
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380 loop_emit_phi(J, subst, phi, nphi, onsnap);
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381 }
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382
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383 /* Undo any partial changes made by the loop optimization. */
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384 static void loop_undo(jit_State *J, IRRef ins, SnapNo nsnap, MSize nsnapmap)
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385 {
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386 ptrdiff_t i;
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387 SnapShot *snap = &J->cur.snap[nsnap-1];
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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388 SnapEntry *map = J->cur.snapmap;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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389 map[snap->mapofs + snap->nent] = map[J->cur.snap[0].nent]; /* Restore PC. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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390 J->cur.nsnapmap = (uint32_t)nsnapmap;
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391 J->cur.nsnap = nsnap;
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392 J->guardemit.irt = 0;
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393 lj_ir_rollback(J, ins);
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394 for (i = 0; i < BPROP_SLOTS; i++) { /* Remove backprop. cache entries. */
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395 BPropEntry *bp = &J->bpropcache[i];
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396 if (bp->val >= ins)
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397 bp->key = 0;
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398 }
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399 for (ins--; ins >= REF_FIRST; ins--) { /* Remove flags. */
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400 IRIns *ir = IR(ins);
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401 irt_clearphi(ir->t);
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MrJuneJune <me@mrjunejune.com>
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402 irt_clearmark(ir->t);
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403 }
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404 }
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405
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diff changeset
406 /* Protected callback for loop optimization. */
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407 static TValue *cploop_opt(lua_State *L, lua_CFunction dummy, void *ud)
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408 {
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409 UNUSED(L); UNUSED(dummy);
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410 loop_unroll((LoopState *)ud);
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411 return NULL;
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412 }
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413
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414 /* Loop optimization. */
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diff changeset
415 int lj_opt_loop(jit_State *J)
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416 {
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417 IRRef nins = J->cur.nins;
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418 SnapNo nsnap = J->cur.nsnap;
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419 MSize nsnapmap = J->cur.nsnapmap;
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420 LoopState lps;
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421 int errcode;
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diff changeset
422 lps.J = J;
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423 lps.subst = NULL;
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424 lps.sizesubst = 0;
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diff changeset
425 errcode = lj_vm_cpcall(J->L, NULL, &lps, cploop_opt);
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426 lj_mem_freevec(J2G(J), lps.subst, lps.sizesubst, IRRef1);
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diff changeset
427 if (LJ_UNLIKELY(errcode)) {
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diff changeset
428 lua_State *L = J->L;
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diff changeset
429 if (errcode == LUA_ERRRUN && tvisnumber(L->top-1)) { /* Trace error? */
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diff changeset
430 int32_t e = numberVint(L->top-1);
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diff changeset
431 switch ((TraceError)e) {
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diff changeset
432 case LJ_TRERR_TYPEINS: /* Type instability. */
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diff changeset
433 case LJ_TRERR_GFAIL: /* Guard would always fail. */
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diff changeset
434 /* Unrolling via recording fixes many cases, e.g. a flipped boolean. */
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
435 if (--J->instunroll < 0) /* But do not unroll forever. */
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MrJuneJune <me@mrjunejune.com>
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diff changeset
436 break;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
437 L->top--; /* Remove error object. */
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MrJuneJune <me@mrjunejune.com>
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diff changeset
438 loop_undo(J, nins, nsnap, nsnapmap);
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diff changeset
439 return 1; /* Loop optimization failed, continue recording. */
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MrJuneJune <me@mrjunejune.com>
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diff changeset
440 default:
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
441 break;
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MrJuneJune <me@mrjunejune.com>
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diff changeset
442 }
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diff changeset
443 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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444 lj_err_throw(L, errcode); /* Propagate all other errors. */
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diff changeset
445 }
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parents:
diff changeset
446 return 0; /* Loop optimization is ok. */
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parents:
diff changeset
447 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
448
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
449 #undef IR
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MrJuneJune <me@mrjunejune.com>
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diff changeset
450 #undef emitir
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diff changeset
451 #undef emitir_raw
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452
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453 #endif