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annotate third_party/luajit/src/lj_opt_loop.c @ 196:83f16548ba41

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[AI] Adding s3 bucket uploader code using Seobeo.
author MrJuneJune <me@mrjunejune.com>
date Sat, 14 Feb 2026 16:08:15 -0800
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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126 /* Pass #2: traverse variant part and clear marks of non-redundant PHIs. */
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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.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
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;
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389 map[snap->mapofs + snap->nent] = map[J->cur.snap[0].nent]; /* Restore PC. */
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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. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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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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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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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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422 lps.J = J;
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423 lps.subst = NULL;
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424 lps.sizesubst = 0;
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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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427 if (LJ_UNLIKELY(errcode)) {
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428 lua_State *L = J->L;
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429 if (errcode == LUA_ERRRUN && tvisnumber(L->top-1)) { /* Trace error? */
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430 int32_t e = numberVint(L->top-1);
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431 switch ((TraceError)e) {
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432 case LJ_TRERR_TYPEINS: /* Type instability. */
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433 case LJ_TRERR_GFAIL: /* Guard would always fail. */
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434 /* Unrolling via recording fixes many cases, e.g. a flipped boolean. */
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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>
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437 L->top--; /* Remove error object. */
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MrJuneJune <me@mrjunejune.com>
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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:
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441 break;
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diff changeset
442 }
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diff changeset
443 }
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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:
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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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450 #undef emitir
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451 #undef emitir_raw
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452
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453 #endif