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| author | Mike Pall <mike> | 2011-08-11 22:04:38 +0200 |
|---|---|---|
| committer | Mike Pall <mike> | 2011-08-11 22:04:38 +0200 |
| commit | 05ef03e2d04ccde3c881166268575308315a6ea0 (patch) | |
| tree | a3c2088217fadb18663422ba74a67e114a39037c /src/lj_opt_dce.c | |
| parent | e8fa76feace720c8348f08fd0e0c9f0656277987 (diff) | |
| download | luajit-05ef03e2d04ccde3c881166268575308315a6ea0.tar.gz luajit-05ef03e2d04ccde3c881166268575308315a6ea0.tar.bz2 luajit-05ef03e2d04ccde3c881166268575308315a6ea0.zip | |
Don't bother to chain NOPs.
Diffstat (limited to 'src/lj_opt_dce.c')
| -rw-r--r-- | src/lj_opt_dce.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/src/lj_opt_dce.c b/src/lj_opt_dce.c index 253fe3d2..0587262d 100644 --- a/src/lj_opt_dce.c +++ b/src/lj_opt_dce.c | |||
| @@ -47,17 +47,15 @@ static void dce_propagate(jit_State *J) | |||
| 47 | pchain[ir->o] = &ir->prev; | 47 | pchain[ir->o] = &ir->prev; |
| 48 | } else if (!ir_sideeff(ir)) { | 48 | } else if (!ir_sideeff(ir)) { |
| 49 | *pchain[ir->o] = ir->prev; /* Reroute original instruction chain. */ | 49 | *pchain[ir->o] = ir->prev; /* Reroute original instruction chain. */ |
| 50 | *pchain[IR_NOP] = (IRRef1)ins; | ||
| 51 | ir->t.irt = IRT_NIL; | 50 | ir->t.irt = IRT_NIL; |
| 52 | ir->o = IR_NOP; /* Replace instruction with NOP. */ | 51 | ir->o = IR_NOP; /* Replace instruction with NOP. */ |
| 53 | ir->op1 = ir->op2 = 0; | 52 | ir->op1 = ir->op2 = 0; |
| 54 | pchain[IR_NOP] = &ir->prev; | 53 | ir->prev = 0; |
| 55 | continue; | 54 | continue; |
| 56 | } | 55 | } |
| 57 | if (ir->op1 >= REF_FIRST) irt_setmark(IR(ir->op1)->t); | 56 | if (ir->op1 >= REF_FIRST) irt_setmark(IR(ir->op1)->t); |
| 58 | if (ir->op2 >= REF_FIRST) irt_setmark(IR(ir->op2)->t); | 57 | if (ir->op2 >= REF_FIRST) irt_setmark(IR(ir->op2)->t); |
| 59 | } | 58 | } |
| 60 | *pchain[IR_NOP] = 0; /* Terminate NOP chain. */ | ||
| 61 | } | 59 | } |
| 62 | 60 | ||
| 63 | /* Dead Code Elimination. | 61 | /* Dead Code Elimination. |