From 831e814ce9bdb84e86c06c4a52008f6bdaaa00d6 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Fri, 16 Nov 2018 00:24:51 +0800
Subject: =?UTF-8?q?*=E5=90=88=E5=B9=B6master=E5=88=B0minimal=E5=88=86?=
 =?UTF-8?q?=E6=94=AF?=
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---
 build/vc++/libs/LuaJIT-2.0.5/src/lj_opt_dce.c | 78 ---------------------------
 1 file changed, 78 deletions(-)
 delete mode 100644 build/vc++/libs/LuaJIT-2.0.5/src/lj_opt_dce.c

(limited to 'build/vc++/libs/LuaJIT-2.0.5/src/lj_opt_dce.c')

diff --git a/build/vc++/libs/LuaJIT-2.0.5/src/lj_opt_dce.c b/build/vc++/libs/LuaJIT-2.0.5/src/lj_opt_dce.c
deleted file mode 100644
index 2417f32..0000000
--- a/build/vc++/libs/LuaJIT-2.0.5/src/lj_opt_dce.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
-** DCE: Dead Code Elimination. Pre-LOOP only -- ASM already performs DCE.
-** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
-*/
-
-#define lj_opt_dce_c
-#define LUA_CORE
-
-#include "lj_obj.h"
-
-#if LJ_HASJIT
-
-#include "lj_ir.h"
-#include "lj_jit.h"
-#include "lj_iropt.h"
-
-/* Some local macros to save typing. Undef'd at the end. */
-#define IR(ref)		(&J->cur.ir[(ref)])
-
-/* Scan through all snapshots and mark all referenced instructions. */
-static void dce_marksnap(jit_State *J)
-{
-  SnapNo i, nsnap = J->cur.nsnap;
-  for (i = 0; i < nsnap; i++) {
-    SnapShot *snap = &J->cur.snap[i];
-    SnapEntry *map = &J->cur.snapmap[snap->mapofs];
-    MSize n, nent = snap->nent;
-    for (n = 0; n < nent; n++) {
-      IRRef ref = snap_ref(map[n]);
-      if (ref >= REF_FIRST)
-	irt_setmark(IR(ref)->t);
-    }
-  }
-}
-
-/* Backwards propagate marks. Replace unused instructions with NOPs. */
-static void dce_propagate(jit_State *J)
-{
-  IRRef1 *pchain[IR__MAX];
-  IRRef ins;
-  uint32_t i;
-  for (i = 0; i < IR__MAX; i++) pchain[i] = &J->chain[i];
-  for (ins = J->cur.nins-1; ins >= REF_FIRST; ins--) {
-    IRIns *ir = IR(ins);
-    if (irt_ismarked(ir->t)) {
-      irt_clearmark(ir->t);
-      pchain[ir->o] = &ir->prev;
-    } else if (!ir_sideeff(ir)) {
-      *pchain[ir->o] = ir->prev;  /* Reroute original instruction chain. */
-      ir->t.irt = IRT_NIL;
-      ir->o = IR_NOP;  /* Replace instruction with NOP. */
-      ir->op1 = ir->op2 = 0;
-      ir->prev = 0;
-      continue;
-    }
-    if (ir->op1 >= REF_FIRST) irt_setmark(IR(ir->op1)->t);
-    if (ir->op2 >= REF_FIRST) irt_setmark(IR(ir->op2)->t);
-  }
-}
-
-/* Dead Code Elimination.
-**
-** First backpropagate marks for all used instructions. Then replace
-** the unused ones with a NOP. Note that compressing the IR to eliminate
-** the NOPs does not pay off.
-*/
-void lj_opt_dce(jit_State *J)
-{
-  if ((J->flags & JIT_F_OPT_DCE)) {
-    dce_marksnap(J);
-    dce_propagate(J);
-    memset(J->bpropcache, 0, sizeof(J->bpropcache));  /* Invalidate cache. */
-  }
-}
-
-#undef IR
-
-#endif
-- 
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