[Pcre-svn] [1014] code/trunk/pcre_jit_compile.c: Optimize re…

Revision: 1014

          http://vcs.pcre.org/viewvc?view=rev&revision=1014
Author:   zherczeg
Date:     2012-08-26 05:53:49 +0100 (Sun, 26 Aug 2012)

Log Message:
-----------
Optimize register allocation of \X in JIT.

Modified Paths:
--------------
    code/trunk/pcre_jit_compile.c

Modified: code/trunk/pcre_jit_compile.c
===================================================================
--- code/trunk/pcre_jit_compile.c    2012-08-25 16:50:00 UTC (rev 1013)
+++ code/trunk/pcre_jit_compile.c    2012-08-26 04:53:49 UTC (rev 1014)
@@ -4220,24 +4220,28 @@
   read_char(common);
   add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
   OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, gbprop));
-  OP1(SLJIT_MOV_UB, TMP3, 0, SLJIT_MEM2(TMP1, TMP2), 3);
+  /* Optimize register allocation: use a real register. */
+  OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, STACK_TOP, 0);
+  OP1(SLJIT_MOV_UB, STACK_TOP, 0, SLJIT_MEM2(TMP1, TMP2), 3);

label = LABEL();
jump[0] = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
- OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, STR_PTR, 0);
+ OP1(SLJIT_MOV, TMP3, 0, STR_PTR, 0);
read_char(common);
add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, gbprop));
OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM2(TMP1, TMP2), 3);

- OP2(SLJIT_MUL, TMP1, 0, TMP3, 0, SLJIT_IMM, ucp_gbCount);
- OP1(SLJIT_MOV, TMP3, 0, TMP2, 0);
+ OP2(SLJIT_MUL, TMP1, 0, STACK_TOP, 0, SLJIT_IMM, ucp_gbCount);
+ OP1(SLJIT_MOV, STACK_TOP, 0, TMP2, 0);
OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, TMP2, 0);
OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)PRIV(ucp_gbtable));
CMPTO(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, 0, label);

-  OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
+  OP1(SLJIT_MOV, STR_PTR, 0, TMP3, 0);
   JUMPHERE(jump[0]);
+  OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
+
   if (common->mode == JIT_PARTIAL_HARD_COMPILE)
     {
     jump[0] = CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0);