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avoid needless register save when storing structures

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When storing structs with a memcpy call in vstore(),
so far a needless entry remaining on the vstack
sometimes resulted in an useless store generated by
save_regs() in gfunc_call() for the memcpy routine.
This commit is contained in:
bobbl 2009-11-30 19:33:44 +01:00 committed by grischka
parent b573072300
commit c0620c8a00
1 changed files with 7 additions and 7 deletions
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14
tccgen.c
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@ -2019,6 +2019,12 @@ void vstore(void)
if (!nocode_wanted) { if (!nocode_wanted) {
size = type_size(&vtop->type, &align); size = type_size(&vtop->type, &align);
/* destination */
vswap();
vtop->type.t = VT_PTR;
gaddrof();
/* address of memcpy() */
#ifdef TCC_ARM_EABI #ifdef TCC_ARM_EABI
if(!(align & 7)) if(!(align & 7))
vpush_global_sym(&func_old_type, TOK_memcpy8); vpush_global_sym(&func_old_type, TOK_memcpy8);
@ -2028,10 +2034,7 @@ void vstore(void)
#endif #endif
vpush_global_sym(&func_old_type, TOK_memcpy); vpush_global_sym(&func_old_type, TOK_memcpy);
/* destination */ vswap();
vpushv(vtop - 2);
vtop->type.t = VT_PTR;
gaddrof();
/* source */ /* source */
vpushv(vtop - 2); vpushv(vtop - 2);
vtop->type.t = VT_PTR; vtop->type.t = VT_PTR;
@ -2039,9 +2042,6 @@ void vstore(void)
/* type size */ /* type size */
vpushi(size); vpushi(size);
gfunc_call(3); gfunc_call(3);
vswap();
vpop();
} else { } else {
vswap(); vswap();
vpop(); vpop();