Updates:
Status: Invalid
Comment #1 on issue 3402 by [email protected]: Boolean symbols
http://code.google.com/p/v8/issues/detail?id=3402
We already constant-fold (and similar for !0):
--- Raw source ---
!1
--- Code ---
source_position = 0
kind = FUNCTION
Instructions (size = 104)
0x27a4c860 0 8b4c2404 mov ecx,[esp+0x4]
0x27a4c864 4 81f991808054 cmp ecx,0x54808091 ;; object:
0x54808091 <undefined>
0x27a4c86a 10 750a jnz 22 (0x27a4c876)
0x27a4c86c 12 8b4e13 mov ecx,[esi+0x13]
0x27a4c86f 15 8b4917 mov ecx,[ecx+0x17]
0x27a4c872 18 894c2404 mov [esp+0x4],ecx
0x27a4c876 22 55 push ebp
0x27a4c877 23 89e5 mov ebp,esp
0x27a4c879 25 56 push esi
0x27a4c87a 26 57 push edi
0x27a4c87b 27 6891808054 push 0x54808091 ;; object:
0x54808091 <undefined>
0x27a4c880 32 3b2594cb6a0a cmp esp,[0xa6acb94]
0x27a4c886 38 7305 jnc 45 (0x27a4c88d)
0x27a4c888 40 e8d3fafdff call StackCheck (0x27a2c360) ;; debug:
statement 0
;; code:
BUILTIN
0x27a4c88d 45 b8c1808054 mov eax,0x548080c1 ;; object:
0x548080c1 <false>
0x27a4c892 50 8945f4 mov [ebp-0xc],eax
0x27a4c895 53 8b45f4 mov eax,[ebp-0xc]
0x27a4c898 56 bb5185d039 mov ebx,0x39d08551 ;; object:
0x39d08551 Cell for 6144
0x27a4c89d 61 836b035e sub [ebx+0x3],0x5e
0x27a4c8a1 65 7913 jns 86 (0x27a4c8b6)
0x27a4c8a3 67 50 push eax
0x27a4c8a4 68 e837fcfdff call InterruptCheck (0x27a2c4e0) ;;
debug: statement 4
;; code:
BUILTIN
0x27a4c8a9 73 58 pop eax
0x27a4c8aa 74 bb5185d039 mov ebx,0x39d08551 ;; object:
0x39d08551 Cell for 6144
0x27a4c8af 79 c7430300300000 mov [ebx+0x3],0x3000
0x27a4c8b6 86 89ec mov esp,ebp ;; debug:
position 3
;; js return
0x27a4c8b8 88 5d pop ebp
0x27a4c8b9 89 c20400 ret 0x4
0x27a4c8bc 92 b891808054 mov eax,0x54808091 ;; object:
0x54808091 <undefined>
0x27a4c8c1 97 ebd5 jmp 56 (0x27a4c898)
0x27a4c8c3 99 90 nop
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