Created
May 30, 2015 14:02
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Strange deopt.
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| [deoptimize global object @ 0x30ea29d106e9] | |
| --- FUNCTION SOURCE (optCompare) id{0,0} --- | |
| (a, b) { | |
| return a['foo'] === b['foo'] | |
| } | |
| --- END --- | |
| --- FUNCTION SOURCE (deoptCompare) id{1,0} --- | |
| (a, b) { | |
| var prop = 'foo' | |
| return a[prop] === b[prop] | |
| } | |
| --- END --- | |
| [deoptimizing (DEOPT eager): begin 0x1c1b6309f759 deoptCompare (opt #1) @9, FP to SP delta: 16] | |
| Deferred TaggedToI: NaN | |
| translating deoptCompare => node=3, height=8 | |
| 0x7fff5fbff228: [top + 56] <- 0x30ea29d04121 ; [sp + 48] 0x30ea29d04121 <undefined> | |
| 0x7fff5fbff220: [top + 48] <- 0x1c1b6309f849 ; rax 0x1c1b6309f849 <an Object with map 0x2c0d3604f59> | |
| 0x7fff5fbff218: [top + 40] <- 0x1c1b6309f8c9 ; [sp + 32] 0x1c1b6309f8c9 <an Object with map 0x2c0d3604f59> | |
| 0x7fff5fbff210: [top + 32] <- 0x21150d0a833b ; caller's pc | |
| 0x7fff5fbff208: [top + 24] <- 0x7fff5fbff268 ; caller's fp | |
| 0x7fff5fbff200: [top + 16] <- 0x30ea29d6f679; context | |
| 0x7fff5fbff1f8: [top + 8] <- 0x1c1b6309f759; function | |
| 0x7fff5fbff1f0: [top + 0] <- 0x30ea29d04121 <undefined> ; literal | |
| [deoptimizing (eager): end 0x1c1b6309f759 deoptCompare @9 => node=3, pc=0x21150d0a89ca, state=NO_REGISTERS, alignment=no padding, took 0.043 ms] |
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| begin_compilation | |
| name "optCompare" | |
| method "optCompare:0" | |
| date 1432994466000 | |
| end_compilation | |
| begin_cfg | |
| name "Z_Code generation" | |
| begin_block | |
| name "B0" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors | |
| successors "B1" | |
| xhandlers | |
| flags | |
| loop_depth 0 | |
| first_lir_id 0 | |
| last_lir_id 22 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v0 BlockEntry type:Tagged <|@ | |
| 0 2 t21 Constant 0x30ea29d04161 <false> [map 0x1abbf6c04461] <|@ | |
| 0 2 t20 Constant 0x30ea29d04141 <true> [map 0x1abbf6c04461] <|@ | |
| 0 3 t1 Context type:Tagged <|@ | |
| 0 2 t2 Parameter 0 type:Tagged <|@ | |
| 0 7 t3 Parameter 1 type:Tagged <|@ | |
| 0 7 t4 Parameter 2 type:Tagged <|@ | |
| 0 0 t5 ArgumentsObject t2 t3 t4 type:Tagged <|@ | |
| 0 0 v7 Simulate id=2 var[3] = t1, var[2] = t4, var[1] = t3, var[0] = t2 type:Tagged <|@ | |
| 0 0 v8 Goto B1 type:Tagged <|@ | |
| end_HIR | |
| begin_LIR | |
| 0 label () () () () [hir:v0] <|@ | |
| 2 gap () () () () [hir:v0] <|@ | |
| 4 context [rsi|R]= [hir:t1] <|@ | |
| 6 gap ((0) = [rsi|R];) () () () [hir:t1] <|@ | |
| 8 parameter [stack:-3]= [hir:t2] <|@ | |
| 10 gap () ([stack:-3];) () () [hir:t2] <|@ | |
| 12 parameter [stack:-2]= [hir:t3] <|@ | |
| 14 gap () ([stack:-2];) () () [hir:t3] <|@ | |
| 16 parameter [stack:-1]= [hir:t4] <|@ | |
| 18 gap () ([stack:-1];) () () [hir:t4] <|@ | |
| 20 gap () () () () [hir:v8] <|@ | |
| 22 goto B1 [hir:v8] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B1" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B0" | |
| successors "B3" "B2" | |
| xhandlers | |
| flags | |
| dominator "B0" | |
| loop_depth 0 | |
| first_lir_id 24 | |
| last_lir_id 62 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v9 BlockEntry type:Tagged <|@ | |
| 0 0 v10 Simulate id=3 type:Tagged <|@ | |
| 0 0 v11 StackCheck t1 changes[NewSpacePromotion] type:Tagged <|@ | |
| 0 0 t13 CheckHeapObject t3 pos:18 <|@ | |
| 0 0 t14 CheckMaps t3 [0x2c0d3604f59] pos:18 <|@ | |
| 0 1 i15 LoadNamedField t3.foo[in-object]@24 type:Smi pos:18 <|@ | |
| 0 0 t16 CheckHeapObject t4 pos:31 <|@ | |
| 0 0 t17 CheckMaps t4 [0x2c0d3604f59] pos:31 <|@ | |
| 0 1 i18 LoadNamedField t4.foo[in-object]@24 type:Smi pos:31 <|@ | |
| 0 0 i19 CompareNumericAndBranch EQ_STRICT i15 i18 goto (B3, B2) type:Tagged pos:27 <|@ | |
| end_HIR | |
| begin_LIR | |
| 24 label () () () () [hir:v9] <|@ | |
| 26 gap () ([rsi|R];) () () [hir:v9] <|@ | |
| 28 stack-check = [rsi|R] [id=3|parameters=3|arguments_stack_height=0|[stack:-3];[stack:-2];[stack:-1]] {[rsi|R]} [hir:v11] <|@ | |
| 30 gap () () () () [hir:v11] <|@ | |
| 32 lazy-bailout = [id=3|deopt_id=0|parameters=3|arguments_stack_height=0|[stack:-3];[stack:-2];[stack:-1]] [hir:v11] <|@ | |
| 34 gap () () ([rax|R] = [stack:-2];) () [hir:v11] <|@ | |
| 36 check-non-smi = [rax|R] [id=3|deopt_id=1|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[stack:-1]] [hir:t13] <|@ | |
| 38 gap () () () () [hir:t13] <|@ | |
| 40 check-maps = [rax|R] [id=3|deopt_id=2|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[stack:-1]] [hir:t14] <|@ | |
| 42 gap () () () () [hir:t14] <|@ | |
| 44 load-named-field [rbx|R]= [rax|R] [hir:i15] <|@ | |
| 46 gap ((0) = [rbx|R];) () ([rdx|R] = [stack:-1];) () [hir:i15] <|@ | |
| 48 check-non-smi = [rdx|R] [id=3|deopt_id=3|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R]] [hir:t16] <|@ | |
| 50 gap () () () () [hir:t16] <|@ | |
| 52 check-maps = [rdx|R] [id=3|deopt_id=4|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R]] [hir:t17] <|@ | |
| 54 gap () () () () [hir:t17] <|@ | |
| 56 load-named-field [rax|R]= [rdx|R] [hir:i18] <|@ | |
| 58 gap ((0) = [rax|R];) () () () [hir:i18] <|@ | |
| 60 gap () () () () [hir:i19] <|@ | |
| 62 compare-numeric-and-branch if [rbx|R] === [rax|R] then B3 else B2 [hir:i19] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B2" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B1" | |
| successors "B4" | |
| xhandlers | |
| flags | |
| dominator "B1" | |
| loop_depth 0 | |
| first_lir_id 64 | |
| last_lir_id 70 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v25 BlockEntry type:Tagged pos:27 <|@ | |
| 0 0 v26 Simulate id=18 push t21 type:Tagged pos:27 <|@ | |
| 0 0 v27 Goto B4 type:Tagged pos:27 <|@ | |
| end_HIR | |
| begin_LIR | |
| 64 label () () () () [hir:v25] <|@ | |
| 66 gap () () () () [hir:v25] <|@ | |
| 68 gap () ([rax|R] = [constant:21];) () () [hir:v27] <|@ | |
| 70 goto B4 [hir:v27] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B3" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B1" | |
| successors "B4" | |
| xhandlers | |
| flags | |
| dominator "B1" | |
| loop_depth 0 | |
| first_lir_id 72 | |
| last_lir_id 78 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v22 BlockEntry type:Tagged pos:27 <|@ | |
| 0 0 v23 Simulate id=18 push t20 type:Tagged pos:27 <|@ | |
| 0 0 v24 Goto B4 type:Tagged pos:27 <|@ | |
| end_HIR | |
| begin_LIR | |
| 72 label () () () () [hir:v22] <|@ | |
| 74 gap () () () () [hir:v22] <|@ | |
| 76 gap () ([rax|R] = [constant:20];) () () [hir:v24] <|@ | |
| 78 goto B4 [hir:v24] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B4" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B3" "B2" | |
| successors | |
| xhandlers | |
| flags | |
| dominator "B1" | |
| loop_depth 0 | |
| first_lir_id 80 | |
| last_lir_id 86 | |
| begin_states | |
| begin_locals | |
| size 1 | |
| method "None" | |
| 4 t28 [ t20 t21 uses:1_0s_0i_0d_0t] | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v29 BlockEntry type:Tagged pos:27 <|@ | |
| 0 1 s33 Constant 2 type:Smi pos:27 <|@ | |
| 0 0 v31 Return t28 (pop s33 values) type:Tagged pos:27 <|@ | |
| end_HIR | |
| begin_LIR | |
| 80 label () ((0) = [rax|R];) () () [hir:v29] <|@ | |
| 82 gap () ([rax|R];) () () [hir:v29] <|@ | |
| 84 return = [rax|R] NULL [constant:33] [hir:v31] <|@ | |
| 86 gap () () () () [hir:v31] <|@ | |
| end_LIR | |
| end_block | |
| end_cfg | |
| begin_compilation | |
| name "deoptCompare" | |
| method "deoptCompare:1" | |
| date 1432994466000 | |
| end_compilation | |
| begin_cfg | |
| name "Z_Code generation" | |
| begin_block | |
| name "B0" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors | |
| successors "B1" | |
| xhandlers | |
| flags | |
| loop_depth 0 | |
| first_lir_id 0 | |
| last_lir_id 22 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v0 BlockEntry type:Tagged <|@ | |
| 0 2 t31 Constant 0x30ea29d04161 <false> [map 0x1abbf6c04461] <|@ | |
| 0 2 t30 Constant 0x30ea29d04141 <true> [map 0x1abbf6c04461] <|@ | |
| 0 1 t6 Constant 0x30ea29d04121 <undefined> [map 0x1abbf6c04191] <|@ | |
| 0 3 t1 Context type:Tagged <|@ | |
| 0 2 t2 Parameter 0 type:Tagged <|@ | |
| 0 8 t3 Parameter 1 type:Tagged <|@ | |
| 0 8 t4 Parameter 2 type:Tagged <|@ | |
| 0 0 t5 ArgumentsObject t2 t3 t4 type:Tagged <|@ | |
| 0 0 v7 Simulate id=2 var[4] = t6, var[3] = t1, var[2] = t4, var[1] = t3, var[0] = t2 type:Tagged <|@ | |
| 0 0 v8 Goto B1 type:Tagged <|@ | |
| end_HIR | |
| begin_LIR | |
| 0 label () () () () [hir:v0] <|@ | |
| 2 gap () () () () [hir:v0] <|@ | |
| 4 context [rsi|R]= [hir:t1] <|@ | |
| 6 gap ((0) = [rsi|R];) () () () [hir:t1] <|@ | |
| 8 parameter [stack:-3]= [hir:t2] <|@ | |
| 10 gap () ([stack:-3];) () () [hir:t2] <|@ | |
| 12 parameter [stack:-2]= [hir:t3] <|@ | |
| 14 gap () ([stack:-2];) () () [hir:t3] <|@ | |
| 16 parameter [stack:-1]= [hir:t4] <|@ | |
| 18 gap () ([stack:-1];) () () [hir:t4] <|@ | |
| 20 gap () () () () [hir:v8] <|@ | |
| 22 goto B1 [hir:v8] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B1" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B0" | |
| successors "B3" "B2" | |
| xhandlers | |
| flags | |
| dominator "B0" | |
| loop_depth 0 | |
| first_lir_id 24 | |
| last_lir_id 102 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v9 BlockEntry type:Tagged <|@ | |
| 0 0 v10 Simulate id=3 type:Tagged <|@ | |
| 0 0 v11 StackCheck t1 changes[NewSpacePromotion] type:Tagged <|@ | |
| 0 3 t12 Constant 0x1d1e22b8f81 <String[3]: foo> [map 0x1abbf6c049b9] pos:22 <|@ | |
| 0 0 t16 CheckHeapObject t3 pos:39 <|@ | |
| 0 0 t17 CheckMaps t3 [0x2c0d3604f59] pos:39 <|@ | |
| 0 3 t18 LoadNamedField t3.%elements@16 type:Tagged pos:39 <|@ | |
| 0 1 i19 LoadNamedField t18.%length@8 type:Smi pos:39 <|@ | |
| 0 4 i44 Change t12 t to i type:TaggedNumber pos:39 <|@ | |
| 0 0 i20 BoundsCheck i44 i19 type:Tagged pos:39 <|@ | |
| 0 1 t21 LoadKeyed t18[i44] t3 type:Tagged pos:39 <|@ | |
| 0 0 t23 CheckHeapObject t4 pos:51 <|@ | |
| 0 0 t24 CheckMaps t4 [0x2c0d3604f59] pos:51 <|@ | |
| 0 3 t25 LoadNamedField t4.%elements@16 type:Tagged pos:51 <|@ | |
| 0 1 i26 LoadNamedField t25.%length@8 type:Smi pos:51 <|@ | |
| 0 0 i27 BoundsCheck i44 i26 type:Tagged pos:51 <|@ | |
| 0 1 t28 LoadKeyed t25[i44] t4 type:Tagged pos:51 <|@ | |
| 0 1 s45 Change t21 t to s type:TaggedNumber pos:38 <|@ | |
| 0 1 s46 Change t28 t to s type:TaggedNumber pos:50 <|@ | |
| 0 0 s29 CompareNumericAndBranch EQ_STRICT s45 s46 goto (B3, B2) type:Tagged pos:45 <|@ | |
| end_HIR | |
| begin_LIR | |
| 24 label () () () () [hir:v9] <|@ | |
| 26 gap () ([rsi|R];) () () [hir:v9] <|@ | |
| 28 stack-check = [rsi|R] [id=3|parameters=3|arguments_stack_height=0|[stack:-3];[stack:-2];[stack:-1];[constant:6]] {[rsi|R]} [hir:v11] <|@ | |
| 30 gap () () () () [hir:v11] <|@ | |
| 32 lazy-bailout = [id=3|deopt_id=0|parameters=3|arguments_stack_height=0|[stack:-3];[stack:-2];[stack:-1];[constant:6]] [hir:v11] <|@ | |
| 34 gap () () ([rax|R] = [stack:-2];) () [hir:v11] <|@ | |
| 36 check-non-smi = [rax|R] [id=3|deopt_id=1|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[stack:-1];[constant:6]] [hir:t16] <|@ | |
| 38 gap () () () () [hir:t16] <|@ | |
| 40 check-maps = [rax|R] [id=3|deopt_id=2|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[stack:-1];[constant:6]] [hir:t17] <|@ | |
| 42 gap () () () () [hir:t17] <|@ | |
| 44 load-named-field [rbx|R]= [rax|R] [hir:t18] <|@ | |
| 46 gap ((0) = [rbx|R];) () () () [hir:t18] <|@ | |
| 48 load-named-field [rdx|R]= [rbx|R] [hir:i19] <|@ | |
| 50 gap ((0) = [rdx|R];) () () () [hir:i19] <|@ | |
| 52 constant-t [rcx|R]= [hir:t12] <|@ | |
| 54 gap ((0) = [rcx|R];) ([rcx|R];) () () [hir:t12] <|@ | |
| 56 tagged-to-i [rcx|R]= [rcx|R] [id=3|deopt_id=9|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[stack:-1];[constant:6]] [hir:i44] <|@ | |
| 58 gap ((0) = [rcx|R];) () () () [hir:i44] <|@ | |
| 60 bounds-check = [rcx|R] [rdx|R] [id=3|deopt_id=3|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[stack:-1];[constant:6]] [hir:i20] <|@ | |
| 62 gap () () () () [hir:i20] <|@ | |
| 64 load-keyed [rbx|R][rbx|R][[rcx|R]] [hir:t21] <|@ | |
| 66 gap ((0) = [rbx|R];) () ([rdx|R] = [stack:-1];) () [hir:t21] <|@ | |
| 68 check-non-smi = [rdx|R] [id=3|deopt_id=4|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R];[constant:6]] [hir:t23] <|@ | |
| 70 gap () () () () [hir:t23] <|@ | |
| 72 check-maps = [rdx|R] [id=3|deopt_id=5|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R];[constant:6]] [hir:t24] <|@ | |
| 74 gap () () () () [hir:t24] <|@ | |
| 76 load-named-field [rsi|R]= [rdx|R] [hir:t25] <|@ | |
| 78 gap ((0) = [rsi|R];) () () () [hir:t25] <|@ | |
| 80 load-named-field [rdi|R]= [rsi|R] [hir:i26] <|@ | |
| 82 gap ((0) = [rdi|R];) () () () [hir:i26] <|@ | |
| 84 bounds-check = [rcx|R] [rdi|R] [id=3|deopt_id=6|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R];[constant:6]] [hir:i27] <|@ | |
| 86 gap () () () () [hir:i27] <|@ | |
| 88 load-keyed [rcx|R][rsi|R][[rcx|R]] [hir:t28] <|@ | |
| 90 gap ((0) = [rcx|R];) ([rbx|R];) () () [hir:t28] <|@ | |
| 92 check-smi [rbx|R]= [rbx|R] [id=3|deopt_id=7|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R];[constant:6]] [hir:s45] <|@ | |
| 94 gap ((0) = [rbx|R];) ([rcx|R];) () () [hir:s45] <|@ | |
| 96 check-smi [rcx|R]= [rcx|R] [id=3|deopt_id=8|parameters=3|arguments_stack_height=0|[stack:-3];[rax|R];[rdx|R];[constant:6]] [hir:s46] <|@ | |
| 98 gap ((0) = [rcx|R];) () () () [hir:s46] <|@ | |
| 100 gap () () () () [hir:s29] <|@ | |
| 102 compare-numeric-and-branch if [rbx|R] === [rcx|R] then B3 else B2 [hir:s29] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B2" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B1" | |
| successors "B4" | |
| xhandlers | |
| flags | |
| dominator "B1" | |
| loop_depth 0 | |
| first_lir_id 104 | |
| last_lir_id 110 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v35 BlockEntry type:Tagged pos:45 <|@ | |
| 0 0 v36 Simulate id=30 var[4] = t12, push t31 type:Tagged pos:45 <|@ | |
| 0 0 v37 Goto B4 type:Tagged pos:45 <|@ | |
| end_HIR | |
| begin_LIR | |
| 104 label () () () () [hir:v35] <|@ | |
| 106 gap () () () () [hir:v35] <|@ | |
| 108 gap () ([rax|R] = [constant:31];) () () [hir:v37] <|@ | |
| 110 goto B4 [hir:v37] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B3" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B1" | |
| successors "B4" | |
| xhandlers | |
| flags | |
| dominator "B1" | |
| loop_depth 0 | |
| first_lir_id 112 | |
| last_lir_id 118 | |
| begin_states | |
| begin_locals | |
| size 0 | |
| method "None" | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v32 BlockEntry type:Tagged pos:45 <|@ | |
| 0 0 v33 Simulate id=30 var[4] = t12, push t30 type:Tagged pos:45 <|@ | |
| 0 0 v34 Goto B4 type:Tagged pos:45 <|@ | |
| end_HIR | |
| begin_LIR | |
| 112 label () () () () [hir:v32] <|@ | |
| 114 gap () () () () [hir:v32] <|@ | |
| 116 gap () ([rax|R] = [constant:30];) () () [hir:v34] <|@ | |
| 118 goto B4 [hir:v34] <|@ | |
| end_LIR | |
| end_block | |
| begin_block | |
| name "B4" | |
| from_bci -1 | |
| to_bci -1 | |
| predecessors "B3" "B2" | |
| successors | |
| xhandlers | |
| flags | |
| dominator "B1" | |
| loop_depth 0 | |
| first_lir_id 120 | |
| last_lir_id 126 | |
| begin_states | |
| begin_locals | |
| size 1 | |
| method "None" | |
| 5 t38 [ t30 t31 uses:1_0s_0i_0d_0t] | |
| end_locals | |
| end_states | |
| begin_HIR | |
| 0 0 v39 BlockEntry type:Tagged pos:45 <|@ | |
| 0 1 s47 Constant 2 type:Smi pos:45 <|@ | |
| 0 0 v41 Return t38 (pop s47 values) type:Tagged pos:45 <|@ | |
| end_HIR | |
| begin_LIR | |
| 120 label () ((0) = [rax|R];) () () [hir:v39] <|@ | |
| 122 gap () ([rax|R];) () () [hir:v39] <|@ | |
| 124 return = [rax|R] NULL [constant:47] [hir:v41] <|@ | |
| 126 gap () () () () [hir:v41] <|@ | |
| end_LIR | |
| end_block | |
| end_cfg |
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| 'use strict'; | |
| var obj1 = { foo: 0 } | |
| , obj2 = { foo: 0 } | |
| function optCompare(a, b) { | |
| return a['foo'] === b['foo'] | |
| } | |
| function deoptCompare(a, b) { | |
| var prop = 'foo' | |
| return a[prop] === b[prop] | |
| } | |
| optCompare(obj1, obj2) | |
| optCompare(obj1, obj2) | |
| ;%OptimizeFunctionOnNextCall(optCompare) | |
| optCompare(obj1, obj2) | |
| deoptCompare(obj1, obj2) | |
| deoptCompare(obj1, obj2) | |
| ;%OptimizeFunctionOnNextCall(deoptCompare) | |
| deoptCompare(obj1, obj2) |
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