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Kartik Agaram 2020-07-06 11:13:12 -07:00
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@ -127,6 +127,11 @@ or memory.
Variables on the stack are never initialized. (They're always implicitly
zeroed them out.) Variables in registers are always initialized.
Register variables can go in 6 registers: `eax`, `ebx`, `ecx`, `edx`, `esi`
and `edi`. Defining a variable in a register either clobbers the previous
variable (if it was defined in the same block) or shadows it temporarily (if
it was defined in an outer block).
Variables exist from their definition until the end of their containing block.
Register variables may also die earlier if their register is clobbered by a
new variable.