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| -rw-r--r-- | mu.md | 5 |
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diff --git a/mu.md b/mu.md index 26d04eec..cf855615 100644 --- a/mu.md +++ b/mu.md @@ -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. |