Identifiers

regular expression
'[%@][a-zA-Z$._][a-zA-Z$._0-9]*'.

• @全域變數
• %區域變數
• @1 $2這些應該是暫存變數不確定)
• 可用跳脫字元\
• 雙引號夾著有作用

範例

%result = mul i32 %X, 8

%result = shl i32 %X, 3

%0 = add i32 %X, %X           ; yields i32:%0  
%1 = add i32 %0, %0           ; yields i32:%1  
%result = add i32 %1, %1

High Level Structure

Module Structure

Each module consists of functions, global variables, and symbol table entries.

Linkage Types

• private:只有目前module可存取不，顯示在symbol table上(This doesn’t show up in any symbol table in the object file.)
• internal:跟private功能差不多 類似C的static
• available_externally
• linkonce
• weak
• common
• appending
• extern_weak
• linkonce_odr, weak_odr
• external