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62316fa00a
AsmMatcherEmitter. This function maps inline assembly operands to MCInst
operands.
For example, '__asm mov j, eax' is represented by the follow MCInst:
<MCInst 1460 <MCOperand Reg:0> <MCOperand Imm:1> <MCOperand Reg:0>
<MCOperand Expr:(j)> <MCOperand Reg:0> <MCOperand Reg:43>>
The first 5 MCInst operands are a result of j matching as a memory operand
consisting of a BaseReg (Reg:0), MemScale (Imm:1), MemIndexReg(Reg:0),
Expr (Expr:(j), and a MemSegReg (Reg:0). The 6th MCInst operand represents
the eax register (Reg:43).
This translation is necessary to determine the Input and Output Exprs. If a
single asm operand maps to multiple MCInst operands, the index of the first
MCInst operand is returned. Ideally, it would return the operand we really
care out (i.e., the Expr:(j) in this case), but I haven't found an easy way
of doing this yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162920 91177308-0d34-0410-b5e6-96231b3b80d8
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