[llvm-commits] [PATCH] Teach MachineInstr::isRegTiedToDefOperand() to correctly parse inline asm operands

[Jakob Stoklund Olesen]

Hi,

The method MachineInstr:: isRegTiedToDefOperand() tries to find the  
flag operand on an inline asm instruction by going backwards from a  
register operand until it sees an immediate operand. This fails for  
PowerPC "m"-type asm operands represented as (flag, imm, reg) triples,  
causing assertions when imm<0.

The attached patch changes isRegTiedToDefOperand to search for the  
operand flag from the beginning of the operand list. It is the only  
safe way.

After applying this patch the the machine code verifier no longer  
trips assertions in the CodeGen/PowerPC test suite.

Regards,
/jakob
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