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explain what earlyclobber actually is.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56415 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2008-09-21 23:30:17 +00:00
parent 743922ea75
commit 14743e83b9
1 changed files with 3 additions and 3 deletions
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6
include/llvm/CodeGen/MachineOperand.h
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@ -68,9 +68,9 @@ private:
/// This is only valid on definitions of registers.
bool IsDead : 1;
/// IsEarlyClobber - True if this MO_Register operand is marked earlyclobber
/// in an inline asm. Flag is not valid for any other case. See gcc doc
/// for description of earlyclobber.
/// IsEarlyClobber - True if this MO_Register 'def' operand is written to
/// by the MachineInstr before all input registers are read. This is used to
/// model the GCC inline asm '&' constraint modifier.
bool IsEarlyClobber : 1;
/// OverlapsEarlyClobber - True if this MO_Register operand is used as an