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MachineInstr: Explain the subtle semantics of uses()/defs()

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242438 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2015-07-16 20:27:01 +00:00
parent 1241b83d61
commit da787addf3
1 changed files with 6 additions and 0 deletions
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6
include/llvm/CodeGen/MachineInstr.h
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@ -314,18 +314,24 @@ public:
return iterator_range<const_mop_iterator>(explicit_operands().end(),
operands_end());
}
/// Returns a range over all explicit operands that are register definitions.
/// Implicit definition are not included!
iterator_range<mop_iterator> defs() {
return iterator_range<mop_iterator>(
operands_begin(), operands_begin() + getDesc().getNumDefs());
}
/// \copydoc defs()
iterator_range<const_mop_iterator> defs() const {
return iterator_range<const_mop_iterator>(
operands_begin(), operands_begin() + getDesc().getNumDefs());
}
/// Returns a range that includes all operands that are register uses.
/// This may include unrelated operands which are not register uses.
iterator_range<mop_iterator> uses() {
return iterator_range<mop_iterator>(
operands_begin() + getDesc().getNumDefs(), operands_end());
}
/// \copydoc uses()
iterator_range<const_mop_iterator> uses() const {
return iterator_range<const_mop_iterator>(
operands_begin() + getDesc().getNumDefs(), operands_end());