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Add TargetRegisterInfo::hasRegUnit().

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This trivial helper function tests if a register contains a register
unit. It is similar to regsOverlap(), but with asymmetric arguments.

llvm-svn: 161180
This commit is contained in:
Jakob Stoklund Olesen 2012-08-02 14:45:53 +00:00
parent 4ab0d4a8d1
commit ece141b6e3
1 changed files with 8 additions and 0 deletions
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8
include/llvm/Target/TargetRegisterInfo.h
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@ -349,6 +349,14 @@ public:
return false;
}
/// hasRegUnit - Returns true if Reg contains RegUnit.
bool hasRegUnit(unsigned Reg, unsigned RegUnit) const {
for (MCRegUnitIterator Units(Reg, this); Units.isValid(); ++Units)
if (*Units == RegUnit)
return true;
return false;
}
/// isSubRegister - Returns true if regB is a sub-register of regA.
///
bool isSubRegister(unsigned regA, unsigned regB) const {