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Add TargetInstrInfo interface isAsCheapAsAMove.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214158 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jiangning Liu
2014-07-29 01:55:19 +00:00
parent 994af148ca
commit f3224d0617
8 changed files with 23 additions and 9 deletions
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12
include/llvm/MC/MCInstrDesc.h
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@@ -451,9 +451,12 @@ public:
}
/// isRematerializable - Returns true if this instruction is a candidate for
/// remat. This flag is deprecated, please don't use it anymore. If this
/// flag is set, the isReallyTriviallyReMaterializable() method is called to
/// verify the instruction is really rematable.
/// remat. This flag is only used in TargetInstrInfo method
/// isTriviallyRematerializable.
///
/// If this flag is set, the isReallyTriviallyReMaterializable()
/// or isReallyTriviallyReMaterializableGeneric methods are called to verify
/// the instruction is really rematable.
bool isRematerializable() const {
return Flags & (1 << MCID::Rematerializable);
}
@@ -464,6 +467,9 @@ public:
/// where we would like to remat or hoist the instruction, but not if it costs
/// more than moving the instruction into the appropriate register. Note, we
/// are not marking copies from and to the same register class with this flag.
///
/// This method could be called by interface TargetInstrInfo::isAsCheapAsAMove
/// for different subtargets.
bool isAsCheapAsAMove() const {
return Flags & (1 << MCID::CheapAsAMove);
}