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remove the pointless check of MemoryUseIntrinsic from

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is trivially dead, since these have side effects.  This makes the
(misnamed) MemoryUseIntrinsic class dead, so remove it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120382 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-11-30 02:03:47 +00:00
parent 12bf43bc4f
commit d6f02d1fff
2 changed files with 1 additions and 27 deletions
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25
include/llvm/IntrinsicInst.h
View File

@ -55,7 +55,7 @@ namespace llvm {
return isa<CallInst>(V) && classof(cast<CallInst>(V));
}
};
/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
///
class DbgInfoIntrinsic : public IntrinsicInst {
@ -297,29 +297,6 @@ namespace llvm {
}
};
/// MemoryUseIntrinsic - This is the common base class for the memory use
/// marker intrinsics.
///
class MemoryUseIntrinsic : public IntrinsicInst {
public:
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MemoryUseIntrinsic *) { return true; }
static inline bool classof(const IntrinsicInst *I) {
switch (I->getIntrinsicID()) {
case Intrinsic::lifetime_start:
case Intrinsic::lifetime_end:
case Intrinsic::invariant_start:
case Intrinsic::invariant_end:
return true;
default: return false;
}
}
static inline bool classof(const Value *V) {
return isa<IntrinsicInst>(V) && classof(cast<IntrinsicInst>(V));
}
};
}
#endif

3
lib/Transforms/Utils/Local.cpp
View File

@ -209,9 +209,6 @@ bool llvm::isInstructionTriviallyDead(Instruction *I) {
// We don't want debug info removed by anything this general.
if (isa<DbgInfoIntrinsic>(I)) return false;
// Likewise for memory use markers.
if (isa<MemoryUseIntrinsic>(I)) return false;
if (!I->mayHaveSideEffects()) return true;
// Special case intrinsics that "may have side effects" but can be deleted