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Fix the other comment to use modern doxygen style and be a bit more

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direct. Notably, comment on the fact that the loaded type is significant
in that it determines how wide of an access must be safe.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220150 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2014-10-18 23:46:17 +00:00
parent 28502a895a
commit dacb8a615d
1 changed files with 8 additions and 4 deletions
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12
lib/Analysis/Loads.cpp
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@ -53,10 +53,14 @@ static bool AreEquivalentAddressValues(const Value *A, const Value *B) {
return false;
}
/// isSafeToLoadUnconditionally - Return true if we know that executing a load
/// from this value cannot trap. If it is not obviously safe to load from the
/// specified pointer, we do a quick local scan of the basic block containing
/// ScanFrom, to determine if the address is already accessed.
/// \brief Check if executing a load of this pointer value cannot trap.
///
/// If it is not obviously safe to load from the specified pointer, we do
/// a quick local scan of the basic block containing \c ScanFrom, to determine
/// if the address is already accessed.
///
/// This uses the pointee type to determine how many bytes need to be safe to
/// load from the pointer.
bool llvm::isSafeToLoadUnconditionally(Value *V, Instruction *ScanFrom,
unsigned Align, const DataLayout *TD) {
int64_t ByteOffset = 0;