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Lots of comment fixes and cleanups from Duncan's review.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2012-09-14 10:18:49 +00:00
parent ad9f5b8967
commit 7f5bedec74
1 changed files with 12 additions and 10 deletions
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22
lib/Transforms/Scalar/SROA.cpp
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@ -74,7 +74,7 @@ namespace {
/// information about the nature of uses of each slice of the alloca. The goal
/// is that this information is sufficient to decide if and how to split the
/// alloca apart and replace slices with scalars. It is also intended that this
/// structure can capture the relevant information needed both due decide about
/// structure can capture the relevant information needed both to decide about
/// and to enact these transformations.
class AllocaPartitioning {
public:
@ -94,7 +94,7 @@ public:
///
/// This provides an ordering over ranges such that start offsets are
/// always increasing, and within equal start offsets, the end offsets are
/// decreasing. Thus the spanning range comes first in in cluster with the
/// decreasing. Thus the spanning range comes first in a cluster with the
/// same start position.
bool operator<(const ByteRange &RHS) const {
if (BeginOffset < RHS.BeginOffset) return true;
@ -124,7 +124,7 @@ public:
/// \brief Whether this partition is splittable into smaller partitions.
///
/// We flag partitions as splittable when they are formed entirely due to
/// accesses by trivially split operations such as memset and memcpy.
/// accesses by trivially splittable operations such as memset and memcpy.
///
/// FIXME: At some point we should consider loads and stores of FCAs to be
/// splittable and eagerly split them into scalar values.
@ -142,7 +142,7 @@ public:
/// and includes a handle to the user itself and the pointer value in use.
/// The bounds of these uses are determined by intersecting the bounds of the
/// memory use itself with a particular partition. As a consequence there is
/// intentionally overlap between various usues of the same partition.
/// intentionally overlap between various uses of the same partition.
struct PartitionUse : public ByteRange {
/// \brief The user of this range of the alloca.
AssertingVH<Instruction> User;
@ -224,7 +224,7 @@ public:
dead_user_iterator dead_user_end() const { return DeadUsers.end(); }
/// @}
/// \brief Allow iterating the dead operands referring to this alloca.
/// \brief Allow iterating the dead expressions referring to this alloca.
///
/// These are operands which have cannot actually be used to refer to the
/// alloca as they are outside its range and the user doesn't correct for
@ -315,8 +315,10 @@ private:
///
/// We store a vector of the partitions over the alloca here. This vector is
/// sorted by increasing begin offset, and then by decreasing end offset. See
/// the Partition inner class for more details. Initially there are overlaps,
/// be during construction we form a disjoint sequence toward the end.
/// the Partition inner class for more details. Initially (during
/// construction) there are overlaps, but we form a disjoint sequence of
/// partitions while finishing construction and a fully constructed object is
/// expected to always have this as a disjoint space.
SmallVector<Partition, 8> Partitions;
/// \brief The uses of the partitions.
@ -716,8 +718,8 @@ private:
/// \brief Use adder for the alloca partitioning.
///
/// This class adds the uses of an alloca to all of the partitions which it
/// uses. For splittable partitions, this can end up doing essentially a linear
/// This class adds the uses of an alloca to all of the partitions which they
/// use. For splittable partitions, this can end up doing essentially a linear
/// walk of the partitions, but the number of steps remains bounded by the
/// total result instruction size:
/// - The number of partitions is a result of the number unsplittable
@ -1354,7 +1356,7 @@ static Value *getNaturalGEPRecursively(IRBuilder<> &IRB, const TargetData &TD,
/// possible. We recurse by decreasing Offset, adding the appropriate index to
/// Indices, and setting Ty to the result subtype.
///
/// If no natural GEP can be constructed, this function returns a null Value*.
/// If no natural GEP can be constructed, this function returns null.
static Value *getNaturalGEPWithOffset(IRBuilder<> &IRB, const TargetData &TD,
Value *Ptr, APInt Offset, Type *TargetTy,
SmallVectorImpl<Value *> &Indices,