diff --git a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
index 6d06c0a..f3268d2 100644
--- a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
+++ b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
@@ -22,10 +22,9 @@
#define DEBUG_TYPE "instcombine"
-/// ShrinkDemandedConstant - Check to see if the specified operand of the
-/// specified instruction is a constant integer. If so, check to see if there
-/// are any bits set in the constant that are not demanded. If so, shrink the
-/// constant and return true.
+/// Check to see if the specified operand of the specified instruction is a
+/// constant integer. If so, check to see if there are any bits set in the
+/// constant that are not demanded. If so, shrink the constant and return true.
static bool ShrinkDemandedConstant(Instruction *I, unsigned OpNo,
APInt Demanded) {
assert(I && "No instruction?");
@@ -49,9 +48,8 @@
-/// SimplifyDemandedInstructionBits - Inst is an integer instruction that
-/// SimplifyDemandedBits knows about. See if the instruction has any
-/// properties that allow us to simplify its operands.
+/// Inst is an integer instruction that SimplifyDemandedBits knows about. See if
+/// the instruction has any properties that allow us to simplify its operands.
bool InstCombiner::SimplifyDemandedInstructionBits(Instruction &Inst) {
unsigned BitWidth = Inst.getType()->getScalarSizeInBits();
APInt KnownZero(BitWidth, 0), KnownOne(BitWidth, 0);
@@ -65,9 +63,9 @@
return true;
}
-/// SimplifyDemandedBits - This form of SimplifyDemandedBits simplifies the
-/// specified instruction operand if possible, updating it in place. It returns
-/// true if it made any change and false otherwise.
+/// This form of SimplifyDemandedBits simplifies the specified instruction
+/// operand if possible, updating it in place. It returns true if it made any
+/// change and false otherwise.
bool InstCombiner::SimplifyDemandedBits(Use &U, const APInt &DemandedMask,
APInt &KnownZero, APInt &KnownOne,
unsigned Depth) {
@@ -80,21 +78,22 @@
}
-/// SimplifyDemandedUseBits - This function attempts to replace V with a simpler
-/// value based on the demanded bits. When this function is called, it is known
-/// that only the bits set in DemandedMask of the result of V are ever used
-/// downstream. Consequently, depending on the mask and V, it may be possible
-/// to replace V with a constant or one of its operands. In such cases, this
-/// function does the replacement and returns true. In all other cases, it
-/// returns false after analyzing the expression and setting KnownOne and known
-/// to be one in the expression. KnownZero contains all the bits that are known
-/// to be zero in the expression. These are provided to potentially allow the
-/// caller (which might recursively be SimplifyDemandedBits itself) to simplify
-/// the expression. KnownOne and KnownZero always follow the invariant that
-/// KnownOne & KnownZero == 0. That is, a bit can't be both 1 and 0. Note that
-/// the bits in KnownOne and KnownZero may only be accurate for those bits set
-/// in DemandedMask. Note also that the bitwidth of V, DemandedMask, KnownZero
-/// and KnownOne must all be the same.
+/// This function attempts to replace V with a simpler value based on the
+/// demanded bits. When this function is called, it is known that only the bits
+/// set in DemandedMask of the result of V are ever used downstream.
+/// Consequently, depending on the mask and V, it may be possible to replace V
+/// with a constant or one of its operands. In such cases, this function does
+/// the replacement and returns true. In all other cases, it returns false after
+/// analyzing the expression and setting KnownOne and known to be one in the
+/// expression. KnownZero contains all the bits that are known to be zero in the
+/// expression. These are provided to potentially allow the caller (which might
+/// recursively be SimplifyDemandedBits itself) to simplify the expression.
+/// KnownOne and KnownZero always follow the invariant that:
+/// KnownOne & KnownZero == 0.
+/// That is, a bit can't be both 1 and 0. Note that the bits in KnownOne and
+/// KnownZero may only be accurate for those bits set in DemandedMask. Note also
+/// that the bitwidth of V, DemandedMask, KnownZero and KnownOne must all be the
+/// same.
///
/// This returns null if it did not change anything and it permits no
/// simplification. This returns V itself if it did some simplification of V's
@@ -896,10 +895,10 @@
return nullptr;
}
-/// SimplifyDemandedVectorElts - The specified value produces a vector with
-/// any number of elements. DemandedElts contains the set of elements that are
-/// actually used by the caller. This method analyzes which elements of the
-/// operand are undef and returns that information in UndefElts.
+/// The specified value produces a vector with any number of elements.
+/// DemandedElts contains the set of elements that are actually used by the
+/// caller. This method analyzes which elements of the operand are undef and
+/// returns that information in UndefElts.
///
/// If the information about demanded elements can be used to simplify the
/// operation, the operation is simplified, then the resultant value is