[Analysis] Use std::optional in ValueTracking.cpp (NFC)

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

1 files changed, 4 insertions, 3 deletions

diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 09b8131..28463bb 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -74,6 +74,7 @@
 #include <algorithm>
 #include <cassert>
 #include <cstdint>
+#include <optional>
 #include <utility>
 
 using namespace llvm;
@@ -1016,7 +1017,7 @@ static void computeKnownBitsFromShiftOperator(
   // If we know the shifter operand is nonzero, we can sometimes infer more
   // known bits. However this is expensive to compute, so be lazy about it and
   // only compute it when absolutely necessary.
-  Optional<bool> ShifterOperandIsNonZero;
+  std::optional<bool> ShifterOperandIsNonZero;
 
   // Early exit if we can't constrain any well-defined shift amount.
   if (!(ShiftAmtKZ & (PowerOf2Ceil(BitWidth) - 1)) &&
@@ -2745,7 +2746,7 @@ bool isKnownNonZero(const Value* V, unsigned Depth, const Query& Q) {
 /// every input value to exactly one output value.  This is equivalent to
 /// saying that Op1 and Op2 are equal exactly when the specified pair of
 /// operands are equal, (except that Op1 and Op2 may be poison more often.)
-static Optional<std::pair<Value*, Value*>>
+static std::optional<std::pair<Value*, Value*>>
 getInvertibleOperands(const Operator *Op1,
                       const Operator *Op2) {
   if (Op1->getOpcode() != Op2->getOpcode())
@@ -7322,7 +7323,7 @@ ConstantRange llvm::computeConstantRange(const Value *V, bool ForSigned,
   return CR;
 }
 
-static Optional<int64_t>
+static std::optional<int64_t>
 getOffsetFromIndex(const GEPOperator *GEP, unsigned Idx, const DataLayout &DL) {
   // Skip over the first indices.
   gep_type_iterator GTI = gep_type_begin(GEP);