chore: fix some comments

Signed-off-by: luozexuan <[email protected]>

suite/synctools/tablegen/include/llvm/IR/Constants.h

@@ -108,7 +108,7 @@ class ConstantInt final : public ConstantData {
   static ConstantInt *get(IntegerType *Ty, uint64_t V, bool IsSigned = false);
 
   /// Return a ConstantInt with the specified value for the specified type. The
-  /// value V will be canonicalized to a an unsigned APInt. Accessing it with
+  /// value V will be canonicalized to an unsigned APInt. Accessing it with
   /// either getSExtValue() or getZExtValue() will yield a correctly sized and
   /// signed value for the type Ty.
   /// Get a ConstantInt for a specific signed value.

suite/synctools/tablegen/include/llvm/Target/GenericOpcodes.td

@@ -51,7 +51,7 @@ def G_SEXT : GenericInstruction {
   let hasSideEffects = false;
 }
 
-// Sign extend the a value from an arbitrary bit position, copying the sign bit
+// Sign extend the value from an arbitrary bit position, copying the sign bit
 // into all bits above it. This is equivalent to a shl + ashr pair with an
 // appropriate shift amount. $sz is an immediate (MachineOperand::isImm()
 // returns true) to allow targets to have some bitwidths legal and others