[llvm] [IR] Add initial support for the byte type (PR #178666)

[Nikita Popov via llvm-commits]

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@@ -2423,6 +2427,47 @@ LLVM_C_ABI LLVMValueRef LLVMConstIntOfStringAndSize(LLVMTypeRef IntTy,
                                                     unsigned SLen,
                                                     uint8_t Radix);
 
+/**
+ * Obtain a constant value for a byte type.
+ *
+ * The returned value corresponds to a llvm::ConstantByte.
+ *
+ * @see llvm::ConstantByte::get()
+ *
+ * @param ByteTy Byte type to obtain value of.
+ * @param N The value the returned instance should refer to.
+ */
+LLVMValueRef LLVMConstByte(LLVMTypeRef ByteTy, unsigned long long N);
+
+/**
+ * Obtain a constant value for a byte of arbitrary precision.
+ *
+ * @see llvm::ConstantByte::get()
+ */
+LLVMValueRef LLVMConstByteOfArbitraryPrecision(LLVMTypeRef ByteTy,
+                                               unsigned NumWords,
+                                               const uint64_t Words[]);
+
+/**
+ * Obtain a constant value for a byte parsed from a string.
+ *
+ * A similar API, LLVMConstByteOfStringAndSize is also available. If the
+ * string's length is available, it is preferred to call that function
+ * instead.
+ *
+ * @see llvm::ConstantByte::get()
+ */
+LLVMValueRef LLVMConstByteOfString(LLVMTypeRef ByteTy, const char *Text,
+                                   uint8_t Radix);
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nikic wrote:

Only add the variant with size.

https://github.com/llvm/llvm-project/pull/178666