[LLVM-C] Support debug info for enumerators of arbitrary sizes (#76735)

Since `LLVMDIBuilderCreateEnumerator` only supports up to 64 bits, this
PR adds a new `LLVMDIBuilderCreateEnumeratorOfArbitraryPrecision`
function that takes an arbitrary number of words, based on
`LLVMConstIntOfArbitraryPrecision`. This allows even larger enumeration
types to represent their values exactly. (It seems LLVM should already
support i128 enums since 13.0.0.)

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/IR/DebugInfo.cpp b/llvm/lib/IR/DebugInfo.cpp
index 7a133b2..557b57d 100644
--- a/llvm/lib/IR/DebugInfo.cpp
+++ b/llvm/lib/IR/DebugInfo.cpp
@@ -13,6 +13,7 @@
 
 #include "llvm-c/DebugInfo.h"
 #include "LLVMContextImpl.h"
+#include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/STLExtras.h"
@@ -1297,6 +1298,15 @@ LLVMMetadataRef LLVMDIBuilderCreateEnumerator(LLVMDIBuilderRef Builder,
                                                 IsUnsigned != 0));
 }
 
+LLVMMetadataRef LLVMDIBuilderCreateEnumeratorOfArbitraryPrecision(
+    LLVMDIBuilderRef Builder, const char *Name, size_t NameLen,
+    uint64_t SizeInBits, const uint64_t Words[], LLVMBool IsUnsigned) {
+  uint64_t NumWords = (SizeInBits + 63) / 64;
+  return wrap(unwrap(Builder)->createEnumerator(
+      {Name, NameLen},
+      APSInt(APInt(SizeInBits, ArrayRef(Words, NumWords)), IsUnsigned != 0)));
+}
+
 LLVMMetadataRef LLVMDIBuilderCreateEnumerationType(
   LLVMDIBuilderRef Builder, LLVMMetadataRef Scope, const char *Name,
   size_t NameLen, LLVMMetadataRef File, unsigned LineNumber,