[clang] Avoid printing overly large integer. (PR #75902)

[Nhat Nguyen via cfe-commits]

https://github.com/changkhothuychung updated https://github.com/llvm/llvm-project/pull/75902

>From 0eb58740f33f2eef29c28e43e78118f9f0eea4b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9CNhat?= <“nhat7203 at gmail.com”>
Date: Tue, 19 Dec 2023 00:03:28 -0800
Subject: [PATCH 1/3] return false if the value is too large

---
 clang/lib/Sema/SemaDeclCXX.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index a3f68d4ffc0f6e..18631ec7dac152 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -17132,6 +17132,9 @@ static bool ConvertAPValueToString(const APValue &V, QualType T,
         case BuiltinType::WChar_U: {
           unsigned TyWidth = Context.getIntWidth(T);
           assert(8 <= TyWidth && TyWidth <= 32 && "Unexpected integer width");
+          if (V.getInt() >= (1 << 64)) {
+            return false;
+          }
           uint32_t CodeUnit = static_cast<uint32_t>(V.getInt().getZExtValue());
           WriteCharTypePrefix(BTy->getKind(), OS);
           OS << '\'';

>From 5e6326fb1cf4f1591fe927c94b1d16d1a7be0e66 Mon Sep 17 00:00:00 2001
From: Nhat Nguyen <nhat7203 at gmail.com>
Date: Thu, 21 Dec 2023 13:26:13 -0500
Subject: [PATCH 2/3] Update clang/lib/Sema/SemaDeclCXX.cpp

Co-authored-by: Yueh-Shun Li <shamrocklee at posteo.net>
---
 clang/lib/Sema/SemaDeclCXX.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 18631ec7dac152..196e32a4a349f2 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -17132,7 +17132,7 @@ static bool ConvertAPValueToString(const APValue &V, QualType T,
         case BuiltinType::WChar_U: {
           unsigned TyWidth = Context.getIntWidth(T);
           assert(8 <= TyWidth && TyWidth <= 32 && "Unexpected integer width");
-          if (V.getInt() >= (1 << 64)) {
+          if (V.getInt() > std::numeric_limits<uint64_t>::max() || V.getInt() < std::numeric_limits<int64_t>::min()) {
             return false;
           }
           uint32_t CodeUnit = static_cast<uint32_t>(V.getInt().getZExtValue());

>From b2794aba6969d694b55ab3a91ac1616f8469cd46 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9CNhat?= <“nhat7203 at gmail.com”>
Date: Thu, 21 Dec 2023 10:34:00 -0800
Subject: [PATCH 3/3] clang format

---
 clang/lib/Sema/SemaDeclCXX.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 196e32a4a349f2..323890b38daeec 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -17132,7 +17132,8 @@ static bool ConvertAPValueToString(const APValue &V, QualType T,
         case BuiltinType::WChar_U: {
           unsigned TyWidth = Context.getIntWidth(T);
           assert(8 <= TyWidth && TyWidth <= 32 && "Unexpected integer width");
-          if (V.getInt() > std::numeric_limits<uint64_t>::max() || V.getInt() < std::numeric_limits<int64_t>::min()) {
+          if (V.getInt() > std::numeric_limits<uint64_t>::max() || 
+              V.getInt() < std::numeric_limits<int64_t>::min()) {
             return false;
           }
           uint32_t CodeUnit = static_cast<uint32_t>(V.getInt().getZExtValue());