[clang] 62a932a - [SystemZ][z/OS] Fix zos_translation_time module flag (#210058)

[via cfe-commits]

Author: Abhina Sree
Date: 2026-07-17T08:10:10-04:00
New Revision: 62a932ac3e2702a5493934c6362f9e058a204557

URL: https://github.com/llvm/llvm-project/commit/62a932ac3e2702a5493934c6362f9e058a204557
DIFF: https://github.com/llvm/llvm-project/commit/62a932ac3e2702a5493934c6362f9e058a204557.diff

LOG: [SystemZ][z/OS] Fix zos_translation_time module flag (#210058)

The zos_translation_time flag needs to be 64-bit to handle the year 2038
problem.

Added: 
    clang/test/CodeGen/SystemZ/systemz-module.flags.c

Modified: 
    clang/lib/CodeGen/CodeGenModule.cpp
    llvm/include/llvm/IR/Module.h
    llvm/lib/IR/Module.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index ca71458d85134..d1119e6c00d14 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -1356,7 +1356,8 @@ void CodeGenModule::Release() {
   uint64_t WCharWidth =
       Context.getTypeSizeInChars(Context.getWideCharType()).getQuantity();
   if (WCharWidth != getTriple().getDefaultWCharSize())
-    getModule().addModuleFlag(llvm::Module::Error, "wchar_size", WCharWidth);
+    getModule().addModuleFlag(llvm::Module::Error, "wchar_size",
+                              static_cast<uint32_t>(WCharWidth));
 
   if (getTriple().isOSzOS()) {
     getModule().addModuleFlag(llvm::Module::Warning,
@@ -1391,7 +1392,7 @@ void CodeGenModule::Release() {
   llvm::Triple T = Context.getTargetInfo().getTriple();
   if (T.isARM() || T.isThumb()) {
     // The minimum width of an enum in bytes
-    uint64_t EnumWidth = Context.getLangOpts().ShortEnums ? 1 : 4;
+    uint32_t EnumWidth = Context.getLangOpts().ShortEnums ? 1 : 4;
     getModule().addModuleFlag(llvm::Module::Error, "min_enum_size", EnumWidth);
   }
 
@@ -1558,7 +1559,8 @@ void CodeGenModule::Release() {
 
       assert(getTriple().isOSBinFormatELF());
       using namespace llvm::ELF;
-      uint64_t PAuthABIVersion =
+      assert(AARCH64_PAUTH_PLATFORM_LLVM_LINUX_VERSION_LAST < 32);
+      uint32_t PAuthABIVersion =
           (LangOpts.PointerAuthIntrinsics
            << AARCH64_PAUTH_PLATFORM_LLVM_LINUX_VERSION_INTRINSICS) |
           (LangOpts.PointerAuthCalls

diff  --git a/clang/test/CodeGen/SystemZ/systemz-module.flags.c b/clang/test/CodeGen/SystemZ/systemz-module.flags.c
new file mode 100644
index 0000000000000..261dec81a4d52
--- /dev/null
+++ b/clang/test/CodeGen/SystemZ/systemz-module.flags.c
@@ -0,0 +1,3 @@
+// RUN: %clang_cc1 -source-date-epoch 253402300799 -triple s390x-ibm-zos -emit-llvm -o - %s | FileCheck %s
+// CHECK: {{.*}}"zos_cu_language", !"C"}
+// CHECK: {{.*}}"zos_translation_time", i64 253402300799}

diff  --git a/llvm/include/llvm/IR/Module.h b/llvm/include/llvm/IR/Module.h
index 3c6c2ccbdccc8..cfc6b34ced5ce 100644
--- a/llvm/include/llvm/IR/Module.h
+++ b/llvm/include/llvm/IR/Module.h
@@ -603,12 +603,20 @@ class LLVM_ABI Module {
   /// the module-level flags named metadata if it doesn't already exist.
   void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, Metadata *Val);
   void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, Constant *Val);
+  void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, uint64_t Val);
   void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, uint32_t Val);
+  inline void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, int Val) {
+    addModuleFlag(Behavior, Key, static_cast<uint32_t>(Val));
+  }
   void addModuleFlag(MDNode *Node);
   /// Like addModuleFlag but replaces the old module flag if it already exists.
   void setModuleFlag(ModFlagBehavior Behavior, StringRef Key, Metadata *Val);
   void setModuleFlag(ModFlagBehavior Behavior, StringRef Key, Constant *Val);
+  void setModuleFlag(ModFlagBehavior Behavior, StringRef Key, uint64_t Val);
   void setModuleFlag(ModFlagBehavior Behavior, StringRef Key, uint32_t Val);
+  inline void setModuleFlag(ModFlagBehavior Behavior, StringRef Key, int Val) {
+    setModuleFlag(Behavior, Key, static_cast<uint32_t>(Val));
+  }
 
   /// @}
   /// @name Materialization

diff  --git a/llvm/lib/IR/Module.cpp b/llvm/lib/IR/Module.cpp
index 34e44e26d5db5..a4a32613e6312 100644
--- a/llvm/lib/IR/Module.cpp
+++ b/llvm/lib/IR/Module.cpp
@@ -390,6 +390,11 @@ void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
                            Constant *Val) {
   addModuleFlag(Behavior, Key, ConstantAsMetadata::get(Val));
 }
+void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
+                           uint64_t Val) {
+  Type *Int64Ty = Type::getInt64Ty(Context);
+  addModuleFlag(Behavior, Key, ConstantInt::get(Int64Ty, Val));
+}
 void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
                            uint32_t Val) {
   Type *Int32Ty = Type::getInt32Ty(Context);
@@ -425,6 +430,11 @@ void Module::setModuleFlag(ModFlagBehavior Behavior, StringRef Key,
                            Constant *Val) {
   setModuleFlag(Behavior, Key, ConstantAsMetadata::get(Val));
 }
+void Module::setModuleFlag(ModFlagBehavior Behavior, StringRef Key,
+                           uint64_t Val) {
+  Type *Int64Ty = Type::getInt64Ty(Context);
+  setModuleFlag(Behavior, Key, ConstantInt::get(Int64Ty, Val));
+}
 void Module::setModuleFlag(ModFlagBehavior Behavior, StringRef Key,
                            uint32_t Val) {
   Type *Int32Ty = Type::getInt32Ty(Context);