[clang] [llvm] [SystemZ][z/OS] This change adds support for the PPA2 section in zOS (PR #68926)

[Yusra Syeda via cfe-commits]

================
@@ -1026,6 +1030,78 @@ void SystemZAsmPrinter::emitADASection() {
   OutStreamer->popSection();
 }
 
+static uint32_t getProductVersion(Module &M) {
+  if (auto *VersionVal = cast_or_null<ConstantAsMetadata>(
+          M.getModuleFlag("zos_product_major_version")))
+    return cast<ConstantInt>(VersionVal->getValue())->getZExtValue();
+  return LLVM_VERSION_MAJOR;
+}
+
+static uint32_t getProductRelease(Module &M) {
+  if (auto *ReleaseVal = cast_or_null<ConstantAsMetadata>(
+          M.getModuleFlag("zos_product_minor_version")))
+    return cast<ConstantInt>(ReleaseVal->getValue())->getZExtValue();
+  return LLVM_VERSION_MINOR;
+}
+
+static uint32_t getProductPatch(Module &M) {
+  if (auto *PatchVal = cast_or_null<ConstantAsMetadata>(
+          M.getModuleFlag("zos_product_patchlevel")))
+    return cast<ConstantInt>(PatchVal->getValue())->getZExtValue();
+  return LLVM_VERSION_PATCH;
+}
+
+static time_t getTranslationTime(Module &M) {
+  std::time_t Time = 0;
+  if (auto *Val = cast_or_null<ConstantAsMetadata>(
+          M.getModuleFlag("zos_translation_time"))) {
+    long SecondsSinceEpoch = cast<ConstantInt>(Val->getValue())->getSExtValue();
+    Time = static_cast<time_t>(SecondsSinceEpoch);
+  }
+  return Time;
+}
+
+void SystemZAsmPrinter::emitIDRLSection(Module &M) {
+  OutStreamer->pushSection();
+  OutStreamer->switchSection(getObjFileLowering().getIDRLSection());
+  constexpr unsigned IDRLDataLength = 30;
+  std::time_t Time = getTranslationTime(M);
+
+  uint32_t ProductVersion = getProductVersion(M);
+  uint32_t ProductRelease = getProductRelease(M);
+
+  std::string ProductID;
+  if (auto *MD = M.getModuleFlag("zos_product_id"))
+    ProductID = cast<MDString>(MD)->getString().str();
+
+  if (ProductID.empty()) {
+    char ProductIDFormatted[11]; // 10 + null.
+    snprintf(ProductIDFormatted, sizeof(ProductIDFormatted), "LLVM  %02d%02d",
+             ProductVersion, ProductRelease);
+    ProductID = ProductIDFormatted;
+  }
+
+  // Remove - from Product Id, which makes it consistent with legacy.
+  // The binder expects alphanumeric characters only.
+  std::size_t DashFound = ProductID.find("-");
+  if (DashFound != std::string::npos)
+    ProductID.erase(ProductID.begin() + DashFound);
----------------
ysyeda wrote:

I tried changing the productID to an arbitrary string containing multiple dashes and non alphanumerics, and it does not cause issues in the binder. The original comment is wrong and the only need to remove the '-' is for the C/C++ compiler to match xlc/xlC. So this code can be removed from here.

https://github.com/llvm/llvm-project/pull/68926