[AArch64] Simplify BTI/PAC-RET module flags

These module flags use the Min merge behavior with a default value of
zero, so we don't need to emit them if zero.

Reviewed By: danielkiss

Differential Revision: https://reviews.llvm.org/D130145

1 files changed, 11 insertions, 12 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 29713a5..918425b 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -795,18 +795,17 @@ void CodeGenModule::Release() {
       Arch == llvm::Triple::arm || Arch == llvm::Triple::armeb ||
       Arch == llvm::Triple::aarch64 || Arch == llvm::Triple::aarch64_32 ||
       Arch == llvm::Triple::aarch64_be) {
-    getModule().addModuleFlag(llvm::Module::Min, "branch-target-enforcement",
-                              LangOpts.BranchTargetEnforcement);
-
-    getModule().addModuleFlag(llvm::Module::Min, "sign-return-address",
-                              LangOpts.hasSignReturnAddress());
-
-    getModule().addModuleFlag(llvm::Module::Min, "sign-return-address-all",
-                              LangOpts.isSignReturnAddressScopeAll());
-
-    getModule().addModuleFlag(llvm::Module::Min,
-                              "sign-return-address-with-bkey",
-                              !LangOpts.isSignReturnAddressWithAKey());
+    if (LangOpts.BranchTargetEnforcement)
+      getModule().addModuleFlag(llvm::Module::Min, "branch-target-enforcement",
+                                1);
+    if (LangOpts.hasSignReturnAddress())
+      getModule().addModuleFlag(llvm::Module::Min, "sign-return-address", 1);
+    if (LangOpts.isSignReturnAddressScopeAll())
+      getModule().addModuleFlag(llvm::Module::Min, "sign-return-address-all",
+                                1);
+    if (!LangOpts.isSignReturnAddressWithAKey())
+      getModule().addModuleFlag(llvm::Module::Min,
+                                "sign-return-address-with-bkey", 1);
   }
 
   if (!CodeGenOpts.MemoryProfileOutput.empty()) {