From 8ace12130526f450c822ca232d1f865b247d7434 Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers@google.com>
Date: Mon, 21 Jun 2021 15:09:23 -0700
Subject: [IR] convert warn-stack-size from module flag to fn attr

Otherwise, this causes issues when building with LTO for object files
that use different values.

Link: https://github.com/ClangBuiltLinux/linux/issues/1395

Reviewed By: dblaikie, MaskRay

Differential Revision: https://reviews.llvm.org/D104342
---
 clang/lib/CodeGen/CodeGenFunction.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'clang/lib/CodeGen/CodeGenFunction.cpp')

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 97288d0..0ca9465 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -1053,6 +1053,10 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
     Fn->addFnAttr("packed-stack");
   }
 
+  if (CGM.getCodeGenOpts().WarnStackSize != UINT_MAX)
+    Fn->addFnAttr("warn-stack-size",
+                  std::to_string(CGM.getCodeGenOpts().WarnStackSize));
+
   if (RetTy->isVoidType()) {
     // Void type; nothing to return.
     ReturnValue = Address::invalid();
-- 
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