Prevent inlining of callees which allocate lots of memory into a recursive caller.

Example:

void foo() {
 ... foo();   // I'm recursive!

  bar();
}

bar() {  int a[1000];  // large stack size }

rdar://10853263



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164207 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/include/llvm/Analysis/InlineCost.h b/include/llvm/Analysis/InlineCost.h
index 0cba135222..f8de533506 100644
--- a/include/llvm/Analysis/InlineCost.h
+++ b/include/llvm/Analysis/InlineCost.h
@@ -36,6 +36,9 @@ namespace llvm {
     const int LastCallToStaticBonus = -15000;
     const int ColdccPenalty = 2000;
     const int NoreturnPenalty = 10000;
+    /// Do not inline functions which allocate this many bytes on the stack
+    /// when the caller is recursive.
+    const int TotalAllocaSizeRecursiveCaller = 1024;
   }
 
   /// \brief Represents the cost of inlining a function.