commit d155d7e428e0e14b520dddbf00b6745d7eb2d7b8
author Dale Johannesen <dalej@apple.com> Mon Oct 25 22:17:05 2010 +0000
committer Dale Johannesen <dalej@apple.com> Mon Oct 25 22:17:05 2010 +0000
tree 6f16ff18803a4f05279dcf0ac14a217f03cdf838
parent 87c5c2f069fe18df5a372e6eb7bbca3be4d09fac

An stdcall function calling a non-stdcall function
cannot use tailcall.  PR 8461.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117322 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index ca812c8..f698cec 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2532,6 +2532,11 @@
     }
   }
 
+  // An stdcall caller is expected to clean up its arguments; the callee
+  // isn't going to do that.   PR 8461.
+  if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
+    return false;
+
   return true;
 }