From 4cae133780aa35b0f40f382286b2c0eb57369fee Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 5 Mar 2010 08:38:04 +0000
Subject: Fix an oops in x86 sibcall optimization. If the ByVal callee argument
 is itself passed as a pointer, then it's obviously not safe to do a tail
 call.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97797 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/tailcall2.ll | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'test')

diff --git a/test/CodeGen/X86/tailcall2.ll b/test/CodeGen/X86/tailcall2.ll
index 80bab61..90315fd 100644
--- a/test/CodeGen/X86/tailcall2.ll
+++ b/test/CodeGen/X86/tailcall2.ll
@@ -195,3 +195,24 @@ bb2:
 }
 
 declare i32 @foo6(i32, i32, %struct.t* byval align 4)
+
+; rdar://r7717598
+%struct.ns = type { i32, i32 }
+%struct.cp = type { float, float }
+
+define %struct.ns* @t13(%struct.cp* %yy) nounwind ssp {
+; 32: t13:
+; 32-NOT: jmp
+; 32: call
+; 32: ret
+
+; 64: t13:
+; 64-NOT: jmp
+; 64: call
+; 64: ret
+entry:
+  %0 = tail call fastcc %struct.ns* @foo7(%struct.cp* byval align 4 %yy, i8 signext 0) nounwind
+  ret %struct.ns* %0
+}
+
+declare fastcc %struct.ns* @foo7(%struct.cp* byval align 4, i8 signext) nounwind ssp
-- 
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