From 1facdf2c6ffbb942e5d13d60ddb763cdb37c2991 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 30 Apr 2010 01:12:32 +0000
Subject: Another sibcall bug. If caller and callee calling conventions differ,
 then it's only safe to do a tail call if the results are returned in the same
 way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102683 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/sibcall.ll | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'test')

diff --git a/test/CodeGen/X86/sibcall.ll b/test/CodeGen/X86/sibcall.ll
index 8e52a7c..ff581ae 100644
--- a/test/CodeGen/X86/sibcall.ll
+++ b/test/CodeGen/X86/sibcall.ll
@@ -313,3 +313,21 @@ entry:
 }
 
 declare void @foo()
+
+; If caller / callee calling convention mismatch then check if the return
+; values are returned in the same registers.
+; rdar://7874780
+
+define double @t20(double %x) nounwind {
+entry:
+; 32: t20:
+; 32: call {{_?}}foo20
+; 32: fldl (%esp)
+
+; 64: t20:
+; 64: jmp {{_?}}foo20
+  %0 = tail call fastcc double @foo20(double %x) nounwind
+  ret double %0
+}
+
+declare fastcc double @foo20(double) nounwind
-- 
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