Enable the tail call optimization when the caller returns undef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88737 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/tailcall1.ll b/test/CodeGen/X86/tailcall1.ll
index 215d009..4923df2 100644
--- a/test/CodeGen/X86/tailcall1.ll
+++ b/test/CodeGen/X86/tailcall1.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=x86 -tailcallopt | grep TAILCALL | count 3
+; RUN: llc < %s -march=x86 -tailcallopt | grep TAILCALL | count 4
define fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
entry:
ret i32 %a3
@@ -23,3 +23,10 @@
%p = tail call fastcc noalias i8* @noalias_callee()
ret i8* %p
}
+
+declare fastcc i32 @i32_callee()
+
+define fastcc i32 @ret_undef() nounwind {
+ %p = tail call fastcc i32 @i32_callee()
+ ret i32 undef
+}