1 files changed, 40 insertions, 0 deletions
diff --git a/test/CodeGen/X86/tailcall-disable.ll b/test/CodeGen/X86/tailcall-disable.ll
new file mode 100644
index 0000000..b628f5e
--- /dev/null
+++ b/test/CodeGen/X86/tailcall-disable.ll
@@ -0,0 +1,40 @@
+; RUN: llc -disable-tail-calls < %s | FileCheck --check-prefix=CALL %s
+; RUN: llc < %s | FileCheck --check-prefix=JMP %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @helper() nounwind {
+entry:
+  ret i32 7
+}
+
+define i32 @test1() nounwind {
+entry:
+  %call = tail call i32 @helper()
+  ret i32 %call
+}
+
+; CALL: test1:
+; CALL-NOT: ret
+; CALL: callq helper
+; CALL: ret
+
+; JMP: test1:
+; JMP-NOT: ret
+; JMP: jmp helper # TAILCALL
+
+define i32 @test2() nounwind {
+entry:
+  %call = tail call i32 @test2()
+  ret i32 %call
+}
+
+; CALL: test2:
+; CALL-NOT: ret
+; CALL: callq test2
+; CALL: ret
+
+; JMP: test2:
+; JMP-NOT: ret
+; JMP: jmp test2 # TAILCALL