1 files changed, 13 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fast-isel-tailcall.ll b/test/CodeGen/X86/fast-isel-tailcall.ll
new file mode 100644
index 000000000000..6f4d2026814f
--- /dev/null
+++ b/test/CodeGen/X86/fast-isel-tailcall.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | llc -fast-isel -tailcallopt -march=x86 | not grep add
+; PR4154
+
+; On x86, -tailcallopt changes the ABI so the caller shouldn't readjust
+; the stack pointer after the call in this code.
+
+define i32 @stub(i8* %t0) nounwind {
+entry:
+        %t1 = load i32* inttoptr (i32 139708680 to i32*)         ; <i32> [#uses=1]
+        %t2 = bitcast i8* %t0 to i32 (i32)*               ; <i32 (i32)*> [#uses=1]
+        %t3 = call fastcc i32 %t2(i32 %t1)         ; <i32> [#uses=1]
+        ret i32 %t3
+}