[CXX_FAST_TLS] Disable tail call when calling conventions are mismatched.
Since CXX_FAST_TLS has a bigger set of CSRs, we don't tail call when caller
and callee have mismatched calling conventions.
llvm-svn: 263856
diff --git a/llvm/test/CodeGen/AArch64/cxx-tlscc.ll b/llvm/test/CodeGen/AArch64/cxx-tlscc.ll
index 9219132..16d1d95 100644
--- a/llvm/test/CodeGen/AArch64/cxx-tlscc.ll
+++ b/llvm/test/CodeGen/AArch64/cxx-tlscc.ll
@@ -205,5 +205,18 @@
call cxx_fast_tlscc void @tls_helper()
ret %class.C* @tC
}
+
+; Make sure we do not allow tail call when caller and callee have different
+; calling conventions.
+declare %class.C* @_ZN1CD1Ev(%class.C* readnone returned %this)
+; CHECK-LABEL: tls_test
+; CHECK: bl __tlv_atexit
+define cxx_fast_tlscc void @__tls_test() {
+entry:
+ store i32 0, i32* getelementptr inbounds (%class.C, %class.C* @tC, i64 0, i32 0), align 4
+ %0 = tail call i32 @_tlv_atexit(void (i8*)* bitcast (%class.C* (%class.C*)* @_ZN1CD1Ev to void (i8*)*), i8* bitcast (%class.C* @tC to i8*), i8* nonnull @__dso_handle) #1
+ ret void
+}
+
attributes #0 = { nounwind "no-frame-pointer-elim"="true" }
attributes #1 = { nounwind }