; RUN: llc < %s -march=x86 | grep movsbl define i32 @foo(i32 %X) nounwind { entry: %tmp12 = trunc i32 %X to i8 ; <i8> [#uses=1] %tmp123 = sext i8 %tmp12 to i32 ; <i32> [#uses=1] ret i32 %tmp123 }