; RUN: llc < %s -march=x86 | FileCheck %s -check-prefix=X32
-; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s -check-prefix=X64
-; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s -check-prefix=X64
+; RUN: llc < %s -mtriple=x86_64-linux -join-physregs | FileCheck %s -check-prefix=X64
+; RUN: llc < %s -mtriple=x86_64-win32 -join-physregs | FileCheck %s -check-prefix=X64
+
+; Some of these tests depend on -join-physregs to commute instructions.
; The immediate can be encoded in a smaller way if the
; instruction is a sub instead of an add.