test binemit
set opt_level=best
target x86_64

; Test that instruction shrinking eliminates REX prefixes when possible.

; The binary encodings can be verified with the command:
;
;   sed -ne 's/^ *; asm: *//p' filetests/isa/x86/shrink.cton | llvm-mc -show-encoding -triple=x86_64
;

function %test_shrinking(i32) -> i32 {
ebb0(v0: i32 [ %rdi ]):
           ; asm: movl $0x2,%eax
[-,%rcx]   v1 = iconst.i32 2     ; bin: b9 00000002
           ; asm: subl %ecx,%edi
[-,%rdi]   v2 = isub v0, v1      ; bin: 29 cf
           return v2
}

function %test_not_shrinking(i32) -> i32 {
ebb0(v0: i32 [ %r8 ]):
           ; asm: movl $0x2,%eax
[-,%rcx]   v1 = iconst.i32 2     ; bin: b9 00000002
           ; asm: subl %ecx,%edi
[-,%r8]    v2 = isub v0, v1      ; bin: 41 29 c8
           return v2
}