1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-bmi | FileCheck %s --check-prefix=ALL
3 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi | FileCheck %s --check-prefix=ALL
5 ; Clear high bits via shift, set them with xor (not), then mask them off.
7 define i32 @shrink_xor_constant1(i32 %x) {
8 ; ALL-LABEL: shrink_xor_constant1:
10 ; ALL-NEXT: movl %edi, %eax
12 ; ALL-NEXT: shrl $31, %eax
15 %not = xor i32 %sh, -1
16 %and = and i32 %not, 1
20 define <4 x i32> @shrink_xor_constant1_splat(<4 x i32> %x) {
21 ; ALL-LABEL: shrink_xor_constant1_splat:
23 ; ALL-NEXT: pcmpeqd %xmm1, %xmm1
24 ; ALL-NEXT: pxor %xmm1, %xmm0
25 ; ALL-NEXT: psrld $31, %xmm0
27 %sh = lshr <4 x i32> %x, <i32 31, i32 31, i32 31, i32 31>
28 %not = xor <4 x i32> %sh, <i32 -1, i32 -1, i32 -1, i32 -1>
29 %and = and <4 x i32> %not, <i32 1, i32 1, i32 1, i32 1>
33 ; Clear low bits via shift, set them with xor (not), then mask them off.
35 define i8 @shrink_xor_constant2(i8 %x) {
36 ; ALL-LABEL: shrink_xor_constant2:
38 ; ALL-NEXT: movl %edi, %eax
40 ; ALL-NEXT: shlb $5, %al
41 ; ALL-NEXT: # kill: def $al killed $al killed $eax
45 %and = and i8 %not, 224 ; 0xE0
49 define <16 x i8> @shrink_xor_constant2_splat(<16 x i8> %x) {
50 ; ALL-LABEL: shrink_xor_constant2_splat:
52 ; ALL-NEXT: movaps {{.*#+}} xmm0 = [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
54 %sh = shl <16 x i8> %x, <i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5, i8 5>
55 %not = xor <16 x i8> %sh, <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>
56 %and = and <16 x i8> %not, <i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1>