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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-bmi | FileCheck %s --check-prefix=ALL3; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi | FileCheck %s --check-prefix=ALL4 5; Clear high bits via shift, set them with xor (not), then mask them off.6 7define i32 @shrink_xor_constant1(i32 %x) {8; ALL-LABEL: shrink_xor_constant1:9; ALL: # %bb.0:10; ALL-NEXT: movl %edi, %eax11; ALL-NEXT: notl %eax12; ALL-NEXT: shrl $31, %eax13; ALL-NEXT: retq14 %sh = lshr i32 %x, 3115 %not = xor i32 %sh, -116 %and = and i32 %not, 117 ret i32 %and18}19 20define <4 x i32> @shrink_xor_constant1_splat(<4 x i32> %x) {21; ALL-LABEL: shrink_xor_constant1_splat:22; ALL: # %bb.0:23; ALL-NEXT: pcmpeqd %xmm1, %xmm124; ALL-NEXT: pxor %xmm1, %xmm025; ALL-NEXT: psrld $31, %xmm026; ALL-NEXT: retq27 %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>30 ret <4 x i32> %and31}32 33; Clear low bits via shift, set them with xor (not), then mask them off.34 35define i8 @shrink_xor_constant2(i8 %x) {36; ALL-LABEL: shrink_xor_constant2:37; ALL: # %bb.0:38; ALL-NEXT: movl %edi, %eax39; ALL-NEXT: notb %al40; ALL-NEXT: shlb $5, %al41; ALL-NEXT: # kill: def $al killed $al killed $eax42; ALL-NEXT: retq43 %sh = shl i8 %x, 544 %not = xor i8 %sh, -145 %and = and i8 %not, 224 ; 0xE046 ret i8 %and47}48 49define <16 x i8> @shrink_xor_constant2_splat(<16 x i8> %x) {50; ALL-LABEL: shrink_xor_constant2_splat:51; ALL: # %bb.0:52; ALL-NEXT: movaps {{.*#+}} xmm0 = [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]53; ALL-NEXT: retq54 %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>57 ret <16 x i8> %and58}59 60