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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=instcombine -S | FileCheck %s3 4; These patterns are all just traditional clamp pattern.5; But they are not canonical, the and/or/xor is more canonically represented6; as an add+icmp.7 8define i32 @t0_select_cond_and_v0(i32 %X) {9; CHECK-LABEL: @t0_select_cond_and_v0(10; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)11; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)12; CHECK-NEXT: ret i32 [[R]]13;14 %dont_need_to_clamp_positive = icmp sle i32 %X, 3276715 %dont_need_to_clamp_negative = icmp sge i32 %X, -3276816 %clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 3276717 %dont_need_to_clamp = and i1 %dont_need_to_clamp_positive, %dont_need_to_clamp_negative18 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit19 ret i32 %R20}21 22define i32 @t0_select_cond_and_v0_logical(i32 %X) {23; CHECK-LABEL: @t0_select_cond_and_v0_logical(24; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)25; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)26; CHECK-NEXT: ret i32 [[R]]27;28 %dont_need_to_clamp_positive = icmp sle i32 %X, 3276729 %dont_need_to_clamp_negative = icmp sge i32 %X, -3276830 %clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 3276731 %dont_need_to_clamp = select i1 %dont_need_to_clamp_positive, i1 %dont_need_to_clamp_negative, i1 false32 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit33 ret i32 %R34}35define i32 @t1_select_cond_and_v1(i32 %X) {36; CHECK-LABEL: @t1_select_cond_and_v1(37; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)38; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)39; CHECK-NEXT: ret i32 [[R]]40;41 %dont_need_to_clamp_positive = icmp sle i32 %X, 3276742 %dont_need_to_clamp_negative = icmp sge i32 %X, -3276843 %clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -3276844 %dont_need_to_clamp = and i1 %dont_need_to_clamp_positive, %dont_need_to_clamp_negative45 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit46 ret i32 %R47}48 49define i32 @t1_select_cond_and_v1_logical(i32 %X) {50; CHECK-LABEL: @t1_select_cond_and_v1_logical(51; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)52; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)53; CHECK-NEXT: ret i32 [[R]]54;55 %dont_need_to_clamp_positive = icmp sle i32 %X, 3276756 %dont_need_to_clamp_negative = icmp sge i32 %X, -3276857 %clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -3276858 %dont_need_to_clamp = select i1 %dont_need_to_clamp_positive, i1 %dont_need_to_clamp_negative, i1 false59 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit60 ret i32 %R61}62 63;-------------------------------------------------------------------------------64 65define i32 @t2_select_cond_or_v0(i32 %X) {66; CHECK-LABEL: @t2_select_cond_or_v0(67; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)68; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)69; CHECK-NEXT: ret i32 [[R]]70;71 %need_to_clamp_positive = icmp sgt i32 %X, 3276772 %need_to_clamp_negative = icmp slt i32 %X, -3276873 %clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -3276874 %need_to_clamp = or i1 %need_to_clamp_positive, %need_to_clamp_negative75 %R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X76 ret i32 %R77}78 79define i32 @t2_select_cond_or_v0_logical(i32 %X) {80; CHECK-LABEL: @t2_select_cond_or_v0_logical(81; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)82; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)83; CHECK-NEXT: ret i32 [[R]]84;85 %need_to_clamp_positive = icmp sgt i32 %X, 3276786 %need_to_clamp_negative = icmp slt i32 %X, -3276887 %clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -3276888 %need_to_clamp = select i1 %need_to_clamp_positive, i1 true, i1 %need_to_clamp_negative89 %R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X90 ret i32 %R91}92define i32 @t3_select_cond_or_v1(i32 %X) {93; CHECK-LABEL: @t3_select_cond_or_v1(94; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)95; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)96; CHECK-NEXT: ret i32 [[R]]97;98 %need_to_clamp_positive = icmp sgt i32 %X, 3276799 %need_to_clamp_negative = icmp slt i32 %X, -32768100 %clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767101 %need_to_clamp = or i1 %need_to_clamp_positive, %need_to_clamp_negative102 %R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X103 ret i32 %R104}105 106define i32 @t3_select_cond_or_v1_logical(i32 %X) {107; CHECK-LABEL: @t3_select_cond_or_v1_logical(108; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)109; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)110; CHECK-NEXT: ret i32 [[R]]111;112 %need_to_clamp_positive = icmp sgt i32 %X, 32767113 %need_to_clamp_negative = icmp slt i32 %X, -32768114 %clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767115 %need_to_clamp = select i1 %need_to_clamp_positive, i1 true, i1 %need_to_clamp_negative116 %R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X117 ret i32 %R118}119 120;-------------------------------------------------------------------------------121 122define i32 @t4_select_cond_xor_v0(i32 %X) {123; CHECK-LABEL: @t4_select_cond_xor_v0(124; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)125; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)126; CHECK-NEXT: ret i32 [[R]]127;128 %need_to_clamp_positive = icmp sgt i32 %X, 32767129 %dont_need_to_clamp_negative = icmp sgt i32 %X, -32768130 %clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -32768131 %dont_need_to_clamp = xor i1 %need_to_clamp_positive, %dont_need_to_clamp_negative132 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit133 ret i32 %R134}135define i32 @t4_select_cond_xor_v1(i32 %X) {136; CHECK-LABEL: @t4_select_cond_xor_v1(137; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)138; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)139; CHECK-NEXT: ret i32 [[R]]140;141 %need_to_clamp_positive = icmp sgt i32 %X, 32767142 %dont_need_to_clamp_negative = icmp sgt i32 %X, -32768143 %clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -32768144 %dont_need_to_clamp = xor i1 %need_to_clamp_positive, %dont_need_to_clamp_negative145 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit146 ret i32 %R147}148 149define i32 @t5_select_cond_xor_v2(i32 %X) {150; CHECK-LABEL: @t5_select_cond_xor_v2(151; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)152; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)153; CHECK-NEXT: ret i32 [[R]]154;155 %dont_need_to_clamp_positive = icmp sle i32 %X, 32767156 %need_to_clamp_negative = icmp sle i32 %X, -32768157 %clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767158 %dont_need_to_clamp = xor i1 %dont_need_to_clamp_positive, %need_to_clamp_negative159 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit160 ret i32 %R161}162define i32 @t5_select_cond_xor_v3(i32 %X) {163; CHECK-LABEL: @t5_select_cond_xor_v3(164; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -32768)165; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 32767)166; CHECK-NEXT: ret i32 [[R]]167;168 %dont_need_to_clamp_positive = icmp sle i32 %X, 32767169 %need_to_clamp_negative = icmp sle i32 %X, -32768170 %clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 32767171 %dont_need_to_clamp = xor i1 %dont_need_to_clamp_positive, %need_to_clamp_negative172 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit173 ret i32 %R174}175