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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; Should fold5; (%x + %y) u< %x6; or7; (%x + %y) u< %y8; to9; @llvm.uadd.with.overflow(%x, %y) + extractvalue10;11; All tests here have extra uses, to ensure that the pattern isn't perturbed.12 13declare void @use8(i8)14declare void @use2x8(<2 x i8>)15 16define i1 @t0_basic(i8 %x, i8 %y) {17; CHECK-LABEL: @t0_basic(18; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]19; CHECK-NEXT: call void @use8(i8 [[T0]])20; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[T0]], [[Y]]21; CHECK-NEXT: ret i1 [[R]]22;23 %t0 = add i8 %x, %y24 call void @use8(i8 %t0)25 %r = icmp ult i8 %t0, %y26 ret i1 %r27}28 29define <2 x i1> @t1_vec(<2 x i8> %x, <2 x i8> %y) {30; CHECK-LABEL: @t1_vec(31; CHECK-NEXT: [[T0:%.*]] = add <2 x i8> [[X:%.*]], [[Y:%.*]]32; CHECK-NEXT: call void @use2x8(<2 x i8> [[T0]])33; CHECK-NEXT: [[R:%.*]] = icmp ult <2 x i8> [[T0]], [[Y]]34; CHECK-NEXT: ret <2 x i1> [[R]]35;36 %t0 = add <2 x i8> %x, %y37 call void @use2x8(<2 x i8> %t0)38 %r = icmp ult <2 x i8> %t0, %y39 ret <2 x i1> %r40}41 42; Commutativity43 44define i1 @t2_symmetry(i8 %x, i8 %y) {45; CHECK-LABEL: @t2_symmetry(46; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]47; CHECK-NEXT: call void @use8(i8 [[T0]])48; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[T0]], [[X]]49; CHECK-NEXT: ret i1 [[R]]50;51 %t0 = add i8 %x, %y52 call void @use8(i8 %t0)53 %r = icmp ult i8 %t0, %x ; can check against either of `add` arguments54 ret i1 %r55}56 57declare i8 @gen8()58 59define i1 @t3_commutative(i8 %x) {60; CHECK-LABEL: @t3_commutative(61; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8()62; CHECK-NEXT: [[T0:%.*]] = add i8 [[Y]], [[X:%.*]]63; CHECK-NEXT: call void @use8(i8 [[T0]])64; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[T0]], [[Y]]65; CHECK-NEXT: ret i1 [[R]]66;67 %y = call i8 @gen8()68 %t0 = add i8 %y, %x ; swapped69 call void @use8(i8 %t0)70 %r = icmp ult i8 %t0, %y71 ret i1 %r72}73 74define i1 @t4_commutative(i8 %x, i8 %y) {75; CHECK-LABEL: @t4_commutative(76; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]77; CHECK-NEXT: call void @use8(i8 [[T0]])78; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[Y]], [[T0]]79; CHECK-NEXT: ret i1 [[R]]80;81 %t0 = add i8 %x, %y82 call void @use8(i8 %t0)83 %r = icmp ugt i8 %y, %t0 ; swapped84 ret i1 %r85}86 87define i1 @t5_commutative(i8 %x) {88; CHECK-LABEL: @t5_commutative(89; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8()90; CHECK-NEXT: [[T0:%.*]] = add i8 [[Y]], [[X:%.*]]91; CHECK-NEXT: call void @use8(i8 [[T0]])92; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[Y]], [[T0]]93; CHECK-NEXT: ret i1 [[R]]94;95 %y = call i8 @gen8()96 %t0 = add i8 %y, %x ; swapped97 call void @use8(i8 %t0)98 %r = icmp ugt i8 %y, %t0 ; swapped99 ret i1 %r100}101 102; Extra-use tests103 104define i1 @t6_no_extrause(i8 %x, i8 %y) {105; CHECK-LABEL: @t6_no_extrause(106; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1107; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[X:%.*]], [[TMP1]]108; CHECK-NEXT: ret i1 [[R]]109;110 %t0 = add i8 %x, %y111 %r = icmp ult i8 %t0, %y112 ret i1 %r113}114 115; Negative tests116 117define i1 @n7_different_y(i8 %x, i8 %y0, i8 %y1) {118; CHECK-LABEL: @n7_different_y(119; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y0:%.*]]120; CHECK-NEXT: call void @use8(i8 [[T0]])121; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[T0]], [[Y1:%.*]]122; CHECK-NEXT: ret i1 [[R]]123;124 %t0 = add i8 %x, %y0125 call void @use8(i8 %t0)126 %r = icmp ult i8 %t0, %y1127 ret i1 %r128}129 130define i1 @n8_wrong_pred0(i8 %x, i8 %y) {131; CHECK-LABEL: @n8_wrong_pred0(132; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]133; CHECK-NEXT: call void @use8(i8 [[T0]])134; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[T0]], [[Y]]135; CHECK-NEXT: ret i1 [[R]]136;137 %t0 = add i8 %x, %y138 call void @use8(i8 %t0)139 %r = icmp ule i8 %t0, %y140 ret i1 %r141}142 143define i1 @n9_wrong_pred1(i8 %x, i8 %y) {144; CHECK-LABEL: @n9_wrong_pred1(145; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]146; CHECK-NEXT: call void @use8(i8 [[T0]])147; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[T0]], [[Y]]148; CHECK-NEXT: ret i1 [[R]]149;150 %t0 = add i8 %x, %y151 call void @use8(i8 %t0)152 %r = icmp ugt i8 %t0, %y153 ret i1 %r154}155 156define i1 @n10_wrong_pred2(i8 %x, i8 %y) {157; CHECK-LABEL: @n10_wrong_pred2(158; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]159; CHECK-NEXT: call void @use8(i8 [[T0]])160; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[X]], 0161; CHECK-NEXT: ret i1 [[R]]162;163 %t0 = add i8 %x, %y164 call void @use8(i8 %t0)165 %r = icmp eq i8 %t0, %y166 ret i1 %r167}168 169define i1 @n11_wrong_pred3(i8 %x, i8 %y) {170; CHECK-LABEL: @n11_wrong_pred3(171; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]172; CHECK-NEXT: call void @use8(i8 [[T0]])173; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X]], 0174; CHECK-NEXT: ret i1 [[R]]175;176 %t0 = add i8 %x, %y177 call void @use8(i8 %t0)178 %r = icmp ne i8 %t0, %y179 ret i1 %r180}181 182define i1 @n12_wrong_pred4(i8 %x, i8 %y) {183; CHECK-LABEL: @n12_wrong_pred4(184; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]185; CHECK-NEXT: call void @use8(i8 [[T0]])186; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T0]], [[Y]]187; CHECK-NEXT: ret i1 [[R]]188;189 %t0 = add i8 %x, %y190 call void @use8(i8 %t0)191 %r = icmp slt i8 %t0, %y192 ret i1 %r193}194 195define i1 @n13_wrong_pred5(i8 %x, i8 %y) {196; CHECK-LABEL: @n13_wrong_pred5(197; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]198; CHECK-NEXT: call void @use8(i8 [[T0]])199; CHECK-NEXT: [[R:%.*]] = icmp sle i8 [[T0]], [[Y]]200; CHECK-NEXT: ret i1 [[R]]201;202 %t0 = add i8 %x, %y203 call void @use8(i8 %t0)204 %r = icmp sle i8 %t0, %y205 ret i1 %r206}207 208define i1 @n14_wrong_pred6(i8 %x, i8 %y) {209; CHECK-LABEL: @n14_wrong_pred6(210; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]211; CHECK-NEXT: call void @use8(i8 [[T0]])212; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T0]], [[Y]]213; CHECK-NEXT: ret i1 [[R]]214;215 %t0 = add i8 %x, %y216 call void @use8(i8 %t0)217 %r = icmp sgt i8 %t0, %y218 ret i1 %r219}220 221define i1 @n15_wrong_pred7(i8 %x, i8 %y) {222; CHECK-LABEL: @n15_wrong_pred7(223; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]224; CHECK-NEXT: call void @use8(i8 [[T0]])225; CHECK-NEXT: [[R:%.*]] = icmp sge i8 [[T0]], [[Y]]226; CHECK-NEXT: ret i1 [[R]]227;228 %t0 = add i8 %x, %y229 call void @use8(i8 %t0)230 %r = icmp sge i8 %t0, %y231 ret i1 %r232}233