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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=aggressive-instcombine -S | FileCheck %s3 4define i16 @trunc_phi(i8 %x) {5; CHECK-LABEL: @trunc_phi(6; CHECK-NEXT: LoopHeader:7; CHECK-NEXT: [[ZEXT:%.*]] = zext i8 [[X:%.*]] to i168; CHECK-NEXT: br label [[LOOP:%.*]]9; CHECK: Loop:10; CHECK-NEXT: [[ZEXT2:%.*]] = phi i16 [ [[ZEXT]], [[LOOPHEADER:%.*]] ], [ [[SHL:%.*]], [[LOOP]] ]11; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[LOOPHEADER]] ], [ [[I:%.*]], [[LOOP]] ]12; CHECK-NEXT: [[SHL]] = shl i16 [[ZEXT2]], 113; CHECK-NEXT: [[I]] = add i32 [[J]], 114; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[I]], 1015; CHECK-NEXT: br i1 [[CMP]], label [[LOOPEND:%.*]], label [[LOOP]]16; CHECK: LoopEnd:17; CHECK-NEXT: ret i16 [[SHL]]18;19LoopHeader:20 %zext = zext i8 %x to i3221 br label %Loop22 23Loop:24 %zext2 = phi i32 [%zext, %LoopHeader], [%shl, %Loop]25 %j = phi i32 [0, %LoopHeader], [%i, %Loop]26 %shl = shl i32 %zext2, 127 %trunc = trunc i32 %shl to i1628 %i = add i32 %j, 129 %cmp = icmp eq i32 %i, 1030 br i1 %cmp, label %LoopEnd, label %Loop31 32LoopEnd:33 ret i16 %trunc34}35 36define i16 @trunc_phi2(i8 %x, i32 %sw) {37; CHECK-LABEL: @trunc_phi2(38; CHECK-NEXT: LoopHeader:39; CHECK-NEXT: [[ZEXT:%.*]] = zext i8 [[X:%.*]] to i1640; CHECK-NEXT: switch i32 [[SW:%.*]], label [[LOOPEND:%.*]] [41; CHECK-NEXT: i32 0, label [[LOOP:%.*]]42; CHECK-NEXT: i32 1, label [[LOOP]]43; CHECK-NEXT: ]44; CHECK: Loop:45; CHECK-NEXT: [[ZEXT2:%.*]] = phi i16 [ [[ZEXT]], [[LOOPHEADER:%.*]] ], [ [[ZEXT]], [[LOOPHEADER]] ], [ [[SHL:%.*]], [[LOOP]] ]46; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[LOOPHEADER]] ], [ 0, [[LOOPHEADER]] ], [ [[I:%.*]], [[LOOP]] ]47; CHECK-NEXT: [[SHL]] = shl i16 [[ZEXT2]], 148; CHECK-NEXT: [[I]] = add i32 [[J]], 149; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[I]], 1050; CHECK-NEXT: br i1 [[CMP]], label [[LOOPEND]], label [[LOOP]]51; CHECK: LoopEnd:52; CHECK-NEXT: [[ZEXT3:%.*]] = phi i16 [ [[ZEXT]], [[LOOPHEADER]] ], [ [[ZEXT2]], [[LOOP]] ]53; CHECK-NEXT: ret i16 [[ZEXT3]]54;55LoopHeader:56 %zext = zext i8 %x to i3257 switch i32 %sw, label %LoopEnd [ i32 0, label %Loop58 i32 1, label %Loop ]59 60Loop:61 %zext2 = phi i32 [%zext, %LoopHeader], [%zext, %LoopHeader], [%shl, %Loop]62 %j = phi i32 [0, %LoopHeader], [0, %LoopHeader], [%i, %Loop]63 %shl = shl i32 %zext2, 164 %i = add i32 %j, 165 %cmp = icmp eq i32 %i, 1066 br i1 %cmp, label %LoopEnd, label %Loop67 68LoopEnd:69 %zext3 = phi i32 [%zext, %LoopHeader], [%zext2, %Loop]70 %trunc = trunc i32 %zext3 to i1671 ret i16 %trunc72}73