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1; RUN: opt -passes='hardware-loops<force-hardware-loops>' -S %s -o - | FileCheck %s --check-prefix=CHECK2; RUN: opt -passes='hardware-loops<force-hardware-loops;hardware-loop-decrement=1>' -S %s -o - | FileCheck %s --check-prefix=CHECK3; RUN: opt -passes='hardware-loops<force-hardware-loops;hardware-loop-counter-bitwidth=32>' -S %s -o - | FileCheck %s --check-prefix=CHECK4 5define void @while_lt(i32 %i, i32 %N, ptr nocapture %A) {6; CHECK-LABEL: @while_lt(7; CHECK-NEXT: entry:8; CHECK-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]9; CHECK-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]10; CHECK: while.body.preheader:11; CHECK-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]12; CHECK-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])13; CHECK-NEXT: br label [[WHILE_BODY:%.*]]14; CHECK: while.body:15; CHECK-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]16; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i32 [[I_ADDR_05]]17; CHECK-NEXT: store i32 [[I_ADDR_05]], ptr [[ARRAYIDX]], align 418; CHECK-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 119; CHECK-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)20; CHECK-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]21; CHECK: while.end:22; CHECK-NEXT: ret void23entry:24 %cmp4 = icmp ult i32 %i, %N25 br i1 %cmp4, label %while.body, label %while.end26 27while.body:28 %i.addr.05 = phi i32 [ %inc, %while.body ], [ %i, %entry ]29 %arrayidx = getelementptr inbounds i32, ptr %A, i32 %i.addr.0530 store i32 %i.addr.05, ptr %arrayidx, align 431 %inc = add nuw i32 %i.addr.05, 132 %exitcond = icmp eq i32 %inc, %N33 br i1 %exitcond, label %while.end, label %while.body34 35while.end:36 ret void37}38