1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -loop-reduce -S < %s | FileCheck %s 3 4target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128" 5 6define i32 @test(i32 %c, ptr %a, ptr %b) { 7; CHECK-LABEL: @test( 8; CHECK-NEXT: entry: 9; CHECK-NEXT: [[CMP13:%.*]] = icmp sgt i32 [[C:%.*]], 0 10; CHECK-NEXT: br i1 [[CMP13]], label [[FOR_BODY_PREHEADER:%.*]], label [[RETURN:%.*]] 11; CHECK: for.body.preheader: 12; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[C]] to i64 13; CHECK-NEXT: br label [[FOR_BODY:%.*]] 14; CHECK: for.cond: 15; CHECK-NEXT: [[UGLYGEP:%.*]] = getelementptr i8, ptr [[LSR_IV:%.*]], i64 4 16; CHECK-NEXT: [[LSR_IV_NEXT:%.*]] = add nsw i64 [[LSR_IV1:%.*]], -1 17; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[LSR_IV_NEXT]], 0 18; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[RETURN_LOOPEXIT:%.*]], label [[FOR_BODY]] 19; CHECK: for.body: 20; CHECK-NEXT: [[LSR_IV1]] = phi i64 [ [[LSR_IV_NEXT]], [[FOR_COND:%.*]] ], [ [[WIDE_TRIP_COUNT]], [[FOR_BODY_PREHEADER]] ] 21; CHECK-NEXT: [[LSR_IV]] = phi ptr [ [[UGLYGEP]], [[FOR_COND]] ], [ [[A:%.*]], [[FOR_BODY_PREHEADER]] ] 22; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[LSR_IV]], align 4 23; CHECK-NEXT: [[TOBOOL3_NOT:%.*]] = icmp eq i32 [[VAL]], 0 24; CHECK-NEXT: br i1 [[TOBOOL3_NOT]], label [[FOR_COND]], label [[RETURN_LOOPEXIT]] 25; CHECK: return.loopexit: 26; CHECK-NEXT: [[RETVAL_1_PH:%.*]] = phi i32 [ 1, [[FOR_BODY]] ], [ 0, [[FOR_COND]] ] 27; CHECK-NEXT: br label [[RETURN]] 28; CHECK: return: 29; CHECK-NEXT: [[RETVAL_1:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[RETVAL_1_PH]], [[RETURN_LOOPEXIT]] ] 30; CHECK-NEXT: ret i32 [[RETVAL_1]] 31; 32entry: 33 %cmp13 = icmp sgt i32 %c, 0 34 br i1 %cmp13, label %for.body.preheader, label %return 35 36for.body.preheader: ; preds = %entry 37 %wide.trip.count = zext i32 %c to i64 38 br label %for.body 39 40for.cond: ; preds = %for.body 41 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 42 %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count 43 br i1 %exitcond.not, label %return, label %for.body 44 45for.body: ; preds = %for.body.preheader, %for.cond 46 %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.cond ] 47 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv 48 %val = load i32, ptr %arrayidx, align 4 49 %tobool3.not = icmp eq i32 %val, 0 50 br i1 %tobool3.not, label %for.cond, label %return 51 52return: ; preds = %for.cond, %for.body, %entry 53 %retval.1 = phi i32 [ 0, %entry ], [ 0, %for.cond ], [ 1, %for.body ] 54 ret i32 %retval.1 55} 56