1; RUN: opt -passes=loop-versioning -S < %s | FileCheck %s 2target triple = "x86_64-unknown-linux-gnu" 3 4define void @fill(ptr %ls1.20, ptr %ls2.21, ptr %cse3.22) { 5; CHECK-LABEL: @fill( 6; CHECK-NEXT: bb1.lver.check: 7; CHECK-NEXT: [[LS1_20_PROMOTED:%.*]] = load ptr, ptr [[LS1_20:%.*]], align 8 8; CHECK-NEXT: [[LS2_21_PROMOTED:%.*]] = load ptr, ptr [[LS2_21:%.*]], align 8 9; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[LS1_20_PROMOTED]], i64 -1 10; CHECK-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[LS1_20_PROMOTED]], i64 1 11; CHECK-NEXT: [[SCEVGEP2:%.*]] = getelementptr i8, ptr [[LS2_21_PROMOTED]], i64 1 12; CHECK-NEXT: [[BOUND0:%.*]] = icmp ult ptr [[SCEVGEP]], [[SCEVGEP2]] 13; CHECK-NEXT: [[BOUND1:%.*]] = icmp ult ptr [[LS2_21_PROMOTED]], [[SCEVGEP1]] 14; CHECK-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]] 15; CHECK-NEXT: br i1 [[FOUND_CONFLICT]], label %bb1.ph.lver.orig, label %bb1.ph 16; CHECK: bb1.ph.lver.orig: 17; 18bb1.ph: 19 %ls1.20.promoted = load ptr, ptr %ls1.20 20 %ls2.21.promoted = load ptr, ptr %ls2.21 21 br label %bb1 22 23bb1: 24 %_tmp302 = phi ptr [ %ls2.21.promoted, %bb1.ph ], [ %_tmp30, %bb1 ] 25 %_tmp281 = phi ptr [ %ls1.20.promoted, %bb1.ph ], [ %_tmp28, %bb1 ] 26 %_tmp14 = getelementptr i8, ptr %_tmp281, i16 -1 27 %_tmp15 = load i8, ptr %_tmp14 28 %add = add i8 %_tmp15, 1 29 store i8 %add, ptr %_tmp281 30 store i8 %add, ptr %_tmp302 31 %_tmp28 = getelementptr i8, ptr %_tmp281, i16 1 32 %_tmp30 = getelementptr i8, ptr %_tmp302, i16 1 33 br i1 false, label %bb1, label %bb3.loopexit 34 35bb3.loopexit: 36 %_tmp30.lcssa = phi ptr [ %_tmp30, %bb1 ] 37 %_tmp15.lcssa = phi i8 [ %_tmp15, %bb1 ] 38 %_tmp28.lcssa = phi ptr [ %_tmp28, %bb1 ] 39 store ptr %_tmp28.lcssa, ptr %ls1.20 40 store i8 %_tmp15.lcssa, ptr %cse3.22 41 store ptr %_tmp30.lcssa, ptr %ls2.21 42 br label %bb3 43 44bb3: 45 ret void 46} 47 48define void @fill_no_null_opt(ptr %ls1.20, ptr %ls2.21, ptr %cse3.22) #0 { 49; CHECK-LABEL: @fill_no_null_opt( 50; CHECK-NEXT: bb1.lver.check: 51; CHECK-NEXT: [[LS1_20_PROMOTED:%.*]] = load ptr, ptr [[LS1_20:%.*]], align 8 52; CHECK-NEXT: [[LS2_21_PROMOTED:%.*]] = load ptr, ptr [[LS2_21:%.*]], align 8 53; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[LS1_20_PROMOTED]], i64 -1 54; CHECK-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[LS1_20_PROMOTED]], i64 1 55; CHECK-NEXT: [[SCEVGEP2:%.*]] = getelementptr i8, ptr [[LS2_21_PROMOTED]], i64 1 56; CHECK-NEXT: [[BOUND0:%.*]] = icmp ult ptr [[SCEVGEP]], [[SCEVGEP2]] 57; CHECK-NEXT: [[BOUND1:%.*]] = icmp ult ptr [[LS2_21_PROMOTED]], [[SCEVGEP1]] 58; CHECK-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]] 59; CHECK-NEXT: br i1 [[FOUND_CONFLICT]], label %bb1.ph.lver.orig, label %bb1.ph 60; CHECK: bb1.ph.lver.orig: 61; 62bb1.ph: 63 %ls1.20.promoted = load ptr, ptr %ls1.20 64 %ls2.21.promoted = load ptr, ptr %ls2.21 65 br label %bb1 66 67bb1: 68 %_tmp302 = phi ptr [ %ls2.21.promoted, %bb1.ph ], [ %_tmp30, %bb1 ] 69 %_tmp281 = phi ptr [ %ls1.20.promoted, %bb1.ph ], [ %_tmp28, %bb1 ] 70 %_tmp14 = getelementptr i8, ptr %_tmp281, i16 -1 71 %_tmp15 = load i8, ptr %_tmp14 72 %add = add i8 %_tmp15, 1 73 store i8 %add, ptr %_tmp281 74 store i8 %add, ptr %_tmp302 75 %_tmp28 = getelementptr i8, ptr %_tmp281, i16 1 76 %_tmp30 = getelementptr i8, ptr %_tmp302, i16 1 77 br i1 false, label %bb1, label %bb3.loopexit 78 79bb3.loopexit: 80 %_tmp30.lcssa = phi ptr [ %_tmp30, %bb1 ] 81 %_tmp15.lcssa = phi i8 [ %_tmp15, %bb1 ] 82 %_tmp28.lcssa = phi ptr [ %_tmp28, %bb1 ] 83 store ptr %_tmp28.lcssa, ptr %ls1.20 84 store i8 %_tmp15.lcssa, ptr %cse3.22 85 store ptr %_tmp30.lcssa, ptr %ls2.21 86 br label %bb3 87 88bb3: 89 ret void 90} 91 92attributes #0 = { null_pointer_is_valid } 93