1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=loop-idiom -S %s | FileCheck %s 3 4define void @reuse_cast_1(ptr %ptr, i1 %c) { 5; CHECK-LABEL: @reuse_cast_1( 6; CHECK-NEXT: entry: 7; CHECK-NEXT: br label [[LOOP_0:%.*]] 8; CHECK: loop.0: 9; CHECK-NEXT: [[TMP:%.*]] = load ptr, ptr [[PTR:%.*]], align 8 10; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP_2_PREHEADER:%.*]], label [[LOOP_1_PREHEADER:%.*]] 11; CHECK: loop.1.preheader: 12; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[TMP]], i8 0, i64 400, i1 false) 13; CHECK-NEXT: br label [[LOOP_1:%.*]] 14; CHECK: loop.2.preheader: 15; CHECK-NEXT: br label [[LOOP_2:%.*]] 16; CHECK: loop.1: 17; CHECK-NEXT: [[IV_1:%.*]] = phi i64 [ [[IV_1_NEXT:%.*]], [[LOOP_1]] ], [ 0, [[LOOP_1_PREHEADER]] ] 18; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds float, ptr [[TMP]], i64 [[IV_1]] 19; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1 20; CHECK-NEXT: [[C_1:%.*]] = icmp ne i64 [[IV_1_NEXT]], 100 21; CHECK-NEXT: br i1 [[C_1]], label [[LOOP_1]], label [[LOOP_0_LATCH_LOOPEXIT1:%.*]] 22; CHECK: loop.2: 23; CHECK-NEXT: [[IV_2:%.*]] = phi i64 [ [[IV_2_NEXT:%.*]], [[LOOP_2]] ], [ 0, [[LOOP_2_PREHEADER]] ] 24; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds float, ptr [[TMP]], i64 [[IV_2]] 25; CHECK-NEXT: store float 0.000000e+00, ptr [[TMP10]], align 4 26; CHECK-NEXT: [[TMP11:%.*]] = load ptr, ptr [[PTR]], align 8 27; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds float, ptr [[TMP11]], i64 [[IV_2]] 28; CHECK-NEXT: [[TMP13:%.*]] = load float, ptr [[TMP12]], align 4 29; CHECK-NEXT: [[IV_2_NEXT]] = add nuw nsw i64 [[IV_2]], 1 30; CHECK-NEXT: [[C_2:%.*]] = icmp ne i64 [[IV_2_NEXT]], 100 31; CHECK-NEXT: br i1 [[C_2]], label [[LOOP_2]], label [[LOOP_0_LATCH_LOOPEXIT:%.*]] 32; CHECK: loop.0.latch.loopexit: 33; CHECK-NEXT: br label [[LOOP_0_LATCH:%.*]] 34; CHECK: loop.0.latch.loopexit1: 35; CHECK-NEXT: br label [[LOOP_0_LATCH]] 36; CHECK: loop.0.latch: 37; CHECK-NEXT: [[C_0:%.*]] = call i1 @cond() 38; CHECK-NEXT: br i1 [[C_0]], label [[LOOP_0]], label [[END:%.*]] 39; CHECK: end: 40; CHECK-NEXT: ret void 41; 42entry: 43 br label %loop.0 44 45loop.0: ; preds = %loop.0.latch, %entry 46 %tmp = load ptr, ptr %ptr, align 8 47 br i1 %c, label %loop.2, label %loop.1 48 49loop.1: ; preds = %loop.1, %loop.0 50 %iv.1 = phi i64 [ %iv.1.next, %loop.1 ], [ 0, %loop.0 ] 51 %tmp4 = getelementptr inbounds float, ptr %tmp, i64 %iv.1 52 store float 0.000000e+00, ptr %tmp4, align 4 53 %iv.1.next = add nuw nsw i64 %iv.1, 1 54 %c.1 = icmp ne i64 %iv.1.next, 100 55 br i1 %c.1, label %loop.1, label %loop.0.latch 56 57loop.2: ; preds = %loop.2, %loop.0 58 %iv.2 = phi i64 [ %iv.2.next, %loop.2 ], [ 0, %loop.0 ] 59 %tmp10 = getelementptr inbounds float, ptr %tmp, i64 %iv.2 60 store float 0.000000e+00, ptr %tmp10, align 4 61 %tmp11 = load ptr, ptr %ptr, align 8 62 %tmp12 = getelementptr inbounds float, ptr %tmp11, i64 %iv.2 63 %tmp13 = load float, ptr %tmp12, align 4 64 %iv.2.next = add nuw nsw i64 %iv.2, 1 65 %c.2 = icmp ne i64 %iv.2.next, 100 66 br i1 %c.2, label %loop.2, label %loop.0.latch 67 68loop.0.latch: ; preds = %loop.2, %loop.1 69 %c.0 = call i1 @cond() 70 br i1 %c.0, label %loop.0, label %end 71 72end: ; preds = %loop.0.latch 73 ret void 74} 75 76declare i1 @cond() 77 78declare void @use.i8(ptr) 79 80declare void @use.i1(i1) 81 82define void @reuse_cast_2(i32 %x, ptr %ptr.1.start) { 83; CHECK-LABEL: @reuse_cast_2( 84; CHECK-NEXT: entry: 85; CHECK-NEXT: [[STACK:%.*]] = alloca [2 x i32], align 4 86; CHECK-NEXT: [[C_0:%.*]] = icmp sgt i32 [[X:%.*]], 0 87; CHECK-NEXT: call void @use.i8(ptr [[STACK]]) 88; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[STACK]], ptr align 4 [[PTR_1_START:%.*]], i64 8, i1 false) 89; CHECK-NEXT: br label [[LOOP:%.*]] 90; CHECK: loop: 91; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ] 92; CHECK-NEXT: [[PTR_1:%.*]] = phi ptr [ [[PTR_1_START]], [[ENTRY]] ], [ [[PTR_1_NEXT:%.*]], [[LOOP]] ] 93; CHECK-NEXT: [[PTR_2:%.*]] = phi ptr [ [[STACK]], [[ENTRY]] ], [ [[PTR_2_NEXT:%.*]], [[LOOP]] ] 94; CHECK-NEXT: [[PTR_1_NEXT]] = getelementptr inbounds i32, ptr [[PTR_1]], i64 1 95; CHECK-NEXT: [[LV:%.*]] = load i32, ptr [[PTR_1]], align 4 96; CHECK-NEXT: [[PTR_2_NEXT]] = getelementptr inbounds i32, ptr [[PTR_2]], i64 1 97; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 98; CHECK-NEXT: [[C_1:%.*]] = icmp eq i32 [[IV]], 0 99; CHECK-NEXT: br i1 [[C_1]], label [[LOOP]], label [[EXIT:%.*]] 100; CHECK: exit: 101; CHECK-NEXT: call void @use.i1(i1 [[C_0]]) 102; CHECK-NEXT: ret void 103; 104entry: 105 %stack = alloca [2 x i32], align 4 106 %c.0 = icmp sgt i32 %x, 0 107 call void @use.i8(ptr %stack) 108 br label %loop 109 110loop: ; preds = %loop, %entry 111 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ] 112 %ptr.1 = phi ptr [ %ptr.1.start, %entry ], [ %ptr.1.next, %loop ] 113 %ptr.2 = phi ptr [ %stack, %entry ], [ %ptr.2.next, %loop ] 114 %ptr.1.next = getelementptr inbounds i32, ptr %ptr.1, i64 1 115 %lv = load i32, ptr %ptr.1, align 4 116 %ptr.2.next = getelementptr inbounds i32, ptr %ptr.2, i64 1 117 store i32 %lv, ptr %ptr.2, align 4 118 %iv.next = add nuw nsw i32 %iv, 1 119 %c.1 = icmp eq i32 %iv, 0 120 br i1 %c.1, label %loop, label %exit 121 122exit: ; preds = %loop 123 call void @use.i1(i1 %c.0) 124 ret void 125} 126