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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals --version 22; RUN: opt -S -passes=licm < %s| FileCheck %s3 4declare void @foo(...) memory(none)5 6; We can preserve all metadata on instructions that are guaranteed to execute.7define void @test_unconditional(i1 %c, ptr dereferenceable(8) align 8 %p) {8; CHECK-LABEL: define void @test_unconditional9; CHECK-SAME: (i1 [[C:%.*]], ptr align 8 dereferenceable(8) [[P:%.*]]) {10; CHECK-NEXT: [[V1:%.*]] = load i32, ptr [[P]], align 4, !range [[RNG0:![0-9]+]]11; CHECK-NEXT: [[V2:%.*]] = load ptr, ptr [[P]], align 8, !nonnull [[META1:![0-9]+]], !noundef [[META1]]12; CHECK-NEXT: [[V3:%.*]] = load ptr, ptr [[P]], align 8, !dereferenceable [[META2:![0-9]+]], !align [[META2]]13; CHECK-NEXT: br label [[LOOP:%.*]]14; CHECK: loop:15; CHECK-NEXT: call void @foo(i32 [[V1]], ptr [[V2]], ptr [[V3]])16; CHECK-NEXT: br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]17; CHECK: exit:18; CHECK-NEXT: ret void19;20 br label %loop21 22loop:23 %v1 = load i32, ptr %p, !range !{i32 0, i32 10}24 %v2 = load ptr, ptr %p, !nonnull !{}, !noundef !{}25 %v3 = load ptr, ptr %p, !align !{i64 4}, !dereferenceable !{i64 4}26 call void @foo(i32 %v1, ptr %v2, ptr %v3)27 br i1 %c, label %loop, label %exit28 29exit:30 ret void31}32 33; We cannot preserve UB-implying metadata on instructions that are speculated.34; However, we can preserve poison-implying metadata.35define void @test_conditional(i1 %c, i1 %c2, ptr dereferenceable(8) align 8 %p) {36; CHECK-LABEL: define void @test_conditional37; CHECK-SAME: (i1 [[C:%.*]], i1 [[C2:%.*]], ptr align 8 dereferenceable(8) [[P:%.*]]) {38; CHECK-NEXT: [[V1:%.*]] = load i32, ptr [[P]], align 4, !range [[RNG0]]39; CHECK-NEXT: [[V2:%.*]] = load ptr, ptr [[P]], align 8, !nonnull [[META1]]40; CHECK-NEXT: [[V3:%.*]] = load ptr, ptr [[P]], align 8, !align [[META2]]41; CHECK-NEXT: br label [[LOOP:%.*]]42; CHECK: loop:43; CHECK-NEXT: br i1 [[C]], label [[IF:%.*]], label [[LATCH:%.*]]44; CHECK: if:45; CHECK-NEXT: call void @foo(i32 [[V1]], ptr [[V2]], ptr [[V3]])46; CHECK-NEXT: br label [[LATCH]]47; CHECK: latch:48; CHECK-NEXT: br i1 [[C2]], label [[LOOP]], label [[EXIT:%.*]]49; CHECK: exit:50; CHECK-NEXT: ret void51;52 br label %loop53 54loop:55 br i1 %c, label %if, label %latch56 57if:58 %v1 = load i32, ptr %p, !range !{i32 0, i32 10}59 %v2 = load ptr, ptr %p, !nonnull !{}, !noundef !{}60 %v3 = load ptr, ptr %p, !align !{i64 4}, !dereferenceable !{i64 4}61 call void @foo(i32 %v1, ptr %v2, ptr %v3)62 br label %latch63 64latch:65 br i1 %c2, label %loop, label %exit66 67exit:68 ret void69}70 71declare i16 @e(i32)72 73; FIXME: alias metadata violations are UB, so should not be set on the hoisted74; load, as it may not execute.75define void @noalias_metadata_load_may_not_execute() {76; CHECK-LABEL: define void @noalias_metadata_load_may_not_execute() {77; CHECK-NEXT: entry:78; CHECK-NEXT: [[A:%.*]] = alloca i32, align 1679; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i32, ptr [[A]]80; CHECK-NEXT: [[GEP_PROMOTED:%.*]] = load i32, ptr [[GEP]], align 481; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]82; CHECK: loop.header:83; CHECK-NEXT: [[ADD1:%.*]] = phi i32 [ [[GEP_PROMOTED]], [[ENTRY:%.*]] ], [ [[ADD:%.*]], [[LOOP_LATCH:%.*]] ]84; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH]] ]85; CHECK-NEXT: [[CALL:%.*]] = call signext i16 @e(i32 [[IV]])86; CHECK-NEXT: [[C:%.*]] = icmp eq i16 [[CALL]], 087; CHECK-NEXT: br i1 [[C]], label [[LOOP_LATCH]], label [[EXIT:%.*]]88; CHECK: loop.latch:89; CHECK-NEXT: [[ADD]] = add i32 [[ADD1]], 190; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 191; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[IV]], 10092; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_HEADER]], label [[EXIT]]93; CHECK: exit:94; CHECK-NEXT: [[ADD2:%.*]] = phi i32 [ [[ADD]], [[LOOP_LATCH]] ], [ [[ADD1]], [[LOOP_HEADER]] ]95; CHECK-NEXT: store i32 [[ADD2]], ptr [[GEP]], align 496; CHECK-NEXT: ret void97;98entry:99 %a = alloca i32, align 16100 br label %loop.header101 102loop.header:103 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ]104 %call = call signext i16 @e(i32 %iv)105 %c = icmp eq i16 %call, 0106 br i1 %c, label %loop.latch, label %exit107 108loop.latch:109 %gep = getelementptr inbounds i32, ptr %a110 %l = load i32, ptr %gep, !tbaa !0, !noalias !4111 %add = add i32 %l, 1112 store i32 %add, ptr %gep, align 4, !tbaa !0, !noalias !4113 %iv.next = add i32 %iv, 1114 %cmp = icmp ult i32 %iv, 100115 br i1 %cmp, label %loop.header, label %exit116 117exit:118 ret void119}120 121 122!0 = !{!1, !1, i64 0}123!1 = !{!"short", !2, i64 0}124!2 = !{!"omnipotent char", !3, i64 0}125!3 = !{!"Simple C/C++ TBAA"}126!4 = !{!5}127!5 = distinct !{!5, !6}128!6 = distinct !{!6}129;.130; CHECK: attributes #[[ATTR0:[0-9]+]] = { memory(none) }131;.132; CHECK: [[RNG0]] = !{i32 0, i32 10}133; CHECK: [[META1]] = !{}134; CHECK: [[META2]] = !{i64 4}135;.136