1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),verify<loops>' -S < %s | FileCheck %s 3; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),verify<loops>' -S < %s --try-experimental-debuginfo-iterators | FileCheck %s 4; 5;; Check that when we duplicate the load in the loop header, we also duplicate 6;; the corresponding dbg.value. 7;; FIXME: the hoisted load dominates the duplicated dbg.value, however as it's 8;; not subsequently used in the loop, so it doesn't get remapped into the 9;; debug user and we get a undef/poison dbg.value. This is suboptimal, but it's 10;; important that the dbg.value gets duplicated nonetheless. 11 12declare void @clobber() 13declare void @llvm.dbg.value(metadata, metadata, metadata) 14 15define i32 @partial_unswitch_true_successor(ptr %ptr, i32 %N) { 16; CHECK-LABEL: @partial_unswitch_true_successor( 17; CHECK-NEXT: entry: 18; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[PTR:%.*]], align 4 19; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 100 20; CHECK-NEXT: br i1 [[TMP1]], label [[ENTRY_SPLIT_US:%.*]], label [[ENTRY_SPLIT:%.*]] 21; CHECK: entry.split.us: 22; CHECK-NEXT: br label [[LOOP_HEADER_US:%.*]] 23; CHECK: loop.header.us: 24; CHECK-NEXT: [[IV_US:%.*]] = phi i32 [ 0, [[ENTRY_SPLIT_US]] ], [ [[IV_NEXT_US:%.*]], [[LOOP_LATCH_US:%.*]] ] 25; CHECK-NEXT: #dbg_value(i32 poison, [[META3:![0-9]+]], !DIExpression(), [[META8:![0-9]+]]) 26; CHECK-NEXT: br label [[NOCLOBBER_US:%.*]] 27; CHECK: noclobber.us: 28; CHECK-NEXT: br label [[LOOP_LATCH_US]] 29; CHECK: loop.latch.us: 30; CHECK-NEXT: [[C_US:%.*]] = icmp ult i32 [[IV_US]], [[N:%.*]] 31; CHECK-NEXT: [[IV_NEXT_US]] = add i32 [[IV_US]], 1 32; CHECK-NEXT: br i1 [[C_US]], label [[LOOP_HEADER_US]], label [[EXIT_SPLIT_US:%.*]] 33; CHECK: exit.split.us: 34; CHECK-NEXT: br label [[EXIT:%.*]] 35; CHECK: entry.split: 36; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] 37; CHECK: loop.header: 38; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY_SPLIT]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] 39; CHECK-NEXT: [[LV:%.*]] = load i32, ptr [[PTR]], align 4 40; CHECK-NEXT: #dbg_value(i32 [[LV]], [[META3]], !DIExpression(), [[META8]]) 41; CHECK-NEXT: [[SC:%.*]] = icmp eq i32 [[LV]], 100 42; CHECK-NEXT: br i1 [[SC]], label [[NOCLOBBER:%.*]], label [[CLOBBER:%.*]] 43; CHECK: noclobber: 44; CHECK-NEXT: br label [[LOOP_LATCH]] 45; CHECK: clobber: 46; CHECK-NEXT: call void @clobber() 47; CHECK-NEXT: br label [[LOOP_LATCH]] 48; CHECK: loop.latch: 49; CHECK-NEXT: [[C:%.*]] = icmp ult i32 [[IV]], [[N]] 50; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1 51; CHECK-NEXT: br i1 [[C]], label [[LOOP_HEADER]], label [[EXIT_SPLIT:%.*]], !llvm.loop [[LOOP9:![0-9]+]] 52; CHECK: exit.split: 53; CHECK-NEXT: br label [[EXIT]] 54; CHECK: exit: 55; CHECK-NEXT: ret i32 10 56; 57entry: 58 br label %loop.header 59 60loop.header: 61 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] 62 %lv = load i32, ptr %ptr 63 call void @llvm.dbg.value(metadata i32 %lv, metadata !6, metadata !DIExpression()), !dbg !7 64 %sc = icmp eq i32 %lv, 100 65 br i1 %sc, label %noclobber, label %clobber 66 67noclobber: 68 br label %loop.latch 69 70clobber: 71 call void @clobber() 72 br label %loop.latch 73 74loop.latch: 75 %c = icmp ult i32 %iv, %N 76 %iv.next = add i32 %iv, 1 77 br i1 %c, label %loop.header, label %exit 78 79exit: 80 ret i32 10 81} 82 83!llvm.module.flags = !{!21} 84!llvm.dbg.cu = !{!2} 85 86!0 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !2, file: !20, scope: !1, type: !3) 87!1 = !DIFile(filename: "b.c", directory: "/private/tmp") 88!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang", isOptimized: true, emissionKind: FullDebug, file: !20) 89!3 = !DISubroutineType(types: !4) 90!4 = !{!5} 91!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 92!6 = !DILocalVariable(name: "i", line: 2, arg: 1, scope: !0, file: !1, type: !5) 93!7 = !DILocation(line: 2, column: 13, scope: !0) 94!9 = !DILocalVariable(name: "k", line: 3, scope: !10, file: !1, type: !5) 95!10 = distinct !DILexicalBlock(line: 2, column: 16, file: !20, scope: !0) 96!11 = !DILocation(line: 3, column: 12, scope: !10) 97!12 = !DILocation(line: 4, column: 3, scope: !10) 98!13 = !DILocation(line: 5, column: 5, scope: !14) 99!14 = distinct !DILexicalBlock(line: 4, column: 10, file: !20, scope: !10) 100!15 = !DILocation(line: 6, column: 3, scope: !14) 101!16 = !DILocation(line: 7, column: 5, scope: !17) 102!17 = distinct !DILexicalBlock(line: 6, column: 10, file: !20, scope: !10) 103!18 = !DILocation(line: 8, column: 3, scope: !17) 104!19 = !DILocation(line: 9, column: 3, scope: !10) 105!20 = !DIFile(filename: "b.c", directory: "/private/tmp") 106!21 = !{i32 1, !"Debug Info Version", i32 3} 107 108 109