1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 2; RUN: opt -S < %s -passes=loop-vectorize -force-vector-width=2 | FileCheck %s 3;; Tests that when we simplify the loop-exit branch condition, we preserve the 4;; !dbg attachment for all loop-exit branches. 5 6define i32 @foo(ptr %p) { 7; CHECK-LABEL: define i32 @foo( 8; CHECK-SAME: ptr [[P:%.*]]) { 9; CHECK-NEXT: [[ENTRY:.*]]: 10; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]] 11; CHECK: [[VECTOR_PH]]: 12; CHECK-NEXT: br label %[[VECTOR_BODY:.*]] 13; CHECK: [[VECTOR_BODY]]: 14; CHECK-NEXT: store i8 0, ptr [[P]], align 1, !dbg [[DBG3:![0-9]+]] 15; CHECK-NEXT: br label %[[MIDDLE_BLOCK:.*]], !dbg [[DBG7:![0-9]+]] 16; CHECK: [[MIDDLE_BLOCK]]: 17; CHECK-NEXT: br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]], !dbg [[DBG8:![0-9]+]] 18; CHECK: [[SCALAR_PH]]: 19; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 2, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ], !dbg [[DBG9:![0-9]+]] 20; CHECK-NEXT: br label %[[LOOP:.*]] 21; CHECK: [[LOOP]]: 22; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], %[[LOOP]] ], [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], !dbg [[DBG9]] 23; CHECK-NEXT: [[CONV:%.*]] = trunc i64 0 to i8, !dbg [[DBG7]] 24; CHECK-NEXT: store i8 [[CONV]], ptr [[P]], align 1, !dbg [[DBG3]] 25; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1, !dbg [[DBG10:![0-9]+]] 26; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV]], 1, !dbg [[DBG11:![0-9]+]] 27; CHECK-NEXT: br i1 [[EXITCOND]], label %[[EXIT]], label %[[LOOP]], !dbg [[DBG8]], !llvm.loop [[LOOP12:![0-9]+]] 28; CHECK: [[EXIT]]: 29; CHECK-NEXT: ret i32 0 30; 31entry: 32 br label %loop 33 34loop: ; preds = %loop, %entry 35 %iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ], !dbg !3 36 %conv = trunc i64 0 to i8, !dbg !4 37 store i8 %conv, ptr %p, align 1, !dbg !5 38 %iv.next = add i64 %iv, 1, !dbg !6 39 %exitcond = icmp eq i64 %iv, 1, !dbg !7 40 br i1 %exitcond, label %exit, label %loop, !dbg !8 41 42exit: ; preds = %loop 43 ret i32 0 44} 45 46!llvm.dbg.cu = !{!0} 47!llvm.module.flags = !{!2} 48 49!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 20.0.0git") 50!1 = !DIFile(filename: "test.cpp", directory: "/") 51!2 = !{i32 2, !"Debug Info Version", i32 3} 52!3 = !DILocation(line: 4, scope: !9) 53!4 = !DILocation(line: 5, scope: !9) 54!5 = !DILocation(line: 6, scope: !9) 55!6 = !DILocation(line: 7, scope: !9) 56!7 = !DILocation(line: 8, scope: !9) 57!8 = !DILocation(line: 9, scope: !9) 58!9 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 11, type: !10, unit: !0, retainedNodes: !11) 59!10 = distinct !DISubroutineType(types: !11) 60!11 = !{} 61;. 62; CHECK: [[META0:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: [[META1:![0-9]+]], producer: "{{.*}}clang version {{.*}}", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug) 63; CHECK: [[META1]] = !DIFile(filename: "test.cpp", directory: {{.*}}) 64; CHECK: [[DBG3]] = !DILocation(line: 6, scope: [[META4:![0-9]+]]) 65; CHECK: [[META4]] = distinct !DISubprogram(name: "foo", scope: [[META1]], file: [[META1]], line: 11, type: [[META5:![0-9]+]], spFlags: DISPFlagDefinition, unit: [[META0]], retainedNodes: [[META6:![0-9]+]]) 66; CHECK: [[META5]] = distinct !DISubroutineType(types: [[META6]]) 67; CHECK: [[META6]] = !{} 68; CHECK: [[DBG7]] = !DILocation(line: 5, scope: [[META4]]) 69; CHECK: [[DBG8]] = !DILocation(line: 9, scope: [[META4]]) 70; CHECK: [[DBG9]] = !DILocation(line: 4, scope: [[META4]]) 71; CHECK: [[DBG10]] = !DILocation(line: 7, scope: [[META4]]) 72; CHECK: [[DBG11]] = !DILocation(line: 8, scope: [[META4]]) 73; CHECK: [[LOOP12]] = distinct !{[[LOOP12]], [[META13:![0-9]+]], [[META14:![0-9]+]]} 74; CHECK: [[META13]] = !{!"llvm.loop.unroll.runtime.disable"} 75; CHECK: [[META14]] = !{!"llvm.loop.isvectorized", i32 1} 76;. 77