1; RUN: opt -passes=loop-load-elim -S < %s | FileCheck %s 2 3; LoopLoadElimination's propagateStoredValueToLoadUsers() replaces the 4; `load` (`%a`) with a hoisted initial `load` and a `phi` that forwards 5; the stored value. 6; This test checks that the debug location is propagated to the new `phi` 7; from the original `load` it replaces in block `%for.body` and the debug 8; location drop of the hoisted `load` in block `%entry`. 9; Moreover, this test also checks the debug location update of the new 10; `bitcast` created when the `load` type is mismatched with the `store` type: 11; store i32 ... 12; %a = load float, ... 13; Because the `bitcast` casts the old `load` value, it has the same debug 14; location as the old `load` (ie., the same as the new `phi`). 15 16; If the store and the load use different types, but have the same 17; size then we should still be able to forward the value. 18; 19; for (unsigned i = 0; i < 100; i++) { 20; A[i+1] = B[i] + 2; 21; C[i] = ((float*)A)[i] * 2; 22; } 23 24define void @f(ptr noalias %A, ptr noalias %B, ptr noalias %C, i64 %N) !dbg !5 { 25; CHECK-LABEL: define void @f( 26; CHECK-NEXT: entry: 27; CHECK-NEXT: [[LOAD_INITIAL:%.*]] = load float, ptr {{.*}}, align 4{{$}} 28; CHECK: for.body: 29; CHECK-NEXT: [[STORE_FORWARDED:%.*]] = phi float [ [[LOAD_INITIAL]], %entry ], [ [[STORE_FORWARD_CAST:%.*]], %for.body ], !dbg [[DBG9:![0-9]+]] 30; CHECK: [[STORE_FORWARD_CAST]] = bitcast i32 {{.*}} to float, !dbg [[DBG9]] 31; CHECK: [[DBG9]] = !DILocation(line: 11, 32; 33entry: 34 br label %for.body, !dbg !8 35 36for.body: ; preds = %for.body, %entry 37 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ], !dbg !9 38 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10 39 %Aidx_next = getelementptr inbounds i32, ptr %A, i64 %indvars.iv.next, !dbg !11 40 %Bidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv, !dbg !12 41 %Cidx = getelementptr inbounds i32, ptr %C, i64 %indvars.iv, !dbg !13 42 %Aidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !14 43 %b = load i32, ptr %Bidx, align 4, !dbg !15 44 %a_p1 = add i32 %b, 2, !dbg !16 45 store i32 %a_p1, ptr %Aidx_next, align 4, !dbg !17 46 %a = load float, ptr %Aidx, align 4, !dbg !18 47 %c = fmul float %a, 2.000000e+00, !dbg !19 48 %c.int = fptosi float %c to i32, !dbg !20 49 store i32 %c.int, ptr %Cidx, align 4, !dbg !21 50 %exitcond = icmp eq i64 %indvars.iv.next, %N, !dbg !22 51 br i1 %exitcond, label %for.end, label %for.body, !dbg !23 52 53for.end: ; preds = %for.body 54 ret void, !dbg !24 55} 56 57!llvm.dbg.cu = !{!0} 58!llvm.debugify = !{!2, !3} 59!llvm.module.flags = !{!4} 60 61!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 62!1 = !DIFile(filename: "type-mismatch.ll", directory: "/") 63!2 = !{i32 17} 64!3 = !{i32 0} 65!4 = !{i32 2, !"Debug Info Version", i32 3} 66!5 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0) 67!6 = !DISubroutineType(types: !7) 68!7 = !{} 69!8 = !DILocation(line: 1, column: 1, scope: !5) 70!9 = !DILocation(line: 2, column: 1, scope: !5) 71!10 = !DILocation(line: 3, column: 1, scope: !5) 72!11 = !DILocation(line: 4, column: 1, scope: !5) 73!12 = !DILocation(line: 5, column: 1, scope: !5) 74!13 = !DILocation(line: 6, column: 1, scope: !5) 75!14 = !DILocation(line: 7, column: 1, scope: !5) 76!15 = !DILocation(line: 8, column: 1, scope: !5) 77!16 = !DILocation(line: 9, column: 1, scope: !5) 78!17 = !DILocation(line: 10, column: 1, scope: !5) 79!18 = !DILocation(line: 11, column: 1, scope: !5) 80!19 = !DILocation(line: 12, column: 1, scope: !5) 81!20 = !DILocation(line: 13, column: 1, scope: !5) 82!21 = !DILocation(line: 14, column: 1, scope: !5) 83!22 = !DILocation(line: 15, column: 1, scope: !5) 84!23 = !DILocation(line: 16, column: 1, scope: !5) 85!24 = !DILocation(line: 17, column: 1, scope: !5) 86