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1; RUN: opt -passes=loop-load-elim -S < %s | FileCheck %s2 3; LoopLoadElimination's propagateStoredValueToLoadUsers() replaces the4; `load` (`%a`) with a hoisted initial `load` and a `phi` that forwards5; 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 debug8; location drop of the hoisted `load` in block `%entry`.9; Moreover, this test also checks the debug location update of the new10; `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 debug14; 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 same17; 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 !835 36for.body: ; preds = %for.body, %entry37 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ], !dbg !938 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !1039 %Aidx_next = getelementptr inbounds i32, ptr %A, i64 %indvars.iv.next, !dbg !1140 %Bidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv, !dbg !1241 %Cidx = getelementptr inbounds i32, ptr %C, i64 %indvars.iv, !dbg !1342 %Aidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !1443 %b = load i32, ptr %Bidx, align 4, !dbg !1544 %a_p1 = add i32 %b, 2, !dbg !1645 store i32 %a_p1, ptr %Aidx_next, align 4, !dbg !1746 %a = load float, ptr %Aidx, align 4, !dbg !1847 %c = fmul float %a, 2.000000e+00, !dbg !1948 %c.int = fptosi float %c to i32, !dbg !2049 store i32 %c.int, ptr %Cidx, align 4, !dbg !2150 %exitcond = icmp eq i64 %indvars.iv.next, %N, !dbg !2251 br i1 %exitcond, label %for.end, label %for.body, !dbg !2352 53for.end: ; preds = %for.body54 ret void, !dbg !2455}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