1 ; RUN: opt -passes=loop-load-elim -S < %s | FileCheck %s
3 ; LoopLoadElimination's propagateStoredValueToLoadUsers() replaces the
4 ; `load` (`%a`) with a hoisted initial `load` and a `phi` that forwards
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:
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`).
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.
19 ; for (unsigned i = 0; i < 100; i++) {
21 ; C[i] = ((float*)A)[i] * 2;
24 define void @f(ptr noalias %A, ptr noalias %B, ptr noalias %C, i64 %N) !dbg !5 {
25 ; CHECK-LABEL: define void @f(
27 ; CHECK-NEXT: [[LOAD_INITIAL:%.*]] = load float, ptr {{.*}}, align 4{{$}}
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,
34 br label %for.body, !dbg !8
36 for.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
53 for.end: ; preds = %for.body
58 !llvm.debugify = !{!2, !3}
59 !llvm.module.flags = !{!4}
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: "/")
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)
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)