1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=mem2reg -S | FileCheck %s
3 ; RUN: opt < %s -passes=mem2reg -S --try-experimental-debuginfo-iterators | FileCheck %s
5 ; Testing conversion from dbg.declare to dbg.value when the variable is a VLA.
7 ; We can't derive the size of the variable simply by looking at the
8 ; metadata. But we can find out the size by examining the alloca, so we should
9 ; know that the load/store instructions are referencing the whole variable,
10 ; and we expect to get dbg.value intrinsics that maps %entryN (aka %[[PHI]])
11 ; and %t0 to the variable allocated as %vla1.
13 ; ModuleID = 'debug-alloca-vla.ll'
14 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
15 target triple = "x86_64-apple-macosx10.12.0"
17 ; Function Attrs: nounwind ssp uwtable
18 define void @scan() #0 !dbg !4 {
21 ; CHECK-NEXT: br label [[FOR_COND:%.*]], !dbg [[DBG10:![0-9]+]]
23 ; CHECK-NEXT: [[VLA1_0:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ [[T0:%.*]], [[FOR_COND]] ]
24 ; CHECK-NEXT: #dbg_value(i32 [[VLA1_0]], [[META11:![0-9]+]], !DIExpression(), [[META19:![0-9]+]])
25 ; CHECK-NEXT: [[T0]] = add i32 [[VLA1_0]], 1
26 ; CHECK-NEXT: #dbg_value(i32 [[T0]], [[META11]], !DIExpression(), [[META19]])
27 ; CHECK-NEXT: br label [[FOR_COND]], !dbg [[DBG10]]
30 %vla1 = alloca i32, i32 1, align 8
31 call void @llvm.dbg.declare(metadata ptr %vla1, metadata !10, metadata !DIExpression()), !dbg !18
32 br label %for.cond, !dbg !18
34 for.cond: ; preds = %for.cond, %entry
35 %entryN = load i32, ptr %vla1, align 8, !dbg !18
36 %t0 = add i32 %entryN, 1
37 store i32 %t0, ptr %vla1, align 8, !dbg !18
38 br label %for.cond, !dbg !18
41 ; Function Attrs: nounwind readnone speculatable
42 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
44 attributes #0 = { nounwind ssp uwtable }
45 attributes #1 = { nounwind readnone speculatable }
48 !llvm.module.flags = !{!2, !3}
50 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "adrian", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
51 !1 = !DIFile(filename: "<stdin>", directory: "/")
52 !2 = !{i32 2, !"Debug Info Version", i32 3}
53 !3 = !{i32 7, !"PIC Level", i32 2}
54 !4 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
55 !5 = !DISubroutineType(types: !6)
57 !7 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
59 !9 = !DILocalVariable(name: "entry", scope: !4, file: !1, line: 6, type: !7)
60 !10 = !DILocalVariable(name: "ptr32", scope: !4, file: !1, line: 240, type: !11)
61 !11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !12, elements: !14)
62 !12 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint32_t", file: !1, line: 41, baseType: !13)
63 !13 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
65 !15 = !DISubrange(count: !16)
66 !16 = !DILocalVariable(name: "__vla_expr", scope: !4, type: !17, flags: DIFlagArtificial)
67 !17 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
68 !18 = !DILocation(line: 6, scope: !4)