1 ; RUN: opt -passes=mem2reg,instcombine %s -o - -S | FileCheck %s
3 ; Test that a dbg.declare describing am alloca with volatile
4 ; load/stores is not lowered into a dbg.value, since the alloca won't
9 ; unsigned long long g();
10 ; void h(unsigned long long);
12 ; volatile unsigned long long v = g();
19 ; CHECK-NOT: call void @llvm.dbg.value
20 ; CHECK: call void @llvm.dbg.declare
21 ; CHECK-NOT: call void @llvm.dbg.value
23 source_filename = "volatile.c"
25 ; Function Attrs: nounwind optsize ssp uwtable
26 define void @f() local_unnamed_addr #0 !dbg !8 {
27 %1 = alloca i64, align 8
28 call void @llvm.lifetime.start.p0(i64 8, ptr %1), !dbg !15
29 call void @llvm.dbg.declare(metadata ptr %1, metadata !12, metadata !DIExpression()), !dbg !15
30 %2 = call i64 (...) @g() #4, !dbg !15
31 store volatile i64 %2, ptr %1, align 8, !dbg !15
32 %3 = load volatile i64, ptr %1, align 8, !dbg !15
33 %4 = icmp eq i64 %3, 0, !dbg !15
34 br i1 %4, label %5, label %7, !dbg !15
36 ; <label>:6: ; preds = %0
37 %6 = call i64 (...) @g() #4, !dbg !15
40 ; <label>:8: ; preds = %5, %0
41 %8 = load volatile i64, ptr %1, align 8, !dbg !15
42 call void @h(i64 %8) #4, !dbg !15
43 call void @llvm.lifetime.end.p0(i64 8, ptr %1), !dbg !15
47 ; Function Attrs: argmemonly nounwind
48 declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
50 ; Function Attrs: nounwind readnone speculatable
51 declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
53 ; Function Attrs: optsize
54 declare i64 @g(...) local_unnamed_addr #3
56 ; Function Attrs: optsize
57 declare void @h(i64) local_unnamed_addr #3
59 ; Function Attrs: argmemonly nounwind
60 declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
62 attributes #0 = { nounwind optsize ssp uwtable }
63 attributes #1 = { argmemonly nounwind }
64 attributes #2 = { nounwind readnone speculatable }
65 attributes #3 = { optsize }
66 attributes #4 = { optsize }
69 !llvm.module.flags = !{!3, !4}
71 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
72 !1 = !DIFile(filename: "volatile.c", directory: "/")
73 !3 = !{i32 2, !"Dwarf Version", i32 4}
74 !4 = !{i32 2, !"Debug Info Version", i32 3}
75 !8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !0, retainedNodes: !11)
76 !9 = !DISubroutineType(types: !10)
79 !12 = !DILocalVariable(name: "v", scope: !8, file: !1, line: 4, type: !13)
80 !13 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !14)
81 !14 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
82 !15 = !DILocation(line: 4, column: 3, scope: !8)