xref: /llvm-project/llvm/test/DebugInfo/assignment-tracking/X86/sdag-ir-salvage-assign.ll (revision 30845e8ab46c416a2e333eb84239e9ec71e92617) 
1; RUN: llc -mtriple=x86_64-unknown-unknown -start-after=codegenprepare \
2; RUN:    -stop-before finalize-isel %s -o -  \
3; RUN:    -experimental-debug-variable-locations=false \
4; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE
5
6; RUN: llc --try-experimental-debuginfo-iterators -mtriple=x86_64-unknown-unknown -start-after=codegenprepare \
7; RUN:    -stop-before finalize-isel %s -o -  \
8; RUN:    -experimental-debug-variable-locations=false \
9; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE
10; RUN: llc -mtriple=x86_64-unknown-unknown -start-after=codegenprepare \
11; RUN:    -stop-before finalize-isel %s -o -  \
12; RUN:    -experimental-debug-variable-locations=true \
13; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF
14
15
16; RUN: llc --try-experimental-debuginfo-iterators -mtriple=x86_64-unknown-unknown -start-after=codegenprepare \
17; RUN:    -stop-before finalize-isel %s -o -  \
18; RUN:    -experimental-debug-variable-locations=true \
19; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF
20
21; Adapted from sdag-ir-salvage.ll to test dbg.assign intrinsics. This ensures
22; that dbg.assigns with no linked store are treated as dbg.values.
23
24; Test that the dbg.value for %baz, which doesn't exist in the 'next' bb,
25; can be salvaged back to the underlying argument vreg.
26
27; CHECK:       ![[AAAVAR:.*]] = !DILocalVariable(name: "aaa",
28; CHECK-LABEL: bb.0.entry:
29; INSTRREF:    DBG_PHI $rdi, 1
30; CHECK-LABEL: bb.1.next:
31; INSTRREF:    DBG_INSTR_REF ![[AAAVAR]], {{.+}}, dbg-instr-ref(1, 0)
32; DBGVALUE:    DBG_VALUE %{{[0-9]+}}, $noreg, ![[AAAVAR]]
33
34target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
35target triple = "x86_64-linux-gnu"
36
37define i8 @f(ptr %foo) local_unnamed_addr !dbg !6 {
38entry:
39  %bar = getelementptr i32, ptr %foo, i32 4
40  %baz = bitcast ptr %bar to ptr
41  %quux = load i8, ptr %baz
42  br label %next
43
44next:                                             ; preds = %entry
45  tail call void @llvm.dbg.assign(metadata ptr %baz, metadata !15, metadata !DIExpression(), metadata !31, metadata ptr undef, metadata !DIExpression()), !dbg !30
46  %xyzzy = add i8 %quux, 123
47  br label %fin
48
49fin:                                              ; preds = %next
50  %trains = getelementptr i32, ptr %foo, i32 3
51  %planes = bitcast ptr %trains to ptr
52  %cars = load i8, ptr %planes
53  %ret = add i8 %xyzzy, %cars
54  ret i8 %ret
55}
56
57; Function Attrs: nounwind readnone speculatable
58declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #0
59
60attributes #0 = { nounwind readnone speculatable }
61
62!llvm.dbg.cu = !{!0}
63!llvm.module.flags = !{!25, !26, !27, !28, !1000}
64!llvm.ident = !{!29}
65
66!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
67!1 = !DIFile(filename: "test.c", directory: ".")
68!2 = !{}
69!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 18, type: !7, scopeLine: 19, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14)
70!7 = !DISubroutineType(types: !8)
71!8 = !{!13}
72!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_unsigned)
73!14 = !{!15}
74!15 = !DILocalVariable(name: "aaa", scope: !6, file: !1, line: 18, type: !13)
75!25 = !{i32 2, !"Dwarf Version", i32 4}
76!26 = !{i32 2, !"Debug Info Version", i32 3}
77!27 = !{i32 1, !"wchar_size", i32 4}
78!28 = !{i32 7, !"PIC Level", i32 2}
79!29 = !{!"clang"}
80!30 = !DILocation(line: 18, column: 14, scope: !6)
81!31 = distinct !DIAssignID()
82!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
83