1; RUN: llc -mtriple=x86_64-unknown-linux-gnu -start-after=codegenprepare -stop-before=finalize-isel -o - %s | FileCheck %s
2
3; Input to this test looked like this and was compiled using: clang -g -O1 -mllvm -stop-after=codegenprepare -S
4;
5;    int fn1(long t1) {
6;      return t;
7;    }
8;
9
10; Catch metadata references for involved variables.
11;
12; CHECK-DAG: ![[T1:.*]] = !DILocalVariable(name: "t1"
13
14
15define dso_local i32 @fn1(i64 %t1) local_unnamed_addr #0 !dbg !7 {
16; We expect that the same width COPY reuses the debug location,
17; but the width narrowing COPY does not.
18;
19; CHECK-LABEL: name:            fn1
20; CHECK: DBG_VALUE $rdi, $noreg, ![[T1]], !DIExpression(),
21; CHECK-NEXT: %0:gr64 = COPY $rdi
22; CHECK-NEXT: DBG_VALUE %0, $noreg, ![[T1]], !DIExpression(),
23; CHECK-NEXT: %1:gr32 = COPY %0.sub_32bit
24; CHECK-NEXT: COPY
25; CHECK-NEXT: RET
26entry:
27  call void @llvm.dbg.value(metadata i64 %t1, metadata !13, metadata !DIExpression()), !dbg !14
28  %0 = trunc i64 %t1 to i32, !dbg !15
29  ret i32 %0, !dbg !16
30}
31
32declare void @llvm.dbg.value(metadata, metadata, metadata) #1
33
34attributes #0 = { norecurse nounwind readnone uwtable }
35attributes #1 = { nounwind readnone speculatable willreturn }
36
37!llvm.dbg.cu = !{!0}
38!llvm.module.flags = !{!3, !4, !5}
39!llvm.ident = !{!6}
40
41!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0 (git@github.com:tbosch/llvm-project.git 0b11aed869bf09ba60
42d7ed17334cf0b76e6a5922)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
43!1 = !DIFile(filename: "test.cc", directory: "")
44!2 = !{}
45!3 = !{i32 7, !"Dwarf Version", i32 4}
46!4 = !{i32 2, !"Debug Info Version", i32 3}
47!5 = !{i32 1, !"wchar_size", i32 4}
48!6 = !{!"clang version 11.0.0 (git@github.com:tbosch/llvm-project.git 0b11aed869bf09ba60d7ed17334cf0b76e6a5922)"}
49!7 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
50!8 = !DISubroutineType(types: !9)
51!9 = !{!10, !11}
52!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
53!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
54!12 = !{!13}
55!13 = !DILocalVariable(name: "t1", arg: 1, scope: !7, file: !1, line: 1, type: !11)
56!14 = !DILocation(line: 0, scope: !7)
57!15 = !DILocation(line: 2, column: 10, scope: !7)
58!16 = !DILocation(line: 2, column: 3, scope: !7)
59