1 # RUN: llc -O0 -mtriple x86_64-pc-linux-gnu -run-pass register-coalescer -verify-coalescing -o - %s | FileCheck %s
6 call void @llvm.dbg.value(metadata i8 0, metadata !11, metadata !DIExpression()), !dbg !13
10 ; Function Attrs: nounwind readnone speculatable
11 declare void @llvm.dbg.value(metadata, metadata, metadata)
14 !llvm.module.flags = !{!3, !4, !5}
17 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
18 !1 = !DIFile(filename: "tmp.c", directory: "")
20 !3 = !{i32 2, !"Dwarf Version", i32 4}
21 !4 = !{i32 2, !"Debug Info Version", i32 3}
22 !5 = !{i32 1, !"wchar_size", i32 1}
24 !7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, isOptimized: false, unit: !0, retainedNodes: !2)
25 !8 = !DISubroutineType(types: !9)
27 !10 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
28 !11 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 5, type: !12)
29 !12 = !DIBasicType(name: "mytype", size: 16)
30 !13 = !DILocation(line: 5, column: 11, scope: !7)
35 tracksRegLiveness: true
38 %0:gr16_abcd = MOV16ri 0
39 DBG_VALUE %0.sub_8bit:gr16_abcd, $noreg, !11, !DIExpression(), debug-location !13
40 undef %6.sub_8bit:gr16_abcd = COPY killed %0.sub_8bit
41 dead $dx = COPY killed %6
45 # Verify that we get $dl in the DBG_VALUE (and not $dx.sub_8bit as we used to
46 # do before the bugfix, which resulted in "Bad machine code: Illegal
47 # subregister index for physical register").
50 # CHECK-NEXT: $dx = MOV16ri 0
51 # CHECK-NEXT: DBG_VALUE $dl,