52 lines · plain
1# RUN: llc -O0 -mtriple x86_64-pc-linux-gnu -run-pass register-coalescer -verify-coalescing -o - %s | FileCheck %s2 3--- |4 define i16 @main() {5 entry:6 call void @llvm.dbg.value(metadata i8 0, metadata !11, metadata !DIExpression()), !dbg !137 ret i16 08 }9 10 ; Function Attrs: nounwind readnone speculatable11 declare void @llvm.dbg.value(metadata, metadata, metadata)12 13 !llvm.dbg.cu = !{!0}14 !llvm.module.flags = !{!3, !4, !5}15 !llvm.ident = !{!6}16 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: "")19 !2 = !{}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}23 !6 = !{!"clang"}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)26 !9 = !{!10}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)31 32...33---34name: main35tracksRegLiveness: true36body: |37 bb.0.entry:38 %0:gr16_abcd = MOV16ri 039 DBG_VALUE %0.sub_8bit:gr16_abcd, $noreg, !11, !DIExpression(), debug-location !1340 undef %6.sub_8bit:gr16_abcd = COPY killed %0.sub_8bit41 dead $dx = COPY killed %642 43...44 45# Verify that we get $dl in the DBG_VALUE (and not $dx.sub_8bit as we used to46# do before the bugfix, which resulted in "Bad machine code: Illegal47# subregister index for physical register").48#49# CHECK: bb.0.entry:50# CHECK-NEXT: $dx = MOV16ri 051# CHECK-NEXT: DBG_VALUE $dl,52