1*e39e2b4aSstozer; RUN: llc < %s -mtriple=armv7-linux-gnueabihf -stop-before=finalize-isel | FileCheck %s 2*e39e2b4aSstozer 3*e39e2b4aSstozer; When splitting-up integers during CodeGen, if the debug info contains 4*e39e2b4aSstozer; an expression with carry operators (i.e. arithmetic and shift ops), the 5*e39e2b4aSstozer; debug information will be dropped as these operators cannot be correctly 6*e39e2b4aSstozer; expressed across different registers. 7*e39e2b4aSstozer 8*e39e2b4aSstozer; CHECK: [[HIGH:![0-9]+]] = !DILocalVariable(name: "high" 9*e39e2b4aSstozer; CHECK: [[LOW:![0-9]+]] = !DILocalVariable(name: "low" 10*e39e2b4aSstozer; 11*e39e2b4aSstozer; As the debug information for "high" contains an arithmetic shift, while for 12*e39e2b4aSstozer; "low" it does not, only the former should be undefined. 13*e39e2b4aSstozer; CHECK-LABEL: body: 14*e39e2b4aSstozer; CHECK: [[LOWR:%[0-9]+]]:gpr = COPY $r0 15*e39e2b4aSstozer; CHECK: DBG_VALUE [[LOWR]], $noreg, [[LOW]] 16*e39e2b4aSstozer; CHECK: DBG_VALUE $noreg, $noreg, [[HIGH]] 17*e39e2b4aSstozer; CHECK: DBG_VALUE $noreg, $noreg, [[HIGH]] 18*e39e2b4aSstozer 19*e39e2b4aSstozerdefine dso_local i64 @_Z2fnx(i64 returned %value) local_unnamed_addr !dbg !7 { 20*e39e2b4aSstozerentry: 21*e39e2b4aSstozer call void @llvm.dbg.value(metadata i64 %value, metadata !13, metadata !DIExpression()), !dbg !17 22*e39e2b4aSstozer call void @llvm.dbg.value(metadata i64 %value, metadata !14, metadata !DIExpression(DW_OP_constu, 32, DW_OP_shra, DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !17 23*e39e2b4aSstozer call void @llvm.dbg.value(metadata i64 %value, metadata !16, metadata !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !17 24*e39e2b4aSstozer ret i64 %value, !dbg !18 25*e39e2b4aSstozer} 26*e39e2b4aSstozer 27*e39e2b4aSstozerdeclare void @llvm.dbg.value(metadata, metadata, metadata) 28*e39e2b4aSstozer 29*e39e2b4aSstozer!llvm.dbg.cu = !{!0} 30*e39e2b4aSstozer!llvm.module.flags = !{!3, !4, !5} 31*e39e2b4aSstozer!llvm.ident = !{!6} 32*e39e2b4aSstozer 33*e39e2b4aSstozer!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 34*e39e2b4aSstozer!1 = !DIFile(filename: "test.cpp", directory: "/tmp") 35*e39e2b4aSstozer!2 = !{} 36*e39e2b4aSstozer!3 = !{i32 2, !"Dwarf Version", i32 4} 37*e39e2b4aSstozer!4 = !{i32 2, !"Debug Info Version", i32 3} 38*e39e2b4aSstozer!5 = !{i32 1, !"wchar_size", i32 4} 39*e39e2b4aSstozer!6 = !{!"clang version 10.0.0"} 40*e39e2b4aSstozer!7 = distinct !DISubprogram(name: "fn", linkageName: "_Z2fnx", scope: !8, file: !8, line: 2, type: !9, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12) 41*e39e2b4aSstozer!8 = !DIFile(filename: "test.cpp", directory: "/tmp") 42*e39e2b4aSstozer!9 = !DISubroutineType(types: !10) 43*e39e2b4aSstozer!10 = !{!11, !11} 44*e39e2b4aSstozer!11 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed) 45*e39e2b4aSstozer!12 = !{!13, !14, !16} 46*e39e2b4aSstozer!13 = !DILocalVariable(name: "value", arg: 1, scope: !7, file: !8, line: 2, type: !11) 47*e39e2b4aSstozer!14 = !DILocalVariable(name: "high", scope: !7, file: !8, line: 3, type: !15) 48*e39e2b4aSstozer!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 49*e39e2b4aSstozer!16 = !DILocalVariable(name: "low", scope: !7, file: !8, line: 4, type: !15) 50*e39e2b4aSstozer!17 = !DILocation(line: 0, scope: !7) 51*e39e2b4aSstozer!18 = !DILocation(line: 5, column: 3, scope: !7) 52