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1; RUN: llc -debug-entry-values -filetype=asm -o - %s | FileCheck %s2; RUN: llc -force-instr-ref-livedebugvalues=1 -debug-entry-values -filetype=asm -o - %s | FileCheck %s3 4; The q0 register does not have a DWARF register number, and is instead emitted5; as a composite location description with two sub-registers. Previously we6; emitted a single DW_OP_entry_value wrapping that whole composite location7; description, but that is not valid DWARF; DW_OP_entry_value operations can8; only hold DWARF expressions and register location descriptions.9;10; In the future we may want to emit a composite location description where each11; DW_OP_regx operation is wrapped in an entry value operation, but for now12; just verify that no invalid DWARF is emitted.13 14target datalayout = "E-m:e-i64:64-n32:64-S128"15target triple = "sparc64"16 17; Based on the following C reproducer:18;19; volatile long double global;20; extern void clobber();21; int foo(long double p) {22; global = p;23; clobber();24; return 123;25; }26 27; Verify that we got an entry value in the DIExpression...28; CHECK: DEBUG_VALUE: foo:p <- [DW_OP_LLVM_entry_value 1] $q029 30; ... but that no entry value location was emitted:31; CHECK: .half 8 ! Loc expr size32; CHECK-NEXT: .byte 144 ! sub-register DW_OP_regx33; CHECK-NEXT: .byte 72 ! 7234; CHECK-NEXT: .byte 147 ! DW_OP_piece35; CHECK-NEXT: .byte 8 ! 836; CHECK-NEXT: .byte 144 ! sub-register DW_OP_regx37; CHECK-NEXT: .byte 73 ! 7338; CHECK-NEXT: .byte 147 ! DW_OP_piece39; CHECK-NEXT: .byte 8 ! 840; CHECK-NEXT: .xword 041; CHECK-NEXT: .xword 042 43@global = common global fp128 0xL00000000000000000000000000000000, align 16, !dbg !044 45; Function Attrs: nounwind46define signext i32 @foo(fp128 %p) #0 !dbg !12 {47entry:48 call void @llvm.dbg.value(metadata fp128 %p, metadata !17, metadata !DIExpression()), !dbg !1849 store volatile fp128 %p, ptr @global, align 16, !dbg !1950 tail call void @clobber(), !dbg !2051 ret i32 123, !dbg !2152}53 54declare void @clobber()55 56; Function Attrs: nounwind readnone speculatable willreturn57declare void @llvm.dbg.value(metadata, metadata, metadata) #158 59attributes #0 = { nounwind }60attributes #1 = { nounwind readnone speculatable willreturn }61 62!llvm.dbg.cu = !{!2}63!llvm.module.flags = !{!8, !9, !10}64!llvm.ident = !{!11}65 66!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())67!1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)68!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)69!3 = !DIFile(filename: "entry-value-complex-reg-expr.c", directory: "/")70!4 = !{}71!5 = !{!0}72!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)73!7 = !DIBasicType(name: "long double", size: 128, encoding: DW_ATE_float)74!8 = !{i32 2, !"Dwarf Version", i32 4}75!9 = !{i32 2, !"Debug Info Version", i32 3}76!10 = !{i32 1, !"wchar_size", i32 4}77!11 = !{!"clang version 10.0.0"}78!12 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 3, type: !13, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !16)79!13 = !DISubroutineType(types: !14)80!14 = !{!15, !7}81!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)82!16 = !{!17}83!17 = !DILocalVariable(name: "p", arg: 1, scope: !12, file: !3, line: 3, type: !7)84!18 = !DILocation(line: 0, scope: !12)85!19 = !DILocation(line: 4, scope: !12)86!20 = !DILocation(line: 5, scope: !12)87!21 = !DILocation(line: 6, scope: !12)88