--- | ; RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s ; Created from: ; void sink(int a); ; void __attribute((always_inline)) f(int a) { sink(a); } ; void foo(int i) { ; f(i); ; if (i) ; f(i); ; f(i); ; } ; ; This test verifies that LiveDebugValues doesn't propagate DBG_VALUEs into ; basic blocks that are beyond the scope of the source variable. ; ; CHECK: ![[F_SP:[0-9]+]] = distinct !DISubprogram(name: "f", {{.*}}) ; CHECK: ![[A_VAR:[0-9]+]] = !DILocalVariable(name: "a",{{.*}}) ; CHECK: ![[I_VAR:[0-9]+]] = !DILocalVariable(name: "i",{{.*}}) ; CHECK: ![[I_LOC:[0-9]+]] = !DILocation(line: 4, column: 14, scope: !{{[0-9]+}}) ; CHECK: ![[INLCS1:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS1:[0-9]+]]) ; CHECK: ![[CS1]] = distinct !DILocation(line: 5, column: 3, scope: !{{[0-9]+}}) ; CHECK: ![[INLCS2:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS2:[0-9]+]]) ; CHECK: ![[CS2]] = distinct !DILocation(line: 7, column: 5, scope: !{{[0-9]+}}) ; CHECK: ![[INLCS3:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS3:[0-9]+]]) ; CHECK: ![[CS3]] = distinct !DILocation(line: 8, column: 3, scope: !{{[0-9]+}}) ; ; CHECK: bb.1.if.then: ; CHECK: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]] ; CHECK-NOT: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[A_VAR]], !DIExpression(), debug-location ; CHECK: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS2]] ; CHECK: bb.2.if.end: ; CHECK: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]] ; CHECK-NOT: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[A_VAR]], !DIExpression(), debug-location ; CHECK: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS3]] ; ; ModuleID = 'livedebugvalues-limit.ll' source_filename = "livedebugvalues-limit.c" target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-apple-macosx" ; Function Attrs: alwaysinline nounwind ssp uwtable define void @f(i32 %a) local_unnamed_addr #0 !dbg !7 { entry: tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !13), !dbg !14 tail call void @sink(i32 %a) #4, !dbg !15 ret void, !dbg !16 } declare void @sink(i32) local_unnamed_addr ; Function Attrs: nounwind ssp uwtable define void @foo(i32 %i) local_unnamed_addr #2 !dbg !17 { entry: tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !19, metadata !13), !dbg !20 tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !21 tail call void @sink(i32 %i) #4, !dbg !23 %tobool = icmp eq i32 %i, 0, !dbg !24 br i1 %tobool, label %if.end, label %if.then, !dbg !26 if.then: ; preds = %entry tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !27 tail call void @sink(i32 %i) #4, !dbg !29 br label %if.end, !dbg !30 if.end: ; preds = %if.then, %entry tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !31 tail call void @sink(i32 %i) #4, !dbg !33 ret void, !dbg !34 } ; Function Attrs: nounwind readnone declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3 ; Function Attrs: nounwind declare void @llvm.stackprotector(i8*, i8**) #4 attributes #0 = { alwaysinline nounwind ssp uwtable } attributes #2 = { nounwind ssp uwtable } attributes #3 = { nounwind readnone } attributes #4 = { nounwind } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!3, !4, !5} !llvm.ident = !{!6} !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) !1 = !DIFile(filename: "livedebugvalues-limit.c", directory: "/Volumes/Fusion/Data/llvm") !2 = !{} !3 = !{i32 2, !"Dwarf Version", i32 4} !4 = !{i32 2, !"Debug Info Version", i32 3} !5 = !{i32 1, !"PIC Level", i32 2} !6 = !{!"clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)"} !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) !8 = !DISubroutineType(types: !9) !9 = !{null, !10} !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) !11 = !{!12} !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 3, type: !10) !13 = !DIExpression() !14 = !DILocation(line: 3, column: 41, scope: !7) !15 = !DILocation(line: 3, column: 46, scope: !7) !16 = !DILocation(line: 3, column: 55, scope: !7) !17 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !18) !18 = !{!19} !19 = !DILocalVariable(name: "i", arg: 1, scope: !17, file: !1, line: 4, type: !10) !20 = !DILocation(line: 4, column: 14, scope: !17) !21 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !22) !22 = distinct !DILocation(line: 5, column: 3, scope: !17) !23 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !22) !24 = !DILocation(line: 6, column: 7, scope: !25) !25 = distinct !DILexicalBlock(scope: !17, file: !1, line: 6, column: 7) !26 = !DILocation(line: 6, column: 7, scope: !17) !27 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !28) !28 = distinct !DILocation(line: 7, column: 5, scope: !25) !29 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !28) !30 = !DILocation(line: 7, column: 5, scope: !25) !31 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !32) !32 = distinct !DILocation(line: 8, column: 3, scope: !17) !33 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !32) !34 = !DILocation(line: 9, column: 1, scope: !17) ... --- name: f alignment: 4 exposesReturnsTwice: false legalized: false regBankSelected: false selected: false tracksRegLiveness: true liveins: - { reg: '$edi' } calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx', '$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15', '$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d', '$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ] frameInfo: isFrameAddressTaken: false isReturnAddressTaken: false hasStackMap: false hasPatchPoint: false stackSize: 8 offsetAdjustment: 0 maxAlignment: 0 adjustsStack: false hasCalls: false maxCallFrameSize: 0 hasOpaqueSPAdjustment: false hasVAStart: false hasMustTailInVarArgFunc: false fixedStack: - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 } body: | bb.0.entry: liveins: $edi, $rbp frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp CFI_INSTRUCTION def_cfa_offset 16 CFI_INSTRUCTION offset $rbp, -16 $rbp = frame-setup MOV64rr $rsp CFI_INSTRUCTION def_cfa_register $rbp DBG_VALUE debug-use $edi, debug-use _, !12, !13, debug-location !14 $rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !15 TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !15 ... --- name: foo alignment: 4 exposesReturnsTwice: false legalized: false regBankSelected: false selected: false tracksRegLiveness: true liveins: - { reg: '$edi' } calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx', '$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15', '$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d', '$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ] frameInfo: isFrameAddressTaken: false isReturnAddressTaken: false hasStackMap: false hasPatchPoint: false stackSize: 24 offsetAdjustment: -8 maxAlignment: 0 adjustsStack: true hasCalls: true maxCallFrameSize: 0 hasOpaqueSPAdjustment: false hasVAStart: false hasMustTailInVarArgFunc: false fixedStack: - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' } - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16 } body: | bb.0.entry: successors: %bb.2.if.end, %bb.1.if.then liveins: $edi, $rbx, $rbp frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp CFI_INSTRUCTION def_cfa_offset 16 CFI_INSTRUCTION offset $rbp, -16 $rbp = frame-setup MOV64rr $rsp CFI_INSTRUCTION def_cfa_register $rbp frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp CFI_INSTRUCTION offset $rbx, -24 DBG_VALUE debug-use $edi, debug-use _, !19, !13, debug-location !20 $ebx = MOV32rr $edi DBG_VALUE debug-use $ebx, debug-use _, !12, !13, debug-location !21 DBG_VALUE debug-use $ebx, debug-use _, !19, !13, debug-location !20 CALL64pcrel32 @sink, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, debug-location !23 TEST32rr $ebx, $ebx, implicit-def $eflags, debug-location !24 JE_1 %bb.2.if.end, implicit $eflags bb.1.if.then: successors: %bb.2.if.end liveins: $ebx, $rbp DBG_VALUE debug-use $ebx, debug-use _, !19, !13, debug-location !20 DBG_VALUE debug-use $ebx, debug-use _, !12, !13, debug-location !27 $edi = MOV32rr $ebx, debug-location !29 CALL64pcrel32 @sink, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, debug-location !29 bb.2.if.end: liveins: $ebx, $rbp DBG_VALUE debug-use $ebx, debug-use _, !19, !13, debug-location !20 $edi = MOV32rr killed $ebx, debug-location !33 $rsp = ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !33 DBG_VALUE debug-use $ebx, debug-use _, !12, !13, debug-location !31 $rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !33 $rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !33 TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !33 ...