--- |
; 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 $ebx, $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]]
; CHECK-NOT: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location
; CHECK: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS2]]
; CHECK: bb.2.if.end:
; CHECK: DBG_VALUE $ebx, $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]]
; CHECK-NOT: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location
; CHECK: DBG_VALUE $ebx, $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: 16
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 $edi, _, !12, !13, debug-location !14
$rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !15
TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !15
...
---
name: foo
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
liveins:
- { reg: '$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 $edi, _, !19, !13, debug-location !20
$ebx = MOV32rr $edi
DBG_VALUE $ebx, _, !12, !13, debug-location !21
DBG_VALUE $ebx, _, !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
JCC_1 %bb.2.if.end, 4, implicit $eflags
bb.1.if.then:
successors: %bb.2.if.end
liveins: $ebx, $rbp
DBG_VALUE $ebx, _, !19, !13, debug-location !20
DBG_VALUE $ebx, _, !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 $ebx, _, !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 $ebx, _, !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
...