debug-loc-offset.mir
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# RUN: llc -o - %s -start-after=patchable-function -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 | llvm-dwarfdump -v - | FileCheck %s
# From the code:
#
# debug-loc-offset1.cc
# int bar (int b) {
# return b+4;
# }
#
# debug-loc-offset2.cc
# struct A {
# int var;
# virtual char foo();
# };
#
# void baz(struct A a) {
# int z = 2;
# if (a.var > 2)
# z++;
# if (a.foo() == 'a')
# z++;
# }
#
# Compiled separately for i386-pc-linux-gnu and linked together.
# This ensures that we have multiple compile units and multiple location lists
# so that we can verify that
# debug_loc entries are relative to the low_pc of the CU. The loc entry for
# the byval argument in foo.cpp is in the second CU and so should have
# an offset relative to that CU rather than from the beginning of the text
# section.
#
# Checking that we have two compile units with two sets of high/lo_pc.
# CHECK: .debug_info contents
# CHECK: DW_TAG_compile_unit
# CHECK: DW_AT_low_pc {{.*}} (0x00000020 ".text")
# CHECK: DW_AT_high_pc
#
# CHECK: DW_TAG_subprogram
# CHECK-NOT: DW_TAG
# CHECK: DW_AT_linkage_name [DW_FORM_strp]{{.*}}"_Z3baz1A"
# CHECK-NOT: {{DW_TAG|NULL}}
# CHECK: DW_TAG_formal_parameter
# CHECK-NOT: DW_TAG
# CHECK: DW_AT_location [DW_FORM_sec_offset] ({{.*}}
# CHECK-NEXT: [0x00000029, 0x00000037) ".text": DW_OP_breg0 EAX+0, DW_OP_deref
# CHECK-NEXT: [0x00000037, 0x00000063) ".text": DW_OP_breg5 EBP-8, DW_OP_deref, DW_OP_deref
# CHECK-NEXT: DW_AT_name [DW_FORM_strp]{{.*}}"a"
#
# CHECK: DW_TAG_variable
# CHECK: DW_AT_location [DW_FORM_exprloc]
# CHECK-NOT: DW_AT_location
#
# CHECK: DW_TAG_compile_unit
# CHECK: DW_AT_low_pc {{.*}} (0x00000000 ".text")
# CHECK: DW_AT_high_pc
#
# CHECK: DW_TAG_subprogram
# CHECK-NOT: DW_TAG
# CHECK: DW_AT_linkage_name [DW_FORM_strp]{{.*}}"_Z3bari"
# CHECK-NOT: {{DW_TAG|NULL}}
# CHECK: DW_TAG_formal_parameter
# CHECK-NOT: DW_TAG
# CHECK: DW_AT_location [DW_FORM_sec_offset] ({{.*}}
# CHECK-NEXT: [0x00000000, 0x0000000a) ".text": DW_OP_consts +0, DW_OP_stack_value
# CHECK-NEXT: [0x0000000a, 0x00000017) ".text": DW_OP_consts +1, DW_OP_stack_value)
# CHECK-NEXT: DW_AT_name [DW_FORM_strp]{{.*}}"b"
#
# CHECK: .debug_loc contents:
# CHECK: 0x00000000:
# CHECK-NEXT: (0x00000000, 0x0000000a): DW_OP_consts +0, DW_OP_stack_value
# CHECK-NEXT: (0x0000000a, 0x00000017): DW_OP_consts +1, DW_OP_stack_value
# CHECK: 0x00000022:
# CHECK-NEXT: (0x00000009, 0x00000017): DW_OP_breg0 EAX+0, DW_OP_deref
# CHECK-NEXT: (0x00000017, 0x00000043): DW_OP_breg5 EBP-8, DW_OP_deref, DW_OP_deref
--- |
target triple = "i386-unknown-linux-gnu"
%struct.A = type { i32 (...)**, i32 }
; Function Attrs: nounwind
define i32 @_Z3bari(i32 %b) #0 !dbg !10 {
entry:
%b.addr = alloca i32, align 4
store i32 %b, i32* %b.addr, align 4
call void @llvm.dbg.value(metadata i32 0, metadata !14, metadata !DIExpression()), !dbg !15
%0 = load i32, i32* %b.addr, align 4, !dbg !16
call void @llvm.dbg.value(metadata i32 1, metadata !14, metadata !DIExpression()), !dbg !15
%add = add nsw i32 %0, 4, !dbg !16
ret i32 %add, !dbg !16
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
define void @_Z3baz1A(%struct.A* %a) #2 !dbg !17 {
entry:
%z = alloca i32, align 4
call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !20, metadata !DIExpression(DW_OP_deref)), !dbg !21
call void @llvm.dbg.declare(metadata i32* %z, metadata !22, metadata !DIExpression()), !dbg !23
store i32 2, i32* %z, align 4, !dbg !23
%var = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1, !dbg !24
%0 = load i32, i32* %var, align 4, !dbg !24
%cmp = icmp sgt i32 %0, 2, !dbg !24
br i1 %cmp, label %if.then, label %if.end, !dbg !24
if.then: ; preds = %entry
%1 = load i32, i32* %z, align 4, !dbg !26
%inc = add nsw i32 %1, 1, !dbg !26
store i32 %inc, i32* %z, align 4, !dbg !26
br label %if.end, !dbg !26
if.end: ; preds = %if.then, %entry
%call = call signext i8 @_ZN1A3fooEv(%struct.A* %a), !dbg !27
%conv = sext i8 %call to i32, !dbg !27
%cmp1 = icmp eq i32 %conv, 97, !dbg !27
br i1 %cmp1, label %if.then2, label %if.end4, !dbg !27
if.then2: ; preds = %if.end
%2 = load i32, i32* %z, align 4, !dbg !29
%inc3 = add nsw i32 %2, 1, !dbg !29
store i32 %inc3, i32* %z, align 4, !dbg !29
br label %if.end4, !dbg !29
if.end4: ; preds = %if.then2, %if.end
ret void, !dbg !30
}
declare signext i8 @_ZN1A3fooEv(%struct.A*) #2
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #3
attributes #0 = { nounwind "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone speculatable }
attributes #2 = { "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0, !3}
!llvm.module.flags = !{!7, !8}
!llvm.ident = !{!9, !9}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.5.0 (210479)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc")
!2 = !{}
!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 3.5.0 (210479)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !5, globals: !2, imports: !2)
!4 = !DIFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc")
!5 = !{!6}
!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", file: !4, line: 1, flags: DIFlagFwdDecl, identifier: "_ZTS1A")
!7 = !{i32 2, !"Dwarf Version", i32 4}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{!"clang version 3.5.0 (210479)"}
!10 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bari", scope: !1, file: !1, line: 1, type: !11, isLocal: false, isDefinition: true, scopeLine: 1, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!11 = !DISubroutineType(types: !12)
!12 = !{!13, !13}
!13 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!14 = !DILocalVariable(name: "b", arg: 1, scope: !10, file: !1, line: 1, type: !13)
!15 = !DILocation(line: 1, scope: !10)
!16 = !DILocation(line: 2, scope: !10)
!17 = distinct !DISubprogram(name: "baz", linkageName: "_Z3baz1A", scope: !4, file: !4, line: 6, type: !18, isLocal: false, isDefinition: true, scopeLine: 6, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !3, retainedNodes: !2)
!18 = !DISubroutineType(types: !19)
!19 = !{null, !6}
!20 = !DILocalVariable(name: "a", arg: 1, scope: !17, file: !4, line: 6, type: !6)
!21 = !DILocation(line: 6, scope: !17)
!22 = !DILocalVariable(name: "z", scope: !17, file: !4, line: 7, type: !13)
!23 = !DILocation(line: 7, scope: !17)
!24 = !DILocation(line: 8, scope: !25)
!25 = distinct !DILexicalBlock(scope: !17, file: !4, line: 8)
!26 = !DILocation(line: 9, scope: !25)
!27 = !DILocation(line: 10, scope: !28)
!28 = distinct !DILexicalBlock(scope: !17, file: !4, line: 10)
!29 = !DILocation(line: 11, scope: !28)
!30 = !DILocation(line: 12, scope: !17)
...
---
name: _Z3bari
alignment: 16
tracksRegLiveness: true
frameInfo:
stackSize: 8
offsetAdjustment: -4
maxAlignment: 4
maxCallFrameSize: 0
fixedStack:
- { id: 0, type: spill-slot, offset: -8, size: 4, alignment: 8, stack-id: default }
- { id: 1, size: 4, alignment: 16, stack-id: default }
stack:
- { id: 0, type: spill-slot, offset: -12, size: 4, alignment: 4, stack-id: default }
body: |
bb.0.entry:
frame-setup PUSH32r killed $ebp, implicit-def $esp, implicit $esp
CFI_INSTRUCTION def_cfa_offset 8
CFI_INSTRUCTION offset $ebp, -8
$ebp = frame-setup MOV32rr $esp
CFI_INSTRUCTION def_cfa_register $ebp
frame-setup PUSH32r undef $eax, implicit-def $esp, implicit $esp
renamable $eax = MOV32rm $ebp, 1, $noreg, 8, $noreg :: (load 4 from %fixed-stack.1)
DBG_VALUE 0, 0, !14, !DIExpression(), debug-location !15
renamable $ecx = MOV32rm $ebp, 1, $noreg, 8, $noreg, debug-location !16 :: (load 4 from %ir.b.addr)
DBG_VALUE 1, 0, !14, !DIExpression(), debug-location !15
renamable $ecx = ADD32ri8 renamable $ecx, 4, implicit-def $eflags, debug-location !16
MOV32mr $ebp, 1, $noreg, -4, $noreg, killed $eax :: (store 4 into %fixed-stack.1)
$eax = MOV32rr killed $ecx, debug-location !16
$esp = frame-destroy ADD32ri8 $esp, 4, implicit-def dead $eflags, debug-location !16
$ebp = frame-destroy POP32r implicit-def $esp, implicit $esp, debug-location !16
CFI_INSTRUCTION def_cfa $esp, 4, debug-location !16
RETL implicit killed $eax, debug-location !16
...
---
name: _Z3baz1A
alignment: 16
tracksRegLiveness: true
frameInfo:
stackSize: 28
offsetAdjustment: -24
maxAlignment: 4
adjustsStack: true
hasCalls: true
maxCallFrameSize: 4
fixedStack:
- { id: 0, type: spill-slot, offset: -8, size: 4, alignment: 8, stack-id: default }
- { id: 1, size: 4, alignment: 16, stack-id: default, isImmutable: true }
stack:
- { id: 0, name: z, offset: -12, size: 4, alignment: 4, stack-id: default,
debug-info-variable: '!22', debug-info-expression: '!DIExpression()',
debug-info-location: '!23' }
- { id: 1, type: spill-slot, offset: -16, size: 4, alignment: 4, stack-id: default }
body: |
bb.0.entry:
frame-setup PUSH32r killed $ebp, implicit-def $esp, implicit $esp
CFI_INSTRUCTION def_cfa_offset 8
CFI_INSTRUCTION offset $ebp, -8
$ebp = frame-setup MOV32rr $esp
CFI_INSTRUCTION def_cfa_register $ebp
$esp = frame-setup SUB32ri8 $esp, 24, implicit-def dead $eflags
renamable $eax = MOV32rm $ebp, 1, $noreg, 8, $noreg :: (load 4 from %fixed-stack.1)
DBG_VALUE renamable $eax, 0, !20, !DIExpression(DW_OP_deref), debug-location !21
MOV32mi $ebp, 1, $noreg, -4, $noreg, 2, debug-location !23 :: (store 4 into %ir.z)
CMP32mi8 renamable $eax, 1, $noreg, 4, $noreg, 2, implicit-def $eflags, debug-location !24 :: (load 4 from %ir.var)
MOV32mr $ebp, 1, $noreg, -8, $noreg, killed $eax :: (store 4 into %stack.1)
DBG_VALUE $ebp, 0, !20, !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !21
JCC_1 %bb.2, 14, implicit $eflags, debug-location !24
bb.1.if.then:
DBG_VALUE $ebp, 0, !20, !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !21
renamable $eax = MOV32rm $ebp, 1, $noreg, -4, $noreg, debug-location !26 :: (load 4 from %ir.z)
renamable $eax = ADD32ri8 renamable $eax, 1, implicit-def $eflags, debug-location !26
MOV32mr $ebp, 1, $noreg, -4, $noreg, killed renamable $eax, debug-location !26 :: (store 4 into %ir.z)
bb.2.if.end:
DBG_VALUE $ebp, 0, !20, !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !21
$eax = MOV32rm $ebp, 1, $noreg, -8, $noreg :: (load 4 from %stack.1)
MOV32mr $esp, 1, $noreg, 0, $noreg, killed renamable $eax, debug-location !27 :: (store 4 into stack)
CALLpcrel32 @_ZN1A3fooEv, csr_32, implicit $esp, implicit $ssp, implicit-def $al, debug-location !27
renamable $ecx = MOVSX32rr8 killed renamable $al, debug-location !27
CMP32ri8 killed renamable $ecx, 97, implicit-def $eflags, debug-location !27
JCC_1 %bb.4, 5, implicit $eflags, debug-location !27
bb.3.if.then2:
DBG_VALUE $ebp, 0, !20, !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !21
renamable $eax = MOV32rm $ebp, 1, $noreg, -4, $noreg, debug-location !29 :: (load 4 from %ir.z)
renamable $eax = ADD32ri8 renamable $eax, 1, implicit-def $eflags, debug-location !29
MOV32mr $ebp, 1, $noreg, -4, $noreg, killed renamable $eax, debug-location !29 :: (store 4 into %ir.z)
bb.4.if.end4:
DBG_VALUE $ebp, 0, !20, !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !21
$esp = frame-destroy ADD32ri8 $esp, 24, implicit-def dead $eflags, debug-location !30
$ebp = frame-destroy POP32r implicit-def $esp, implicit $esp, debug-location !30
CFI_INSTRUCTION def_cfa $esp, 4, debug-location !30
RETL debug-location !30
...