# RUN: llc -o - %s -start-after=livedebugvalues -O0 -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
# RUN: llc -o - %s -start-after=livedebugvalues -O0 -mtriple=x86_64-unknown-linux-gnu -filetype=obj \
# RUN: | llvm-dwarfdump -debug-info - | FileCheck %s --check-prefix=DWARF
#
# Verify that we have correct debug info for local variables in code
# instrumented with AddressSanitizer.
#
# Generated from the source file test.cc:
# int bar(int y) {
# return y + 2;
# }
# with "clang++ -S -emit-llvm -mllvm -asan-skip-promotable-allocas=0 -fsanitize=address -O0 -g test.cc"
#
# The address of the (potentially now malloc'ed) alloca ends up
# in rdi, after which it is spilled to the stack. We record the
# spill OFFSET on the stack for checking the debug info below.
# CHECK: #DEBUG_VALUE: bar:y <- [DW_OP_deref] [$rcx+0]
# CHECK: movq %rcx, [[OFFSET:[0-9]+]](%rsp)
# CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
# CHECK-NEXT: #DEBUG_VALUE: bar:y <- [DW_OP_plus_uconst [[OFFSET]], DW_OP_deref, DW_OP_deref]
# This location should be valid until the end of the function.
#
# CHECK: movq %rbp, %rsp
# CHECK-NEXT: [[END_LABEL:.Ltmp[0-9]+]]:
#
# CHECK: .Ldebug_loc{{[0-9]+}}:
# We expect two location ranges for the variable.
#
# First, its address is stored in %rcx:
# CHECK: .quad .Ltmp0-.Lfunc_begin0
# CHECK-NEXT: .quad [[START_LABEL]]-.Lfunc_begin0
# CHECK: DW_OP_breg2
# DWARF: DW_TAG_formal_parameter
# DWARF: DW_AT_location
# DWARF-NEXT: [{{.*}}, {{.*}}): DW_OP_breg2 RCX+0, DW_OP_deref
#
# Then it's addressed via %rsp:
# CHECK: .quad [[START_LABEL]]-.Lfunc_begin0
# CHECK-NEXT: .quad [[END_LABEL]]-.Lfunc_begin0
# CHECK: DW_OP_breg7
# CHECK-NEXT: [[OFFSET]]
# CHECK: DW_OP_deref
# DWARF-NEXT: [{{.*}}, {{.*}}): DW_OP_breg7 RSP+{{[0-9]+}}, DW_OP_deref, DW_OP_deref)
--- |
@__asan_option_detect_stack_use_after_return = external global i32
@___asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1
; Function Attrs: nounwind sanitize_address uwtable
define i32 @_Z3bari(i32 %y) #0 !dbg !6 {
entry:
%MyAlloca = alloca [64 x i8], align 32
%0 = ptrtoint [64 x i8]* %MyAlloca to i64
%1 = load i32, i32* @__asan_option_detect_stack_use_after_return
%2 = icmp ne i32 %1, 0
br i1 %2, label %3, label %5
; <label>:3: ; preds = %entry
%4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0)
br label %5
; <label>:5: ; preds = %3, %entry
%6 = phi i64 [ %0, %entry ], [ %4, %3 ]
%7 = add i64 %6, 32
%8 = inttoptr i64 %7 to i32*
%9 = inttoptr i64 %6 to i64*
store i64 1102416563, i64* %9
%10 = add i64 %6, 8
%11 = inttoptr i64 %10 to i64*
store i64 ptrtoint ([16 x i8]* @___asan_gen_ to i64), i64* %11
%12 = add i64 %6, 16
%13 = inttoptr i64 %12 to i64*
store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13
%14 = lshr i64 %6, 3
%15 = add i64 %14, 2147450880
%16 = add i64 %15, 0
%17 = inttoptr i64 %16 to i64*
store i64 -868083100587789839, i64* %17
%18 = ptrtoint i32* %8 to i64
%19 = lshr i64 %18, 3
%20 = add i64 %19, 2147450880
%21 = inttoptr i64 %20 to i8*
%22 = load i8, i8* %21
%23 = icmp ne i8 %22, 0
call void @llvm.dbg.declare(metadata i32* %8, metadata !10, metadata !DIExpression(DW_OP_deref)), !dbg !11
br i1 %23, label %24, label %30
; <label>:24: ; preds = %5
%25 = and i64 %18, 7
%26 = add i64 %25, 3
%27 = trunc i64 %26 to i8
%28 = icmp sge i8 %27, %22
br i1 %28, label %29, label %30
; <label>:29: ; preds = %24
call void @__asan_report_store4(i64 %18)
call void asm sideeffect "", ""()
unreachable
; <label>:30: ; preds = %24, %5
store i32 %y, i32* %8, align 4
%31 = ptrtoint i32* %8 to i64, !dbg !12
%32 = lshr i64 %31, 3, !dbg !12
%33 = add i64 %32, 2147450880, !dbg !12
%34 = inttoptr i64 %33 to i8*, !dbg !12
%35 = load i8, i8* %34, !dbg !12
%36 = icmp ne i8 %35, 0, !dbg !12
br i1 %36, label %37, label %43, !dbg !12
; <label>:37: ; preds = %30
%38 = and i64 %31, 7, !dbg !12
%39 = add i64 %38, 3, !dbg !12
%40 = trunc i64 %39 to i8, !dbg !12
%41 = icmp sge i8 %40, %35, !dbg !12
br i1 %41, label %42, label %43
; <label>:42: ; preds = %37
call void @__asan_report_load4(i64 %31), !dbg !12
call void asm sideeffect "", ""()
unreachable
; <label>:43: ; preds = %37, %30
%44 = load i32, i32* %8, align 4, !dbg !12
%add = add nsw i32 %44, 2, !dbg !12
store i64 1172321806, i64* %9, !dbg !12
%45 = icmp ne i64 %6, %0, !dbg !12
br i1 %45, label %46, label %53, !dbg !12
; <label>:46: ; preds = %43
%47 = add i64 %15, 0, !dbg !12
%48 = inttoptr i64 %47 to i64*, !dbg !12
store i64 -723401728380766731, i64* %48, !dbg !12
%49 = add i64 %6, 56, !dbg !12
%50 = inttoptr i64 %49 to i64*, !dbg !12
%51 = load i64, i64* %50, !dbg !12
%52 = inttoptr i64 %51 to i8*, !dbg !12
store i8 0, i8* %52, !dbg !12
br label %56, !dbg !12
; <label>:53: ; preds = %43
%54 = add i64 %15, 0, !dbg !12
%55 = inttoptr i64 %54 to i64*, !dbg !12
store i64 0, i64* %55, !dbg !12
br label %56, !dbg !12
; <label>:56: ; preds = %53, %46
ret i32 %add, !dbg !12
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare void @__asan_init_v3()
declare void @__asan_report_load4(i64)
declare void @__asan_report_store4(i64)
declare i64 @__asan_stack_malloc_0(i64, i64)
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #2
attributes #0 = { nounwind sanitize_address uwtable "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 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!llvm.ident = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.5.0 (209308)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{!"clang version 3.5.0 (209308)"}
!6 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bari", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!7 = !DISubroutineType(types: !8)
!8 = !{!9, !9}
!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!10 = !DILocalVariable(name: "y", arg: 1, scope: !6, file: !1, line: 1, type: !9)
!11 = !DILocation(line: 0, scope: !6)
!12 = !DILocation(line: 2, scope: !6)
...
---
name: _Z3bari
alignment: 16
tracksRegLiveness: true
liveins:
- { reg: '$edi' }
frameInfo:
stackSize: 152
offsetAdjustment: -160
maxAlignment: 32
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default }
stack:
- { id: 0, name: MyAlloca, offset: -96, size: 64, alignment: 32, stack-id: default }
- { id: 1, type: spill-slot, offset: -100, size: 4, alignment: 4, stack-id: default }
- { id: 2, type: spill-slot, offset: -112, size: 8, alignment: 8, stack-id: default }
- { id: 3, type: spill-slot, offset: -120, size: 8, alignment: 8, stack-id: default }
- { id: 4, type: spill-slot, offset: -128, size: 8, alignment: 8, stack-id: default }
- { id: 5, type: spill-slot, offset: -136, size: 8, alignment: 8, stack-id: default }
- { id: 6, type: spill-slot, offset: -144, size: 8, alignment: 8, stack-id: default }
- { id: 7, type: spill-slot, offset: -145, size: 1, alignment: 1, stack-id: default }
- { id: 8, type: spill-slot, offset: -146, size: 1, alignment: 1, stack-id: default }
- { id: 9, type: spill-slot, offset: -152, size: 4, alignment: 4, stack-id: default }
body: |
bb.0.entry:
liveins: $edi
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
$rsp = frame-setup AND64ri8 $rsp, -32, implicit-def dead $eflags
$rsp = frame-setup SUB64ri32 $rsp, 160, implicit-def dead $eflags
renamable $rax = LEA64r $rsp, 1, $noreg, 64, $noreg
CMP32mi8 $noreg, 1, $noreg, @__asan_option_detect_stack_use_after_return, $noreg, 0, implicit-def $eflags :: (load (s32) from @__asan_option_detect_stack_use_after_return)
$rcx = MOV64rr $rax
MOV32mr $rsp, 1, $noreg, 60, $noreg, killed $edi :: (store (s32) into %stack.1)
MOV64mr $rsp, 1, $noreg, 48, $noreg, killed $rax :: (store (s64) into %stack.2)
MOV64mr $rsp, 1, $noreg, 40, $noreg, killed $rcx :: (store (s64) into %stack.3)
JCC_1 %bb.2, 4, implicit $eflags
bb.1 (%ir-block.3):
$edi = MOV32ri 64, implicit-def $rdi
$rsi = MOV64rm $rsp, 1, $noreg, 48, $noreg :: (load (s64) from %stack.2)
CALL64pcrel32 @__asan_stack_malloc_0, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit-def $rax
MOV64mr $rsp, 1, $noreg, 40, $noreg, killed $rax :: (store (s64) into %stack.3)
bb.2 (%ir-block.5):
$rax = MOV64rm $rsp, 1, $noreg, 40, $noreg :: (load (s64) from %stack.3)
$rcx = MOV64rr $rax
renamable $rcx = ADD64ri8 renamable $rcx, 32, implicit-def $eflags
MOV64mi32 renamable $rax, 1, $noreg, 0, $noreg, 1102416563 :: (store (s64) into %ir.9)
renamable $rdx = MOV64ri @___asan_gen_
MOV64mr renamable $rax, 1, $noreg, 8, $noreg, killed renamable $rdx :: (store (s64) into %ir.11)
renamable $rdx = MOV64ri @_Z3bari
MOV64mr renamable $rax, 1, $noreg, 16, $noreg, killed renamable $rdx :: (store (s64) into %ir.13)
$rdx = MOV64rr $rax
renamable $rdx = SHR64ri renamable $rdx, 3, implicit-def $eflags
$rsi = MOV64rr $rdx
renamable $rsi = ADD64ri32 renamable $rsi, 2147450880, implicit-def $eflags
renamable $rdi = MOV64ri -868083100587789839
MOV64mr killed renamable $rdx, 1, $noreg, 2147450880, $noreg, killed renamable $rdi :: (store (s64) into %ir.17)
$rdx = MOV64rr $rcx
renamable $rdx = SHR64ri renamable $rdx, 3, implicit-def $eflags
renamable $r8b = MOV8rm killed renamable $rdx, 1, $noreg, 2147450880, $noreg :: (load (s8) from %ir.21)
DBG_VALUE renamable $rcx, 0, !10, !DIExpression(DW_OP_deref), debug-location !11
CMP8ri renamable $r8b, 0, implicit-def $eflags
MOV64mr $rsp, 1, $noreg, 32, $noreg, killed $rax :: (store (s64) into %stack.4)
MOV64mr $rsp, 1, $noreg, 24, $noreg, killed $rcx :: (store (s64) into %stack.5)
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
MOV64mr $rsp, 1, $noreg, 16, $noreg, killed $rsi :: (store (s64) into %stack.6)
MOV8mr $rsp, 1, $noreg, 15, $noreg, killed $r8b :: (store (s8) into %stack.7)
JCC_1 %bb.5, 4, implicit $eflags
bb.3 (%ir-block.24):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rax = MOV64rm $rsp, 1, $noreg, 24, $noreg :: (load (s64) from %stack.5)
renamable $rax = AND64ri8 renamable $rax, 7, implicit-def $eflags
renamable $rax = ADD64ri8 renamable $rax, 3, implicit-def $eflags
$cl = MOV8rr $al, implicit killed $rax
$dl = MOV8rm $rsp, 1, $noreg, 15, $noreg :: (load (s8) from %stack.7)
CMP8rr killed renamable $cl, killed renamable $dl, implicit-def $eflags
JCC_1 %bb.5, 12, implicit $eflags
bb.4 (%ir-block.29):
successors:
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rdi = MOV64rm $rsp, 1, $noreg, 24, $noreg :: (load (s64) from %stack.5)
CALL64pcrel32 @__asan_report_store4, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi
INLINEASM &"", 1
bb.5 (%ir-block.30):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rax = MOV64rm $rsp, 1, $noreg, 24, $noreg :: (load (s64) from %stack.5)
$ecx = MOV32rm $rsp, 1, $noreg, 60, $noreg :: (load (s32) from %stack.1)
MOV32mr renamable $rax, 1, $noreg, 0, $noreg, killed renamable $ecx :: (store (s32) into %ir.8)
renamable $rax = SHR64ri renamable $rax, 3, implicit-def $eflags, debug-location !12
renamable $dl = MOV8rm killed renamable $rax, 1, $noreg, 2147450880, $noreg, debug-location !12 :: (load (s8) from %ir.34)
CMP8ri renamable $dl, 0, implicit-def $eflags, debug-location !12
MOV8mr $rsp, 1, $noreg, 14, $noreg, killed $dl :: (store (s8) into %stack.8)
JCC_1 %bb.8, 4, implicit $eflags, debug-location !12
bb.6 (%ir-block.37):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rax = MOV64rm $rsp, 1, $noreg, 24, $noreg :: (load (s64) from %stack.5)
renamable $rax = AND64ri8 renamable $rax, 7, implicit-def $eflags, debug-location !12
renamable $rax = ADD64ri8 renamable $rax, 3, implicit-def $eflags, debug-location !12
$cl = MOV8rr $al, implicit killed $rax, debug-location !12
$dl = MOV8rm $rsp, 1, $noreg, 14, $noreg :: (load (s8) from %stack.8)
CMP8rr killed renamable $cl, killed renamable $dl, implicit-def $eflags, debug-location !12
JCC_1 %bb.8, 12, implicit $eflags
bb.7 (%ir-block.42):
successors:
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rdi = MOV64rm $rsp, 1, $noreg, 24, $noreg :: (load (s64) from %stack.5)
CALL64pcrel32 @__asan_report_load4, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, debug-location !12
INLINEASM &"", 1
bb.8 (%ir-block.43):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rax = MOV64rm $rsp, 1, $noreg, 24, $noreg :: (load (s64) from %stack.5)
renamable $ecx = MOV32rm killed renamable $rax, 1, $noreg, 0, $noreg, debug-location !12 :: (load (s32) from %ir.8)
renamable $ecx = ADD32ri8 renamable $ecx, 2, implicit-def $eflags, debug-location !12
$rdx = MOV64rm $rsp, 1, $noreg, 32, $noreg :: (load (s64) from %stack.4)
MOV64mi32 renamable $rdx, 1, $noreg, 0, $noreg, 1172321806, debug-location !12 :: (store (s64) into %ir.9)
$rsi = MOV64rm $rsp, 1, $noreg, 48, $noreg :: (load (s64) from %stack.2)
CMP64rr killed renamable $rdx, killed renamable $rsi, implicit-def $eflags, debug-location !12
MOV32mr $rsp, 1, $noreg, 8, $noreg, killed $ecx :: (store (s32) into %stack.9)
JCC_1 %bb.10, 4, implicit $eflags, debug-location !12
bb.9 (%ir-block.46):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
renamable $rax = MOV64ri -723401728380766731, debug-location !12
$rcx = MOV64rm $rsp, 1, $noreg, 16, $noreg :: (load (s64) from %stack.6)
MOV64mr killed renamable $rcx, 1, $noreg, 0, $noreg, killed renamable $rax, debug-location !12 :: (store (s64) into %ir.48)
$rax = MOV64rm $rsp, 1, $noreg, 32, $noreg :: (load (s64) from %stack.4)
renamable $rdx = MOV64rm killed renamable $rax, 1, $noreg, 56, $noreg, debug-location !12 :: (load (s64) from %ir.50)
MOV8mi killed renamable $rdx, 1, $noreg, 0, $noreg, 0, debug-location !12 :: (store (s8) into %ir.52)
JMP_1 %bb.11, debug-location !12
bb.10 (%ir-block.53):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$rax = MOV64rm $rsp, 1, $noreg, 16, $noreg :: (load (s64) from %stack.6)
MOV64mi32 killed renamable $rax, 1, $noreg, 0, $noreg, 0, debug-location !12 :: (store (s64) into %ir.55)
bb.11 (%ir-block.56):
DBG_VALUE $rsp, 0, !10, !DIExpression(DW_OP_plus_uconst, 24, DW_OP_deref, DW_OP_deref), debug-location !11
$eax = MOV32rm $rsp, 1, $noreg, 8, $noreg :: (load (s32) from %stack.9)
$rsp = MOV64rr $rbp, debug-location !12
$rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !12
CFI_INSTRUCTION def_cfa $rsp, 8, debug-location !12
RET64 implicit killed $eax, debug-location !12
...