test/Instrumentation/SanitizerCoverage/coverage-dbg.ll

; Test that coverage instrumentation does not lose debug location.

; RUN: opt < %s -sancov -sanitizer-coverage-level=1 -S | FileCheck %s

; C++ source:
; 1: struct A {
; 2:  int f();
; 3:  int x;
; 4: };
; 5:
; 6: int A::f() {
; 7:    return x;
; 8: }
; clang++ ../1.cc -O3 -g -S -emit-llvm  -fno-strict-aliasing
; and add sanitize_address to @_ZN1A1fEv

; Test that __sanitizer_cov call has !dbg pointing to the opening { of A::f().
; CHECK: call void @__sanitizer_cov(i32*{{.*}}), !dbg [[A:!.*]]
; CHECK: [[A]] = !MDLocation(line: 6, scope: !{{.*}})


target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%struct.A = type { i32 }

; Function Attrs: nounwind readonly uwtable
define i32 @_ZN1A1fEv(%struct.A* nocapture readonly %this) #0 align 2 {
entry:
  tail call void @llvm.dbg.value(metadata %struct.A* %this, i64 0, metadata !15, metadata !{!"0x102"}), !dbg !20
  %x = getelementptr inbounds %struct.A* %this, i64 0, i32 0, !dbg !21
  %0 = load i32* %x, align 4, !dbg !21
  ret i32 %0, !dbg !21
}

; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1

attributes #0 = { sanitize_address nounwind readonly uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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 }

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!17, !18}
!llvm.ident = !{!19}

!0 = !{!"0x11\004\00clang version 3.5.0 (210251)\001\00\000\00\001", !1, !2, !3, !12, !2, !2} ; [ DW_TAG_compile_unit ] [/code/llvm/build0/../1.cc] [DW_LANG_C_plus_plus]
!1 = !{!"../1.cc", !"/code/llvm/build0"}
!2 = !{}
!3 = !{!4}
!4 = !{!"0x13\00A\001\0032\0032\000\000\000", !1, null, null, !5, null, null, !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from ]
!5 = !{!6, !8}
!6 = !{!"0xd\00x\003\0032\0032\000\000", !1, !"_ZTS1A", !7} ; [ DW_TAG_member ] [x] [line 3, size 32, align 32, offset 0] [from int]
!7 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!8 = !{!"0x2e\00f\00f\00_ZN1A1fEv\002\000\000\000\006\00256\001\002", !1, !"_ZTS1A", !9, null, null, null, i32 0, null} ; [ DW_TAG_subprogram ] [line 2] [f]
!9 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !10, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!10 = !{!7, !11}
!11 = !{!"0xf\00\000\0064\0064\000\001088", null, null, !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS1A]
!12 = !{!13}
!13 = !{!"0x2e\00f\00f\00_ZN1A1fEv\006\000\001\000\006\00256\001\006", !1, !"_ZTS1A", !9, null, i32 (%struct.A*)* @_ZN1A1fEv, null, !8, !14} ; [ DW_TAG_subprogram ] [line 6] [def] [f]
!14 = !{!15}
!15 = !{!"0x101\00this\0016777216\001088", !13, null, !16} ; [ DW_TAG_arg_variable ] [this] [line 0]
!16 = !{!"0xf\00\000\0064\0064\000\000", null, null, !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS1A]
!17 = !{i32 2, !"Dwarf Version", i32 4}
!18 = !{i32 2, !"Debug Info Version", i32 2}
!19 = !{!"clang version 3.5.0 (210251)"}
!20 = !MDLocation(line: 0, scope: !13)
!21 = !MDLocation(line: 7, scope: !13)