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llvm-6502/test/DebugInfo/X86/dbg_value_direct.ll
Adrian Prantl e240cc0b4b Remove support for DIVariable's FlagIndirectVariable and expect 
frontends to use a DIExpression with a DW_OP_deref instead.

This is not only a much more natural place for this informationl; there
is also a technical reason: The FlagIndirectVariable is used to mark a
variable that is turned into a reference by virtue of the calling
convention; this happens for example to aggregate return values.
The inliner, for example, may actually need to undo this indirection to
correctly represent the value in its new context. This is impossible to
implement because the DIVariable can't be safely modified. We can however
safely construct a new DIExpression on the fly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226476 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-19 17:57:29 +00:00

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; RUN: llc -filetype=obj -O0 < %s
; Test that we handle DBG_VALUEs in a register without crashing.
;
; Generated from clang with -fsanitize=address:
; struct A {
; A();
; A(const A&);
; };
;
; A func(int) {
; A a;
; return a;
; }
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%struct.A = type { i8 }
@__asan_mapping_offset = linkonce_odr constant i64 2147450880
@__asan_mapping_scale = linkonce_odr constant i64 3
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
@__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 5 .addr \00", align 1
; Function Attrs: sanitize_address uwtable
define void @_Z4funci(%struct.A* noalias sret %agg.result, i32) #0 "stack-protector-buffer-size"="1" {
entry:
%MyAlloca = alloca [96 x i8], align 32
%1 = ptrtoint [96 x i8]* %MyAlloca to i64
%2 = add i64 %1, 32
%3 = inttoptr i64 %2 to i32*
%4 = inttoptr i64 %1 to i64*
store i64 1102416563, i64* %4
%5 = add i64 %1, 8
%6 = inttoptr i64 %5 to i64*
store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %6
%7 = add i64 %1, 16
%8 = inttoptr i64 %7 to i64*
store i64 ptrtoint (void (%struct.A*, i32)* @_Z4funci to i64), i64* %8
%9 = lshr i64 %1, 3
%10 = add i64 %9, 2147450880
%11 = inttoptr i64 %10 to i32*
store i32 -235802127, i32* %11
%12 = add i64 %10, 4
%13 = inttoptr i64 %12 to i32*
store i32 -185273340, i32* %13
%14 = add i64 %10, 8
%15 = inttoptr i64 %14 to i32*
store i32 -202116109, i32* %15
%16 = ptrtoint i32* %3 to i64
%17 = lshr i64 %16, 3
%18 = add i64 %17, 2147450880
%19 = inttoptr i64 %18 to i8*
%20 = load i8* %19
%21 = icmp ne i8 %20, 0
call void @llvm.dbg.declare(metadata i32* %3, metadata !23, metadata !28)
br i1 %21, label %22, label %28
; <label>:22 ; preds = %entry
%23 = and i64 %16, 7
%24 = add i64 %23, 3
%25 = trunc i64 %24 to i8
%26 = icmp sge i8 %25, %20
br i1 %26, label %27, label %28
; <label>:27 ; preds = %22
call void @__asan_report_store4(i64 %16)
call void asm sideeffect "", ""()
unreachable
; <label>:28 ; preds = %22, %entry
store i32 %0, i32* %3, align 4
call void @llvm.dbg.declare(metadata %struct.A* %agg.result, metadata !24, metadata !{!"0x102\006"}), !dbg !25
call void @_ZN1AC1Ev(%struct.A* %agg.result), !dbg !25
store i64 1172321806, i64* %4, !dbg !26
%29 = inttoptr i64 %10 to i32*, !dbg !26
store i32 0, i32* %29, !dbg !26
%30 = add i64 %10, 4, !dbg !26
%31 = inttoptr i64 %30 to i32*, !dbg !26
store i32 0, i32* %31, !dbg !26
%32 = add i64 %10, 8, !dbg !26
%33 = inttoptr i64 %32 to i32*, !dbg !26
store i32 0, i32* %33, !dbg !26
ret void, !dbg !26
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare void @_ZN1AC1Ev(%struct.A*) #2
define internal void @asan.module_ctor() "stack-protector-buffer-size"="1" {
call void @__asan_init_v3()
%1 = load volatile i64* @__asan_mapping_offset
%2 = load volatile i64* @__asan_mapping_scale
ret void
}
declare void @__asan_init_v3()
declare void @__asan_report_load1(i64)
declare void @__asan_report_load2(i64)
declare void @__asan_report_load4(i64)
declare void @__asan_report_load8(i64)
declare void @__asan_report_load16(i64)
declare void @__asan_report_store1(i64)
declare void @__asan_report_store2(i64)
declare void @__asan_report_store4(i64)
declare void @__asan_report_store8(i64)
declare void @__asan_report_store16(i64)
declare void @__asan_report_load_n(i64, i64)
declare void @__asan_report_store_n(i64, i64)
declare void @__asan_handle_no_return()
declare i64 @__asan_stack_malloc(i64, i64)
declare void @__asan_stack_free(i64, i64, i64)
declare void @__asan_poison_stack_memory(i64, i64)
declare void @__asan_unpoison_stack_memory(i64, i64)
declare void @__asan_before_dynamic_init(i64)
declare void @__asan_after_dynamic_init()
declare void @__asan_register_globals(i64, i64)
declare void @__asan_unregister_globals(i64, i64)
attributes #0 = { sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "ssp-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "ssp-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!22, !27}
!0 = !{!"0x11\004\00clang version 3.4 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/crash.cpp] [DW_LANG_C_plus_plus]
!1 = !{!"crash.cpp", !"/tmp"}
!2 = !{}
!3 = !{!4}
!4 = !{!"0x2e\00func\00func\00_Z4funci\006\000\001\000\006\00256\000\006", !1, !5, !6, null, void (%struct.A*, i32)* @_Z4funci, null, null, !2} ; [ DW_TAG_subprogram ] [line 6] [def] [func]
!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/crash.cpp]
!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = !{!8, !21}
!8 = !{!"0x13\00A\001\008\008\000\000\000", !1, null, null, !9, null, null, null} ; [ DW_TAG_structure_type ] [A] [line 1, size 8, align 8, offset 0] [def] [from ]
!9 = !{!10, !15}
!10 = !{!"0x2e\00A\00A\00\002\000\000\000\006\00256\000\002", !1, !8, !11, null, null, null, i32 0, !14} ; [ DW_TAG_subprogram ] [line 2] [A]
!11 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !12, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!12 = !{null, !13}
!13 = !{!"0xf\00\000\0064\0064\000\001088", i32 0, null, !8} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from A]
!14 = !{i32 786468}
!15 = !{!"0x2e\00A\00A\00\003\000\000\000\006\00256\000\003", !1, !8, !16, null, null, null, i32 0, !20} ; [ DW_TAG_subprogram ] [line 3] [A]
!16 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !17, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!17 = !{null, !13, !18}
!18 = !{!"0x10\00\000\000\000\000\000", null, null, !19} ; [ DW_TAG_reference_type ] [line 0, size 0, align 0, offset 0] [from ]
!19 = !{!"0x26\00\000\000\000\000\000", null, null, !8} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from A]
!20 = !{i32 786468}
!21 = !{!"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]
!22 = !{i32 2, !"Dwarf Version", i32 3}
!23 = !{!"0x101\00\0016777222\000", !4, !5, !21} ; [ DW_TAG_arg_variable ] [line 6]
!24 = !{!"0x100\00a\007\000", !4, !5, !8} ; [ DW_TAG_auto_variable ] [a] [line 7]
!25 = !MDLocation(line: 7, scope: !4)
!26 = !MDLocation(line: 8, scope: !4)
!27 = !{i32 1, !"Debug Info Version", i32 2}
!28 = !{!"0x102\006"} ; [ DW_TAG_expression ] [DW_OP_deref]
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