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e240cc0b4b
llvm-6502/test/DebugInfo/X86/pr19307.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 -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
; Generated from the source file pr19307.cc:
; #include <string>
; void parse_range(unsigned long long &offset, unsigned long long &limit,
; std::string range) {
; if (range.compare(0, 6, "items=") != 0 || range[6] == '-')
; offset = 1;
; range.erase(0, 6);
; limit = 2;
; }
; with "clang++ -S -emit-llvm -O0 -g pr19307.cc"
; Location of "range" string is spilled from %rdx to stack and is
; addressed via %rbp.
; CHECK: movq %rdx, {{[-0-9]+}}(%rbp)
; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
; This location should be valid until the end of the function.
; Verify that we have proper range in debug_loc section:
; CHECK: .Ldebug_loc{{[0-9]+}}:
; CHECK: DW_OP_breg1
; CHECK: .quad [[START_LABEL]]-.Lfunc_begin0
; CHECK-NEXT: .quad .Lfunc_end0-.Lfunc_begin0
; CHECK: DW_OP_breg6
; CHECK: DW_OP_deref
; ModuleID = 'pr19307.cc'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%"class.std::basic_string" = type { %"struct.std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" }
%"struct.std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* }
@.str = private unnamed_addr constant [7 x i8] c"items=\00", align 1
; Function Attrs: uwtable
define void @_Z11parse_rangeRyS_Ss(i64* %offset, i64* %limit, %"class.std::basic_string"* %range) #0 {
entry:
%offset.addr = alloca i64*, align 8
%limit.addr = alloca i64*, align 8
store i64* %offset, i64** %offset.addr, align 8
call void @llvm.dbg.declare(metadata i64** %offset.addr, metadata !45, metadata !{!"0x102"}), !dbg !46
store i64* %limit, i64** %limit.addr, align 8
call void @llvm.dbg.declare(metadata i64** %limit.addr, metadata !47, metadata !{!"0x102"}), !dbg !46
call void @llvm.dbg.declare(metadata %"class.std::basic_string"* %range, metadata !48, metadata !{!"0x102\006"}), !dbg !49
%call = call i32 @_ZNKSs7compareEmmPKc(%"class.std::basic_string"* %range, i64 0, i64 6, i8* getelementptr inbounds ([7 x i8]* @.str, i32 0, i32 0)), !dbg !50
%cmp = icmp ne i32 %call, 0, !dbg !50
br i1 %cmp, label %if.then, label %lor.lhs.false, !dbg !50
lor.lhs.false: ; preds = %entry
%call1 = call i8* @_ZNSsixEm(%"class.std::basic_string"* %range, i64 6), !dbg !52
%0 = load i8* %call1, !dbg !52
%conv = sext i8 %0 to i32, !dbg !52
%cmp2 = icmp eq i32 %conv, 45, !dbg !52
br i1 %cmp2, label %if.then, label %if.end, !dbg !52
if.then: ; preds = %lor.lhs.false, %entry
%1 = load i64** %offset.addr, align 8, !dbg !54
store i64 1, i64* %1, align 8, !dbg !54
br label %if.end, !dbg !54
if.end: ; preds = %if.then, %lor.lhs.false
%call3 = call %"class.std::basic_string"* @_ZNSs5eraseEmm(%"class.std::basic_string"* %range, i64 0, i64 6), !dbg !55
%2 = load i64** %limit.addr, align 8, !dbg !56
store i64 2, i64* %2, align 8, !dbg !56
ret void, !dbg !57
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare i32 @_ZNKSs7compareEmmPKc(%"class.std::basic_string"*, i64, i64, i8*) #2
declare i8* @_ZNSsixEm(%"class.std::basic_string"*, i64) #2
declare %"class.std::basic_string"* @_ZNSs5eraseEmm(%"class.std::basic_string"*, i64, i64) #2
attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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 }
attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!42, !43}
!llvm.ident = !{!44}
!0 = !{!"0x11\004\00clang version 3.5.0 (209308)\000\00\000\00\001", !1, !2, !3, !12, !2, !21} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/pr19307.cc] [DW_LANG_C_plus_plus]
!1 = !{!"pr19307.cc", !"/llvm_cmake_gcc"}
!2 = !{}
!3 = !{!4, !6, !8}
!4 = !{!"0x13\00\0083\000\000\000\004\000", !5, null, null, null, null, null, !"_ZTS11__mbstate_t"} ; [ DW_TAG_structure_type ] [line 83, size 0, align 0, offset 0] [decl] [from ]
!5 = !{!"/usr/include/wchar.h", !"/llvm_cmake_gcc"}
!6 = !{!"0x13\00lconv\0054\000\000\000\004\000", !7, null, null, null, null, null, !"_ZTS5lconv"} ; [ DW_TAG_structure_type ] [lconv] [line 54, size 0, align 0, offset 0] [decl] [from ]
!7 = !{!"/usr/include/locale.h", !"/llvm_cmake_gcc"}
!8 = !{!"0x2\00basic_string<char, std::char_traits<char>, std::allocator<char> >\001134\000\000\000\004\000", !9, !10, null, null, null, null, !"_ZTSSs"} ; [ DW_TAG_class_type ] [basic_string<char, std::char_traits<char>, std::allocator<char> >] [line 1134, size 0, align 0, offset 0] [decl] [from ]
!9 = !{!"/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/basic_string.tcc", !"/llvm_cmake_gcc"}
!10 = !{!"0x39\00std\00153", !11, null} ; [ DW_TAG_namespace ] [std] [line 153]
!11 = !{!"/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/x86_64-linux-gnu/bits/c++config.h", !"/llvm_cmake_gcc"}
!12 = !{!13}
!13 = !{!"0x2e\00parse_range\00parse_range\00_Z11parse_rangeRyS_Ss\003\000\001\000\006\00256\000\004", !1, !14, !15, null, void (i64*, i64*, %"class.std::basic_string"*)* @_Z11parse_rangeRyS_Ss, null, null, !2} ; [ DW_TAG_subprogram ] [line 3] [def] [scope 4] [parse_range]
!14 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/pr19307.cc]
!15 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !16, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!16 = !{null, !17, !17, !19}
!17 = !{!"0x10\00\000\000\000\000\000", null, null, !18} ; [ DW_TAG_reference_type ] [line 0, size 0, align 0, offset 0] [from long long unsigned int]
!18 = !{!"0x24\00long long unsigned int\000\0064\0064\000\000\007", null, null} ; [ DW_TAG_base_type ] [long long unsigned int] [line 0, size 64, align 64, offset 0, enc DW_ATE_unsigned]
!19 = !{!"0x16\00string\0065\000\000\000\000", !20, !10, !"_ZTSSs"} ; [ DW_TAG_typedef ] [string] [line 65, size 0, align 0, offset 0] [from _ZTSSs]
!20 = !{!"/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/stringfwd.h", !"/llvm_cmake_gcc"}
!21 = !{!22, !26, !29, !33, !38, !41}
!22 = !{!"0x3a\0057\00", !23, !25} ; [ DW_TAG_imported_module ]
!23 = !{!"0x39\00__gnu_debug\0055", !24, null} ; [ DW_TAG_namespace ] [__gnu_debug] [line 55]
!24 = !{!"/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/debug/debug.h", !"/llvm_cmake_gcc"}
!25 = !{!"0x39\00__debug\0049", !24, !10} ; [ DW_TAG_namespace ] [__debug] [line 49]
!26 = !{!"0x8\0066\00", !10, !27} ; [ DW_TAG_imported_declaration ]
!27 = !{!"0x16\00mbstate_t\00106\000\000\000\000", !5, null, !28} ; [ DW_TAG_typedef ] [mbstate_t] [line 106, size 0, align 0, offset 0] [from __mbstate_t]
!28 = !{!"0x16\00__mbstate_t\0095\000\000\000\000", !5, null, !"_ZTS11__mbstate_t"} ; [ DW_TAG_typedef ] [__mbstate_t] [line 95, size 0, align 0, offset 0] [from _ZTS11__mbstate_t]
!29 = !{!"0x8\00141\00", !10, !30} ; [ DW_TAG_imported_declaration ]
!30 = !{!"0x16\00wint_t\00141\000\000\000\000", !31, null, !32} ; [ DW_TAG_typedef ] [wint_t] [line 141, size 0, align 0, offset 0] [from unsigned int]
!31 = !{!"/llvm_cmake_gcc/bin/../lib/clang/3.5.0/include/stddef.h", !"/llvm_cmake_gcc"}
!32 = !{!"0x24\00unsigned int\000\0032\0032\000\000\007", null, null} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned]
!33 = !{!"0x8\0042\00", !34, !36} ; [ DW_TAG_imported_declaration ]
!34 = !{!"0x39\00__gnu_cxx\0069", !35, null} ; [ DW_TAG_namespace ] [__gnu_cxx] [line 69]
!35 = !{!"/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/cpp_type_traits.h", !"/llvm_cmake_gcc"}
!36 = !{!"0x16\00size_t\00155\000\000\000\000", !11, !10, !37} ; [ DW_TAG_typedef ] [size_t] [line 155, size 0, align 0, offset 0] [from long unsigned int]
!37 = !{!"0x24\00long unsigned int\000\0064\0064\000\000\007", null, null} ; [ DW_TAG_base_type ] [long unsigned int] [line 0, size 64, align 64, offset 0, enc DW_ATE_unsigned]
!38 = !{!"0x8\0043\00", !34, !39} ; [ DW_TAG_imported_declaration ]
!39 = !{!"0x16\00ptrdiff_t\00156\000\000\000\000", !11, !10, !40} ; [ DW_TAG_typedef ] [ptrdiff_t] [line 156, size 0, align 0, offset 0] [from long int]
!40 = !{!"0x24\00long int\000\0064\0064\000\000\005", null, null} ; [ DW_TAG_base_type ] [long int] [line 0, size 64, align 64, offset 0, enc DW_ATE_signed]
!41 = !{!"0x8\0055\00", !10, !"_ZTS5lconv"} ; [ DW_TAG_imported_declaration ]
!42 = !{i32 2, !"Dwarf Version", i32 4}
!43 = !{i32 2, !"Debug Info Version", i32 2}
!44 = !{!"clang version 3.5.0 (209308)"}
!45 = !{!"0x101\00offset\0016777219\000", !13, !14, !17} ; [ DW_TAG_arg_variable ] [offset] [line 3]
!46 = !MDLocation(line: 3, scope: !13)
!47 = !{!"0x101\00limit\0033554435\000", !13, !14, !17} ; [ DW_TAG_arg_variable ] [limit] [line 3]
!48 = !{!"0x101\00range\0050331652\000", !13, !14, !19} ; [ DW_TAG_arg_variable ] [range] [line 4]
!49 = !MDLocation(line: 4, scope: !13)
!50 = !MDLocation(line: 5, scope: !51)
!51 = !{!"0xb\005\000\000", !1, !13} ; [ DW_TAG_lexical_block ] [/llvm_cmake_gcc/pr19307.cc]
!52 = !MDLocation(line: 5, scope: !53)
!53 = !{!"0xb\005\000\001", !1, !51} ; [ DW_TAG_lexical_block ] [/llvm_cmake_gcc/pr19307.cc]
!54 = !MDLocation(line: 6, scope: !51)
!55 = !MDLocation(line: 7, scope: !13)
!56 = !MDLocation(line: 8, scope: !13)
!57 = !MDLocation(line: 9, scope: !13)
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