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llvm-6502/test/DebugInfo/X86/decl-derived-member.ll
David Blaikie 198d8baafb [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction 
One of several parallel first steps to remove the target type of pointers,
replacing them with a single opaque pointer type.

This adds an explicit type parameter to the gep instruction so that when the
first parameter becomes an opaque pointer type, the type to gep through is
still available to the instructions.

* This doesn't modify gep operators, only instructions (operators will be
  handled separately)

* Textual IR changes only. Bitcode (including upgrade) and changing the
  in-memory representation will be in separate changes.

* geps of vectors are transformed as:
    getelementptr <4 x float*> %x, ...
  ->getelementptr float, <4 x float*> %x, ...
  Then, once the opaque pointer type is introduced, this will ultimately look
  like:
    getelementptr float, <4 x ptr> %x
  with the unambiguous interpretation that it is a vector of pointers to float.

* address spaces remain on the pointer, not the type:
    getelementptr float addrspace(1)* %x
  ->getelementptr float, float addrspace(1)* %x
  Then, eventually:
    getelementptr float, ptr addrspace(1) %x

Importantly, the massive amount of test case churn has been automated by
same crappy python code. I had to manually update a few test cases that
wouldn't fit the script's model (r228970,r229196,r229197,r229198). The
python script just massages stdin and writes the result to stdout, I
then wrapped that in a shell script to handle replacing files, then
using the usual find+xargs to migrate all the files.

update.py:
import fileinput
import sys
import re

ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")
normrep = re.compile(       r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")

def conv(match, line):
  if not match:
    return line
  line = match.groups()[0]
  if len(match.groups()[5]) == 0:
    line += match.groups()[2]
  line += match.groups()[3]
  line += ", "
  line += match.groups()[1]
  line += "\n"
  return line

for line in sys.stdin:
  if line.find("getelementptr ") == line.find("getelementptr inbounds"):
    if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("):
      line = conv(re.match(ibrep, line), line)
  elif line.find("getelementptr ") != line.find("getelementptr ("):
    line = conv(re.match(normrep, line), line)
  sys.stdout.write(line)

apply.sh:
for name in "$@"
do
  python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name"
  rm -f "$name.tmp"
done

The actual commands:
From llvm/src:
find test/ -name *.ll | xargs ./apply.sh
From llvm/src/tools/clang:
find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}"
From llvm/src/tools/polly:
find test/ -name *.ll | xargs ./apply.sh

After that, check-all (with llvm, clang, clang-tools-extra, lld,
compiler-rt, and polly all checked out).

The extra 'rm' in the apply.sh script is due to a few files in clang's test
suite using interesting unicode stuff that my python script was throwing
exceptions on. None of those files needed to be migrated, so it seemed
sufficient to ignore those cases.

Reviewers: rafael, dexonsmith, grosser

Differential Revision: http://reviews.llvm.org/D7636

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230786 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 19:29:02 +00:00

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; REQUIRES: object-emission
; RUN: llc -mtriple x86_64-pc-linux -O0 -filetype=obj %s -o %t
; RUN: llvm-dwarfdump %t | FileCheck %s
; Testcase from:
; struct base {
; virtual ~base();
; };
; typedef base base_type;
; struct foo {
; base_type b;
; };
; foo f;
; Where member b should be seen as a field at an offset and not a bitfield.
; CHECK: DW_TAG_member
; CHECK: DW_AT_name{{.*}}"b"
; CHECK-NOT: DW_AT_bit_offset
%struct.foo = type { %struct.base }
%struct.base = type { i32 (...)** }
$_ZN3fooC2Ev = comdat any
$_ZN3fooD2Ev = comdat any
$_ZN4baseC2Ev = comdat any
@f = global %struct.foo zeroinitializer, align 8
@__dso_handle = external global i8
@_ZTV4base = external unnamed_addr constant [4 x i8*]
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_decl_derived_member.cpp, i8* null }]
define internal void @__cxx_global_var_init() section ".text.startup" {
entry:
call void @_ZN3fooC2Ev(%struct.foo* @f) #2, !dbg !33
%0 = call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.foo*)* @_ZN3fooD2Ev to void (i8*)*), i8* bitcast (%struct.foo* @f to i8*), i8* @__dso_handle) #2, !dbg !33
ret void, !dbg !33
}
; Function Attrs: inlinehint nounwind uwtable
define linkonce_odr void @_ZN3fooC2Ev(%struct.foo* %this) unnamed_addr #0 comdat align 2 {
entry:
%this.addr = alloca %struct.foo*, align 8
store %struct.foo* %this, %struct.foo** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !34, metadata !36), !dbg !37
%this1 = load %struct.foo** %this.addr
%b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !38
call void @_ZN4baseC2Ev(%struct.base* %b) #2, !dbg !38
ret void, !dbg !38
}
; Function Attrs: inlinehint uwtable
define linkonce_odr void @_ZN3fooD2Ev(%struct.foo* %this) unnamed_addr #1 comdat align 2 {
entry:
%this.addr = alloca %struct.foo*, align 8
store %struct.foo* %this, %struct.foo** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !39, metadata !36), !dbg !40
%this1 = load %struct.foo** %this.addr
%b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !41
call void @_ZN4baseD1Ev(%struct.base* %b), !dbg !41
ret void, !dbg !43
}
; Function Attrs: nounwind
declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*) #2
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
; Function Attrs: inlinehint nounwind uwtable
define linkonce_odr void @_ZN4baseC2Ev(%struct.base* %this) unnamed_addr #0 comdat align 2 {
entry:
%this.addr = alloca %struct.base*, align 8
store %struct.base* %this, %struct.base** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.base** %this.addr, metadata !44, metadata !36), !dbg !46
%this1 = load %struct.base** %this.addr
%0 = bitcast %struct.base* %this1 to i32 (...)***, !dbg !47
store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*]* @_ZTV4base, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, !dbg !47
ret void, !dbg !47
}
declare void @_ZN4baseD1Ev(%struct.base*) #4
define internal void @_GLOBAL__sub_I_decl_derived_member.cpp() section ".text.startup" {
entry:
call void @__cxx_global_var_init(), !dbg !48
ret void
}
attributes #0 = { inlinehint nounwind 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 = { inlinehint 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 #2 = { nounwind }
attributes #3 = { nounwind readnone }
attributes #4 = { "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 = !{!30, !31}
!llvm.ident = !{!32}
!0 = !{!"0x11\004\00clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)\000\00\000\00\001", !1, !2, !3, !9, !28, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/decl-derived-member.cpp] [DW_LANG_C_plus_plus]
!1 = !{!"decl-derived-member.cpp", !"/tmp/dbginfo"}
!2 = !{}
!3 = !{!4, !8}
!4 = !{!"0x13\00foo\005\0064\0064\000\000\000", !1, null, null, !5, null, null, !"_ZTS3foo"} ; [ DW_TAG_structure_type ] [foo] [line 5, size 64, align 64, offset 0] [def] [from ]
!5 = !{!6}
!6 = !{!"0xd\00b\006\0064\0064\000\000", !1, !"_ZTS3foo", !7} ; [ DW_TAG_member ] [b] [line 6, size 64, align 64, offset 0] [from base_type]
!7 = !{!"0x16\00base_type\004\000\000\000\000", !1, null, !"_ZTS4base"} ; [ DW_TAG_typedef ] [base_type] [line 4, size 0, align 0, offset 0] [from _ZTS4base]
!8 = !{!"0x13\00base\001\000\000\000\004\000", !1, null, null, null, null, null, !"_ZTS4base"} ; [ DW_TAG_structure_type ] [base] [line 1, size 0, align 0, offset 0] [decl] [from ]
!9 = !{!10, !14, !19, !24, !26}
!10 = !{!"0x2e\00__cxx_global_var_init\00__cxx_global_var_init\00\008\001\001\000\000\00256\000\008", !1, !11, !12, null, void ()* @__cxx_global_var_init, null, null, !2} ; [ DW_TAG_subprogram ] [line 8] [local] [def] [__cxx_global_var_init]
!11 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/decl-derived-member.cpp]
!12 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !13, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!13 = !{null}
!14 = !{!"0x2e\00foo\00foo\00_ZN3fooC2Ev\005\000\001\000\000\00320\000\005", !1, !"_ZTS3foo", !15, null, void (%struct.foo*)* @_ZN3fooC2Ev, null, !18, !2} ; [ DW_TAG_subprogram ] [line 5] [def] [foo]
!15 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !16, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!16 = !{null, !17}
!17 = !{!"0xf\00\000\0064\0064\000\001088\00", null, null, !"_ZTS3foo"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS3foo]
!18 = !{!"0x2e\00foo\00foo\00\000\000\000\000\000\00320\000\000", null, !"_ZTS3foo", !15, null, null, null, null, null} ; [ DW_TAG_subprogram ] [line 0] [foo]
!19 = !{!"0x2e\00base\00base\00_ZN4baseC2Ev\001\000\001\000\000\00320\000\001", !1, !"_ZTS4base", !20, null, void (%struct.base*)* @_ZN4baseC2Ev, null, !23, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [base]
!20 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !21, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!21 = !{null, !22}
!22 = !{!"0xf\00\000\0064\0064\000\001088\00", null, null, !"_ZTS4base"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS4base]
!23 = !{!"0x2e\00base\00base\00\000\000\000\000\000\00320\000\000", null, !"_ZTS4base", !20, null, null, null, null, null} ; [ DW_TAG_subprogram ] [line 0] [base]
!24 = !{!"0x2e\00~foo\00~foo\00_ZN3fooD2Ev\005\000\001\000\000\00320\000\005", !1, !"_ZTS3foo", !15, null, void (%struct.foo*)* @_ZN3fooD2Ev, null, !25, !2} ; [ DW_TAG_subprogram ] [line 5] [def] [~foo]
!25 = !{!"0x2e\00~foo\00~foo\00\000\000\000\000\000\00320\000\000", null, !"_ZTS3foo", !15, null, null, null, null, null} ; [ DW_TAG_subprogram ] [line 0] [~foo]
!26 = !{!"0x2e\00\00\00_GLOBAL__sub_I_decl_derived_member.cpp\000\001\001\000\000\0064\000\000", !1, !11, !27, null, void ()* @_GLOBAL__sub_I_decl_derived_member.cpp, null, null, !2} ; [ DW_TAG_subprogram ] [line 0] [local] [def]
!27 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!28 = !{!29}
!29 = !{!"0x34\00f\00f\00\008\000\001", null, !11, !"_ZTS3foo", %struct.foo* @f, null} ; [ DW_TAG_variable ] [f] [line 8] [def]
!30 = !{i32 2, !"Dwarf Version", i32 4}
!31 = !{i32 2, !"Debug Info Version", i32 2}
!32 = !{!"clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)"}
!33 = !MDLocation(line: 8, column: 5, scope: !10)
!34 = !{!"0x101\00this\0016777216\001088", !14, null, !35} ; [ DW_TAG_arg_variable ] [this] [line 0]
!35 = !{!"0xf\00\000\0064\0064\000\000", null, null, !"_ZTS3foo"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS3foo]
!36 = !{!"0x102"} ; [ DW_TAG_expression ]
!37 = !MDLocation(line: 0, scope: !14)
!38 = !MDLocation(line: 5, column: 8, scope: !14)
!39 = !{!"0x101\00this\0016777216\001088", !24, null, !35} ; [ DW_TAG_arg_variable ] [this] [line 0]
!40 = !MDLocation(line: 0, scope: !24)
!41 = !MDLocation(line: 5, column: 8, scope: !42)
!42 = !{!"0xb\005\008\002", !1, !24} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/decl-derived-member.cpp]
!43 = !MDLocation(line: 5, column: 8, scope: !24)
!44 = !{!"0x101\00this\0016777216\001088", !19, null, !45} ; [ DW_TAG_arg_variable ] [this] [line 0]
!45 = !{!"0xf\00\000\0064\0064\000\000", null, null, !"_ZTS4base"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS4base]
!46 = !MDLocation(line: 0, scope: !19)
!47 = !MDLocation(line: 1, column: 8, scope: !19)
!48 = !MDLocation(line: 0, scope: !26)
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