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llvm-6502/test/DebugInfo/X86/nodebug_with_debug_loc.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

140 lines
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; REQUIRES: object-emission
; RUN: llc -mtriple=i386-linux-gnu -filetype=obj -relocation-model=pic %s -o /dev/null
; Derived from the test case in PR20367, there's nothing really positive to
; test here (hence no FileCheck, etc). All that was wrong is that the debug info
; intrinsics (introduced by inlining) in 'f1' were causing codegen to crash, but
; since 'f1' is a nodebug function, there's no positive outcome to confirm, just
; that debug info doesn't get in the way/cause a crash.
; The test case isn't particularly well reduced/tidy, but as simple as I could
; get the C++ source. I assume the complexity is mostly just about producing a
; certain amount of register pressure, so it might be able to be simplified/made
; more uniform.
; Generated from:
; $ clang-tot -cc1 -triple i386 -emit-obj -g -O3 repro.cpp
; void sink(const void *);
; int source();
; void f3(int);
;
; extern bool b;
;
; struct string {
; unsigned *mem;
; };
;
; extern string &str;
;
; inline __attribute__((always_inline)) void s2(string *lhs) { sink(lhs->mem); }
; inline __attribute__((always_inline)) void f() {
; string str2;
; s2(&str2);
; sink(&str2);
; }
; void __attribute__((nodebug)) f1() {
; for (int iter = 0; iter != 2; ++iter) {
; f();
; sink(str.mem);
; if (b) return;
; }
; }
%struct.string = type { i32* }
@str = external constant %struct.string*
@b = external global i8
; Function Attrs: nounwind
define void @_Z2f1v() #0 {
entry:
%str2.i = alloca %struct.string, align 4
%0 = bitcast %struct.string* %str2.i to i8*, !dbg !26
%1 = load %struct.string** @str, align 4
%mem = getelementptr inbounds %struct.string, %struct.string* %1, i32 0, i32 0
br label %for.body
for.body: ; preds = %for.body, %entry
%iter.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
call void @llvm.lifetime.start(i64 4, i8* %0), !dbg !26
call void @llvm.dbg.value(metadata %struct.string* %str2.i, i64 0, metadata !16, metadata !{!"0x102"}) #3, !dbg !26
call void @llvm.dbg.value(metadata %struct.string* %str2.i, i64 0, metadata !27, metadata !{!"0x102"}) #3, !dbg !29
call void @_Z4sinkPKv(i8* undef) #3, !dbg !29
call void @_Z4sinkPKv(i8* %0) #3, !dbg !30
call void @llvm.lifetime.end(i64 4, i8* %0), !dbg !31
%2 = load i32** %mem, align 4, !tbaa !32
%3 = bitcast i32* %2 to i8*
call void @_Z4sinkPKv(i8* %3) #3
%4 = load i8* @b, align 1, !tbaa !37, !range !39
%tobool = icmp ne i8 %4, 0
%inc = add nsw i32 %iter.02, 1
%cmp = icmp eq i32 %inc, 2
%or.cond = or i1 %tobool, %cmp
br i1 %or.cond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
declare void @_Z4sinkPKv(i8*) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
; Function Attrs: nounwind
declare void @llvm.lifetime.start(i64, i8* nocapture) #3
; Function Attrs: nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) #3
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!23, !24}
!llvm.ident = !{!25}
!0 = !{!"0x11\004\00clang version 3.5.0 \001\00\000\00\001", !1, !2, !3, !10, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/<stdin>] [DW_LANG_C_plus_plus]
!1 = !{!"<stdin>", !"/tmp/dbginfo"}
!2 = !{}
!3 = !{!4}
!4 = !{!"0x13\00string\007\0032\0032\000\000\000", !5, null, null, !6, null, null, !"_ZTS6string"} ; [ DW_TAG_structure_type ] [string] [line 7, size 32, align 32, offset 0] [def] [from ]
!5 = !{!"repro.cpp", !"/tmp/dbginfo"}
!6 = !{!7}
!7 = !{!"0xd\00mem\008\0032\0032\000\000", !5, !"_ZTS6string", !8} ; [ DW_TAG_member ] [mem] [line 8, size 32, align 32, offset 0] [from ]
!8 = !{!"0xf\00\000\0032\0032\000\000", null, null, !9} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from unsigned int]
!9 = !{!"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]
!10 = !{!11, !17}
!11 = !{!"0x2e\00f\00f\00_Z1fv\0014\000\001\000\006\00256\001\0014", !5, !12, !13, null, null, null, null, !15} ; [ DW_TAG_subprogram ] [line 14] [def] [f]
!12 = !{!"0x29", !5} ; [ DW_TAG_file_type ] [/tmp/dbginfo/repro.cpp]
!13 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !14, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!14 = !{null}
!15 = !{!16}
!16 = !{!"0x100\00str2\0015\000", !11, !12, !"_ZTS6string"} ; [ DW_TAG_auto_variable ] [str2] [line 15]
!17 = !{!"0x2e\00s2\00s2\00_Z2s2P6string\0013\000\001\000\006\00256\001\0013", !5, !12, !18, null, null, null, null, !21} ; [ DW_TAG_subprogram ] [line 13] [def] [s2]
!18 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !19, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!19 = !{null, !20}
!20 = !{!"0xf\00\000\0032\0032\000\000", null, null, !"_ZTS6string"} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from _ZTS6string]
!21 = !{!22}
!22 = !{!"0x101\00lhs\0016777229\000", !17, !12, !20} ; [ DW_TAG_arg_variable ] [lhs] [line 13]
!23 = !{i32 2, !"Dwarf Version", i32 4}
!24 = !{i32 2, !"Debug Info Version", i32 2}
!25 = !{!"clang version 3.5.0 "}
!26 = !MDLocation(line: 15, scope: !11)
!27 = !{!"0x101\00lhs\0016777229\000", !17, !12, !20, !28} ; [ DW_TAG_arg_variable ] [lhs] [line 13]
!28 = !MDLocation(line: 16, scope: !11)
!29 = !MDLocation(line: 13, scope: !17, inlinedAt: !28)
!30 = !MDLocation(line: 17, scope: !11)
!31 = !MDLocation(line: 18, scope: !11)
!32 = !{!33, !34, i64 0}
!33 = !{!"_ZTS6string", !34, i64 0}
!34 = !{!"any pointer", !35, i64 0}
!35 = !{!"omnipotent char", !36, i64 0}
!36 = !{!"Simple C/C++ TBAA"}
!37 = !{!38, !38, i64 0}
!38 = !{!"bool", !35, i64 0}
!39 = !{i8 0, i8 2}
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