6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-24 22:24:54 +00:00
Code Issues Projects Releases Wiki Activity

IR: Change MDFile to directly store the filename/directory

Browse Source 
In the old (well, current) schema, there are two types of file
references: untagged and tagged (the latter references the former).

    !0 = !{!"filename", !"/directory"}
    !1 = !{!"0x29", !1} ; DW_TAG_file_type [filename] [/directory]

The interface to `DIBuilder` universally takes the tagged version,
described by `DIFile`.  However, most `file:` references actually use
the untagged version directly.

In the new hierarchy, I'm merging this into a single node: `MDFile`.

Originally I'd planned to keep the old schema unchanged until after I
moved the new hierarchy into place.

However, it turns out to be trivial to make `MDFile` match both nodes at
the same time.

  - Anyone referencing !1 does so through `DIFile`, whose implementation
    I need to gut anyway (as I do the rest of the `DIDescriptor`s).
  - Anyone referencing !0 just references an `MDNode`, and expects a
    node with two `MDString` operands.

This commit achieves that, and updates all the testcases for the parts
of the new hierarchy that used the two-node schema (I've replaced the
untagged nodes with `distinct !{}` to make the diff clear (otherwise the
metadata all gets renumbered); it might be worthwhile to come back and
delete those nodes and renumber the world, not sure).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230057 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-02-20 20:35:17 +00:00
parent 5a81e14385
commit 99f12691dd
10 changed files with 33 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
include/llvm/IR/DebugInfoMetadata.h
View File

@@ -754,25 +754,11 @@ public:
TempMDFile clone() const { return cloneImpl(); }
MDTuple *getFileNode() const { return cast<MDTuple>(getOperand(0)); }
StringRef getFilename() const { return getStringOperand(0); }
StringRef getDirectory() const { return getStringOperand(1); }
StringRef getFilename() const {
if (auto *S = getRawFilename())
return S->getString();
return StringRef();
}
StringRef getDirectory() const {
if (auto *S = getRawDirectory())
return S->getString();
return StringRef();
}
MDString *getRawFilename() const {
return cast_or_null<MDString>(getFileNode()->getOperand(0));
}
MDString *getRawDirectory() const {
return cast_or_null<MDString>(getFileNode()->getOperand(1));
}
MDString *getRawFilename() const { return getOperandAs<MDString>(0); }
MDString *getRawDirectory() const { return getOperandAs<MDString>(1); }
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == MDFileKind;