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This reverts commit r259117.
The LineInfo constructor is defined in the codeview library and we have
to link against it now. Doing that isn't trivial, so reverting for now.
llvm-svn: 259126
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Adds a new family of .cv_* directives to LLVM's variant of GAS syntax:
- .cv_file: Similar to DWARF .file directives
- .cv_loc: Similar to the DWARF .loc directive, but starts with a
function id. CodeView line tables are emitted by function instead of
by compilation unit, so we needed an extra field to communicate this.
Rather than overloading the .loc direction further, we decided it was
better to have our own directive.
- .cv_stringtable: Emits the codeview string table at the current
position. Currently this just contains the filenames as
null-terminated strings.
- .cv_filechecksums: Emits the file checksum table for all files used
with .cv_file so far. There is currently no support for emitting
actual checksums, just filenames.
This moves the line table emission code down into the assembler. This
is in preparation for implementing the inlined call site line table
format. The inline line table format encoding algorithm requires knowing
the absolute code offsets, so it must run after the assembler has laid
out the code.
David Majnemer collaborated on this patch.
llvm-svn: 259117
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The only functional change would be that we might emit multiple filename
segments on code like this:
void f() {
#include "p1/../t.h"
#include "p2/../t.h"
}
I believe these get separate DIFile metadata nodes, but will have the
same canonicalized absolute path. Previously by computing the path up
front and comparing it we would merge the line info segments.
llvm-svn: 257966
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Soon it will be responsible for more than line tables.
Reviewers: majnemer
Differential Revision: http://reviews.llvm.org/D16199
llvm-svn: 257792
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