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Commit Graph

6 Commits

Author SHA1 Message Date
Sanjoy Das
ab2d156691 Revert "[FaultMaps] Move FaultMapParser to Object/"
This reverts commit r240364 (git c49542e5bb186).  The issue r240364 was
trying to fix was fixed independently in r240362.

llvm-svn: 240448
2015-06-23 20:09:03 +00:00
Sanjoy Das
2f4fb64dc2 [FaultMaps] Move FaultMapParser to Object/
Summary:
That way llvm-objdump can rely on it without adding an extra dependency
on CodeGen.

This change duplicates the FaultKind enum and the code that serializes
it to a string.  I could not figure out a way to get around this without
adding a new dependency to Object

Reviewers: rafael, ab

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10619

llvm-svn: 240364
2015-06-23 01:05:26 +00:00
Sanjoy Das
5b9b760961 Fix MSVC build.
I had some unnecessary `typename`s left in after addressing review.
This compiled successfully with clang++ but MSVC reported an error.  Fix
the build error by removing the redundant `typename`s.

llvm-svn: 240307
2015-06-22 18:20:10 +00:00
Sanjoy Das
bea61317e9 [FaultMaps] Add a parser for the __llvm__faultmaps section.
Summary:
The parser is exercised by llvm-objdump using -print-fault-maps.  As is
probably obvious, the code itself was "heavily inspired" by
http://reviews.llvm.org/D10434.

Reviewers: reames, atrick, JosephTremoulet

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10491

llvm-svn: 240304
2015-06-22 18:03:02 +00:00
Sanjoy Das
a95063f8bb Unbreak the build from r239740.
Do not re-use an enum name as a field name.  Some bots don't like this.

llvm-svn: 239746
2015-06-15 19:29:44 +00:00
Sanjoy Das
b396b9e375 [CodeGen] Introduce a FAULTING_LOAD_OP pseudo-op.
Summary:
This instruction encodes a loading operation that may fault, and a label
to branch to if the load page-faults.  The locations of potentially
faulting loads and their "handler" destinations are recorded in a
FaultMap section, meant to be consumed by LLVM's clients.

Nothing generates FAULTING_LOAD_OP instructions yet, but they will be
used in a future change.

The documentation (FaultMaps.rst) needs improvement and I will update
this diff with a more expanded version shortly.

Depends on D10196

Reviewers: rnk, reames, AndyAyers, ab, atrick, pgavlin

Reviewed By: atrick, pgavlin

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10197

llvm-svn: 239740
2015-06-15 18:44:08 +00:00