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LLVM backend for 6502
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Duncan P. N. Exon Smith 85cbe57fc5 IR: Don't track nullptr on metadata RAUW 
The RAUW support in `Metadata` supports going to `nullptr` specifically
to handle values being deleted, causing `ValueAsMetadata` to be deleted.

Fix the case where the reference is from a `TrackingMDRef` (as opposed
to an `MDOperand` or a `MetadataAsValue`).

This is surprisingly rare -- metadata tracked by `TrackingMDRef` going
to null -- but it came up in an openSUSE bootstrap during inlining.  The
tracking ref was held by the `ValueMap` because it was referencing a
local, the basic block containing the local became dead after it had
been merged in, and when the local was deleted, the tracking ref
asserted in an `isa`.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224146 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-12 19:24:33 +00:00
autoconf Require python 2.7. 2014-12-12 15:29:31 +00:00
bindings IR: Split Metadata from Value 2014-12-09 18:38:53 +00:00
cmake Disable --icf=safe to avoid a bug. 2014-12-12 14:28:19 +00:00
docs Require python 2.7. 2014-12-12 15:29:31 +00:00
examples Once more on the cmake build. nativecodegen->native on the dependencies. 2014-12-08 18:24:06 +00:00
include Pass a FD to resise_file and add a testcase. 2014-12-12 17:55:12 +00:00
lib IR: Don't track nullptr on metadata RAUW 2014-12-12 19:24:33 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test Relax debug-map-parsing.test error message check for Windows 2014-12-12 18:52:07 +00:00
tools Initial dsymutil tool commit. 2014-12-12 17:31:24 +00:00
unittests IR: Don't track nullptr on metadata RAUW 2014-12-12 19:24:33 +00:00
utils Now that we require a newer python, use the new exception syntax. 2014-12-12 15:32:23 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt Adding a new option to CMake to disable C++ atexit on llvm-shlib. 2014-12-09 18:49:55 +00:00
CODE_OWNERS.TXT Tom Stellard is now the code owner for libclc. 2014-12-12 01:11:48 +00:00
configure Require python 2.7. 2014-12-12 15:29:31 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
README.txt [TEST-COMMIT] As per Developer Policy, Added a blank line. 2014-12-06 00:38:39 +00:00

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