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Sanjoy Das c32a57361b Use a WeakVH for UnknownInstructions in AliasSetTracker
Summary:
This change solves the same problem as D30726, except that this only
throws out the bathwater.

AST was not correctly tracking and deleting UnknownInstructions via
handles.  The existing code only tracks "pointers" in its
`ASTCallbackVH`, so an UnknownInstruction (that isn't also def'ing a
pointer used by another memory instruction) never gets a
`ASTCallbackVH`.

There are two other ways to solve this problem:

 - Use the `PointerRec` scheme for both known and unknown instructions.
 - Use a `CallbackVH` that erases the offending Instruction from the
   UnknownInstruction list.

Both of the above changes seemed to be significantly (and unnecessarily
IMO) more complex than this.

Reviewers: chandlerc, dberlin, hfinkel, reames

Subscribers: mcrosier, llvm-commits

Differential Revision: https://reviews.llvm.org/D30849

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297539 91177308-0d34-0410-b5e6-96231b3b80d8
2017-03-11 01:15:48 +00:00
bindings [DebugInfo] Emit address space with DW_AT_address_class attribute for pointer and reference types 2017-03-08 23:55:44 +00:00
cmake Respect CMAKE_INSTALL_MANDIR for sphinx generated manpages 2017-03-10 21:44:16 +00:00
docs [FileCheck] Added --enable-var-scope option to enable scope for regex variables. 2017-03-09 17:59:04 +00:00
examples llvm/examples/Kaleidoscope/BuildingAJIT: More fixup corresponding to r295636. 2017-02-20 10:07:41 +00:00
include Use a WeakVH for UnknownInstructions in AliasSetTracker 2017-03-11 01:15:48 +00:00
lib Use a WeakVH for UnknownInstructions in AliasSetTracker 2017-03-11 01:15:48 +00:00
projects [cmake] Include openmp with add_llvm_external_project 2017-03-07 18:54:17 +00:00
resources
runtimes [CMake] Handle common options for runtimes build 2017-01-10 19:47:05 +00:00
test Use a WeakVH for UnknownInstructions in AliasSetTracker 2017-03-11 01:15:48 +00:00
tools [llvm-readobj] Support SHT_MIPS_DWARF section type flag 2017-03-10 08:22:25 +00:00
unittests Fix subreg value numbers in handleMoveUp 2017-03-11 00:14:52 +00:00
utils [FileCheck] Added --enable-var-scope option to enable scope for regex variables. 2017-03-09 17:59:04 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore [.gitignore] Update .gitignore to ignore a nested build directory 2017-02-24 23:09:30 +00:00
CMakeLists.txt remove Cmake option for LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 2017-03-07 00:51:07 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +00:00

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