David Majnemer 2dacece9e2 [IR] Add token types ... This introduces the basic functionality to support "token types". The motivation stems from the need to perform operations on a Value whose provenance cannot be obscured. There are several applications for such a type but my immediate motivation stems from WinEH. Our personality routine enforces a single-entry - single-exit regime for cleanups. After several rounds of optimizations, we may be left with a terminator whose "cleanup-entry block" is not entirely clear because control flow has merged two cleanups together. We have experimented with using labels as operands inside of instructions which are not terminators to indicate where we came from but found that LLVM does not expect such exotic uses of BasicBlocks. Instead, we can use this new type to clearly associate the "entry point" and "exit point" of our cleanup. This is done by having the cleanuppad yield a Token and consuming it at the cleanupret. The token type makes it impossible to obscure or otherwise hide the Value, making it trivial to track the relationship between the two points. What is the burden to the optimizer? Well, it turns out we have already paid down this cost by accepting that there are certain calls that we are not permitted to duplicate, optimizations have to watch out for such instructions anyway. There are additional places in the optimizer that we will probably have to update but early examination has given me the impression that this will not be heroic. Differential Revision: http://reviews.llvm.org/D11861 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245029 91177308-0d34-0410-b5e6-96231b3b80d8		2015-08-14 05:09:07 +00:00
..
Analysis	[IR] Add token types	2015-08-14 05:09:07 +00:00
AsmParser	[IR] Add token types	2015-08-14 05:09:07 +00:00
Bitcode	[IR] Add token types	2015-08-14 05:09:07 +00:00
CodeGen	[PM/AA] Hoist the interface to TBAA into a dedicated header along with	2015-08-14 03:33:48 +00:00
DebugInfo	Fix some comment typos.	2015-08-08 18:27:36 +00:00
ExecutionEngine	Remove and forbid raw_svector_ostream::flush() calls.	2015-08-13 18:12:56 +00:00
Fuzzer	Fix missing space in libfuzzer's help text.	2015-08-12 20:00:10 +00:00
IR	[IR] Add token types	2015-08-14 05:09:07 +00:00
IRReader
LibDriver	There is only one saver of strings.	2015-08-13 01:07:02 +00:00
LineEditor
Linker	Linker: Move distinct MDNodes instead of cloning	2015-08-03 17:09:38 +00:00
LTO	Remove access to the DataLayout in the TargetMachine	2015-07-24 16:04:22 +00:00
MC	Remove and forbid raw_svector_ostream::flush() calls.	2015-08-13 18:12:56 +00:00
Object	Convert getSymbolSection to return an ErrorOr.	2015-08-07 23:27:14 +00:00
Option	Add an ArgList::AddAllArgs that accepts a vector of OptSpecifier.	2015-07-29 17:34:41 +00:00
Passes
ProfileData
Support	Fix GCC warning: extra `;' [-Wpedantic].	2015-08-13 18:10:19 +00:00
TableGen	TableGen: Support folding casts from bits to int	2015-07-31 01:12:06 +00:00
Target	[IR] Add token types	2015-08-14 05:09:07 +00:00
Transforms	[IR] Add token types	2015-08-14 05:09:07 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile