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Author SHA1 Message Date
Erich Keane 0a6b5b653e PTH-- Remove feature entirely- 
When debugging a boost build with a modified
version of Clang, I discovered that the PTH implementation
stores TokenKind in 8 bits. However, we currently have 368
TokenKinds.

The result is that the value gets truncated and the wrong token
gets picked up when including PTH files. It seems that this will
go wrong every time someone uses a token that uses the 9th bit.

Upon asking on IRC, it was brought up that this was a highly
experimental features that was considered a failure. I discovered
via googling that BoostBuild (mostly Boost.Math) is the only user of
this
feature, using the CC1 flag directly. I believe that this can be
transferred over to normal PCH with minimal effort:
https://github.com/boostorg/build/issues/367

Based on advice on IRC and research showing that this is a nearly
completely unused feature, this patch removes it entirely.

Note: I considered leaving the build-flags in place and making them
emit an error/warning, however since I've basically identified and
warned the only user, it seemed better to just remove them.

Differential Revision: https://reviews.llvm.org/D54547

Change-Id: If32744275ef1f585357bd6c1c813d96973c4d8d9
llvm-svn: 348266
 2018-12-04 14:34:09 +00:00
Pavel Chupin 10a8404771 Remove trailing spaces 
llvm-svn: 212911
 2014-07-13 17:11:45 +00:00
Douglas Gregor 1288408984 Remove an uninteresting note 
llvm-svn: 174441
 2013-02-05 21:13:55 +00:00
Andy Gibbs 40808197c0 Fix typo (test commit) 
llvm-svn: 166181
 2012-10-18 15:24:46 +00:00
John McCall 8831303e4f Add a note about a missing optimization in the case of virtual 
inheritance.

llvm-svn: 153722
 2012-03-30 04:25:03 +00:00
John McCall fabe079108 Make a note about a missing optimization. 
llvm-svn: 136340
 2011-07-28 07:41:22 +00:00
Duncan Sands 86f86f532a A Release-Asserts build is now called a Release build. 
llvm-svn: 107760
 2010-07-07 07:49:17 +00:00
Daniel Dunbar 3c6d1b52a0 Remove clang-cc tool, it has joined in unholy union with clang. 
- tools/driver will be renamed to tools/clang at some point.

llvm-svn: 91195
 2009-12-12 00:56:47 +00:00
Ken Dyck 8d6d4b84e2 add missing slashes to separator line; also testing commit access 
llvm-svn: 88675
 2009-11-13 18:50:18 +00:00
John McCall 86a69495a3 Update the PTH performance "script". 
llvm-svn: 82718
 2009-09-24 22:03:45 +00:00
Chris Lattner 5b0de55045 remove some overly-crazy ideas. 
llvm-svn: 63614
 2009-02-03 06:05:34 +00:00
Chris Lattner 3feddd91f7 remove an irrelevant idea 
llvm-svn: 62400
 2009-01-17 03:46:44 +00:00
Chris Lattner 972347d4f1 Random note so I remember how to do this :) 
llvm-svn: 62344
 2009-01-16 19:33:59 +00:00
Anders Carlsson 8ec6a6ffe9 Add note about asm constraints. 
llvm-svn: 48324
 2008-03-13 03:45:48 +00:00
Chris Lattner e4a6b18c2e secondary targets are gone, simplify this. 
llvm-svn: 48067
 2008-03-09 01:36:43 +00:00
Chris Lattner 855d024a83 Remove the first layer of support for "portability" warnings. This is 
theoretically useful, but not useful in practice.  It adds a bunch of 
complexity, and not much value.  It's best to nuke it.  One big advantage
is that it means the target interfaces will soon lose their SLoc arguments
and target queries can never emit diagnostics anymore (yay).  Removing this
also simplifies some of the core preprocessor which should make it slightly
faster.

Ted, I didn't simplify TripleProcessor, which can now have at most one
triple, and can probably just be removed.  Please poke at it when you have
time.

llvm-svn: 47930
 2008-03-05 01:18:20 +00:00
Nate Begeman a338594236 Completed note 
llvm-svn: 47120
 2008-02-14 08:19:48 +00:00
Chris Lattner f14ba63620 add a note 
llvm-svn: 45953
 2008-01-14 06:27:57 +00:00
Ted Kremenek 8cdc08ea49 Added some notes on the -triple and -arch options. 
llvm-svn: 44554
 2007-12-03 22:26:16 +00:00
Chris Lattner 28404cf449 Test commit 
llvm-svn: 39738
 2007-07-11 17:31:59 +00:00
Chris Lattner 4eeeabbc28 test commit 
llvm-svn: 39347
 2007-03-02 23:14:38 +00:00
Chris Lattner 52f3dc1ee3 add a note 
llvm-svn: 39179
 2006-11-19 01:17:45 +00:00
Chris Lattner bacf0bfe45 add a note 
llvm-svn: 39144
 2006-11-08 05:53:27 +00:00
Chris Lattner f78e6035da move some content around to make README more focused 
llvm-svn: 39130
 2006-11-05 17:54:43 +00:00
Chris Lattner 00a6be6f7b test again 
llvm-svn: 39072
 2006-10-27 18:09:32 +00:00
Chris Lattner a0ed5fe382 test 
llvm-svn: 39071
 2006-10-27 18:03:57 +00:00
Chris Lattner 91e911ad75 test 
llvm-svn: 39070
 2006-10-27 18:00:23 +00:00
Chris Lattner 4856a42489 add notes 
llvm-svn: 38990
 2006-10-15 22:34:29 +00:00
Chris Lattner dad3c45adc update portability notes 
llvm-svn: 38988
 2006-10-15 01:13:14 +00:00
Chris Lattner 2ddda73d40 add some notes. 
llvm-svn: 38986
 2006-10-15 01:05:06 +00:00
Chris Lattner 58360339bd define extensions 
llvm-svn: 38983
 2006-10-14 19:53:48 +00:00
Chris Lattner bfe9860bec add some notes about the portability model 
llvm-svn: 38977
 2006-10-14 17:39:56 +00:00
Chris Lattner db878cde8e Add an interesting observation :) 
llvm-svn: 38692
 2006-07-10 06:34:50 +00:00
Chris Lattner ecbf7b4bb0 add newline to end of file 
llvm-svn: 38675
 2006-07-05 00:08:00 +00:00
Chris Lattner ecc6fc583f add a place for random notes. 
llvm-svn: 38661
 2006-07-04 19:29:50 +00:00