Overhauled llvm/clang docs builds. Closes PR6613.

NOTE: 2nd part changeset for cfe trunk to follow.

*** PRE-PATCH ISSUES ADDRESSED

- clang api docs fail build from objdir
- clang/llvm api docs collide in install PREFIX/
- clang/llvm main docs collide in install
- clang/llvm main docs have full of hard coded destination
  assumptions and make use of absolute root in static html files;
  namely CommandGuide tools hard codes a website destination
  for cross references and some html cross references assume
  website root paths

*** IMPROVEMENTS

- bumped Doxygen from 1.4.x -> 1.6.3
- splits llvm/clang docs into 'main' and 'api' (doxygen) build trees
- provide consistent, reliable doc builds for both main+api docs
- support buid vs. install vs. website intentions
- support objdir builds
- document targets with 'make help'
- correct clean and uninstall operations
- use recursive dir delete only where absolutely necessary
- added call function fn.RMRF which safeguards against botched 'rm -rf';
  if any target (or any variable is evaluated) which attempts
  to remove any dirs which match a hard-coded 'safelist', a verbose
  error will be printed and make will error-stop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103213 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 30 deletions

diff --git a/docs/HistoricalNotes/2000-12-06-EncodingIdea.txt b/docs/HistoricalNotes/2000-12-06-EncodingIdea.txt
deleted file mode 100644
index 8c452924dd..0000000000
--- a/docs/HistoricalNotes/2000-12-06-EncodingIdea.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-From: Chris Lattner [mailto:sabre@nondot.org]
-Sent: Wednesday, December 06, 2000 6:41 PM
-To: Vikram S. Adve
-Subject: Additional idea with respect to encoding
-
-Here's another idea with respect to keeping the common case instruction
-size down (less than 32 bits ideally):
-
-Instead of encoding an instruction to operate on two register numbers,
-have it operate on two negative offsets based on the current register
-number.  Therefore, instead of using:
-
-r57 = add r55, r56  (r57 is the implicit dest register, of course)
-
-We could use:
-
-r57 = add -2, -1
-
-My guess is that most SSA references are to recent values (especially if
-they correspond to expressions like (x+y*z+p*q/ ...), so the negative
-numbers would tend to stay small, even at the end of the procedure (where
-the implicit register destination number could be quite large).  Of course
-the negative sign is reduntant, so you would be storing small integers
-almost all of the time, and 5-6 bits worth of register number would be
-plenty for most cases...
-
-What do you think?
-
--Chris
-