Commit Graph

7 Commits

Author SHA1 Message Date
Chris Lattner
1afcace3a3 Land the long talked about "type system rewrite" patch. This
patch brings numerous advantages to LLVM.  One way to look at it
is through diffstat:
 109 files changed, 3005 insertions(+), 5906 deletions(-)

Removing almost 3K lines of code is a good thing.  Other advantages
include:

1. Value::getType() is a simple load that can be CSE'd, not a mutating
   union-find operation.
2. Types a uniqued and never move once created, defining away PATypeHolder.
3. Structs can be "named" now, and their name is part of the identity that
   uniques them.  This means that the compiler doesn't merge them structurally
   which makes the IR much less confusing.
4. Now that there is no way to get a cycle in a type graph without a named
   struct type, "upreferences" go away.
5. Type refinement is completely gone, which should make LTO much MUCH faster
   in some common cases with C++ code.
6. Types are now generally immutable, so we can use "Type *" instead 
   "const Type *" everywhere.

Downsides of this patch are that it removes some functions from the C API,
so people using those will have to upgrade to (not yet added) new API.  
"LLVM 3.0" is the right time to do this.

There are still some cleanups pending after this, this patch is large enough
as-is.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134829 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09 17:41:24 +00:00
Dan Gohman
5efe566d9e Use llvm-link -S instead of using llvm-dis.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81860 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-15 15:38:31 +00:00
Reid Spencer
edca80b5e8 For PR1319: Upgrade to new test harness
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36073 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-15 18:11:57 +00:00
Chris Lattner
413c76f3bc Correct test. use "not grep" instead of "grep -v"
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13824 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-27 07:32:25 +00:00
Misha Brukman
b6cb66f1c3 Renamed as' => llvm-as', dis' => llvm-dis', link' => llvm-link'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8545 91177308-0d34-0410-b5e6-96231b3b80d8
2003-09-15 20:04:28 +00:00
John Criswell
e3e7c474f2 Checkin of autoconf-style object root.
Updated TestRunner tests so that they work correctly in a separate object root
directory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8383 91177308-0d34-0410-b5e6-96231b3b80d8
2003-09-06 15:15:04 +00:00
Chris Lattner
233bfb2696 New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5440 91177308-0d34-0410-b5e6-96231b3b80d8
2003-01-30 20:03:15 +00:00