7 Commits

Author	SHA1	Message	Date
Chris Lattner	cbec3b00bd	Put register classes in namespaces ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22924 91177308-0d34-0410-b5e6-96231b3b80d8	2005-08-19 18:50:46 +00:00
Duraid Madina	e8fd25f5c5	* OK, after changing to use liveIn/liveOut instead of IDEFs, ... to avoid redundant mov out3=r44 type instructions, we need to tell the register allocator the truth about out? registers. FIXME: unfortunately, since the list of allocatable registers is immutable, we can't simply 'delete r127' from the allocation order, say, if 'out0' is used. The only correct thing we can do is have a linear order of regs: out7, out6 ... out2, out1, out0, r32, r33, r34 ... r126, r127 and slide a 'window' of 96 registers along this line, depending on how many of the out? regs a function actually uses. The only downside of this is that the out? registers will be allocated _first_, which makes the resulting assembly ugly. :( Note this in the README. Hope this gets fixed soon. :) (note the 3rd person speech there) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21252 91177308-0d34-0410-b5e6-96231b3b80d8	2005-04-12 18:42:59 +00:00
Chris Lattner	9c24ba642e	Put out* into the allocation order, allowing the register allocator to ... coallesce moves into outgoing args. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21249 91177308-0d34-0410-b5e6-96231b3b80d8	2005-04-12 15:12:51 +00:00
Duraid Madina	ca494fddcd	stop emitting IDEFs for args - change to using liveIn/liveOut ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21247 91177308-0d34-0410-b5e6-96231b3b80d8	2005-04-12 14:54:44 +00:00
Duraid Madina	e00e5ded51	ok, the "ia64 has a boatload of registers" joke stopped being funny today ;) ... * fix overallocation of integer (stacked) registers: we can't allocate registers for local use if they are required as output registers this fixes 'toast' in the test suite, and all sorts of larger programs like bzip2 etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21178 91177308-0d34-0410-b5e6-96231b3b80d8	2005-04-09 11:53:00 +00:00
Duraid Madina	4ee131ffa8	make sure 'special' registers don't get allocated ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21109 91177308-0d34-0410-b5e6-96231b3b80d8	2005-04-06 06:17:54 +00:00
Duraid Madina	9b9d45f60e	and so it begins... ... PHASE 1: write instruction selector PHASE 2: ??? PHASE 3: profit! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20652 91177308-0d34-0410-b5e6-96231b3b80d8	2005-03-17 18:17:03 +00:00