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LLVM backend for 6502
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cb2fd557ee
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Chris Lattner cb2fd557ee Substantially improve code generation for address exposed locals (aka fixed 
sized allocas in the entry block).  Instead of generating code like this:

entry:
  reg1024 = ESP+1234
... (much later)
  *reg1024 = 17


Generate code that looks like this:
entry:
  (no code generated)
... (much later)
  t = ESP+1234
  *t = 17

The advantage being that we DRAMATICALLY reduce the register pressure for these
silly temporaries (they were all being spilled to the stack, resulting in very
silly code).  This is actually a manual implementation of rematerialization :)

I have a patch to fold the alloca address computation into loads & stores, which
will make this much better still, but just getting this right took way too much time
and I'm sleepy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13554 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-13 07:40:27 +00:00
autoconf Refactor external benchmark checking stuff into one hairy 2004-04-16 17:13:33 +00:00
docs Reduce line length to about 80 chars. 2004-05-13 03:40:27 +00:00
examples/ModuleMaker Configure script for ModuleMaker. 2003-11-25 20:02:07 +00:00
include Fix a comment. 2004-05-12 21:57:23 +00:00
lib Substantially improve code generation for address exposed locals (aka fixed 2004-05-13 07:40:27 +00:00
projects Use inttypes.h, which exists on all of Linux, Solaris and Darwin. 2004-05-11 16:14:53 +00:00
runtime Share the profile info type enum with the C++ analysis libraries. 2004-05-04 16:51:48 +00:00
test Testcase for PR337, which was reduced by Reid Spencer. 2004-05-10 05:11:24 +00:00
tools Turn the block extractor on by default now that it basically works, eliminating the option. 2004-05-12 19:02:44 +00:00
utils Added `zeroinitializer' keyword. 2004-04-28 19:36:08 +00:00
.cvsignore Ok, try #2, this time I'll not be stupid 2003-08-03 18:33:24 +00:00
configure Regenerated using autoconf-2.57. 2004-04-16 17:13:44 +00:00
CREDITS.TXT Just testing the "Reid has CVS commit access" system 2004-05-06 18:06:18 +00:00
LICENSE.TXT Added obsequi. 2004-05-11 19:29:59 +00:00
llvm.spec RPM spec file for LLVM tools and libraries. 2004-02-10 03:57:51 +00:00
llvm.spec.in RPM spec file for LLVM tools and libraries. 2004-02-10 03:57:51 +00:00
Makefile Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
Makefile.common Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
Makefile.config.in Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
Makefile.rules Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
README.txt This file has been superseded by docs/index.html . 2004-05-12 02:48:30 +00:00

README.txt 

This file is a placeholder; see docs/index.html for documentation.