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LLVM backend for 6502
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f4f5a77fdc
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Chris Lattner f4f5a77fdc Two changes: 
1. Implement InstCombine/deadcode.ll by not adding instructions in unreachable
   blocks (due to constants in conditional branches/switches) to the worklist.
   This causes them to be deleted before instcombine starts up, leading to
   better optimization.

2. In the prepass over instructions, do trivial constprop/dce as we go.  This
   has the effect of improving the effectiveness of #1.  In addition, it
   *significantly* speeds up instcombine on test cases with large amounts of
   constant folding code (for example, that produced by code specialization
   or partial evaluation).  In one example, it speeds up instcombine from
   0.0589s to 0.0224s with a release build (a 2.6x speedup).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28215 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-10 19:00:36 +00:00
autoconf Use the -dumpversion option to llvm-gcc which gives us just the version # 2006-05-09 00:31:01 +00:00
docs Actually, semantical doesn't appear to be a word. 2006-04-26 21:03:17 +00:00
examples Minor corrections. 2006-03-24 03:11:31 +00:00
include/llvm Add alloca/malloc ctors that don't take array sizes. 2006-05-10 04:38:35 +00:00
lib Two changes: 2006-05-10 19:00:36 +00:00
projects Have the AutoRegen.sh script prompt the user for the LLVM src and obj 2006-04-18 06:27:47 +00:00
runtime Invert the tests on LLVMGCC_MAJVERS to check for value 4 instead of value 2006-04-07 21:45:23 +00:00
test New testcase, check that dead code doesn't pessimize instcombine 2006-05-10 18:56:04 +00:00
tools wrap long line 2006-05-04 23:35:31 +00:00
utils Watch out for the following case: 2006-05-10 02:47:57 +00:00
win32 Keep Visual Studio happy. 2006-05-03 00:28:50 +00:00
Xcode Misc. project changes. html + build config changes supplied by Devang. 2006-04-08 06:04:56 +00:00
.cvsignore Ignore stuff built by "make dist". 2006-04-07 15:55:18 +00:00
configure Use the -dumpversion option to llvm-gcc which gives us just the version # 2006-05-09 00:31:01 +00:00
CREDITS.TXT quick update 2006-04-13 02:05:30 +00:00
LICENSE.TXT Changing domain name 2006-04-20 05:51:53 +00:00
llvm.spec For PR723: 2006-04-07 16:07:37 +00:00
llvm.spec.in For PR723: 2006-04-07 16:07:37 +00:00
Makefile Include the win32 and Xcode directories in the distribution. 2006-04-12 20:53:14 +00:00
Makefile.common Update comments to reflect new variable names. Patch contributed by 2005-02-14 16:02:19 +00:00
Makefile.config.in Fix a comment. 2006-04-09 23:39:43 +00:00
Makefile.rules Remove traces of Burg utility now that its gone and not needed. 2006-04-20 18:42:24 +00:00
README.txt

README.txt 

Low Level Virtual Machine (LLVM)
================================

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