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LLVM backend for 6502
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7b4ad94282
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Chris Lattner 7b4ad94282 Fix a problem that Dan Berlin noticed, where reassociation would not succeed 
in building maximal expressions before simplifying them.  In particular, i
cases like this:

X-(A+B+X)

the code would consider A+B+X to be a maximal expression (not understanding
that the single use '-' would be turned into a + later), simplify it (a noop)
then later get simplified again.

Each of these simplify steps is where the cost of reassociation comes from,
so this patch should speed up the already fast pass a bit.

Thanks to Dan for noticing this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23214 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 07:07:58 +00:00
autoconf For PR619: 2005-08-24 10:43:10 +00:00
docs Changed unsigned long to unsigned. 2005-08-26 09:25:54 +00:00
examples For PR616: 2005-08-24 10:07:20 +00:00
include/llvm Fix VC++ build errors 2005-09-02 02:51:42 +00:00
lib Fix a problem that Dan Berlin noticed, where reassociation would not succeed 2005-09-02 07:07:58 +00:00
projects Implement PR614: 2005-08-27 18:50:39 +00:00
runtime Remove trailing whitespace 2005-04-21 23:48:37 +00:00
test new testcase for recent bugfix 2005-09-02 06:12:12 +00:00
tools 1. Use SubtargetFeatures in llc/lli. 2005-09-01 21:38:21 +00:00
utils Implement PR614: 2005-08-27 18:50:39 +00:00
win32 Fix VC++ build errors 2005-09-02 02:51:42 +00:00
Xcode 1. Use SubtargetFeatures in llc/lli. 2005-09-01 21:38:21 +00:00
.cvsignore Ignore the configure.out file generated by "make reconfigure" 2005-06-18 23:01:25 +00:00
configure For PR616: 2005-08-24 10:07:20 +00:00
CREDITS.TXT Add a note, people are responsible for requesting that they be added to the 2005-08-02 22:10:21 +00:00
LICENSE.TXT Remove extraneous colons after program names for consistency 2005-05-12 21:39:01 +00:00
llvm.spec Onward to LLVM-1.6 and beyond! 2005-05-18 20:23:20 +00:00
llvm.spec.in Onward to LLVM-1.6 and beyond! 2005-05-18 20:23:20 +00:00
Makefile For PR614: 2005-08-25 04:59:49 +00:00
Makefile.common
Makefile.config.in Two changes: 2005-04-22 17:14:14 +00:00
Makefile.rules Implement PR614: 2005-08-27 18:50:39 +00:00
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