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LLVM backend for 6502
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5d056952ba
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Chris Lattner 5d056952ba optimize single MBB loops better. In particular, produce: 
LBB1_57:        #bb207.i
        movl 72(%esp), %ecx
        movb (%ecx,%eax), %cl
        movl 80(%esp), %edx
        movb %cl, 1(%edx,%eax)
        incl %eax
        cmpl $143, %eax
        jne LBB1_57     #bb207.i
        jmp LBB1_64     #cond_next255.i

intead of:

LBB1_57:        #bb207.i
        movl 72(%esp), %ecx
        movb (%ecx,%eax), %cl
        movl 80(%esp), %edx
        movb %cl, 1(%edx,%eax)
        incl %eax
        cmpl $143, %eax
        je LBB1_64      #cond_next255.i
        jmp LBB1_57     #bb207.i

This eliminates a branch per iteration of the loop.  This hurted PPC
particularly, because the extra branch meant another dispatch group for each
iteration of the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31530 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-08 01:03:21 +00:00
autoconf Bumping version number 2006-11-07 05:31:00 +00:00
docs Add a note about warnings from the GNU ld 2.16.X linker. 2006-11-04 00:33:42 +00:00
examples For PR950: 2006-10-20 07:07:24 +00:00
include/llvm Beautify. 2006-11-08 00:19:31 +00:00
lib optimize single MBB loops better. In particular, produce: 2006-11-08 01:03:21 +00:00
projects Don't check variables before they are set. 2006-11-05 03:58:44 +00:00
runtime Remove unused variable. 2006-11-03 01:58:30 +00:00
test scalarrepl should not split the two elements of the vsiidx array: 2006-11-07 22:42:29 +00:00
tools Fix a problem in the the last patch that subverts error message printing. 2006-11-05 19:53:08 +00:00
utils emit TIED_TO correctly 2006-11-07 01:27:55 +00:00
win32 Remove obsolete VS project. 2006-11-05 19:38:20 +00:00
Xcode Try again. 2006-11-05 21:21:20 +00:00
.cvsignore Add llvm.spec, a generated file. 2006-10-18 19:23:56 +00:00
configure Add a -disable-cbe-printf-a option so that the output of the C Backend 2006-11-05 17:08:18 +00:00
CREDITS.TXT
LICENSE.TXT burg is gone 2006-09-11 17:28:11 +00:00
llvm.spec.in
Makefile Document build order dependencies. Make sure that llvm-config is built before 2006-09-04 04:27:07 +00:00
Makefile.common
Makefile.config.in Get LLVMGCCARCH right regardless of the llvm-gcc version being used. 2006-11-05 20:10:16 +00:00
Makefile.rules For PR786: 2006-11-02 20:25:50 +00:00
README.txt

README.txt 

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

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LLVM is open source software. You may freely distribute it under the terms of
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Please see the HTML documentation provided in docs/index.html for further
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