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LLVM backend for 6502
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97ae12a988
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Chris Lattner 97ae12a988 change iterator invalidation avoidance to just move the iterator backward 
when something changes, instead of moving forward.  This allows us to 
simplify memset lowering, inserting the memset at the end of the range of 
stuff we're touching instead of at the start.

This, in turn, allows us to make use of the addressing instructions already
used in the function instead of inserting our own.  For example, we now
codegen:

	%tmp41 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 0		; <i8*> [#uses=2]
	call void @llvm.memset.i64( i8* %tmp41, i8 -1, i64 8, i32 1 )

instead of:

	%tmp20 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 7		; <i8*> [#uses=1]
	%ptroffset = getelementptr i8* %tmp20, i64 -7		; <i8*> [#uses=1]
	call void @llvm.memset.i64( i8* %ptroffset, i8 -1, i64 8, i32 1 )



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48940 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-29 05:15:47 +00:00
autoconf Adding ocamldoc generation. 2008-03-10 15:49:16 +00:00
bindings Expose ExecutionEngine::getTargetData() to c and ocaml bindings. 2008-03-27 00:27:14 +00:00
docs Update example to new syntax. 2008-03-28 06:46:51 +00:00
examples Fix an incorrect comment, PR2147. 2008-03-13 03:29:42 +00:00
include Cosmetic change. 2008-03-29 01:04:05 +00:00
lib change iterator invalidation avoidance to just move the iterator backward 2008-03-29 05:15:47 +00:00
projects remove attributions from the rest of the llvm makefiles. 2007-12-29 20:11:13 +00:00
runtime Fixing the stack walker. 2008-01-24 05:16:36 +00:00
test add a testcase for forming memset from noncontiguous stores. 2008-03-29 04:51:35 +00:00
tools Another test commit (with git-svn) 2008-03-26 21:37:43 +00:00
utils Simplify the conversion from "0x" numbers to a single digit number. 2008-03-28 06:22:23 +00:00
website Prepare for "core" website. 2007-08-03 05:43:35 +00:00
win32 Updating win32 VStudio project files with new file references and removing dead references. 2008-03-27 00:02:53 +00:00
Xcode Update project to reflect deleted files. 2008-03-23 16:49:47 +00:00
build-for-llvm-top.sh Allow the configure options to be set according to the llvm-top options. 2007-08-31 19:53:42 +00:00
configure Regenerate. 2008-03-10 15:49:38 +00:00
CREDITS.TXT Add Mikhail to credits file 2008-03-23 08:58:32 +00:00
LICENSE.TXT scoped_ptr.h was removed. 2008-02-09 22:50:06 +00:00
llvm.spec.in * llvm.spec.in: update blurb 2007-07-13 09:48:29 +00:00
Makefile a happier version of happiness 2008-03-21 22:17:07 +00:00
Makefile.common remove attributions from the rest of the llvm makefiles. 2007-12-29 20:11:13 +00:00
Makefile.config.in Adding ocamldoc generation. 2008-03-10 15:49:16 +00:00
Makefile.rules Refresh Makefile.ocaml in objdir if it is modified in srcdir. 2008-03-10 15:58:40 +00:00
ModuleInfo.txt Update to include clean and install commands. 2007-07-20 20:54:41 +00:00
README.txt test 2007-04-20 20:49:25 +00:00

README.txt 

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

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