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LLVM backend for 6502
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d64ba3ee62
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Bill Wendling d64ba3ee62 It's an error to translate this: 
%reg1025 = <sext> %reg1024
    ...
   %reg1026 = SUBREG_TO_REG 0, %reg1024, 4

into this:

   %reg1025 = <sext> %reg1024
    ...
   %reg1027 = EXTRACT_SUBREG %reg1025, 4
   %reg1026 = SUBREG_TO_REG 0, %reg1027, 4

The problem here is that SUBREG_TO_REG is there to assert that an implicit zext
occurs. It doesn't insert a zext instruction. If we allow the EXTRACT_SUBREG
here, it will give us the value after the <sext>, not the original value of
%reg1024 before <sext>.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105741 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-09 19:00:55 +00:00
autoconf Fix a spello affecting platforms where the configure check fails. 2010-06-01 16:22:27 +00:00
bindings add attributes and module level asm to the ocaml bindings, 2010-04-10 17:52:58 +00:00
cmake Tell Valgrind when we modify already-executed machine code so it knows 2010-03-15 04:57:55 +00:00
docs Teach tablegen to support 'defm' inside multiclasses. 2010-06-05 02:11:52 +00:00
examples Remove the -enable-sjlj-eh option, which doesn't do anything. 2010-05-02 15:36:26 +00:00
include Revert 105540, 105542, 105544, 105546, and 105548 to unbreak bootstrapping. 2010-06-09 18:59:43 +00:00
lib It's an error to translate this: 2010-06-09 19:00:55 +00:00
projects Testing subversion commit access 2010-02-23 15:11:17 +00:00
runtime Delete a blank line. 2010-04-16 13:32:55 +00:00
test Workaround SCEV non-determinism on this test, for now, to get buildbots back to 2010-06-09 17:54:40 +00:00
tools Change another reference to the "indirect callgraph node" to 2010-06-09 17:39:05 +00:00
unittests ADT: Add DAGDeltaAlgorithm, which is a DAG minimization algorithm built on top of the standard 'delta debugging' algorithm. 2010-06-08 16:21:22 +00:00
utils Further refine types for operations which take scalars. 2010-06-09 18:02:26 +00:00
website
build-for-llvm-top.sh Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
CMakeLists.txt CMake: Add options for using static runtime on MSVC++ build. 2010-03-18 13:52:05 +00:00
configure Fix a spello affecting platforms where the configure check fails. 2010-06-01 16:22:27 +00:00
CREDITS.TXT Adding the MicroBlaze backend. 2010-02-23 19:15:24 +00:00
LICENSE.TXT 2010 is upon us. 2010-01-09 18:40:31 +00:00
llvm.spec.in
Makefile Update for CIndex rename. 2010-04-30 23:36:47 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in Delete unused variables (that weren't even getting expanded). 2010-06-01 17:26:14 +00:00
Makefile.rules Makefiles: Teach LLVM's recursive makefile descent to update objdir Makefiles if 2010-06-08 20:10:13 +00:00
ModuleInfo.txt Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
README.txt Give packagers some advice about how to build LLVM so it's useful to 2010-02-26 00:54:42 +00:00

README.txt 

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

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