llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-20 10:30:03 +00:00

LLVM backend for 6502

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Chris Lattner 5d5261c819 Teach basicaa that x\|c == x+c when the c bits of x are clear. This allows us to compile the example in readme.txt into: LBB1_1: ## %bb movl 4(%rdx,%rax), %ecx movl %ecx, %esi imull (%rdx,%rax), %esi imull %esi, %ecx movl %esi, 8(%rdx,%rax) imull %ecx, %esi movl %ecx, 12(%rdx,%rax) movl %esi, 16(%rdx,%rax) imull %ecx, %esi movl %esi, 20(%rdx,%rax) addq $16, %rax cmpq $4000, %rax jne LBB1_1 instead of: LBB1_1: movl (%rdx,%rax), %ecx imull 4(%rdx,%rax), %ecx movl %ecx, 8(%rdx,%rax) imull 4(%rdx,%rax), %ecx movl %ecx, 12(%rdx,%rax) imull 8(%rdx,%rax), %ecx movl %ecx, 16(%rdx,%rax) imull 12(%rdx,%rax), %ecx movl %ecx, 20(%rdx,%rax) addq $16, %rax cmpq $4000, %rax jne LBB1_1 GCC (4.2) doesn't seem to be able to eliminate the loads in this testcase either, it generates: L2: movl (%rdx), %eax imull 4(%rdx), %eax movl %eax, 8(%rdx) imull 4(%rdx), %eax movl %eax, 12(%rdx) imull 8(%rdx), %eax movl %eax, 16(%rdx) imull 12(%rdx), %eax movl %eax, 20(%rdx) addl $4, %ecx addq $16, %rdx cmpl $1002, %ecx jne L2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89952 91177308-0d34-0410-b5e6-96231b3b80d8		2009-11-26 16:26:43 +00:00
autoconf	Add CMake and configure logic to create llvm/Config/Disassemblers.defs.	2009-11-25 04:30:13 +00:00
bindings	Expose the rest of the attribute settings.	2009-09-28 04:42:47 +00:00
cmake	Add the rest of the build system logic for optional target disassemblers	2009-11-25 04:46:58 +00:00
docs	Update to reflect recent debugging information encoding changes.	2009-11-25 23:28:01 +00:00
examples	Re-commit r86077 now that r86290 fixes the 179.art and 175.vpr ARM regressions.	2009-11-07 00:16:28 +00:00
include	Split tail duplication into a separate pass. This is needed to avoid	2009-11-26 00:32:21 +00:00
lib	Teach basicaa that x\|c == x+c when the c bits of x are clear. This	2009-11-26 16:26:43 +00:00
projects	Move DataTypes.h to include/llvm/System, update all users. This breaks the last	2009-10-26 01:35:46 +00:00
runtime	OptimalEdgeProfiling: Creation of profiles.	2009-09-01 19:03:44 +00:00
test	Teach basicaa that x\|c == x+c when the c bits of x are clear. This	2009-11-26 16:26:43 +00:00
tools	Rollback changes r89516: Added two SubtargetFeatures::AddFeatures methods, which accept a comma-separated string or already parsed command line parameters as input, and some code re-factoring to use these new methods.	2009-11-25 22:44:18 +00:00
unittests	Oops. Re-disable JITTest.NoStubs on ARM and PPC since they still use stubs to	2009-11-24 02:11:14 +00:00
utils	Sketch TableGen disassembler emitter, based on patch by Sean Callanan.	2009-11-25 02:13:23 +00:00
website	Prepare for "core" website.	2007-08-03 05:43:35 +00:00
Xcode	Remove the IA-64 backend.	2009-07-24 00:30:09 +00:00
build-for-llvm-top.sh	Patch to build llvm with srcdir != objdir from	2009-01-23 08:42:38 +00:00
CMakeLists.txt	Add CMake and configure logic to create llvm/Config/Disassemblers.defs.	2009-11-25 04:30:13 +00:00
configure	Regenerate configure	2009-11-25 04:37:28 +00:00
CREDITS.TXT	Add myself to the blame list.	2009-08-20 15:20:15 +00:00
LICENSE.TXT	Add regular expression matching support, based on OpenBSD regexec()/regcomp()	2009-08-30 08:24:09 +00:00
llvm.spec.in	* llvm.spec.in: update blurb	2007-07-13 09:48:29 +00:00
Makefile	Add the rest of the build system logic for optional target disassemblers	2009-11-25 04:46:58 +00:00
Makefile.common	Removed trailing whitespace from Makefiles.	2009-01-09 16:44:42 +00:00
Makefile.config.in	Add configure options for specifying where to look for libstdc++.	2009-11-16 19:46:55 +00:00
Makefile.rules	Add the rest of the build system logic for optional target disassemblers	2009-11-25 04:46:58 +00:00
ModuleInfo.txt	Patch to build llvm with srcdir != objdir from	2009-01-23 08:42:38 +00:00
README.txt	First test commit	2009-10-05 22:29:11 +00:00

README.txt

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

This directory and its subdirectories contain source code for the Low Level
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the HTML documentation provided in docs/index.html for further
assistance with LLVM.