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LLVM backend for 6502
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96908b17ae
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Chris Lattner 96908b17ae generalize the previous check to handle -1 on either side of the 
select, inserting a not to compensate.  Add a missing isZero check
that I lost somehow.

This improves codegen of:

void *func(long count) {
      return new int[count];
}

from:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	testq	%rdx, %rdx              ## encoding: [0x48,0x85,0xd2]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL
                                        ## encoding: [0xeb,A]

to:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	cmpq	$1, %rdx                ## encoding: [0x48,0x83,0xfa,0x01]
	sbbq	%rdi, %rdi              ## encoding: [0x48,0x19,0xff]
	notq	%rdi                    ## encoding: [0x48,0xf7,0xd7]
	orq	%rax, %rdi              ## encoding: [0x48,0x09,0xc7]
	jmp	__Znam                  ## TAILCALL
                                        ## encoding: [0xeb,A]



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120932 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-05 02:00:51 +00:00
autoconf Apparently OS X 10.4 doesn't have __crashreporter_info__. 2010-12-03 07:45:22 +00:00
bindings
cmake Disable C++ exception handling on MSVC. 2010-12-04 14:30:22 +00:00
docs Add naming rules to the coding standards. 2010-12-02 05:10:07 +00:00
examples Fix missing includes of "llvm/Analysis/Passes.h" in the tutorials. Thanks 2010-11-16 17:28:22 +00:00
include Remember the contents of leb and dwarfline fragments when relaxing. This avoids 2010-12-04 21:58:52 +00:00
lib generalize the previous check to handle -1 on either side of the 2010-12-05 02:00:51 +00:00
projects I swear I did a make clean and make before committing all this... 2010-11-29 18:47:54 +00:00
runtime
test generalize the previous check to handle -1 on either side of the 2010-12-05 02:00:51 +00:00
tools Do not try luck by using given name to create temporary file. In parallel builds it may not work. 2010-12-03 23:58:31 +00:00
unittests Unittests/Support/PathV2: Add FileSystem tests. 2010-12-04 03:18:42 +00:00
utils Remove trailing whitespace. 2010-12-04 04:40:15 +00:00
website
build-for-llvm-top.sh
CMakeLists.txt Disable C++ exception handling on MSVC. 2010-12-04 14:30:22 +00:00
configure Apparently OS X 10.4 doesn't have __crashreporter_info__. 2010-12-03 07:45:22 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
Makefile Merge System into Support. 2010-11-29 18:16:10 +00:00
Makefile.common
Makefile.config.in It seems inconsistent to have LLVMCC_EMITIR_FLAG and 2010-11-25 17:57:43 +00:00
Makefile.rules Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
ModuleInfo.txt
README.txt

README.txt 

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

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