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LLVM backend for 6502
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Benjamin Kramer 0baa94a13b InstCombine: Turn icmp + sext into bitwise/integer ops when the input has only one unknown bit. 
int test1(unsigned x) { return (x&8) ? 0 : -1; }
int test3(unsigned x) { return (x&8) ? -1 : 0; }

before (x86_64):
_test1:
	andl	$8, %edi
	cmpl	$1, %edi
	sbbl	%eax, %eax
	ret
_test3:
	andl	$8, %edi
	cmpl	$1, %edi
	sbbl	%eax, %eax
	notl	%eax
	ret

after:
_test1:
	shrl	$3, %edi
	andl	$1, %edi
	leal	-1(%rdi), %eax
	ret
_test3:
	shll	$28, %edi
	movl	%edi, %eax
	sarl	$31, %eax
	ret

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128732 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-01 20:09:10 +00:00
autoconf Check that the AsmParser exists for the native target to enable initialization 2011-03-14 22:12:35 +00:00
bindings
cmake Fix assignment of -fPIC to CMAKE_C_FLAGS. Configure llvm-config.in.in 2011-04-01 19:36:06 +00:00
docs Pick better examples. "fpext float 3.1415 to double" won't parse because 3.1415 2011-03-31 18:20:19 +00:00
examples Remove PHINode::reserveOperandSpace(). Instead, add a parameter to 2011-03-30 11:28:46 +00:00
include Various Instructions' resizeOperands() methods are only used to grow the 2011-04-01 08:00:58 +00:00
lib InstCombine: Turn icmp + sext into bitwise/integer ops when the input has only one unknown bit. 2011-04-01 20:09:10 +00:00
projects
runtime
test InstCombine: Turn icmp + sext into bitwise/integer ops when the input has only one unknown bit. 2011-04-01 20:09:10 +00:00
tools Fix assignment of -fPIC to CMAKE_C_FLAGS. Configure llvm-config.in.in 2011-04-01 19:36:06 +00:00
unittests While testing dragonegg I noticed that isCastable and getCastOpcode 2011-04-01 03:34:54 +00:00
utils Add annotations to tablegen-generated processor itineraries, or replace them with something meaningful. I want to be able to read and debug the generated tables. 2011-04-01 02:22:47 +00:00
website
.gitignore
build-for-llvm-top.sh
CMakeLists.txt Supports building with a list of targets that does not contain 2011-03-23 17:42:13 +00:00
configure Check that the AsmParser exists for the native target to enable initialization 2011-03-14 22:12:35 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
Makefile
Makefile.common
Makefile.config.in
Makefile.rules Makefile.rules: [PR2928] "make install" may install include files along explicit pattern, not to install CMake's building stuff. 2011-03-09 09:11:27 +00:00
ModuleInfo.txt
README.txt

README.txt 

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