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LLVM backend for 6502
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d462ba8539
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Duncan Sands d462ba8539 Teach LegalizeTypes how to expand and promote CTLZ, 
CTTZ and CTPOP.  The expansion code differs from
that in LegalizeDAG in that it chooses to take the
CTLZ/CTTZ count from the Hi/Lo part depending on
whether the Hi/Lo value is zero, not on whether
CTLZ/CTTZ of Hi/Lo returned 32 (or whatever the
width of the type is) for it.  I made this change
because the optimizers may well know that Hi/Lo
is zero and exploit it.  The promotion code for
CTTZ also differs from that in LegalizeDAG: it
uses an "or" to get the right result when the
original value is zero, rather than using a compare
and select.  This also means the value doesn't
need to be zero extended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47075 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 18:01:53 +00:00
autoconf Remove use of ltdl 2008-02-13 17:11:39 +00:00
bindings Modify Makefile.rules to allow makefiles to prepend to C.Flags and 2008-01-06 21:54:35 +00:00
docs gcc 3.2.3 is also bad. 2008-02-13 17:50:24 +00:00
examples remove attributions from examples. 2007-12-29 20:37:57 +00:00
include Remove use of ltdl 2008-02-13 17:11:39 +00:00
lib Teach LegalizeTypes how to expand and promote CTLZ, 2008-02-13 18:01:53 +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 Teach LegalizeTypes how to expand and promote CTLZ, 2008-02-13 18:01:53 +00:00
tools Begin setting features for target based on target triple string. 2008-02-07 22:32:50 +00:00
utils Remove dead code. 2008-02-12 18:20:50 +00:00
website Prepare for "core" website. 2007-08-03 05:43:35 +00:00
win32 Rename MRegisterInfo to TargetRegisterInfo. 2008-02-10 18:45:23 +00:00
Xcode Rename MRegisterInfo to TargetRegisterInfo. 2008-02-10 18:45:23 +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 Remove use of ltdl 2008-02-13 17:11:39 +00:00
CREDITS.TXT Update credits. 2007-12-11 09:32:07 +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 remove attributions from the rest of the llvm makefiles. 2007-12-29 20:11:13 +00:00
Makefile.common remove attributions from the rest of the llvm makefiles. 2007-12-29 20:11:13 +00:00
Makefile.config.in improve compatibility with mingw, patch by Alain Frisch 2008-01-15 22:50:50 +00:00
Makefile.rules Make the check for GCC version more robust, fix shared library 2008-02-05 19:43:40 +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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