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LLVM backend for 6502
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fe02c69f84
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Duncan Sands fe02c69f84 Simplify (X<<1)-X into X. According to my auto-simplier this is the most common missed 
simplification in fully optimized code.  It occurs sporadically in the testsuite, and
many times in 403.gcc: the final bitcode has 131 fewer subtractions after this change.
The reason that the multiplies are not eliminated is the same reason that instcombine
did not catch this: they are used by other instructions (instcombine catches this with
a more general transform which in general is only profitable if the operands have only
one use).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123754 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-18 09:24:58 +00:00
autoconf autoconf: Add --disable-embed-stdcxx to suppress linking libstdc++.a into llvm.dll with --enable-shared on Cygming. 2010-12-29 03:59:14 +00:00
bindings Fix OCaml bindings crash, PR8847. 2010-12-23 15:49:26 +00:00
cmake Add some platform checks. Also fix a typo on a Makefile. 2011-01-17 16:35:14 +00:00
docs finish a sentence. 2011-01-18 06:12:10 +00:00
examples Do not re-test for the existence of pthread.h. 2010-12-23 21:27:22 +00:00
include There is no point in verifying an analysis that is never updated. 2011-01-18 05:44:04 +00:00
lib Simplify (X<<1)-X into X. According to my auto-simplier this is the most common missed 2011-01-18 09:24:58 +00:00
projects Regen configure 2010-12-12 21:42:01 +00:00
runtime Rename 'libprofile/exported_symbols.lst' to 'libprofile/libprofile.exports'. 2010-09-03 15:42:45 +00:00
test Simplify (X<<1)-X into X. According to my auto-simplier this is the most common missed 2011-01-18 09:24:58 +00:00
tools Add some platform checks. Also fix a typo on a Makefile. 2011-01-17 16:35:14 +00:00
unittests Unittests/Support/Path: Tweak test. 2011-01-15 18:52:49 +00:00
utils Formatting tweak. 2011-01-18 01:59:30 +00:00
website
.gitignore Cleanup and document .gitignore. 2010-12-17 17:22:50 +00:00
build-for-llvm-top.sh
CMakeLists.txt Suppress warning "switch statement contains 'default' but no 'case' labels" on MSVC. 2011-01-17 02:07:17 +00:00
configure autoconf: Add --disable-embed-stdcxx to suppress linking libstdc++.a into llvm.dll with --enable-shared on Cygming. 2010-12-29 03:59:14 +00:00
CREDITS.TXT Another git svn dcommit test. This time let's hope it doesn't kill my repo. 2010-12-10 14:45:10 +00:00
LICENSE.TXT
llvm.spec.in
Makefile Merge System into Support. 2010-11-29 18:16:10 +00:00
Makefile.common
Makefile.config.in autoconf: Add --disable-embed-stdcxx to suppress linking libstdc++.a into llvm.dll with --enable-shared on Cygming. 2010-12-29 03:59:14 +00:00
Makefile.rules build: Shared libraries shouldn't used RPATH on Darwin, only main executables 2010-12-08 02:29:26 +00:00
ModuleInfo.txt Remove trailing space. This is just an excuse to poke the 2010-10-05 20:32:15 +00:00
README.txt Undoing test commit blank space. 2010-09-29 17:39:29 +00:00

README.txt 

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