Jim Grosbach 6ccfc507dc Many Thumb2 instructions can reference the full ARM register set (i.e., ... have 4 bits per register in the operand encoding), but have undefined behavior when the operand value is 13 or 15 (SP and PC, respectively). The trivial coalescer in linear scan sometimes will merge a copy from SP into a subsequent instruction which uses the copy, and if that instruction cannot legally reference SP, we get bad code such as: mls r0,r9,r0,sp instead of: mov r2, sp mls r0, r9, r0, r2 This patch adds a new register class for use by Thumb2 that excludes the problematic registers (SP and PC) and is used instead of GPR for those operands which cannot legally reference PC or SP. The trivial coalescer explicitly requires that the register class of the destination for the COPY instruction contain the source register for the COPY to be considered for coalescing. This prevents errant instructions like that above. PR7499 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109842 91177308-0d34-0410-b5e6-96231b3b80d8		2010-07-30 02:41:01 +00:00
..
bugpoint
buildit	Add an explicit -sdk option to xcrun command.	2010-07-22 23:33:00 +00:00
count	Fix extra fread after EOF, non-wires-crossed version.	2010-06-01 14:09:29 +00:00
crosstool
emacs
FileCheck	stringref-ize the MemoryBuffer::get apis. This requires	2010-04-05 22:42:30 +00:00
FileUpdate	When handling raw_ostream errors manually, use clear_error() so that	2010-05-27 20:17:28 +00:00
fpcmp	Remove unnecessary uses of <iostream>.	2010-04-15 03:47:24 +00:00
git
jedit
lint
lit	lit: Add some example tests for previous commit.	2010-07-22 00:40:19 +00:00
Misc
not
PerfectShuffle
TableGen	Many Thumb2 instructions can reference the full ARM register set (i.e.,	2010-07-30 02:41:01 +00:00
unittest	Silence a warning.	2010-07-12 18:17:47 +00:00
valgrind	Supress valgrind errors from python.	2010-07-29 23:15:04 +00:00
vim	Make un-named values legible in certain vim configurations.	2010-07-29 17:57:57 +00:00
cgiplotNLT.pl
check-each-file
codegen-diff
countloc.sh
DSAclean.py
DSAextract.py
findmisopt
findoptdiff
findsym.pl
GenLibDeps.pl
GetSourceVersion
getsrcs.sh
importNLT.pl
llvm-native-gcc
llvm-native-gxx
llvm.grm	Add a polygen rule that reflects the fact that nsw and nuw can be	2010-05-04 00:13:24 +00:00
llvmdo
llvmgrep
Makefile
makellvm
mkpatch
NewNightlyTest.pl	Rename "Release" builds as "Release+Asserts"; rename "Release-Asserts"	2010-07-07 07:48:00 +00:00
NightlyTest.gnuplot
NightlyTestTemplate.html
NLT.schema
OldenDataRecover.pl
parseNLT.pl
plotNLT.pl
profile.pl
RegressionFinder.pl
UpdateCMakeLists.pl
userloc.pl
webNLT.pl