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LLVM backend for 6502
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fa487e83a8
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Richard Sandiford fa487e83a8 [SystemZ] Fold more spills 
Add a mapping from register-based <INSN>R instructions to the corresponding
memory-based <INSN>.  Use it to cut down on the number of spill loads.

Some instructions extend their operands from smaller fields, so this
required a new TSFlags field to say how big the unextended operand is.

This optimisation doesn't trigger for C(G)R and CL(G)R because in practice
we always combine those instructions with a branch.  Adding a test for every
other case probably seems excessive, but it did catch a missed optimisation
for DSGF (fixed in r185435).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185529 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-03 10:10:02 +00:00
autoconf The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
bindings
cmake Support using "host" as a target in LLVM_TARGETS_TO_BUILD when using cmake. 2013-06-26 07:57:53 +00:00
docs Fixed typo in LangRef where we were using _'' to quote instead of the correct _. 2013-07-02 21:32:56 +00:00
examples
include Use SmallVectorImpl instead of SmallVector for iterators and references to avoid specifying the vector size unnecessarily. 2013-07-03 05:11:49 +00:00
lib [SystemZ] Fold more spills 2013-07-03 10:10:02 +00:00
projects The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
runtime
test [SystemZ] Fold more spills 2013-07-03 10:10:02 +00:00
tools Remove address spaces from MC. 2013-07-02 15:49:13 +00:00
unittests Fix -Wsign-compare warning and remove windows-style line endings introduced by r185421 2013-07-02 16:48:10 +00:00
utils Improve the compression of the tablegen DiffLists by introducing a new sort 2013-06-27 19:38:13 +00:00
.arcconfig
.gitignore
CMakeLists.txt Support using "host" as a target in LLVM_TARGETS_TO_BUILD when using cmake. 2013-06-26 07:57:53 +00:00
CODE_OWNERS.TXT Add more owners to CODE_OWNERS.TXT (Kostya Serebryany: AddressSanitizer and ThreadSanitizer; Evgeniy Stepanov: MemorySanitizer) 2013-06-27 08:47:12 +00:00
configure The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Add an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
README.txt

README.txt 

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

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