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LLVM backend for 6502
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Chandler Carruth 115fd30b24 [LPM] Apply a really big hammer to fix PR18688 by recursively reforming 
LCSSA when we promote to SSA registers inside of LICM.

Currently, this is actually necessary. The promotion logic in LICM uses
SSAUpdater which doesn't understand how to place LCSSA PHI nodes.
Teaching it to do so would be a very significant undertaking. It may be
worthwhile and I've left a FIXME about this in the code as well as
starting a thread on llvmdev to try to figure out the right long-term
solution.

For now, the PR needs to be fixed. Short of using the promition
SSAUpdater to place both the LCSSA PHI nodes and the promoted PHI nodes,
I don't see a cleaner or cheaper way of achieving this. Fortunately,
LCSSA is relatively lazy and sparse -- it should only update
instructions which need it. We can also skip the recursive variant when
we don't promote to SSA values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200612 91177308-0d34-0410-b5e6-96231b3b80d8
2014-02-01 13:35:14 +00:00
autoconf Introduce line editor library. 2014-01-31 23:46:14 +00:00
bindings Makefile.ocaml: Tweak to use --system-libs. 2013-12-20 00:36:59 +00:00
cmake Introduce line editor library. 2014-01-31 23:46:14 +00:00
docs [stackprotector] Implement the sspstrong rules for stack layout. 2014-02-01 01:36:16 +00:00
examples [cleanup] Re-sort the examples #include lines with my sort_includes 2014-01-13 09:58:03 +00:00
include Implement inalloca codegen for x86 with the new inalloca design 2014-01-31 23:50:57 +00:00
lib [LPM] Apply a really big hammer to fix PR18688 by recursively reforming 2014-02-01 13:35:14 +00:00
projects llvm/projects/CMakeLists.txt: Add dragonegg. 2014-01-24 12:53:08 +00:00
test [LPM] Apply a really big hammer to fix PR18688 by recursively reforming 2014-02-01 13:35:14 +00:00
tools Simplify getSymbolFlags. 2014-01-31 20:57:12 +00:00
unittests Introduce line editor library. 2014-01-31 23:46:14 +00:00
utils Separate x86 opcode maps and 0x66/0xf2/0xf3 prefixes from each other in the TSFlags. This greatly simplifies the switch statements in the disassembler tables and the code emitters. 2014-01-31 08:47:06 +00:00
.arcconfig
.clang-format
.gitignore Added .DS_Store entry in .gitignore for ignoring .DS_Store files in the source 2014-01-25 15:15:16 +00:00
CMakeLists.txt [CMake] Move libgtest for external projects. 2014-01-31 17:32:46 +00:00
CODE_OWNERS.TXT Update email address. 2013-12-04 09:42:49 +00:00
configure Introduce line editor library. 2014-01-31 23:46:14 +00:00
CREDITS.TXT Fix documentation typos 2013-12-20 00:33:39 +00:00
LICENSE.TXT Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile Fix bad variable syntax in r199413 2014-01-17 00:40:39 +00:00
Makefile.common
Makefile.config.in
Makefile.rules [Mips]Work around MIPS linker issues exposed by commit r198087 until bug 18360 is resolved 2014-01-03 22:18:43 +00:00
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