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LLVM backend for 6502
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Quentin Colombet 5b00f4edcb Modify how the formulae are rated in Loop Strength Reduce. 
Namely, check if the target allows to fold more that one register in the
addressing mode and if yes, adjust the cost accordingly.

Prior to this commit, reg1 + scale * reg2 accesses were artificially preferred
to reg1 + reg2 accesses. Indeed, the cost model wrongly assumed that reg1 + reg2
needs a temporary register for the computation, whereas it was correctly
estimated for reg1 + scale * reg2.

<rdar://problem/13973908>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183021 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-31 17:20:29 +00:00
autoconf Make R600 non-experimental. 2013-05-22 00:35:47 +00:00
bindings
cmake Add colored diagnostics when building LLVM with cmake + ninja + clang 2013-05-29 20:41:35 +00:00
docs Add links to the System z architecture manual and ABI 2013-05-31 09:14:54 +00:00
examples ExceptionDemo: Corresponding to r181820, SectionMemoryManager should belong to RTDyldMemoryManager. 2013-05-14 23:05:00 +00:00
include Add a way to define the bit range covered by a SubRegIndex. 2013-05-31 17:08:36 +00:00
lib Modify how the formulae are rated in Loop Strength Reduce. 2013-05-31 17:20:29 +00:00
projects sync projects/sample's autohell. 2013-05-22 12:37:27 +00:00
runtime
test Modify how the formulae are rated in Loop Strength Reduce. 2013-05-31 17:20:29 +00:00
tools Don't reach into the middle of TargetMachine and cache one of its ivars. 2013-05-29 20:37:19 +00:00
unittests Remove unused member. 2013-05-30 20:19:35 +00:00
utils Add a way to define the bit range covered by a SubRegIndex. 2013-05-31 17:08:36 +00:00
.arcconfig
.gitignore
CMakeLists.txt Allow duplicates in LLVM_TARGETS_TO_BUILD and LLVM_EXPERIMENTAL_TARGETS_TO_BUILD. 2013-05-22 02:45:28 +00:00
CODE_OWNERS.TXT Add myself as SystemZ code owner 2013-05-08 14:41:29 +00:00
configure Make R600 non-experimental. 2013-05-22 00:35:47 +00:00
CREDITS.TXT Test commit. 2013-05-09 12:32:36 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules Remove redundant rpath. 2013-05-23 02:53:22 +00:00
README.txt

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