LLVM backend for 6502
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Jakob Stoklund Olesen 31867660cb Add a CoveredBySubRegs property to Register descriptions.
When set, this bit indicates that a register is completely defined by
the value of its sub-registers.

Use the CoveredBySubRegs property to infer which super-registers are
call-preserved given a list of callee-saved registers.  For example, the
ARM registers D8-D15 are callee-saved.  This now automatically implies
that Q4-Q7 are call-preserved.

Conversely, Win64 callees save XMM6-XMM15, but the corresponding
YMM6-YMM15 registers are not call-preserved because they are not fully
defined by their sub-registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148363 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-18 00:16:39 +00:00
autoconf Makefile: add missing files to FilesToConfig 2012-01-17 02:56:49 +00:00
bindings
cmake revert r147542 after comments from Joerg Sonnenberger 2012-01-05 18:28:46 +00:00
docs Add a new kind of MachineOperand: MO_RegisterMask. 2012-01-16 19:22:00 +00:00
examples
include Add a CoveredBySubRegs property to Register descriptions. 2012-01-18 00:16:39 +00:00
lib Add a CoveredBySubRegs property to Register descriptions. 2012-01-18 00:16:39 +00:00
projects revert r147542 after comments from Joerg Sonnenberger 2012-01-05 18:28:46 +00:00
runtime
test Test case rename 2012-01-17 22:27:45 +00:00
tools Remove unreachable code. (replace with llvm_unreachable to help GCC where necessary) 2012-01-17 04:43:56 +00:00
unittests Add portable bit mask operations to BitVector. 2012-01-17 01:24:32 +00:00
utils Add a CoveredBySubRegs property to Register descriptions. 2012-01-18 00:16:39 +00:00
.gitignore
CMakeLists.txt
configure revert r147542 after comments from Joerg Sonnenberger 2012-01-05 18:28:46 +00:00
CREDITS.TXT
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Makefile Makefile: add missing files to FilesToConfig 2012-01-17 02:56:49 +00:00
Makefile.common
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