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Ulrich Weigand be928cc276 [PowerPC] ELFv2 explicit CFI for CR fields 
This is a minor improvement in the ELFv2 ABI.   In ELFv1, DWARF CFI
would represent a saved CR word (holding CR fields CR2, CR3, and CR4)
using just a single CFI record refering to CR2.   In ELFv2 instead,
each of the CR fields is represented by its own CFI record.  The
advantage is that the compiler can now chose to save just a single
(or two) CR fields instead of all of them, if those are the only ones
that actually need saving.  That can lead to more efficient code using
mf(o)crf instead of the (slow) mfcr instruction.

Note that this patch does not (yet) implement this more efficient
code generation, but it does implement the part that is required to
be ABI compliant: creating multiple CFI records if multiple CR fields
are saved.

Reviewed by Hal Finkel.

llvm-svn: 213492
 		2014-07-21 00:03:18 +00:00
..
Analysis Improve BasicAA CS-CS queries (redux) 2014-07-17 01:28:25 +00:00
Assembler IR: Add COMDATs to the IR 2014-06-27 18:19:56 +00:00
Bindings Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
Bitcode Add a dereferenceable attribute 2014-07-18 15:51:28 +00:00
BugPoint llvm/test/BugPoint/compile-custom.ll: Use explicit %python to invoke a test script, compile-custom.ll.py, for shebang-incapable hosts. 2014-07-11 14:44:10 +00:00
CodeGen [PowerPC] ELFv2 explicit CFI for CR fields 2014-07-21 00:03:18 +00:00
DebugInfo MC: correct DWARF header for PE/COFF assembly input 2014-07-17 16:27:44 +00:00
ExecutionEngine [RuntimeDyld] Replace a crufty old ARM RuntimeDyld test with a new one that uses 2014-07-10 23:29:11 +00:00
Feature IR: Allow comdats to be applied to globals with internal linkage 2014-07-13 04:56:11 +00:00
FileCheck Add FileCheck -implicit-check-not option to allow stricter tests without adding too many CHECK-NOTs manually. 2014-07-11 12:39:32 +00:00
Instrumentation [ASan] Don't instrument load/stores with !nosanitize metadata. 2014-07-17 18:48:12 +00:00
Integer
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JitListener
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LTO Change the default input for llvm-nm to be a.out instead of standard input 2014-06-23 20:27:53 +00:00
Linker IR: Add COMDATs to the IR 2014-06-27 18:19:56 +00:00
MC [MC] Pass MCSymbolData to needsRelocateWithSymbol 2014-07-20 23:15:06 +00:00
Object Add printing of Mach-O stabs in llvm-nm. 2014-07-17 22:47:16 +00:00
Other IR: Fold away compares between GV GEPs and GVs 2014-07-04 22:05:26 +00:00
TableGen [TableGen] Allow shift operators to take bits<n> 2014-07-17 17:04:27 +00:00
Transforms [LoopVectorize] Use AA to partition potential dependency checks 2014-07-20 23:07:52 +00:00
Unit Let test/Unit/lit.cfg add config.shlibdir to $PATH on DLL platforms like cygming. 2014-07-04 05:11:55 +00:00
Verifier IR: Allow comdats to be applied to globals with internal linkage 2014-07-13 04:56:11 +00:00
YAMLParser
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tools llvm-objdump: Handle BSS sections larger than the object file 2014-07-14 16:20:14 +00:00
.clang-format
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CMakeLists.txt OK, NAKAMURA Takumi beat me to this change. So backing out my addition of 2014-05-19 23:26:51 +00:00
Makefile lld test for configure & make 2014-06-06 09:06:25 +00:00
Makefile.tests
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TestRunner.sh
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lit.cfg llvm/test/lit.cfg: Let %python available. 2014-07-11 14:36:39 +00:00
lit.site.cfg.in
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