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Manman Ren 78cf02a07b Register Allocator: check other options before using a CSR for the first time. 
When register allocator's stage is RS_Spill, we choose spill over using the CSR
for the first time, if the spill cost is lower than CSRCost. 
When register allocator's stage is < RS_Split, we choose pre-splitting over
using the CSR for the first time, if the cost of splitting is lower than
CSRCost.

CSRCost is set with command-line option "regalloc-csr-first-time-cost". The
default value is 0 to generate the same codes as before this commit.

With a value of 15 (1 << 14 is the entry frequency), I measured performance
gain of 3% on 253.perlbmk and 1.7% on 197.parser, with instrumented PGO,
on an arm device.

rdar://16162005

llvm-svn: 204690
 		2014-03-25 00:16:25 +00:00
..
Analysis Reject alias to undefined symbols in the verifier. 2014-03-12 20:15:49 +00:00
Assembler Reject alias to undefined symbols in the verifier. 2014-03-12 20:15:49 +00:00
Bindings Fix the ocaml test to not create a alias to a declaration. 2014-03-12 21:20:42 +00:00
Bitcode Remove the linker_private and linker_private_weak linkages. 2014-03-13 23:18:37 +00:00
BugPoint llvm/test/BugPoint/compile-custom.ll.py: Make it py3-compatible. [PR19112] 2014-03-13 00:10:37 +00:00
CodeGen Register Allocator: check other options before using a CSR for the first time. 2014-03-25 00:16:25 +00:00
DebugInfo DebugInfo: Add DW_AT_GNU_ranges_base to skeleton CUs 2014-03-24 21:31:35 +00:00
ExecutionEngine Ignore old JIT tests in AARch64 - CMake style 2014-02-25 09:31:00 +00:00
Feature Expose "noduplicate" attribute as a property for intrinsics. 2014-03-18 23:51:07 +00:00
FileCheck FileCheck: fix a bug with multiple --check-prefix options. Similar to r194565 2013-11-20 13:25:05 +00:00
Instrumentation [ASan] Add -asan-module to the ASan .ll tests. 2014-03-20 11:16:34 +00:00
Integer
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JitListener Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
LTO Module: Don't rename in getOrInsertFunction() 2014-03-10 23:42:28 +00:00
Linker Switch the type field in DIVariable and DIGlobalVariable over to DITypeRefs. 2014-03-18 02:34:58 +00:00
MC Fix crashes when assembler directives are used that are not 2014-03-25 00:05:50 +00:00
Object Teach llvm-readobj to print human friendly description of reserved sections. 2014-03-24 05:00:34 +00:00
Other [PM] Wire up the Verifier for the new pass manager and connect it to the 2014-01-20 11:34:08 +00:00
TableGen [TableGen] Correctly generate implicit anonymous prototype defs in multiclasses 2014-01-02 20:47:09 +00:00
Transforms Allow constant folding of ceil function whenever feasible 2014-03-24 04:36:06 +00:00
Unit With rpaths being set correctly, SHLIBPATH_VAR is not needed anymore. 2014-02-28 16:16:51 +00:00
Verifier Reject alias to undefined symbols in the verifier. 2014-03-12 20:15:49 +00:00
YAMLParser [Support][YAML] Add support for accessing tags and tag handle substitution. 2013-10-18 22:38:04 +00:00
tools Teach llvm-readobj to print human friendly description of reserved sections. 2014-03-24 05:00:34 +00:00
.clang-format Add .clang-format without column limit to subdirectory tests/. 2013-11-19 04:26:05 +00:00
CMakeLists.txt [CMake] check-llvm: Include "bugpoint" in dependent list. 2014-03-04 16:13:30 +00:00
Makefile With rpaths being set correctly, SHLIBPATH_VAR is not needed anymore. 2014-02-28 16:16:51 +00:00
Makefile.tests
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TestRunner.sh
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lit.cfg Refactor llvm/test/lit.cfg to use lit.util.which. 2014-03-21 17:31:35 +00:00
lit.site.cfg.in Eliminate inappropriate use of FindProgramByName() from lli 2014-01-22 21:52:35 +00:00