Benjamin Kramer b6fdd022b7 PR13095: Give an inline cost bonus to functions using byval arguments. ... We give a bonus for every argument because the argument setup is not needed anymore when the function is inlined. With this patch we interpret byval arguments as a compact representation of many arguments. The byval argument setup is implemented in the backend as an inline memcpy, so to model the cost as accurately as possible we take the number of pointer-sized elements in the byval argument and give a bonus of 2 instructions for every one of those. The bonus is capped at 8 elements, which is the number of stores at which the x86 backend switches from an expanded inline memcpy to a real memcpy. It would be better to use the real memcpy threshold from the backend, but it's not available via TargetData. This change brings the performance of c-ray in line with gcc 4.7. The included test case tries to reproduce the c-ray problem to catch regressions for this benchmark early, its performance is dominated by the inline decision of a specific call. This only has a small impact on most code, more on x86 and arm than on x86_64 due to the way the ABI works. When building LLVM for x86 it gives a small inline cost boost to virtually any function using StringRef or STL allocators, but only a 0.01% increase in overall binary size. The size of gcc compiled by clang actually shrunk by a couple bytes with this patch applied, but not significantly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161413 91177308-0d34-0410-b5e6-96231b3b80d8		2012-08-07 11:13:19 +00:00
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Analysis	Stay rational; don't assert trying to take the square root of a negative value.	2012-08-01 09:14:36 +00:00
Archive
Assembler
Bindings/Ocaml
Bitcode	More replacing of target-dependent intrinsics with target-indepdent	2012-07-18 00:02:16 +00:00
BugPoint
CodeGen	Add a much more conservative strategy for aligning branch targets.	2012-08-07 09:45:24 +00:00
DebugInfo	Temporarily revert c23b933d5f. It's causing	2012-08-01 18:19:01 +00:00
ExecutionEngine
Feature
Instrumentation	revert r160742: it's breaking CMake build	2012-07-25 18:49:28 +00:00
Integer
Linker
MC	The define for 64 bit sign extension neglected to	2012-08-07 00:35:22 +00:00
Object	Move test yaml files under Inputs until they are converted to be the actual	2012-08-02 21:52:49 +00:00
Other
Scripts
TableGen
Transforms	PR13095: Give an inline cost bonus to functions using byval arguments.	2012-08-07 11:13:19 +00:00
Unit
Verifier	Fix a typo (the the => the)	2012-07-23 08:51:15 +00:00
YAMLParser
CMakeLists.txt	[CMake] Add yaml2obj to check-llvm.	2012-08-03 00:45:32 +00:00
lit.cfg
lit.site.cfg.in
Makefile	fix 'make check' when ocamlopt returns the compiler path with CFLAGS (and there's a cflag with a = char)	2012-08-01 15:50:34 +00:00
Makefile.tests
TestRunner.sh