Chris Lattner dbab4dc942 implement a nice little efficiency hack in the inliner. Since we're now ... running IPSCCP early, and we run functionattrs interlaced with the inliner, we often (particularly for small or noop functions) completely propagate all of the information about a call to its call site in IPSSCP (making a call dead) and functionattrs is smart enough to realize that the function is readonly (because it is interlaced with inliner). To improve compile time and make the inliner threshold more accurate, realize that we don't have to inline dead readonly function calls. Instead, just delete the call. This happens all the time for C++ codes, here are some counters from opt/llvm-ld counting the number of times calls were deleted vs inlined on various apps: Tramp3d opt: 5033 inline - Number of call sites deleted, not inlined 24596 inline - Number of functions inlined llvm-ld: 667 inline - Number of functions deleted because all callers found 699 inline - Number of functions inlined 483.xalancbmk opt: 8096 inline - Number of call sites deleted, not inlined 62528 inline - Number of functions inlined llvm-ld: 217 inline - Number of allocas merged together 2158 inline - Number of functions inlined 471.omnetpp: 331 inline - Number of call sites deleted, not inlined 8981 inline - Number of functions inlined llvm-ld: 171 inline - Number of functions deleted because all callers found 629 inline - Number of functions inlined Deleting a call is much faster than inlining it, and is insensitive to the size of the callee. :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86975 91177308-0d34-0410-b5e6-96231b3b80d8		2009-11-12 07:56:08 +00:00
..
Analysis	- Teach LSR to avoid changing cmp iv stride if it will create an immediate that	2009-11-12 07:35:05 +00:00
Archive	Prune #includes from llvm/Linker.h and llvm/System/Path.h,	2009-08-23 22:45:37 +00:00
AsmParser	Fix MSVC warning ( | with bool and unsigned int).	2009-11-07 23:51:55 +00:00
Bitcode	Re-commit r86077 now that r86290 fixes the 179.art and 175.vpr ARM regressions.	2009-11-07 00:16:28 +00:00
CodeGen	RegScavenger::enterBasicBlock should always reset register state.	2009-11-12 07:49:10 +00:00
CompilerDriver	Remove dead code.	2009-11-11 04:10:24 +00:00
ExecutionEngine	Use stubs when we have them, otherwise use code we already have,	2009-11-12 03:12:18 +00:00
Linker	Fix MemoryBuffer::getSTDIN to *not* return null if stdin is empty, this is a lame API.	2009-11-10 00:43:58 +00:00
MC	Pass StringRef by value.	2009-11-06 10:58:06 +00:00
Support	Show command-line args and features passed into backend in debug output. Approved by Evan Cheng.	2009-11-11 03:23:46 +00:00
System	Revert commit 81144, and add a comment. It caused bugpoint timeouts	2009-11-08 20:55:48 +00:00
Target	Use table to separate opcode from operands.	2009-11-12 07:16:34 +00:00
Transforms	implement a nice little efficiency hack in the inliner. Since we're now	2009-11-12 07:56:08 +00:00
VMCore	Do not use StringRef in DebugInfo interface.	2009-11-12 00:50:58 +00:00
Makefile	remove llvm-db: it is completely broken and if anyone wants to do a debugger,	2009-10-05 02:29:51 +00:00