Jakob Stoklund Olesen 40d07bbebb Add CoalescerPair helper class. ... Given a copy instruction, CoalescerPair can determine which registers to coalesce in order to eliminate the copy. It deals with all the subreg fun to determine a tuple (DstReg, SrcReg, SubIdx) such that: - SrcReg is a virtual register that will disappear after coalescing. - DstReg is a virtual or physical register whose live range will be extended. - SubIdx is 0 when DstReg is a physical register. - SrcReg can be joined with DstReg:SubIdx. CoalescerPair::isCoalescable() determines if another copy instruction is compatible with the same tuple. This fixes some NEON miscompilations where shuffles are getting coalesced as if they were copies. The CoalescerPair class will replace a lot of the spaghetti logic in JoinCopy later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105997 91177308-0d34-0410-b5e6-96231b3b80d8		2010-06-15 16:04:21 +00:00
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Analysis	Support for nested functions/classes in debug output. (Again.) Radar 7424645.	2010-06-11 20:08:44 +00:00
Archive	Eliminate some unnessary Path::exists() calls.	2010-05-27 20:51:54 +00:00
AsmParser	Eliminate the restriction that the array size in an alloca must be i32.	2010-05-28 01:14:11 +00:00
Bitcode	Speedup bitcode writer. Do not walk all values for all functions to emit function local metadata. In one testcase, probably worst case scenario, the 70x speed up is seen.	2010-06-02 23:05:04 +00:00
CodeGen	Add CoalescerPair helper class.	2010-06-15 16:04:21 +00:00
CompilerDriver	Print a space after the colon.	2010-05-20 21:11:37 +00:00
ExecutionEngine	improve portability to systems that don't have powf/modf (e.g. solaris 9)	2010-05-15 17:10:24 +00:00
Linker	Add basic error checking to MemoryBuffer::getSTDIN.	2010-05-27 17:31:51 +00:00
MC	Don't call flush() at a library level which isn't checking for errors	2010-06-01 16:31:34 +00:00
Support	Use const_iterator where appropriate.	2010-06-08 17:21:57 +00:00
System	Avoid "variable 'bits' set but not used [-Wunused-but-set-variable]"	2010-06-10 16:23:15 +00:00
Target	Add <cstddef> include to get ptrdiff_t, for gcc-4.6; patch by Dimitry Andric.	2010-06-15 14:50:42 +00:00
Transforms	jump threading can't split a critical edge from an indirectbr. This	2010-06-14 19:45:43 +00:00
VMCore	improve verifier error about unterminated block to include	2010-06-12 15:50:24 +00:00
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