Quentin Colombet e9a4e0681e [PeepholeOptimizer] Advanced rewriting of copies to avoid cross register banks ... copies. This patch extends the peephole optimization introduced in r190713 to produce register-coalescer friendly copies when possible. This extension taught the existing cross-bank copy optimization how to deal with the instructions that generate cross-bank copies, i.e., insert_subreg, extract_subreg, reg_sequence, and subreg_to_reg. E.g. b = insert_subreg e, A, sub0 <-- cross-bank copy ... C = copy b.sub0 <-- cross-bank copy Would produce the following code: b = insert_subreg e, A, sub0 <-- cross-bank copy ... C = copy A <-- same-bank copy This patch also introduces a new helper class for that: ValueTracker. This class implements the logic to look through the copy related instructions and get the related source. For now, the advanced rewriting is disabled by default as we are lacking the semantic on target specific instructions to catch the motivating examples. Related to <rdar://problem/12702965>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212100 91177308-0d34-0410-b5e6-96231b3b80d8		2014-07-01 14:33:36 +00:00
..
Analysis	Suppress inlining when the block address is taken	2014-07-01 00:19:34 +00:00
AsmParser	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
Bitcode	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
CodeGen	[PeepholeOptimizer] Advanced rewriting of copies to avoid cross register banks	2014-07-01 14:33:36 +00:00
DebugInfo
ExecutionEngine	ExecutionEngine::create(): fix interpreter fallback when JIT is unavailable	2014-07-01 03:18:49 +00:00
IR	Revert "DebugInfo: Ensure that all debug location scope chains from instructions within a function, lead to the function itself."	2014-07-01 04:11:45 +00:00
IRReader
LineEditor
Linker	Include <tuple> to make buildbots happy	2014-06-27 18:38:12 +00:00
LTO	Use a range loop. No functionality change.	2014-06-28 18:44:59 +00:00
MC	Fix .seh_stackalloc 0	2014-07-01 00:42:47 +00:00
Object	Speculatively fix some code handling Power64 MachO files	2014-06-30 20:12:59 +00:00
Option
ProfileData
Support	Remove obsolete function TargetRegistry::getClosestTargetForJIT()	2014-07-01 10:47:13 +00:00
TableGen
Target	Fix .seh_stackalloc 0	2014-07-01 00:42:47 +00:00
Transforms	GlobalOpt: Handle non-zero offsets for aliases	2014-07-01 00:30:56 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile