Alkis Evlogimenos 9c22aeb0b2 Improve allocation order: ... 1) For 8-bit registers try to use first the ones that are parts of the same register (AL then AH). This way we only alias 2 16/32-bit registers after allocating 4 8-bit variables. 2) Move EBX as the last register to allocate. This will cause less spills to happen since we will have 8-bit registers available up to register excaustion (assuming we use the allocation order). It would be nice if we could push all of the 8-bit aliased registers towards the end but we much prefer to keep callee saved register to the end to avoid saving them on entry and exit of the function. For example this gives a slight reduction of spills with linear scan on 164.gzip. Before: 11221 asm-printer - Number of machine instrs printed 975 spiller - Number of loads added 675 spiller - Number of stores added 398 spiller - Number of register spills After: 11182 asm-printer - Number of machine instrs printed 952 spiller - Number of loads added 652 spiller - Number of stores added 386 spiller - Number of register spills git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11996 91177308-0d34-0410-b5e6-96231b3b80d8		2004-02-29 09:17:01 +00:00
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CBackend	Fixes for PR258 and PR259.	2004-02-26 22:20:58 +00:00
PowerPC	fine grainify namespacification	2004-02-28 19:53:18 +00:00
Sparc	Adjust to change in TII ctor arguments	2004-02-29 06:31:44 +00:00
SparcV8	Adjust to change in TII ctor arguments	2004-02-29 06:31:44 +00:00
SparcV9	Remove dead member variables of SparcV9SchedInfo and TargetSchedInfo	2004-02-29 08:40:03 +00:00
X86	Improve allocation order:	2004-02-29 09:17:01 +00:00
Makefile	SparcV8 now builds.	2004-02-28 19:54:00 +00:00
MRegisterInfo.cpp	Put all LLVM code into the llvm namespace, as per bug 109.	2003-11-11 22:41:34 +00:00
Target.td	Expose the "Other" value type to tablegen targets	2004-02-11 03:08:45 +00:00
TargetData.cpp	Use a map instead of annotations	2004-02-26 08:02:17 +00:00
TargetInstrInfo.cpp	Adjust to change in TII ctor arguments	2004-02-29 06:31:44 +00:00
TargetMachine.cpp	Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering	2003-12-28 21:23:38 +00:00
TargetSchedInfo.cpp	Eliminate the distinction between "real" and "unreal" instructions	2004-02-29 06:31:16 +00:00