Richard Sandiford 7271ac2c03 [SystemZ] Clean up register scavenging code ... SystemZ wants normal register scavenging slots, as close to the stack or frame pointer as possible. The only reason it was using custom code was because PrologEpilogInserter assumed an x86-like layout, where the frame pointer is at the opposite end of the frame from the stack pointer. This meant that when frame pointer elimination was disabled, the slots ended up being as close as possible to the incoming stack pointer, which is the opposite of what we want on SystemZ. This patch adds a new knob to say which layout is used and converts SystemZ to use target-independent scavenging slots. It's one of the pieces needed to support frame-to-frame MVCs, where two slots might be required. The ABI requires us to allocate 160 bytes for calls, so one approach would be to use that area as temporary spill space instead. It would need some surgery to make sure that the slot isn't live across a call though. I stuck to the "isFPCloseToIncomingSP - ..." style comment on the "do what the surrounding code does" principle. The FP case is already covered by several Systemz/frame-* tests, which fail without the PrologueEpilogueInserter change, so no new ones are needed. No behavioural change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185696 91177308-0d34-0410-b5e6-96231b3b80d8		2013-07-05 12:55:00 +00:00
..
CostTable.h	Moving Cost Tables up to share with other targets	2013-01-24 23:01:00 +00:00
Mangler.h	Don't reach into the middle of TargetMachine and cache one of its ivars.	2013-05-29 20:37:19 +00:00
Target.td	TableGen: Generate a function for getting operand indices based on their defined names	2013-06-25 21:22:09 +00:00
TargetCallingConv.h	Remove unused, undefined ArgFlagsTy::getArgFlagsString; add a comment about 'returned'	2013-04-21 18:05:20 +00:00
TargetCallingConv.td
TargetFrameLowering.h	[SystemZ] Clean up register scavenging code	2013-07-05 12:55:00 +00:00
TargetInstrInfo.h	DebugInfo: remove target-specific Frame Index handling for DBG_VALUE MachineInstrs	2013-06-16 20:34:27 +00:00
TargetIntrinsicInfo.h	Mark unimplemented copy constructors and copy assignment operators as LLVM_DELETED_FUNCTION.	2012-09-17 06:59:23 +00:00
TargetItinerary.td
TargetJITInfo.h	Sort the #include lines for the include/... tree with the script.	2012-12-03 17:02:12 +00:00
TargetLibraryInfo.h	Added posix function gettimeofday to LibFunc::Func for all platforms but Windows.	2013-07-03 04:00:51 +00:00
TargetLowering.h	The getRegForInlineAsmConstraint function should only accept MVT value types.	2013-06-22 18:37:38 +00:00
TargetLoweringObjectFile.h	[DebugInfo] Allow getDebugThreadLocalSymbol to return MCExpr	2013-07-02 18:47:09 +00:00
TargetMachine.h	Directly access objects which may change during compilation.	2013-06-17 20:41:25 +00:00
TargetOpcodes.h
TargetOptions.h	Remove static, because it was messing everything up.	2013-06-20 06:51:06 +00:00
TargetRegisterInfo.h	Add TargetRegisterInfo::getCoveringLanes().	2013-05-16 18:03:08 +00:00
TargetSchedule.td	Support BufferSize on ProcResGroup for unified MOp schedulers.	2013-06-15 04:50:06 +00:00
TargetSelectionDAG.td	Create an FPOW SDNode opcode def in the target independent .td file rather than in a specific backend.	2013-05-22 06:36:09 +00:00
TargetSelectionDAGInfo.h	Track IR ordering of SelectionDAG nodes 2/4.	2013-05-25 02:42:55 +00:00
TargetSubtargetInfo.h	Use the 'target-features' and 'target-cpu' attributes to reset the subtarget features.	2013-02-15 22:31:27 +00:00