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
..
ADT	Revert "Revert "[APFloat] Removed APFloat constructor which initialized to either zero/NaN but allowed you to arbitrarily set the category of the float.""	2013-06-27 21:58:19 +00:00
Analysis	extending the interface of Dependence slightly to support future work	2013-06-28 23:34:23 +00:00
Assembly	Enable *BasicBlockPass::createPrinterPass()	2013-02-08 23:37:41 +00:00
Bitcode	Move lib/Archive to tools/llvm-ar.	2013-06-17 15:47:20 +00:00
CodeGen	Remove the EXCEPTIONADDR, EHSELECTION, and LSDAADDR ISD opcodes.	2013-07-04 13:54:20 +00:00
Config	Reapply r185601 with a fix for the cmake build.	2013-07-04 01:10:38 +00:00
DebugInfo	llvm-dwarfdump: Add support for dumping the .debug_loc section	2013-06-19 21:37:13 +00:00
ExecutionEngine	Revising the MCJIT ObjectCache interface to allow subclasses to avoid retaining references to returned objects	2013-06-28 21:40:16 +00:00
IR	Fix extra whitespace / formatting	2013-06-28 23:24:05 +00:00
IRReader	Split out the IRReader header and the utility functions it provides into	2013-03-26 02:25:37 +00:00
MC	Remove use of asymmetric std::lower_bound comparator.	2013-07-04 23:20:12 +00:00
Object	Use the raw member names in Archive::Archive.	2013-07-05 03:35:15 +00:00
Option	Merge changes to clang's Driver code into LLVM's Option library	2013-06-13 18:12:12 +00:00
Support	Changing long to int for consistency.	2013-07-04 17:05:21 +00:00
TableGen	Fix up some asserts that are within an if statement. This removes the need	2013-07-01 23:42:53 +00:00
Target	[SystemZ] Clean up register scavenging code	2013-07-05 12:55:00 +00:00
Transforms	Remove limitation on DebugIR that made it require existing debug metadata.	2013-06-28 19:05:23 +00:00
AutoUpgrade.h	remove autoupgrade support for really old-style debug info intrinsics.	2011-11-27 06:18:33 +00:00
CMakeLists.txt	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
DebugInfo.h	Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size.	2013-07-03 15:07:05 +00:00
DIBuilder.h	Rename DIBuilder::createNullPtrType to createUnspecifiedType and introduce	2013-06-27 22:50:59 +00:00
GVMaterializer.h	Fix include guards so they exactly match file names.	2013-01-10 00:45:19 +00:00
InitializePasses.h	Remove the simplify-libcalls pass (finally)	2013-06-20 19:48:07 +00:00
InstVisitor.h	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LinkAllIR.h	Rename LinkAllVMCore.h to LinkAllIR.h since VMCore directory was renamed to IR.	2013-01-10 21:55:02 +00:00
LinkAllPasses.h	Remove the simplify-libcalls pass (finally)	2013-06-20 19:48:07 +00:00
Linker.h	Fix a performance bug in the Linker.	2013-05-04 05:05:18 +00:00
Pass.h	moves doInitialization and doFinalization to the Pass class and removes some unreachable code in MachineModuleInfo	2012-12-03 21:56:57 +00:00
PassAnalysisSupport.h	Fix include guards so they exactly match file names.	2013-01-10 00:45:19 +00:00
PassManager.h	This patch breaks up Wrap.h so that it does not have to include all of	2013-05-01 20:59:00 +00:00
PassManagers.h	Use a DenseMap instead of a std::map for AnalysisID -> Pass* maps. This reduces the pass-manager overhead from FPPassManager::runOnFunction() by about 10%.	2013-02-26 01:31:59 +00:00
PassRegistry.h	This patch breaks up Wrap.h so that it does not have to include all of	2013-05-01 20:59:00 +00:00
PassSupport.h	Fix include guards so they exactly match file names.	2013-01-10 00:45:19 +00:00