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path: root/lib/CodeGen/PrologEpilogInserter.cpp
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2007-05-01If call frame is not part of stack frame and no dynamic alloc, ↵Evan Cheng
eliminateFrameIndex() must adjust SP offset with size of call frames. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36625 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-01Under normal circumstances, when a frame pointer is not required, we reserveEvan Cheng
argument space for call sites in the function immediately on entry to the current function. This eliminates the need for add/sub sp brackets around call sites. However, this is not always a good idea. If the "call frame" is large and the target load / store instructions have small immediate field to encode sp offset, this can cause poor codegen. In the worst case, this can make it impossible to scavenge a register if the reserved spill slot is pushed too far apart from sp / fp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36607 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-25Match MachineFunction::UsedPhysRegs changes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36452 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-25support for >4G stack framesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36425 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-25support > 4G stack objectsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36422 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Fix a bug introduced with my previous patch, where it didn't correctly handleChris Lattner
instructions which replace themselves when FI's are rewritten (common on ppc). This fixes CodeGen/PowerPC/2006-10-17-ppc64-alloca.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35789 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Fix CodeGen/Generic/2007-04-08-MultipleFrameIndices.ll and PR1308:Chris Lattner
some instructions can have multiple frame indices in them. If this happens, rewrite all of them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35785 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-06If target decides to create an emergency spill slot, make sure it's closest ↵Evan Cheng
to SP or frame pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34965 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-01Delete register scavenger when done with it.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34786 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-01Interface clean up.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34772 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-28add a newline at end of fileChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34735 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-28Make requiresRegisterScavenging determination on a per MachineFunction basis.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34711 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-28MRegisterInfo disowns RegScavenger. It's immutable.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34706 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-27Let MRegisterInfo now owns RegScavenger.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34691 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-27forward() should not increment internal iterator. Its client may insert ↵Evan Cheng
instruction between now and next forward() call. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34649 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-23First potential client of register scavenger.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34516 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-26Change the MachineDebugInfo to MachineModuleInfo to better reflect usageJim Laskey
for debugging and exception handling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33550 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-25Added a MRegisterInfo hook that tells PEI the target is responsible forEvan Cheng
rounding the stack frame to a multiple of stack alignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33504 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-23PEI is now responsible for adding MaxCallFrameSize to frame size and align ↵Evan Cheng
the stack. Each target can further adjust the frame size if necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33460 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-20Remove an unused variable.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33396 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-20We not align the final stack slot but instead let the target do so in ↵Evan Cheng
emitPrologue(). Each target can make adjustments to the stack frame and re-align the stack as it deem appropriate. Do not align it twice which can end up wasting stack space. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33387 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-02- Fixing naming inconsistency: calleesave -> calleesaved.Evan Cheng
- Make use of spillCalleeSavedRegisters() and restoreCalleeSavedRegisters(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32822 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-07Initialize {Min|Max}CSFrameIndex properly.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32299 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-28TargetRegisterClass specifies the desired spill alignment. However, it ↵Evan Cheng
cannot be honored if stack alignment is smaller. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30648 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-28PEI now place callee save spills closest to the address pointed to by theEvan Cheng
incoming stack. This allows X86 backend to use push / pop in epilogue / prologue. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30636 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-26Rename function. It's determining which callee-save registers to save.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30616 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-27s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-25Tidy up.Jim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29888 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-25Consolidate callee saved register information so that it can me used by debugJim Laskey
information and exception handling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29881 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28Shave another 27K off libllvmgcc.dylib with visibility hiddenChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28973 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-12Remove dead variableChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28253 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-07Foundation for call frame information.Jim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27491 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-03The stack alignment is now computed dynamically, just verify it is correct.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27380 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-06Always compute max align.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24227 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-06Add the necessary support to the ISel to allow targets to codegen the newNate Begeman
alignment information appropriately. Includes code for PowerPC to support fixed-size allocas with alignment larger than the stack. Support for arbitrarily aligned dynamic allocas coming soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24224 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30now that we have a reg class to spill with, get this info from the regclassChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23559 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30Now that we have getCalleeSaveRegClasses() info, use it to pass the registerChris Lattner
class into the spill/reload methods. Targets can now rely on that argument. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23556 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30Change this code ot pass register classes into the stack slot spiller/reloaderChris Lattner
code. PrologEpilogInserter hasn't been updated yet though, so targets cannot use this info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23536 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29Fix a bug in my previous patch that was using the wrong iterator. This fixesChris Lattner
Olden/bisort among others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23124 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26Make this code safe for when loadRegFromStackSlot inserts multiple instructions.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23108 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-15When inserting callee-save register reloads, make sure to skip over anyChris Lattner
terminator instructions before the 'ret' in case the target has a multi-instruction return sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22041 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13Tolerate instrs with extra argsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21982 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-21Remove trailing whitespaceMisha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-23Simplify/speedup the PEI by not having to scan for uses of the callee savedChris Lattner
registers. This information is computed directly by the register allocator now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19795 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-23Speed this up a bit by making ModifiedRegs a vector<char> not vector<bool>Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19787 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-22Implicitly defined registers can clobber callee saved registers too!Chris Lattner
This fixes the return-address-not-being-saved problem in the Alpha backend. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19741 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-19Add an assertion that would have made more sense to duraidChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19704 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-29Put this change back in after testing from Reid proved its innocence. ↵Nate Begeman
getSpillSize now returns value in bits git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16102 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-27Back out change to divide getSpillSize by 8 until I figure out why it breaks ↵Nate Begeman
x86, which has register sizes in bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16073 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-27Register sizes are in bits, not bytesNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16070 91177308-0d34-0410-b5e6-96231b3b80d8
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