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With the SVR4 ABI on PowerPC, vector arguments for vararg calls are passed differently depending on whether they are a fixed or a variable argument. Variable vector arguments always go into memory, fixed vector arguments are put into vector registers. If there are no free vector registers available, fixed vector arguments are put on the stack. The NumFixedArgs attribute allows to decide for an argument in a vararg call whether it belongs to the fixed or variable portion of the parameter list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74764 91177308-0d34-0410-b5e6-96231b3b80d8 |
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AsmPrinter | ||
CMakeLists.txt | ||
IA64.h | ||
IA64.td | ||
IA64Bundling.cpp | ||
IA64InstrBuilder.h | ||
IA64InstrFormats.td | ||
IA64InstrInfo.cpp | ||
IA64InstrInfo.h | ||
IA64InstrInfo.td | ||
IA64ISelDAGToDAG.cpp | ||
IA64ISelLowering.cpp | ||
IA64ISelLowering.h | ||
IA64MachineFunctionInfo.h | ||
IA64RegisterInfo.cpp | ||
IA64RegisterInfo.h | ||
IA64RegisterInfo.td | ||
IA64Subtarget.cpp | ||
IA64Subtarget.h | ||
IA64TargetAsmInfo.cpp | ||
IA64TargetAsmInfo.h | ||
IA64TargetMachine.cpp | ||
IA64TargetMachine.h | ||
Makefile | ||
README |
TODO: - Un-bitrot ISel - Hook up If-Conversion a la ARM target - Hook up all branch analysis functions - Instruction scheduling - Bundling - Dynamic Optimization - Testing and bugfixing - stop passing FP args in both FP *and* integer regs when not required - allocate low (nonstacked) registers more aggressively - clean up and thoroughly test the isel patterns. - fix stacked register allocation order: (for readability) we don't want the out? registers being the first ones used - fix up floating point (nb http://gcc.gnu.org/wiki?pagename=ia64%20floating%20point ) - bundling! (we will avoid the mess that is: http://gcc.gnu.org/ml/gcc/2003-12/msg00832.html ) - instruction scheduling (hmmmm! ;) - counted loop support - make integer + FP mul/div more clever (we have fixed pseudocode atm) - track and use comparison complements INFO: - we are strictly LP64 here, no support for ILP32 on HP-UX. Linux users don't need to worry about this. - i have instruction scheduling/bundling pseudocode, that really works (has been tested, albeit at the perl-script level). so, before you go write your own, send me an email! KNOWN DEFECTS AT THE CURRENT TIME: - C++ vtables contain naked function pointers, not function descriptors, which is bad. see http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=406 - varargs are broken - alloca doesn't work (indeed, stack frame layout is bogus) - no support for big-endian environments - (not really the backend, but...) the CFE has some issues on IA64. these will probably be fixed soon. ACKNOWLEDGEMENTS: - Chris Lattner (x100) - Other LLVM developers ("hey, that looks familiar") CONTACT: - You can email me at duraid@octopus.com.au. If you find a small bug, just email me. If you find a big bug, please file a bug report in bugzilla! http://llvm.cs.uiuc.edu is your one stop shop for all things LLVM.