Andrew Lenharth aeef8fc5c6 Add support for a cycle counter intrinsic. As basically all processors have ... this and have it in about the same form, I think this makes sense. on X86, you do a RDTSC (64bit result, from any ring since the P5MMX) on Alpha, you do a RDCC on PPC, there is a sequence which may or may not work depending on how things are setup by the OS. Or something like that. Maybe someone who knows PPC can add support. Something about the time base register. on Sparc, you read %tick, which in some solaris versions (>=8) is readable by userspace on IA64 read ar.itc So I think the ulong is justified since all of those are 64bit. Support is slighly flaky on old chips (P5 and lower) and sometimes depends on OS (PPC, Sparc). But for modern OS/Hardware (aka this decade), we should be ok. I am still not sure what to do about lowering. I can either see a lower to 0, to gettimeofday (or the target os equivalent), or loudly complaining and refusing to continue. I am commiting an Alpha implementation. I will add the X86 implementation if I have to (I have use of it in the near future), but if someone who knows that backend (and the funky multi-register results) better wants to add it, it would take them a lot less time ;) TODO: better lowering and legalizing, and support more platforms git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24299 91177308-0d34-0410-b5e6-96231b3b80d8		2005-11-11 16:45:18 +00:00
..
ADT	Fix comment.	2005-10-26 15:02:21 +00:00
Analysis	remove a dead header	2005-10-29 04:43:10 +00:00
Assembly
Bytecode
CodeGen	Add support for a cycle counter intrinsic. As basically all processors have	2005-11-11 16:45:18 +00:00
Config
Debugger
ExecutionEngine
Support	Allow per-character control over what target assemblers allow in symbol	2005-11-10 21:39:12 +00:00
System
Target	Add a new option to indicate we want the code generator to emit code quickly,	2005-11-08 02:12:47 +00:00
Transforms	needs to go here to apparently.	2005-11-10 02:07:45 +00:00
AbstractTypeUser.h
Argument.h
BasicBlock.h	Remove some dead argument names which irritates GCC at certain warning levels.	2005-10-25 17:59:28 +00:00
CallGraphSCCPass.h
CallingConv.h
Constant.h	Remove some dead argument names which irritates GCC at certain warning levels.	2005-10-25 17:59:28 +00:00
Constants.h	Change the signature of replaceUsesOfWithOnConstant to take a Use* and not	2005-10-04 18:12:13 +00:00
DerivedTypes.h
Function.h	Add a missing Module::setTargetTriple method.	2005-10-25 17:58:00 +00:00
GlobalValue.h	Make sure to initialize the alignment field	2005-11-06 08:22:18 +00:00
GlobalVariable.h	Change the signature of replaceUsesOfWithOnConstant to take a Use* and not	2005-10-04 18:12:13 +00:00
InstrTypes.h
Instruction.def
Instruction.h	Remove some dead argument names which irritates GCC at certain warning levels.	2005-10-25 17:59:28 +00:00
Instructions.h	add an accessor	2005-11-05 21:58:30 +00:00
IntrinsicInst.h
Intrinsics.h	Add support for a cycle counter intrinsic. As basically all processors have	2005-11-11 16:45:18 +00:00
Linker.h
Module.h	Add a missing Module::setTargetTriple method.	2005-10-25 17:58:00 +00:00
ModuleProvider.h
Pass.h
PassAnalysisSupport.h
PassManager.h
PassSupport.h
SymbolTable.h
SymbolTableListTraits.h
Type.h
Use.h
User.h
Value.h	remove a comma to compile with pedantic gcc	2005-10-08 01:24:19 +00:00