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* Reimplement the parameter attributes support, phase #1. hilights:Chris Lattner2008-03-1234-1630/+1320
| | | | | | | | | | | | | | | | | | | | | | | | | 1. There is now a "PAListPtr" class, which is a smart pointer around the underlying uniqued parameter attribute list object, and manages its refcount. It is now impossible to mess up the refcount. 2. PAListPtr is now the main interface to the underlying object, and the underlying object is now completely opaque. 3. Implementation details like SmallVector and FoldingSet are now no longer part of the interface. 4. You can create a PAListPtr with an arbitrary sequence of ParamAttrsWithIndex's, no need to make a SmallVector of a specific size (you can just use an array or scalar or vector if you wish). 5. All the client code that had to check for a null pointer before dereferencing the pointer is simplified to just access the PAListPtr directly. 6. The interfaces for adding attrs to a list and removing them is a bit simpler. Phase #2 will rename some stuff (e.g. PAListPtr) and do other less invasive changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48289 91177308-0d34-0410-b5e6-96231b3b80d8
* no need to keep around this output.Chris Lattner2008-03-121-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48285 91177308-0d34-0410-b5e6-96231b3b80d8
* Document an implementation detail about EXTRACT_SUBREG and INSERT_SUBREG ↵Evan Cheng2008-03-121-0/+3
| | | | | | sub-register operand. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48283 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve the return slot optimization to be both more aggressive (not limited ↵Owen Anderson2008-03-122-95/+113
| | | | | | | | | | to sret parameters), and safer (when the passed pointer might be invalid). Thanks to Duncan and Chris for the idea behind this, and extra thanks to Duncan for helping me work out the trap-safety. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48280 91177308-0d34-0410-b5e6-96231b3b80d8
* Clean up my own mess.Evan Cheng2008-03-123-7/+15
| | | | | | | X86 lowering normalize vector 0 to v4i32. However DAGCombine can fold (sub x, x) -> 0 after legalization. It can create a zero vector of a type that's not expected (e.g. v8i16). We don't want to disable the optimization since leaving a (sub x, x) is really bad. Add isel patterns for other types of vector 0 to ensure correctness. It's highly unlikely to happen other than in bugpoint reduced test cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48279 91177308-0d34-0410-b5e6-96231b3b80d8
* We also need to collect the VN IDs for the PHI instructions for later updating.Owen Anderson2008-03-121-1/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48278 91177308-0d34-0410-b5e6-96231b3b80d8
* When we're determining what registers to coallesce, track the VNInfo IDs for ↵Owen Anderson2008-03-121-16/+32
| | | | | | | | | the definitions that feed the PHI instructions. We'll need these IDs in order to update LiveIntervals properly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48277 91177308-0d34-0410-b5e6-96231b3b80d8
* when the bitcode reader is referencing a paramattr, make sure to bump its ↵Chris Lattner2008-03-121-1/+12
| | | | | | refcount. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48276 91177308-0d34-0410-b5e6-96231b3b80d8
* Total brain cramp.Evan Cheng2008-03-121-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48274 91177308-0d34-0410-b5e6-96231b3b80d8
* This is a simple fix for getting error messages from dlerror inChris Lattner2008-03-121-1/+2
| | | | | | | | | | LoadLibraryPermanently. The current code modifies the value of a pointer that is passed by value, so the caller never gets the message. Patch by Julien Lerouge! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48270 91177308-0d34-0410-b5e6-96231b3b80d8
* One more bit of Altivec parameter passing.Dale Johannesen2008-03-121-3/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48269 91177308-0d34-0410-b5e6-96231b3b80d8
* Be backward compatibleAnton Korobeynikov2008-03-121-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48268 91177308-0d34-0410-b5e6-96231b3b80d8
* Check multiple return values.Devang Patel2008-03-121-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48267 91177308-0d34-0410-b5e6-96231b3b80d8
* Make this test x86-specific for now; targets that don't useDan Gohman2008-03-121-1/+1
| | | | | | | | the automated CallingConv code to handle return values typically don't support multiple return values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48265 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement Altivec passing to varargs functions on ppc.Dale Johannesen2008-03-121-7/+72
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48264 91177308-0d34-0410-b5e6-96231b3b80d8
* Set NextMII after issuing a physical register spill.Evan Cheng2008-03-121-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48263 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix attribute handling.Devang Patel2008-03-122-14/+21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48262 91177308-0d34-0410-b5e6-96231b3b80d8
* Minor debug output bug.Evan Cheng2008-03-121-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48261 91177308-0d34-0410-b5e6-96231b3b80d8
* Basic feature test for multiple return values in codegen.Dan Gohman2008-03-111-0/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48260 91177308-0d34-0410-b5e6-96231b3b80d8
* Ultimately resolve aliases during linking, if possibleAnton Korobeynikov2008-03-111-5/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48259 91177308-0d34-0410-b5e6-96231b3b80d8
* Testcase for PR2137Anton Korobeynikov2008-03-111-0/+37
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48258 91177308-0d34-0410-b5e6-96231b3b80d8
* Correctly propagate thread-local flag from aliasee to alias. This fixes PR2137Anton Korobeynikov2008-03-112-3/+18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48257 91177308-0d34-0410-b5e6-96231b3b80d8
* Use PassManagerBase instead of FunctionPassManager for functionsDan Gohman2008-03-1125-89/+85
| | | | | | | | | that merely add passes. This allows them to be used with either FunctionPassManager or PassManager, or even with a custom new kind of pass manager. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48256 91177308-0d34-0410-b5e6-96231b3b80d8
* Add helper for ultimate aliasee resoltionAnton Korobeynikov2008-03-112-1/+22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48255 91177308-0d34-0410-b5e6-96231b3b80d8
* Handle multiple ret values.Devang Patel2008-03-112-21/+79
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48254 91177308-0d34-0410-b5e6-96231b3b80d8
* Initialize.Devang Patel2008-03-111-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48253 91177308-0d34-0410-b5e6-96231b3b80d8
* Check to see if a two-entry PHI block can be simplifiedDan Gohman2008-03-112-6/+21
| | | | | | | | | before trying to merge the block into its predecessors. This allows two-entry-phi-return.ll to be simplified into a single basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48252 91177308-0d34-0410-b5e6-96231b3b80d8
* Make this test more challenging to help it avoid beingDan Gohman2008-03-111-2/+8
| | | | | | | optimized away before it tests what it is intended to test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48251 91177308-0d34-0410-b5e6-96231b3b80d8
* Update testcase for recent aliases changeAnton Korobeynikov2008-03-111-2/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48250 91177308-0d34-0410-b5e6-96231b3b80d8
* Honour aliases visibility during asm emissionAnton Korobeynikov2008-03-111-1/+9
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48249 91177308-0d34-0410-b5e6-96231b3b80d8
* Honour aliases visibility when reading from/writing to bitcodeAnton Korobeynikov2008-03-112-1/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48248 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a test to ensure that all-ones vectors are materialized with pcmpeqd.Dan Gohman2008-03-111-0/+14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48247 91177308-0d34-0410-b5e6-96231b3b80d8
* Transfer physical register spill info when load / store folding happens.Evan Cheng2008-03-113-1/+20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48246 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the correct value for InSignBit.Dan Gohman2008-03-112-1/+24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48245 91177308-0d34-0410-b5e6-96231b3b80d8
* Initial codegen support for functions and calls with multiple return values.Dan Gohman2008-03-111-18/+51
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48244 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement basic support for the 'f' register class constraint. This basicallyChris Lattner2008-03-112-2/+59
| | | | | | | works, but probably won't if you mix it with 't' or 'u' yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48243 91177308-0d34-0410-b5e6-96231b3b80d8
* coalesce away 80-bit floating point copies.Chris Lattner2008-03-111-4/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48241 91177308-0d34-0410-b5e6-96231b3b80d8
* convert a massive if statement to a switch.Chris Lattner2008-03-111-19/+32
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48240 91177308-0d34-0410-b5e6-96231b3b80d8
* start handling the 'f' x87 constraint.Chris Lattner2008-03-111-0/+9
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48239 91177308-0d34-0410-b5e6-96231b3b80d8
* Skip functions that return multiple values.Devang Patel2008-03-111-0/+3
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* The feature this is testing did not work in the general case,Dale Johannesen2008-03-111-17/+0
| | | | | | | | and has been removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48232 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix getOperand() for ReturnInst.Devang Patel2008-03-111-2/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48229 91177308-0d34-0410-b5e6-96231b3b80d8
* Become multiple return value aware.Devang Patel2008-03-111-1/+5
| | | | | | | | Right now, the pass does not optimize tail recursions involving multiple return values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48228 91177308-0d34-0410-b5e6-96231b3b80d8
* Add TODO reminder.Devang Patel2008-03-111-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48227 91177308-0d34-0410-b5e6-96231b3b80d8
* Give PassManager and FunctionPassManager a common base class, withDan Gohman2008-03-112-3/+17
| | | | | | | | | add(Pass *) as a pure virtual member function. This will allow all the various addPassesTo* functions in LLVM to avoid hard-coding what type of PassManager is used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48226 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix typos in comments.Dan Gohman2008-03-111-2/+2
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* Missed part of recommit.Christopher Lamb2008-03-111-4/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48224 91177308-0d34-0410-b5e6-96231b3b80d8
* Recommitting parts of r48130. These do not appear to cause the observed ↵Christopher Lamb2008-03-118-47/+68
| | | | | | failures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48223 91177308-0d34-0410-b5e6-96231b3b80d8
* Recommitting changes after more testing. These appear to cause no problems.Christopher Lamb2008-03-112-2/+8
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* Use TargetRegisterInfo::getPhysicalRegisterRegClass. Remove duplicated code.Evan Cheng2008-03-111-21/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48221 91177308-0d34-0410-b5e6-96231b3b80d8
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