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* Update aosp/master llvm for rebase to r233350Pirama Arumuga Nainar2015-04-091-1/+1
| | | | Change-Id: I07d935f8793ee8ec6b7da003f6483046594bca49
* Don't run RAFast in the optimizing regalloc pipeline.Jakob Stoklund Olesen2012-06-081-1/+1
| | | | | | | | | | | The fast register allocator is not supposed to work in the optimizing pipeline. It doesn't make sense to compute live intervals, run full copy coalescing, and then run RAFast. Fast register allocation in the optimizing pipeline is better done by RABasic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158242 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the local register allocator.Jakob Stoklund Olesen2010-06-151-1/+0
| | | | | | Please use the fast allocator instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106051 91177308-0d34-0410-b5e6-96231b3b80d8
* Only use clairvoyance when defining a register, and then only if it has one use.Jakob Stoklund Olesen2010-05-171-9/+5
| | | | | | This makes allocation independent on the ordering of use-def chains. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103935 91177308-0d34-0410-b5e6-96231b3b80d8
* Take allocation hints from copy instructions to/from physregs.Jakob Stoklund Olesen2010-05-131-2/+2
| | | | | | This causes way more identity copies to be generated, ripe for coalescing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103686 91177308-0d34-0410-b5e6-96231b3b80d8
* Enable a bunch more -regalloc=fast testsJakob Stoklund Olesen2010-05-121-4/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103531 91177308-0d34-0410-b5e6-96231b3b80d8
* Adjust register numbers in tests to compensate for theDale Johannesen2010-02-161-2/+2
| | | | | | | | new lack of R2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96407 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply 95050 with a tweak to check the register class.Dale Johannesen2010-02-031-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95183 91177308-0d34-0410-b5e6-96231b3b80d8
* Test revert 95050; there's a good chance it's causingDale Johannesen2010-02-021-2/+2
| | | | | | | | buildbot failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95103 91177308-0d34-0410-b5e6-96231b3b80d8
* Make local RA smarter about reusing input register of a copyDale Johannesen2010-02-021-2/+2
| | | | | | | | | as output. Needed for (functional) correctness in inline asm, and should be generally beneficial. 7361612. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95050 91177308-0d34-0410-b5e6-96231b3b80d8
* Do better with physical reg operands (typically, from inline asm)Dale Johannesen2009-12-161-2/+2
| | | | | | | | | | | | | | | | | | | | in local register allocator. If a reg-reg copy has a phys reg input and a virt reg output, and this is the last use of the phys reg, assign the phys reg to the virt reg. If a reg-reg copy has a phys reg output and we need to reload its spilled input, reload it directly into the phys reg than passing it through another reg. Following 76208, there is sometimes no dependency between the def of a phys reg and its use; this creates a window where that phys reg can be used for spilling (this is true in linear scan also). This is bad and needs to be fixed a better way, although 76208 works too well in practice to be reverted. However, there should normally be no spilling within inline asm blocks. The patch here goes a long way towards making this actually be true. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91485 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate more uses of llvm-as and llvm-dis.Dan Gohman2009-09-091-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81293 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR3149. If an early clobber def is a physical register and it is tied to ↵Evan Cheng2008-12-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | an input operand, it effectively extends the live range of the physical register. Currently we do not have a good way to represent this. 172 %ECX<def> = MOV32rr %reg1039<kill> 180 INLINEASM <es:subl $5,$1 sbbl $3,$0>, 10, %EAX<def>, 14, %ECX<earlyclobber,def>, 9, %EAX<kill>, 36, <fi#0>, 1, %reg0, 0, 9, %ECX<kill>, 36, <fi#1>, 1, %reg0, 0 188 %EAX<def> = MOV32rr %EAX<kill> 196 %ECX<def> = MOV32rr %ECX<kill> 204 %ECX<def> = MOV32rr %ECX<kill> 212 %EAX<def> = MOV32rr %EAX<kill> 220 %EAX<def> = MOV32rr %EAX 228 %reg1039<def> = MOV32rr %ECX<kill> The early clobber operand ties ECX input to the ECX def. The live interval of ECX is represented as this: %reg20,inf = [46,47:1)[174,230:0) 0@174-(230) 1@46-(47) The right way to represent this is something like %reg20,inf = [46,47:2)[174,182:1)[181:230:0) 0@174-(182) 1@181-230 @2@46-(47) Of course that won't work since that means overlapping live ranges defined by two val#. The workaround for now is to add a bit to val# which says the val# is redefined by a early clobber def somewhere. This prevents the move at 228 from being optimized away by SimpleRegisterCoalescing::AdjustCopiesBackFrom. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61259 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove SelectionDag early allocation of registersDale Johannesen2008-09-241-2/+5
| | | | | | | | | for earlyclobbers. Teach Local RA about earlyclobber, and add some tests for it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56592 91177308-0d34-0410-b5e6-96231b3b80d8
* testcase for PR1357Chris Lattner2007-04-301-0/+27
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36598 91177308-0d34-0410-b5e6-96231b3b80d8
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