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93 Commits

Author SHA1 Message Date
David Goodwin
12dd99dc30 Rename registers to break output dependencies in addition to anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87015 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 19:08:21 +00:00
David Goodwin
c2e8a7e8d2 Fixed to address code review. No functional changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86634 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:48:55 +00:00
David Goodwin
0855dee564 Allow targets to specify register classes whose member registers should not be renamed to break anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86628 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:15:47 +00:00
David Goodwin
54097836f3 Break anti-dependencies using free registers in a round-robin manner to avoid introducing new anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86098 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 01:19:35 +00:00
David Goodwin
4de099d8ca Do a scheduling pass ignoring anti-dependencies to identify candidate registers that should be renamed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85939 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 20:57:50 +00:00
Dan Gohman
0ba90f3e34 Make -print-machineinstrs more readable. 
- Be consistent when referring to MachineBasicBlocks: BB#0.
 - Be consistent when referring to virtual registers: %reg1024.
 - Be consistent when referring to unknown physical registers: %physreg10.
 - Be consistent when referring to known physical registers: %RAX
 - Be consistent when referring to register 0: %reg0
 - Be consistent when printing alignments: align=16
 - Print jump table contents.
 - Don't print host addresses, in general.
 - and various other cleanups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85682 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-31 20:19:03 +00:00
David Goodwin
82c7248518 Make AntiDepReg.h internal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85412 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 18:29:54 +00:00
David Goodwin
e10deca33e Allow the aggressive anti-dep breaker to process the same region multiple times. This is necessary because new anti-dependencies are exposed when "current" ones are broken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85166 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 22:31:16 +00:00
David Goodwin
ada0ef86d9 Define virtual destructor in *.cpp file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85146 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:41:00 +00:00
David Goodwin
348777110a Add aggressive anti-dependence breaker. Currently it is not the default for any target. Enable with -break-anti-dependencies=all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85145 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:32:42 +00:00
David Goodwin
2e7be612d5 Break anti-dependence breaking out into its own class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85127 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 16:59:04 +00:00
Nick Lewycky
f5a86f45e7 Remove includes of Support/Compiler.h that are no longer needed after the 
VISIBILITY_HIDDEN removal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85043 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-25 06:57:41 +00:00
Nick Lewycky
6726b6d75a Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces. 
Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-25 06:33:48 +00:00
David Goodwin
4c3715c2e5 Allow the target to select the level of anti-dependence breaking that should be performed by the post-RA scheduler. The default is none. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84911 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-22 23:19:17 +00:00
Dan Gohman
c1ae8c9b8f Revert r84658 and r84691. They were causing llvm-gcc bootstrap to fail. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84727 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-21 01:44:44 +00:00
David Goodwin
7441d14873 Respect src register allocation requirements when breaking anti-dependencies. Remove some dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84691 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-20 22:50:43 +00:00
David Goodwin
480c529e02 Checkpoint more aggressive anti-dependency breaking for post-ra scheduler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84658 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-20 19:54:44 +00:00
Evan Cheng
fa16354e03 Change createPostRAScheduler so it can be turned off at llc -O1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84273 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-16 21:06:15 +00:00
Evan Cheng
c83da2f9e3 If post-alloc scheduler is not enabled, it should return false, not true. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84248 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-16 06:10:34 +00:00
David Goodwin
d452ea6a64 Add debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84011 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-13 19:16:03 +00:00
Dan Gohman
5bf7c2a346 Fix a missing initialization of PostRAScheduler's AA member. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83695 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-10 00:15:38 +00:00
Dan Gohman
a70dca156f Factor out LiveIntervalAnalysis' code to determine whether an instruction 
is trivially rematerializable and integrate it into
TargetInstrInfo::isTriviallyReMaterializable. This way, all places that
need to know whether an instruction is rematerializable will get the
same answer.

This enables the useful parts of the aggressive-remat option by
default -- using AliasAnalysis to determine whether a memory location
is invariant, and removes the questionable parts -- rematting operations
with virtual register inputs that may not be live everywhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83687 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-09 23:27:56 +00:00
Benjamin Kramer
8bff4af612 Fix a use-after-free in post-ra-scheduling. 
MI->addOperand invalidates references to it's operands, avoid touching
the operand after a new one was added.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83249 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-02 15:59:52 +00:00
David Goodwin
63bcbb72f7 All callee-saved registers are live-out of a return block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83223 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 23:28:47 +00:00
David Goodwin
9843a93e83 Remove neonfp attribute and instead set default based on CPU string. Add -arm-use-neon-fp to override the default. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83218 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 22:19:57 +00:00
David Goodwin
471850ab84 Restore the -post-RA-scheduler flag as an override for the target specification. Remove -mattr for setting PostRAScheduler enable and instead use CPU string. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83215 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 21:46:35 +00:00
David Goodwin
c7951f8e09 Use MachineFrameInfo.getPristineRegs() to determine which callee-saved registers are available for anti-dependency breaking. Some cleanup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83208 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 19:45:32 +00:00
Evan Cheng
714e8bc1fc Observe hasExtraSrcRegAllocReq and hasExtraDefRegAllocReq. Do not change 
operands of instructions with these properties while breaking anti-dep.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83198 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 08:26:23 +00:00
Reid Kleckner
c277ab08a2 Fix integer overflow in instruction scheduling. This can happen if we have 
basic blocks that are so long that their size overflows a short.

Also assert that overflow does not happen in the future, as requested by Evan.

This fixes PR4401.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83159 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-30 20:15:38 +00:00
David Goodwin
0dad89fa94 Remove -post-RA-schedule flag and add a TargetSubtarget method to enable post-register-allocation scheduling. By default it is off. For ARM, enable/disable with -mattr=+/-postrasched. Enable by default for cortex-a8. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83122 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-30 00:10:16 +00:00
Jakob Stoklund Olesen
544df3651e Use KILL instead of IMPLICIT_DEF in LowerSubregs pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83007 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-28 20:32:46 +00:00
David Goodwin
8f909345bc Fix bug in kill flag updating for post-register-allocation scheduling. When the kill flag of a superreg needs to be cleared because there are one or more subregs live, we instead add implicit-defs of those subregs and leave the kill flag on the superreg. This allows us to end the live-range of the superreg without ending the live-ranges of the subregs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82629 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-23 16:35:25 +00:00
Evan Cheng
fb2e752e41 Enhance EmitInstrWithCustomInserter() so target can specify CFG changes that sdisel will use to properly complete phi nodes. 
Not functionality change yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82273 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-18 21:02:19 +00:00
Benjamin Kramer
be441c0f34 It's a bool, so treat it like one. Fixes a MSVC warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81112 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-06 12:10:17 +00:00
David Goodwin
5e41178a6e Create our own block initializer for kill fixups as the scheduling one wasn't doing the right thing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80958 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-03 22:15:25 +00:00
David Goodwin
1f15228398 Add hidden flags to allow binary search of post-RA scheduling errors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80702 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-01 18:34:03 +00:00
David Goodwin
a3251db21a Don't mark a register live at an undef use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80621 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-31 20:47:02 +00:00
David Goodwin
7886cd85b2 Another stab at fixing up register kill flags after post-RA scheduling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80410 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-29 00:11:13 +00:00
David Goodwin
88a589c4b3 Fixup register kills after scheduling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80002 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-25 17:03:05 +00:00
Chris Lattner
103289e938 convert LoopInfo.h and GraphWriter.h to use raw_ostream 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79836 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-23 07:19:13 +00:00
David Goodwin
2ffb0ce7dc Fix counting of Post-RA scheduling stalls. Improve debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78843 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-12 21:47:46 +00:00
Dan Gohman
da2775767b This logic was accidentally inverted in r78767. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78773 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-12 01:44:20 +00:00
Dan Gohman
26255adcaa Factor out the code for finding an available register for use 
in breaking an anti-dependence into a separate function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78767 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-12 01:33:27 +00:00
David Goodwin
7cd0118c36 Use DEBUG macro for debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78694 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-11 17:56:42 +00:00
David Goodwin
c93d8373c9 Add some debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78687 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-11 17:35:23 +00:00
David Goodwin
3a5f0d444c Replace DOUT. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78634 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-11 01:44:26 +00:00
David Goodwin
d94a4e5d8d Post RA scheduler changes. Introduce a hazard recognizer that uses the target schedule information to accurately model the pipeline. Update the scheduler to correctly handle multi-issue targets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78563 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-10 15:55:25 +00:00
Dan Gohman
845012e6d3 Use setPreservesAll and setPreservesCFG in CodeGen passes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-31 23:37:33 +00:00
Chris Lattner
2a38688494 inline the global 'getInstrOperandRegClass' function into its callers 
now that TargetOperandInfo does the heavy lifting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77508 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-29 21:36:49 +00:00
Torok Edwin
c23197a26f llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable. 
This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75640 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-14 16:55:14 +00:00