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3543 Commits

Author SHA1 Message Date
Chris Lattner
a767dbf197 Don't advance the hazard recognizer when there are no hazards and no instructions 
to be emitted.

Don't add one to the latency of a completed instruction if the latency of the
op is 0.

llvm-svn: 26718
 2006-03-12 09:01:41 +00:00
Chris Lattner
86a9b60a25 Chain operands aren't real uses: they don't require the full latency of the 
predecessor to finish before they can start.

llvm-svn: 26717
 2006-03-12 03:52:09 +00:00
Chris Lattner
572003ca15 As a pending queue data structure to keep track of instructions whose 
operands have all issued, but whose results are not yet available.  This
allows us to compile:

int G;
int test(int A, int B, int* P) {
   return (G+A)*(B+1);
}

to:

_test:
        lis r2, ha16(L_G$non_lazy_ptr)
        addi r4, r4, 1
        lwz r2, lo16(L_G$non_lazy_ptr)(r2)
        lwz r2, 0(r2)
        add r2, r2, r3
        mullw r3, r2, r4
        blr

instead of this, which has a stall between the lis/lwz:

_test:
        lis r2, ha16(L_G$non_lazy_ptr)
        lwz r2, lo16(L_G$non_lazy_ptr)(r2)
        addi r4, r4, 1
        lwz r2, 0(r2)
        add r2, r2, r3
        mullw r3, r2, r4
        blr

llvm-svn: 26716
 2006-03-12 00:38:57 +00:00
Chris Lattner
356183d91e rename priorityqueue -> availablequeue. When a node is scheduled, remember 
which cycle it lands on.

llvm-svn: 26714
 2006-03-11 22:44:37 +00:00
Chris Lattner
063086b0f4 Make CurrCycle a local var instead of an instance var 
llvm-svn: 26713
 2006-03-11 22:34:41 +00:00
Chris Lattner
9995a0c019 Move some methods around so that BU specific code is together, TD specific code 
is together, and direction independent code is together.

llvm-svn: 26712
 2006-03-11 22:28:35 +00:00
Chris Lattner
578d8fcb59 merge preds/chainpreds -> preds set 
merge succs/chainsuccs -> succs set

This has no functionality change, simplifies the code, and reduces the size
of sunits.

llvm-svn: 26711
 2006-03-11 22:24:20 +00:00
Evan Cheng
38280c0020 Added a parameter to control whether Constant::getStringValue() would chop 
off the result string at the first null terminator.

llvm-svn: 26704
 2006-03-10 23:52:03 +00:00
Chris Lattner
d3ef6c290a scrape out bits of llvm-db 
llvm-svn: 26701
 2006-03-10 22:48:19 +00:00
Chris Lattner
f918e15362 Move simple-selector-specific types to the simple selector. 
llvm-svn: 26693
 2006-03-10 07:51:18 +00:00
Chris Lattner
5255d04357 Simplify the interface to the schedulers, to not pass the selected heuristicin. 
llvm-svn: 26692
 2006-03-10 07:49:12 +00:00
Chris Lattner
a5b93b8c6d Move some simple-sched-specific instance vars to the simple scheduler. 
llvm-svn: 26690
 2006-03-10 07:42:02 +00:00
Chris Lattner
e015178de1 prune #includes 
llvm-svn: 26689
 2006-03-10 07:37:35 +00:00
Chris Lattner
4b70ff7876 move some simple scheduler methods into the simple scheduler 
llvm-svn: 26688
 2006-03-10 07:35:21 +00:00
Chris Lattner
dc2f135f5c Make EmitNode take a SDNode instead of a NodeInfo* 
llvm-svn: 26687
 2006-03-10 07:28:36 +00:00
Chris Lattner
b9d8fa0342 Move the VRBase field from NodeInfo to being a separate, explicit, map. 
llvm-svn: 26686
 2006-03-10 07:25:12 +00:00
Chris Lattner
c48cfba44b no need to build groups anymore 
llvm-svn: 26684
 2006-03-10 07:15:58 +00:00
Chris Lattner
6f82fe8106 Create SUnits directly from the SelectionDAG. 
llvm-svn: 26683
 2006-03-10 07:13:32 +00:00
Chris Lattner
2f8c7c3d55 Push PrepareNodeInfo/IdentifyGroups down the inheritance hierarchy 
llvm-svn: 26682
 2006-03-10 06:34:51 +00:00
Chris Lattner
349e9ddccc Teach the latency scheduler some new tricks. In particular, to break ties, 
keep track of a sense of "mobility", i.e. how many other nodes scheduling one
node will free up.  For something like this:

float testadd(float *X, float *Y, float *Z, float *W, float *V) {
  return (*X+*Y)*(*Z+*W)+*V;
}

For example, this makes us schedule *X then *Y, not *X then *Z.  The former
allows us to issue the add, the later only lets us issue other loads.

This turns the above code from this:

_testadd:
        lfs f0, 0(r3)
        lfs f1, 0(r6)
        lfs f2, 0(r4)
        lfs f3, 0(r5)
        fadds f0, f0, f2
        fadds f1, f3, f1
        lfs f2, 0(r7)
        fmadds f1, f0, f1, f2
        blr

into this:

_testadd:
        lfs f0, 0(r6)
        lfs f1, 0(r5)
        fadds f0, f1, f0
        lfs f1, 0(r4)
        lfs f2, 0(r3)
        fadds f1, f2, f1
        lfs f2, 0(r7)
        fmadds f1, f1, f0, f2
        blr

llvm-svn: 26680
 2006-03-10 05:51:05 +00:00
Chris Lattner
25e2556b71 add an aggregate method for reinserting scheduled nodes, add a callback for 
priority impls that want to be notified when a node is scheduled

llvm-svn: 26678
 2006-03-10 04:32:49 +00:00
Jeff Cohen
6ce97687f7 Fix VC++ build breakage. 
llvm-svn: 26676
 2006-03-10 03:57:45 +00:00
Chris Lattner
213209a248 remove dbg_declare, it's not used yet. 
llvm-svn: 26659
 2006-03-09 20:02:42 +00:00
Chris Lattner
f0fc6bbaf3 back out my previous hack 
llvm-svn: 26650
 2006-03-09 17:48:46 +00:00
Chris Lattner
c6c9e65301 remove temporary option 
llvm-svn: 26646
 2006-03-09 17:31:22 +00:00
Chris Lattner
c44be2c4ef temporary hack to get the build working again, apparently a header 
commit was forgotten

llvm-svn: 26642
 2006-03-09 17:11:08 +00:00
Jim Laskey
4b0e1d9e6c Move bit field endianness to backend. 
llvm-svn: 26639
 2006-03-09 13:28:47 +00:00
Chris Lattner
d17d77aa1d yes yes, enabled debug output is bad 
llvm-svn: 26637
 2006-03-09 07:39:25 +00:00
Chris Lattner
6398c13128 switch the t-d scheduler to use a really dumb and trivial critical path 
latency priority function.

llvm-svn: 26636
 2006-03-09 07:38:27 +00:00
Chris Lattner
d4130375c0 Pull latency information for target instructions out of the latency tables. :) 
Only enable this with -use-sched-latencies, I'll enable it by default with a
clean nightly tester run tonight.

PPC is the only target that provides latency info currently.

llvm-svn: 26634
 2006-03-09 07:15:18 +00:00
Chris Lattner
da6aafeef4 don't copy all itinerary data 
llvm-svn: 26633
 2006-03-09 07:13:00 +00:00
Chris Lattner
399bee27f0 PriorityQueue is an instance var, use it. 
llvm-svn: 26632
 2006-03-09 06:48:37 +00:00
Chris Lattner
9e95accf4e add some comments 
llvm-svn: 26631
 2006-03-09 06:37:29 +00:00
Chris Lattner
9df647539d Refactor the priority mechanism one step further: now that it is a separate 
class, sever its implementation from the interface.  Now we can provide new
implementations of the same interface (priority computation) without touching
the scheduler itself.

llvm-svn: 26630
 2006-03-09 06:35:14 +00:00
Jim Laskey
2698f0de7a Get rid of the multiple copies of getStringValue. Now a Constant:: method. 
llvm-svn: 26616
 2006-03-08 18:11:07 +00:00
Chris Lattner
fd22d42945 Split the priority function computation and priority queue management out 
of the ScheduleDAGList class into a new SchedulingPriorityQueue class.

llvm-svn: 26613
 2006-03-08 05:18:27 +00:00
Chris Lattner
42e2026cb0 switch from an explicitly managed list of SUnits to a simple vector of sunits 
llvm-svn: 26612
 2006-03-08 04:54:34 +00:00
Chris Lattner
12c6d89204 Shrinkify some fields, fit to 80 columns 
llvm-svn: 26611
 2006-03-08 04:41:06 +00:00
Chris Lattner
3fe975b846 revert the previous patch, didn't mean to check it in yet 
llvm-svn: 26610
 2006-03-08 04:39:05 +00:00
Chris Lattner
af5e26c980 remove "Slot", it is dead 
llvm-svn: 26609
 2006-03-08 04:37:58 +00:00
Chris Lattner
543832d39d Change the interface for getting a target HazardRecognizer to be more clean. 
llvm-svn: 26608
 2006-03-08 04:25:59 +00:00
Jim Laskey
2370265550 libstdc++-v3 was failing to build. Needed to handle composite types with empty 
members (running into a zero initializer.)

llvm-svn: 26607
 2006-03-08 02:07:02 +00:00
Jim Laskey
313570fb17 Use "llvm.metadata" section for debug globals. Filter out these globals in the 
asm printer.

llvm-svn: 26599
 2006-03-07 22:00:35 +00:00
Jim Laskey
69effa2325 Switch to using a numeric id for anchors. 
llvm-svn: 26598
 2006-03-07 20:53:47 +00:00
Jim Laskey
3bad199894 Bitfield support. 
llvm-svn: 26593
 2006-03-07 15:51:33 +00:00
Chris Lattner
0c801bd1cf Fix some formatting, when looking for hazards, prefer target nodes over 
things like copyfromreg.

llvm-svn: 26586
 2006-03-07 05:40:43 +00:00
Chris Lattner
01aa752a36 update file comment 
llvm-svn: 26573
 2006-03-06 17:58:04 +00:00
Evan Cheng
a00c61932d Remove some code that doesn't make sense 
llvm-svn: 26572
 2006-03-06 07:31:44 +00:00
Evan Cheng
c5c0658aa6 Remove SUnit::Priority1: it is re-calculated on demand as number of live 
range to be generated.

llvm-svn: 26570
 2006-03-06 06:08:54 +00:00
Chris Lattner
47639dbb93 Hoist the HazardRecognizer out of the ScheduleDAGList.cpp file to where 
targets can implement them.  Make the top-down scheduler non-g5-specific.

Remove the old testing hazard recognizer.

llvm-svn: 26569
 2006-03-06 00:22:00 +00:00