RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-02-15 09:51:00 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
20,276 Commits 6 Branches 6 Tags
Commit Graph

20276 Commits

This Branch
This Branch
All Branches
Author SHA1 Message Date
Chris Lattner
be6f88a2e8 Make IVUseShouldUsePostIncValue more aggressive when the use is a PHI. In 
particular, it should realize that phi's use their values in the pred block
not the phi block itself.  This change turns our em3d loop from this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_6    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; endif.loopexit.loopexit_crit_edge
        addi r3, r2, 1
        blr
LBB_test_6:     ; loopexit
        or r3, r2, r2
        blr

into:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r6, r6
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        or r2, r6, r6
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r2, r2
        blr


Unfortunately, this is actually worse code, because the register coallescer
is getting confused somehow.  If it were doing its job right, it could turn the
code into this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r6, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r6, r6
        blr

... which I'll work on next. :)

llvm-svn: 23604
 2005-10-03 02:50:05 +00:00
Chris Lattner
6a5ace34da Refactor some code into a function 
llvm-svn: 23603
 2005-10-03 01:04:44 +00:00
Chris Lattner
5a865c8598 This break is bogus and I have no idea why it was there. Basically it prevents 
memoizing code when IV's are used by phinodes outside of loops.  In a simple
example, we were getting this code before (note that r6 and r7 are isomorphic
IV's):

        li r6, 0
        or r7, r6, r6
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r7, r7
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r2, r7, 1
        addi r7, r7, 1
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

Now we get:

        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

this was noticed in em3d.

llvm-svn: 23602
 2005-10-03 00:37:33 +00:00
Chris Lattner
af938ddbe5 when checking if we should move a split edge block outside of a loop, 
check the presplit pred, not the post-split pred.  This was causing us
to make the wrong decision in some cases, leaving the critical edge block
in the loop.

llvm-svn: 23601
 2005-10-03 00:31:52 +00:00
Chris Lattner
3a47224042 This member can be const too 
llvm-svn: 23600
 2005-10-03 00:21:25 +00:00
Chris Lattner
187d775d80 put the right labels on the data 
llvm-svn: 23599
 2005-10-02 21:51:38 +00:00
Chris Lattner
70b5f4e3fd Fix a problem where the legalizer would run out of stack space on extremely 
large basic blocks because it was purely recursive.  This switches it to an
iterative/recursive hybrid.

llvm-svn: 23596
 2005-10-02 17:49:46 +00:00
Chris Lattner
52952a665d silence a bogus warning 
llvm-svn: 23595
 2005-10-02 16:30:51 +00:00
Chris Lattner
462fe8b2cc silence some warnings 
llvm-svn: 23594
 2005-10-02 16:29:36 +00:00
Chris Lattner
51aeb8156a silence a warning 
llvm-svn: 23593
 2005-10-02 16:27:59 +00:00
Chris Lattner
d4313f30ea add patterns for float binops and fma ops 
llvm-svn: 23592
 2005-10-02 07:46:28 +00:00
Chris Lattner
efd92cf886 Sort the cpu and features table, so that the alpha backend doesn't fail EVERY 
compile with an assertion that the tables are not sorted!

llvm-svn: 23591
 2005-10-02 07:13:52 +00:00
Chris Lattner
aa1a841fc7 Add assertions to the trivial scheduler to check that the value types match 
up between defs and uses.

llvm-svn: 23590
 2005-10-02 07:10:55 +00:00
Chris Lattner
00a39b4fd5 another solution to the fsel issue. Instead of having 4 variants, just force 
the comparison to be 64-bits.  This is fine because extensions from float
to double are free.

llvm-svn: 23589
 2005-10-02 07:07:49 +00:00
Chris Lattner
efc0d24037 fsel can take a different FP type for the comparison and for the result. As such 
split the FSEL family into 4 things instead of just two.

llvm-svn: 23588
 2005-10-02 06:58:23 +00:00
Chris Lattner
f1c1042780 fix an f32/f64 type mismatch 
llvm-svn: 23587
 2005-10-02 06:37:13 +00:00
Chris Lattner
2b189d4f9e Codegen CopyFromReg using the regclass that matches the valuetype of the 
destination vreg.

llvm-svn: 23586
 2005-10-02 06:34:16 +00:00
Chris Lattner
89c435541a Adjust to change in ctor 
llvm-svn: 23585
 2005-10-02 06:23:51 +00:00
Chris Lattner
cccadf388c Emit the value type for each register class. 
llvm-svn: 23584
 2005-10-02 06:23:37 +00:00
Chris Lattner
b19d4e5584 Expose the actual valuetype of each register class 
llvm-svn: 23583
 2005-10-02 06:23:19 +00:00
Chris Lattner
b66cf00015 Minor tweak to the branch selector. When emitting a two-way branch, and if 
we're in a single-mbb loop, make sure to emit the backwards branch as the
conditional branch instead of the uncond branch.  For example, emit this:

LBBl29_z__44:
        stw r9, 0(r15)
        stw r9, 4(r15)
        stw r9, 8(r15)
        stw r9, 12(r15)
        addi r15, r15, 16
        addi r8, r8, 1
        cmpw cr0, r8, r28
        ble cr0, LBBl29_z__44
        b LBBl29_z__48                   *** NOT PART OF LOOP

Instead of:

LBBl29_z__44:
        stw r9, 0(r15)
        stw r9, 4(r15)
        stw r9, 8(r15)
        stw r9, 12(r15)
        addi r15, r15, 16
        addi r8, r8, 1
        cmpw cr0, r8, r28
        bgt cr0, LBBl29_z__48            *** PART OF LOOP!
        b LBBl29_z__44

The former sequence has one fewer dispatch group for the loop body.

llvm-svn: 23582
 2005-10-01 23:06:26 +00:00
Chris Lattner
f26486ee16 like the comment says, enable this 
llvm-svn: 23581
 2005-10-01 23:02:40 +00:00
Chris Lattner
37fdc6dbf9 Add some very paranoid checking for operand/result reg class matchup 
For instructions that define multiple results, use the right regclass
to define the result, not always the rc of result #0

llvm-svn: 23580
 2005-10-01 07:45:09 +00:00
Jeff Cohen
412582bcec Fix VC++ warnings. 
llvm-svn: 23579
 2005-10-01 03:57:14 +00:00
Chris Lattner
2f63a0f7c6 fix typo 
llvm-svn: 23578
 2005-10-01 02:51:36 +00:00
Chris Lattner
50411b1026 Modify the ppc backend to use two register classes for FP: F8RC and F4RC. 
These are used to represent float and double values, and the two regclasses
contain the same physical registers.

llvm-svn: 23577
 2005-10-01 01:35:02 +00:00
Chris Lattner
9c069d09a5 Annotate nodes with their addresses if a graph requests it. 
This is Jim's feature implemented so that graphs could 'opt-in' and get
this behavior.  This is currently used by selection dags.

llvm-svn: 23576
 2005-10-01 00:19:21 +00:00
Chris Lattner
2a439615b7 add a method 
llvm-svn: 23575
 2005-10-01 00:17:07 +00:00
Jim Laskey
532fc48d3d typo 
llvm-svn: 23574
 2005-10-01 00:08:23 +00:00
Jim Laskey
809ab88d91 1. Simplify the gathering of node groups. 
2. Printing node groups when displaying nodes.

llvm-svn: 23573
 2005-10-01 00:03:07 +00:00
Jim Laskey
94e6b5c648 Should be using flag and not chain. 
llvm-svn: 23572
 2005-09-30 23:43:37 +00:00
Nate Begeman
62fa04cd5b Remove some now-dead code. 
llvm-svn: 23571
 2005-09-30 21:28:27 +00:00
Andrew Lenharth
73913b88bb more specific tests of subtarget stuff 
llvm-svn: 23570
 2005-09-30 20:30:24 +00:00
Andrew Lenharth
901ca061fd subtarget support for CIX and FIX extentions (the only 2 I care about right now) 
llvm-svn: 23569
 2005-09-30 20:24:38 +00:00
Jim Laskey
7dcadb97aa Reverting change moving to selection dag graph. 
llvm-svn: 23568
 2005-09-30 19:33:41 +00:00
Jim Laskey
1c928ba21a Added allnodes_size for scheduling support. 
llvm-svn: 23567
 2005-09-30 19:27:01 +00:00
Jim Laskey
5e51979f90 1. Made things node-centric (from operand). 
2. Added node groups to handle flagged nodes.

3. Started weaning simple scheduling off existing emitter.

llvm-svn: 23566
 2005-09-30 19:15:27 +00:00
Jim Laskey
35efa80550 Add the node name (thus the address) to node label. 
llvm-svn: 23565
 2005-09-30 19:11:53 +00:00
Chris Lattner
c744d9398f Rename MRegisterDesc -> TargetRegisterDesc for consistency 
llvm-svn: 23564
 2005-09-30 17:49:27 +00:00
Chris Lattner
f90f3abcef Update the discussion of TargetRegisterDesc 
llvm-svn: 23563
 2005-09-30 17:46:55 +00:00
Chris Lattner
f29abb6f4a remove some more initializers 
llvm-svn: 23562
 2005-09-30 17:41:05 +00:00
Chris Lattner
661384dce6 trim down the target info structs now that we have a preferred spill register class for each callee save register 
Why is V9 maintaining these tables manually? ugh!

llvm-svn: 23561
 2005-09-30 17:38:36 +00:00
Chris Lattner
6124aae803 trim down the target info structs now that we have a preferred spill register class for each callee save register 
llvm-svn: 23560
 2005-09-30 17:35:22 +00:00
Chris Lattner
3fcb5aa250 now that we have a reg class to spill with, get this info from the regclass 
llvm-svn: 23559
 2005-09-30 17:19:22 +00:00
Chris Lattner
c3c139cc70 constant fold these calls 
llvm-svn: 23558
 2005-09-30 17:16:59 +00:00
Chris Lattner
f70bf81bb6 simplify this code using the new regclass info passed in 
llvm-svn: 23557
 2005-09-30 17:12:38 +00:00
Chris Lattner
738631f389 Now that we have getCalleeSaveRegClasses() info, use it to pass the register 
class into the spill/reload methods.  Targets can now rely on that argument.

llvm-svn: 23556
 2005-09-30 16:59:07 +00:00
Chris Lattner
18454e037b expose a new virtual method 
llvm-svn: 23555
 2005-09-30 07:06:37 +00:00
Chris Lattner
8e4d17179d stub out a virtual method 
llvm-svn: 23554
 2005-09-30 06:55:18 +00:00
Chris Lattner
2da37b0d74 Compute a preferred spill register class for each callee-save register 
llvm-svn: 23553
 2005-09-30 06:44:45 +00:00