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49 Commits

Author SHA1 Message Date
Dale Johannesen
66a2a8f878 ARM: make branch folder remove unconditional branches 
following jump tables that it earlier inserted.  This
would be OK on other targets but is needed for correctness
only on ARM (constant islands needs to find jump tables).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39782 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 16:45:35 +00:00
Dale Johannesen
5d9c4b6020 Fix hang compiling TimberWolf (allow for islands 
of size other than 4).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39743 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 18:32:38 +00:00
Evan Cheng
8202010364 Didn't mean the last commit. Revert. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38515 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 22:00:16 +00:00
Evan Cheng
c608ff22e7 Update. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38513 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 21:49:47 +00:00
Evan Cheng
0e1d37904a Reflects the chanegs made to PredicateOperand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37898 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-05 07:18:20 +00:00
Evan Cheng
2706f9771d Fix comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37098 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-16 05:14:06 +00:00
Evan Cheng
44bec52b1b Add PredicateOperand to all ARM instructions that have the condition field. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37066 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-15 01:29:07 +00:00
Devang Patel
1997473cf7 Drop 'const' 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-03 01:11:54 +00:00
Devang Patel
3e15bf33e0 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-02 21:39:20 +00:00
Devang Patel
794fd75c67 Do not use typeinfo to identify pass in pass manager. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-01 21:15:47 +00:00
Dale Johannesen
8593e41855 Rewrite of Thumb constant islands handling (exact allowance for padding 
around islands and jump tables).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36573 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-29 19:19:30 +00:00
Evan Cheng
185ea1e2aa Doh. ARM::LEApcrel is a single instruction MI. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36513 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-27 18:27:13 +00:00
Evan Cheng
768c9f725b Special handling of LEApcrel and tLEApcrel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36504 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-27 08:14:15 +00:00
Dale Johannesen
56c42ef3e4 Make Thumb funcs containing islands 4-byte aligned. Fix bugs maintaining 
BBOffsets and BBSizes when adjusting conditional branches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36372 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-23 20:09:04 +00:00
Evan Cheng
ed884f3a2f Remove unused constant pool entries. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35635 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 23:39:48 +00:00
Dale Johannesen
d959aa421a fix off by 1 error in displacement computation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35602 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 20:31:06 +00:00
Evan Cheng
f49407b790 - Track which callee-saved registers are spilled. 
- Some code clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34783 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-01 08:26:31 +00:00
Dale Johannesen
b71aa2b6ca Changes requested in review of last pass. Also pulled isThumb into a 
member, instead of resetting in every function that uses it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34764 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-28 23:20:38 +00:00
Dale Johannesen
f1b214d3ca Add intelligence about where to break large blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34755 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-28 18:41:23 +00:00
Dale Johannesen
ce74de46dd cosmetic changes from review of last patch. obvious 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34598 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-25 18:31:31 +00:00
Dale Johannesen
598270a68d remove crediting of Evan Cheng and me. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34568 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-25 01:42:36 +00:00
Dale Johannesen
99c49a4b94 Removed WaterListOffset, inserted BBOffsets. Remove TODO item about this 
from README.
When no water available, use end of block if in range.  (More to do here.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34563 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-25 00:47:03 +00:00
Dale Johannesen
88e37ae366 rewrite of constant islands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34523 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-23 05:02:36 +00:00
Evan Cheng
e03cff6812 These vectors are frequently large. Use std::vector instead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34109 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-09 23:59:14 +00:00
Evan Cheng
c99ef085b9 Add reference counting to constantpool entries. Delete the unused ones. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34105 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-09 20:54:44 +00:00
Evan Cheng
bd5d3dbdbe - Branch max. displacement calculation bug. 
- Add debugging info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33811 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-03 02:08:34 +00:00
Evan Cheng
05cc424082 Use MBB.empty() instead of MBB.size() for speed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33789 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-02 19:09:19 +00:00
Evan Cheng
1dd6a606ad Watch out for empty BB. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33788 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-02 18:49:02 +00:00
Evan Cheng
556f33c6e2 Pasto. Lots of it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33762 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-01 20:44:52 +00:00
Evan Cheng
b43216ee4a - Off by one bugs in maximum displacement calculation / testing. 
- In thumb mode, a new constpool island BB size should be 4 + 2 to
  compensate for the potential padding due to alignment requirement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33753 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-01 10:16:15 +00:00
Evan Cheng
2021abe154 Pessmistically assume the .align 2 before the first constpool entry adds 
two bytes padding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33734 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-01 01:09:47 +00:00
Evan Cheng
a2e35588c6 Handle an interesting corner case: the constpool_entry being reference is two 
instructions away, i.e. its address is equal to PC.
        %r0 = tLDRpci <cp#0>
        bx
        CONSTPOOL_ENTRY 0 <cp#0>, 4


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33728 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-31 23:35:18 +00:00
Evan Cheng
c0dbec7e10 When determining whether a pc relative branch / load displacement fits in the 
instruction field, adjust it for PC value (4 for thumb, 8 for arm).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33711 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-31 19:57:44 +00:00
Evan Cheng
a9b8b8d62c Some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33707 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-31 18:29:27 +00:00
Evan Cheng
934536dab2 ConstPool island bug: watch out for cases where UserMI is the last MI of the BB. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33706 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-31 18:19:07 +00:00
Evan Cheng
0c61584d05 - Added Thumb constpool island support. 
- Islands are inserted right after the user MI since thumb LDR cannot encode
  negative offset.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33690 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-31 02:22:22 +00:00
Evan Cheng
d1b2c1e88f - In thumb mode, if size of MachineFunction is >= 2048, force LR to be 
spilled (if it is not already).
- If LR is spilled, use BL to implement far jumps. LR is not used as a GPR
  in thumb mode so it can be clobbered if it is properly spilled / restored
  in prologue / epilogue.
- If LR is force spilled but no far jump has been emitted, try undo'ing the
  spill by:
  push lr -> delete
  pop pc -> bx lr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33650 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-30 01:18:38 +00:00
Evan Cheng
29836c330f Factor GetInstSize() out of constpool island pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33644 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-29 23:45:17 +00:00
Evan Cheng
d85ac4d079 Thumb jumptable support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33568 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 02:29:45 +00:00
Evan Cheng
43aeab68a6 Conditional branch being fixed up is not the last MI in the BB, there is a 
unconditional branch following it. Simply invert the condition and swap
destinations if the conditional branch can reach the destination of the
unconditional branch:
beq L1
b   L2
=>
bne L2
b   L1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33548 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-26 20:38:26 +00:00
Jim Laskey
1ee2925742 Make LABEL a builtin opcode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33537 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-26 14:34:52 +00:00
Evan Cheng
dd353b8ad7 SplitBlockBeforeInstr() insert a unconditional branch to the next BB. This 
is unnecessary when we are fixing up a conditional branch since we will be
adding a unconditional branch to the destination of the original branch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33517 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-26 02:02:39 +00:00
Evan Cheng
7755facd76 Need to scan the function for branches even if there aren't any constants. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33515 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-26 01:04:44 +00:00
Evan Cheng
a0bf794eb6 Forgot to update this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33512 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-25 23:31:04 +00:00
Evan Cheng
c285414988 Add comment, fix typo, reduce memory usage, etc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33510 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-25 23:18:59 +00:00
Evan Cheng
743fa032a7 Doh. Skip JT branches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33501 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-25 19:43:52 +00:00
Evan Cheng
af5cbcb809 Added (preliminary) branch shortening capability to constantpool island pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33497 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-25 03:12:46 +00:00
Evan Cheng
012f2d97b7 Use PC relative ldr to load from a constantpool in Thumb mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33484 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-24 08:53:17 +00:00
Evan Cheng
a8e2989ece ARM backend contribution from Apple. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33353 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-19 07:51:42 +00:00