Commit Graph

297 Commits

Author SHA1 Message Date
Evan Cheng
40984d7449 foldMemoryOperand() cannot fold tMOVrr sp into load / store in thumb mode. tLDRspi / tSTRspi cannot target / store high registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33958 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-06 06:13:29 +00:00
Evan Cheng
88b633165a eliminateFrameIndex() bug when frame pointer is used as base register.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33945 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-06 00:23:31 +00:00
Evan Cheng
ad0e465889 - Store val, [sp, c] must be selected to tSTRsp.
- If c does not fit in the offset field, materialize sp + c into a register
  using tADDhirr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33944 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-06 00:22:06 +00:00
Evan Cheng
b38cba928e ARM callseq_end should have a input flag operand so it would be scheduled right after the call.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33832 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-03 09:11:58 +00:00
Evan Cheng
fc4034259f Fix comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33831 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-03 08:53:01 +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
Lauro Ramos Venancio
4642ca6589 bugfix: SP isn't resetted when function has FP and there is no spills.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33800 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-02 23:08:40 +00:00
Evan Cheng
a21335dd76 Another thumb large stack offset codegen bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33795 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-02 21:08:39 +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
f48ae3353e Ugh. Only meant to do this in thumb mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33780 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-02 08:58:48 +00:00
Chris Lattner
2d1222c060 add a note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33778 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-02 04:36:46 +00:00
Evan Cheng
9a2ef9509e Fix a bug in getARMCMP (which translate CondCode to ARM specific CC) when the RHS is a constant.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33775 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-02 01:53:26 +00:00
Evan Cheng
b0636156ef Thumb does not have clz.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33773 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 23:34:03 +00:00
Lauro Ramos Venancio
c33f674ca3 Define PrivateGlobalPrefix for ARM Linux. (Fix CodeGen/ARM/large_stack.ll)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33763 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 21:43:53 +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
Lauro Ramos Venancio
6f46e59d2a Fix .thumb_func directive on linux.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33759 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 18:25:34 +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
e0c2b6b9a8 .set pc relative displacement bug: label should be moved down one instruction
to just before the add r1, pc:

Before:
        .set PCRELV0, (LJTI1_0_0-(LPCRELL0+4))
LPCRELL0:
        mov r1, #PCRELV0
        add r1, pc

Now:
        .set PCRELV0, (LJTI1_0_0-(LPCRELL0+4))
        mov r1, #PCRELV0
LPCRELL0:
        add r1, pc


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33744 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 03:04:49 +00:00
Evan Cheng
736cefff85 Add a note.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33743 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 02:46:20 +00:00
Evan Cheng
9312313a56 Also set alignment of stack-based structs to 4 in thumb mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33741 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 02:18:36 +00:00
Evan Cheng
9d945f78e5 Special epilogue for vararg functions. We cannot do a pop to pc because
there follows a sp increment for the va register save region. Instead issue
a separate pop to another register, increment sp, and then return:
        pop {r4, r5, r6, r7}
        pop {r3}
        add sp, #3 * 4
        bx r3


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33739 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 01:49:46 +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
5b49ab9996 Possible JT improvements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33733 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 01:07:48 +00:00
Evan Cheng
3bf12d0460 Don't emit unnecessary .align directive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33729 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 23:39:39 +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
7588ad478a Don't want to add FramePtr to callee save spill list twice.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33727 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 23:17:29 +00:00
Evan Cheng
3548006a29 Darwin ABI requires FP to point to stack slot of prev FP.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33724 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 22:25:33 +00:00
Evan Cheng
11a065e599 Add entry.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33723 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 22:11:38 +00:00
Evan Cheng
0fa10515ee Thumb add sp, #imm requires the immediate value be multiple of 4. For now,
change preferred alignment of short, byte, bool to 4.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33722 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 22:08:40 +00:00
Evan Cheng
86eb515359 Update comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33721 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 22:06:44 +00:00
Evan Cheng
3471b60e95 Thumb asm syntax does not want 's' suffix for flag setting opcodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33717 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 20:12:31 +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
Lauro Ramos Venancio
b5b84f92bf ARM fix: Miscompilation when frame pointer can't be eliminated. Uninitialized frame pointer register is used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33703 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 13:12:46 +00:00
Evan Cheng
193f850880 Specify the right CC for comparison libcalls.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33702 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 09:30:58 +00:00
Evan Cheng
b6ab2547cb Observe -soft-float.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33699 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31 08:40:13 +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
36640905e1 During PEI, if the immediate value of sp + offset is too large (i.e. something
that would require > 3 instructions to materialize), load the immediate from a
constpool entry.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33667 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 23:01:46 +00:00
Evan Cheng
c60e76d139 - Fix codegen for pc relative constant (e.g. JT) in thumb mode:
.set PCRELV0, (LJTI1_0_0-(LPCRELL0+4))
LPCRELL0:
        add r1, pc, #PCRELV0
This is not legal since add r1, pc, #c requires the constant be a multiple of 4.
Do the following instead:
        .set PCRELV0, (LJTI1_0_0-(LPCRELL0+4))
LPCRELL0:
        mov r1, #PCRELV0
        add r1, pc

- In thumb mode, it's not possible to use .set generate a pc relative stub
  address. The stub is ARM code which is in a different section from the thumb
  code. Load the value from a constpool instead.
- Some asm printing clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33664 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 20:37:08 +00:00
Reid Spencer
5cbf985dcb For PR1136: Rename GlobalVariable::isExternal as isDeclaration to avoid
confusion with external linkage types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33663 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 20:08:39 +00:00
Evan Cheng
ad1b9a503c Copy and paste bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33658 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 08:22:33 +00:00
Evan Cheng
b267ca17d1 Darwin -static should codegen static ctors / dtors to .constructor / .destructor sections.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33657 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 08:04:53 +00:00
Evan Cheng
c322a9ac14 Misseed thumb jumptable branch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33656 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 08:03:06 +00:00
Evan Cheng
236f677e48 In thumb mode, round up stack frame size to multiple of 4 since add/sub
sp, imm instructions implicitly multiply the offset by 4.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33653 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 02:57:02 +00:00
Evan Cheng
5b91c7f69a Thumb eliminateFrameIndex fixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 02:36:01 +00:00
Evan Cheng
cea117d2de Change the operand orders to t_addrmode_s* to make it easier to morph
instructions that use these address modes to instructions that use
t_addrmode_sp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33651 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 02:35:32 +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
225dfe973b Use BL to implement Thumb far jumps.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33649 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-30 01:13:37 +00:00