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27041 Commits

Author SHA1 Message Date
Evan Cheng 95f51a0871 Start checking from the root of the matched sub-tree. 
llvm-svn: 30957
 2006-10-14 08:30:53 +00:00
Evan Cheng cfb9526d61 When checking if a load can be folded, we check if there is any non-direct 
way to reach the load via any nodes that would be folded. Start from the
root of the matched sub-tree.

llvm-svn: 30956
 2006-10-14 08:30:15 +00:00
Chris Lattner 6a1b2de8c4 Make sure that the node returned by SimplifySetCC is added to the worklist 
so that it can be deleted if unused.

llvm-svn: 30955
 2006-10-14 03:52:46 +00:00
Chris Lattner d0cc3bdfc3 testcase for recent dag combiner patch. Before the entry bb was: 
_test:
        stwu r1, -80(r1)
        stw r1, 76(r1)
        mflr r11
        stw r11, 88(r1)
        rlwinm r2, r4, 0, 30, 31
        cmplwi cr7, r2, 2
        mfcr r2
        rlwinm r2, r2, 30, 31, 31
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

after it is:

_test:
        stwu r1, -80(r1)
        stw r1, 76(r1)
        mflr r11
        stw r11, 88(r1)
        rlwinm r2, r4, 0, 30, 31
        cmplwi cr0, r2, 2
        bgt cr0, LBB1_2 ;UnifiedReturnBlock

llvm-svn: 30954
 2006-10-14 03:40:02 +00:00
Chris Lattner 0626bd2fbc fold setcc of a setcc. 
llvm-svn: 30953
 2006-10-14 01:02:29 +00:00
Chris Lattner bd9acad805 When SimplifySetCC was moved to the DAGCombiner, it was never removed from 
SelectionDAG and it has since bitrotted.  Remove the copy from SelectionDAG.
Next, remove the constant folding piece of DAGCombiner::SimplifySetCC into
a new FoldSetCC method which can be used by getNode() and SimplifySetCC.

This fixes obscure bugs.

llvm-svn: 30952
 2006-10-14 00:41:01 +00:00
Chris Lattner 47db29a405 disable this pass for now, it's causing issues 
llvm-svn: 30951
 2006-10-14 00:30:06 +00:00
Chris Lattner 3218e0eed5 falling off the end of a function is ok with an unreachable instruction. 
llvm-svn: 30950
 2006-10-14 00:21:48 +00:00
Chris Lattner 52e298b700 testcase for recent selectiondag patch 
llvm-svn: 30949
 2006-10-13 23:54:16 +00:00
Jim Laskey dcf983ce41 Reduce the workload by not adding chain users to work list. 
llvm-svn: 30948
 2006-10-13 23:32:28 +00:00
Chris Lattner 45ffb1eb70 Fix a bug where we incorrectly turned '(X & 0) == 0' into '(X & 0) >> -1', 
which is undefined.  "0" isn't a power of 2.

llvm-svn: 30947
 2006-10-13 22:46:18 +00:00
Chris Lattner a47294ed7a implement branch inspection/modification methods. 
llvm-svn: 30946
 2006-10-13 21:21:17 +00:00
Evan Cheng ab51cf2e78 Merge ISD::TRUNCSTORE to ISD::STORE. Switch to using StoreSDNode. 
llvm-svn: 30945
 2006-10-13 21:14:26 +00:00
Chris Lattner df1ca3ff63 it is easier to implement these when they are virtual 
llvm-svn: 30944
 2006-10-13 21:02:27 +00:00
Chris Lattner 68b41e570e allow branch reversal to fail 
llvm-svn: 30943
 2006-10-13 20:59:31 +00:00
Bill Wendling a45a08a706 Corrected formatting. 
llvm-svn: 30942
 2006-10-13 20:53:50 +00:00
Chris Lattner 55ad08a59b add the branch folding pass as a late cleanup pass for all targets. For now 
it just deletes empty MBB's.  Soon it will do more :)

llvm-svn: 30941
 2006-10-13 20:45:56 +00:00
Chris Lattner 9516812316 replace the existing branch inspection/modification APIs with something more 
useful and general.

llvm-svn: 30940
 2006-10-13 20:44:01 +00:00
Chris Lattner 3e8e57c771 disable some objectionable code, maybe we can bring this pass to life 
llvm-svn: 30939
 2006-10-13 20:43:10 +00:00
Chris Lattner 63007919dc remove some dead code 
llvm-svn: 30938
 2006-10-13 20:40:42 +00:00
Chris Lattner be131662c3 add note 
llvm-svn: 30937
 2006-10-13 20:20:58 +00:00
Chris Lattner cf56917053 set isBarrier correctly 
llvm-svn: 30936
 2006-10-13 19:10:34 +00:00
Chris Lattner 4dc4f30a48 Correctly handle instruction separators. 
llvm-svn: 30935
 2006-10-13 17:56:02 +00:00
Chris Lattner 95129a7f22 Expose method and ivars for measuring inline asm length properly. 
llvm-svn: 30934
 2006-10-13 17:50:07 +00:00
Andrew Lenharth 966645e6b4 Move some warnings to debug mode. 
llvm-svn: 30933
 2006-10-13 17:38:22 +00:00
Rafael Espindola 5ab3166f74 add FNEGS and FNEGD 
llvm-svn: 30932
 2006-10-13 17:37:35 +00:00
Chris Lattner 057083f0e7 Fix another dtor issue. The function local statics in this function were 
being destroyed at inconvenient times.  Switch to using non-local ManagedStatic
objects, which actually also speeds up ConstRules::get.

llvm-svn: 30931
 2006-10-13 17:22:21 +00:00
Rafael Espindola d6050c3149 add SBCS and SUBS 
llvm-svn: 30930
 2006-10-13 17:19:20 +00:00
Rafael Espindola 79d9807c87 implement calls to functions that return long 
llvm-svn: 30929
 2006-10-13 16:47:22 +00:00
Rafael Espindola 3874a168d0 implement unordered floating point compares 
llvm-svn: 30928
 2006-10-13 13:14:59 +00:00
Jim Laskey ccee9baebe Workaround for templates 
llvm-svn: 30927
 2006-10-13 13:02:19 +00:00
Jim Laskey 13d3373e72 Clean up dump. 
llvm-svn: 30926
 2006-10-13 13:01:34 +00:00
Chris Lattner 5af1cbc5cf avoid a ctor/dtor issue with the ProgramName global. 
llvm-svn: 30925
 2006-10-13 00:06:24 +00:00
Chris Lattner 78d838186c simplify trivial function 
llvm-svn: 30924
 2006-10-12 23:50:28 +00:00
Evan Cheng 1d04dd3aac Really remove dead nodes from isel queue. 
llvm-svn: 30923
 2006-10-12 23:18:52 +00:00
Chris Lattner adb19d6e8f shrink anon-ns and mark stuff static. No functionality changes 
llvm-svn: 30922
 2006-10-12 22:09:17 +00:00
Chris Lattner 03fda13dbb add a note 
llvm-svn: 30921
 2006-10-12 22:01:26 +00:00
Chris Lattner d0620d2773 Lower X%C into X/C+stuff. This allows the 'division by a constant' logic to 
apply to rems as well as divs.  This fixes PR945 and speeds up ReedSolomon
from 14.57s to 10.90s (which is now faster than gcc).

It compiles CodeGen/X86/rem.ll into:

_test1:
        subl $4, %esp
        movl %esi, (%esp)
        movl $2155905153, %ecx
        movl 8(%esp), %esi
        movl %esi, %eax
        imull %ecx
        addl %esi, %edx
        movl %edx, %eax
        shrl $31, %eax
        sarl $7, %edx
        addl %eax, %edx
        imull $255, %edx, %eax
        subl %eax, %esi
        movl %esi, %eax
        movl (%esp), %esi
        addl $4, %esp
        ret
_test2:
        movl 4(%esp), %eax
        movl %eax, %ecx
        sarl $31, %ecx
        shrl $24, %ecx
        addl %eax, %ecx
        andl $4294967040, %ecx
        subl %ecx, %eax
        ret
_test3:
        subl $4, %esp
        movl %esi, (%esp)
        movl $2155905153, %ecx
        movl 8(%esp), %esi
        movl %esi, %eax
        mull %ecx
        shrl $7, %edx
        imull $255, %edx, %eax
        subl %eax, %esi
        movl %esi, %eax
        movl (%esp), %esi
        addl $4, %esp
        ret

instead of div/idiv instructions.

llvm-svn: 30920
 2006-10-12 20:58:32 +00:00
Chris Lattner ce34aa8fd7 new testcase 
llvm-svn: 30919
 2006-10-12 20:56:15 +00:00
Evan Cheng 88bf1625fa Add another cyclic dag test case. 
llvm-svn: 30918
 2006-10-12 20:38:45 +00:00
Evan Cheng 8e770f5589 Use RemoveDeadNode to kill dead node. 
llvm-svn: 30917
 2006-10-12 20:35:19 +00:00
Evan Cheng a731cb674a Add RemoveDeadNode to remove a dead node and its (potentially) dead operands. 
llvm-svn: 30916
 2006-10-12 20:34:05 +00:00
Chris Lattner 2e33fb453b add a minor dag combine noticed when looking at PR945 
llvm-svn: 30915
 2006-10-12 20:23:19 +00:00
Evan Cheng a7956d2894 Doh. This wasn't causing problems by luck. 
llvm-svn: 30914
 2006-10-12 19:13:59 +00:00
Evan Cheng 694810c227 Some X86ISD::CMP were created with wrong ValueType's. 
llvm-svn: 30913
 2006-10-12 19:12:56 +00:00
Chris Lattner f9e946b175 Fix massive resource leaks in the bytecode reader. Reading a bytecode file 
with ParseBytecodeFile used to leak both a ModuleProvider (and related
bytecode parser stuff attached to it) AND a file descriptor, which was
never closed.  This prevented gccld/llvm-ld/llvm-link from linking together
apps with more that ~252 .bc files on darwin.

llvm-svn: 30912
 2006-10-12 18:32:30 +00:00
Chris Lattner 8c9422c4b8 mark call adjustments as modifying the SP 
llvm-svn: 30911
 2006-10-12 18:00:26 +00:00
Chris Lattner 0e0ee36f45 adjcallstack up/down clobbers the sp 
llvm-svn: 30910
 2006-10-12 18:00:14 +00:00
Chris Lattner d376e9f4ac adjcallstackup/down clobbers the stack pointer 
llvm-svn: 30909
 2006-10-12 17:57:58 +00:00
Chris Lattner 7374bc0577 mark adjcallstack up/down as clobbering and using the SP 
llvm-svn: 30908
 2006-10-12 17:56:34 +00:00