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27377 Commits

Author SHA1 Message Date
Nick Lewycky dc146a9fb9 Remove spurious case. EXTLOAD is not one of the node opcodes. 
llvm-svn: 31275
 2006-10-29 02:26:30 +00:00
Chris Lattner bba52191fa split critical edges more carefully and intelligently. In particular, critical 
edges whose destinations are not phi nodes don't bother us.  Also, share
split edges, since the split edge can't have a phi.  This significantly
reduces the complexity of generated code in some cases.

llvm-svn: 31274
 2006-10-28 19:22:10 +00:00
Chris Lattner c07657f59b Teach branch folding to fold identical jump tables together and to delete 
jump tables that are dead.

llvm-svn: 31273
 2006-10-28 18:34:47 +00:00
Chris Lattner 9233002334 add an assertion 
llvm-svn: 31272
 2006-10-28 18:21:51 +00:00
Chris Lattner ca84c3e441 remove dead method 
llvm-svn: 31271
 2006-10-28 18:21:29 +00:00
Chris Lattner 632232132a add a method for hacking on JTIdx's 
llvm-svn: 31270
 2006-10-28 18:18:36 +00:00
Chris Lattner cde339cf1e const'ify jump table stuff 
llvm-svn: 31269
 2006-10-28 18:17:09 +00:00
Chris Lattner 853b19a679 add a method for deleting dead jump tables. 
llvm-svn: 31268
 2006-10-28 18:12:00 +00:00
Chris Lattner 28328f9a0a add an assert 
llvm-svn: 31267
 2006-10-28 18:11:20 +00:00
Chris Lattner 28bfe389d1 don't print dead jump tables 
llvm-svn: 31266
 2006-10-28 18:10:06 +00:00
Chris Lattner a4a2157405 determine whether a change was made 
llvm-svn: 31265
 2006-10-28 18:00:05 +00:00
Chris Lattner 113f7470e6 implement the BlockHasNoFallThrough hook 
llvm-svn: 31264
 2006-10-28 17:35:02 +00:00
Chris Lattner af8383806b improve deletion of blocks that just contain branches by knowing that 
the pred block doesn't fall through into them if it's a jumptable.

llvm-svn: 31263
 2006-10-28 17:32:47 +00:00
Chris Lattner 53ebf20c26 add another target hook for branch folding. 
llvm-svn: 31262
 2006-10-28 17:29:57 +00:00
Jim Laskey eef273a16f Load and stores have not been uniqued properly. 
llvm-svn: 31261
 2006-10-28 17:25:28 +00:00
Chris Lattner 3e6b1c6157 Split *all* critical edges before isel. This resolves issues with spill code 
being inserted on unsplit critical edges, which introduces (sometimes large
amounts of) partially dead spill code.

This also fixes PR925 + CodeGen/Generic/switch-crit-edge-constant.ll

llvm-svn: 31260
 2006-10-28 17:04:37 +00:00
Chris Lattner 5217111abe new testcase 
llvm-svn: 31259
 2006-10-28 17:04:16 +00:00
Chris Lattner 3e763f5708 add option to isCriticalEdge 
llvm-svn: 31258
 2006-10-28 06:58:17 +00:00
Chris Lattner a6eb7e0803 break edges more intelligently 
llvm-svn: 31257
 2006-10-28 06:45:33 +00:00
Chris Lattner 80ea207bfa Expose a smarter way to break critical edges. 
llvm-svn: 31256
 2006-10-28 06:44:56 +00:00
Chris Lattner 400ac04e64 SplitCriticalEdge checks to see if an edge is critical, don't check twice 
llvm-svn: 31255
 2006-10-28 06:38:14 +00:00
Chris Lattner b78eb6c8d1 Fix a serious bug that caused any x86 vector stuff to infinite loop 
llvm-svn: 31254
 2006-10-28 06:15:26 +00:00
Evan Cheng ae8c29a7d3 Doh. Must check if GV is constant first before putting it in .cstring. 
llvm-svn: 31253
 2006-10-28 05:56:51 +00:00
Evan Cheng 0d782b4c60 Doh. Must check if GV is constant first. 
llvm-svn: 31252
 2006-10-28 05:56:06 +00:00
Nick Lewycky 1e075d9a40 Emitting raw bytecode is awfully rude. Add -disable-output. 
Clarify the test.

llvm-svn: 31251
 2006-10-28 02:34:41 +00:00
Jim Laskey 9ceb24bd5b Editorial clean up. 
llvm-svn: 31250
 2006-10-28 01:34:21 +00:00
Chris Lattner 23540b142c add a method 
llvm-svn: 31249
 2006-10-28 01:24:05 +00:00
Chris Lattner 5191c65485 prepare for a change I'm about to make 
llvm-svn: 31248
 2006-10-28 00:59:20 +00:00
Chris Lattner a6873c0f88 don't dist internal readme 
llvm-svn: 31247
 2006-10-28 00:51:15 +00:00
Chris Lattner acc6b37d0d don't dist internal readme's 
llvm-svn: 31246
 2006-10-28 00:49:54 +00:00
Chris Lattner 3be52bb570 don't distribute internal readme's 
llvm-svn: 31245
 2006-10-28 00:48:27 +00:00
Reid Spencer 247e09a07c Make sure all the readme files get distributed. 
llvm-svn: 31244
 2006-10-28 00:11:39 +00:00
Jim Laskey bd0f088743 Clean up. 
llvm-svn: 31243
 2006-10-27 23:52:51 +00:00
Chris Lattner 84a035056e Fix a bug in merged condition handling (CodeGen/Generic/2006-10-27-CondFolding.ll). 
Add many fewer CFG edges and PHI node entries.  If there is a switch which has
the same block as multiple destinations, only add that block once as a successor/phi
node (in the jumptable case)

llvm-svn: 31242
 2006-10-27 23:50:33 +00:00
Chris Lattner b722c1375e new testcase 
llvm-svn: 31241
 2006-10-27 23:47:34 +00:00
Jim Laskey f576b42bb2 Switch over from SelectionNodeCSEMap to FoldingSet. 
llvm-svn: 31240
 2006-10-27 23:46:08 +00:00
Devang Patel 2e13bf24c8 Use doc_code class. 
llvm-svn: 31239
 2006-10-27 23:06:27 +00:00
Jim Laskey c6b12bd2b1 Clean up 
llvm-svn: 31238
 2006-10-27 22:52:02 +00:00
Devang Patel 7e5af6808c Document removeModule(). 
llvm-svn: 31237
 2006-10-27 22:02:30 +00:00
Chris Lattner 28174f5a3a this doesn't occur any more in mason 
llvm-svn: 31236
 2006-10-27 22:02:19 +00:00
Chris Lattner 4c0cc53da1 the code in question is now: 
cmpw cr0, r7, r3
        ble cr0, LBB1_5 ;bb25
LBB1_8: ;bb17
        cmpw cr0, r8, r5
        bgt cr0, LBB1_2 ;bb

which is just as good as crnand.

llvm-svn: 31235
 2006-10-27 22:00:55 +00:00
Devang Patel 59085445e3 Document getAlignment() 
llvm-svn: 31234
 2006-10-27 21:58:31 +00:00
Chris Lattner b9392fb635 remove debug code 
llvm-svn: 31233
 2006-10-27 21:58:03 +00:00
Chris Lattner f1b54fd7a5 Codegen cond&cond with two branches. This compiles (f.e.) PowerPC/and-branch.ll to: 
cmpwi cr0, r4, 4
        bgt cr0, LBB1_2 ;UnifiedReturnBlock
LBB1_3: ;entry
        cmplwi cr0, r3, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

instead of:

        cmpwi cr7, r4, 4
        mfcr r2
        addic r4, r3, -1
        subfe r3, r4, r3
        rlwinm r2, r2, 30, 31, 31
        or r2, r2, r3
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock
LBB1_1: ;cond_true

llvm-svn: 31232
 2006-10-27 21:54:23 +00:00
Chris Lattner feaa76a3cc new testcase 
llvm-svn: 31231
 2006-10-27 21:52:39 +00:00
Chris Lattner ed0110b949 Turn conditions like x<Y|z==q into multiple blocks. 
This compiles Regression/CodeGen/X86/or-branch.ll into:

_foo:
        subl $12, %esp
        call L_bar$stub
        movl 20(%esp), %eax
        movl 16(%esp), %ecx
        cmpl $5, %eax
        jl LBB1_1       #cond_true
LBB1_3: #entry
        testl %ecx, %ecx
        jne LBB1_2      #UnifiedReturnBlock
LBB1_1: #cond_true
        call L_bar$stub
        addl $12, %esp
        ret
LBB1_2: #UnifiedReturnBlock
        addl $12, %esp
        ret

instead of:

_foo:
        subl $12, %esp
        call L_bar$stub
        movl 20(%esp), %eax
        movl 16(%esp), %ecx
        cmpl $4, %eax
        setg %al
        testl %ecx, %ecx
        setne %cl
        testb %cl, %al
        jne LBB1_2      #UnifiedReturnBlock
LBB1_1: #cond_true
        call L_bar$stub
        addl $12, %esp
        ret
LBB1_2: #UnifiedReturnBlock
        addl $12, %esp
        ret

And on ppc to:

        cmpwi cr0, r29, 5
        blt cr0, LBB1_1 ;cond_true
LBB1_3: ;entry
        cmplwi cr0, r30, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

instead of:

        cmpwi cr7, r4, 4
        mfcr r2
        addic r4, r3, -1
        subfe r30, r4, r3
        rlwinm r29, r2, 30, 31, 31
        and r2, r29, r30
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

llvm-svn: 31230
 2006-10-27 21:36:01 +00:00
Chris Lattner 4b19a4b203 new testcase 
llvm-svn: 31229
 2006-10-27 21:32:10 +00:00
Evan Cheng e056dd5928 Fixed a significant bug where unpcklpd is incorrectly used to extract element 1 from a v2f64 value. 
llvm-svn: 31228
 2006-10-27 21:08:32 +00:00
Evan Cheng 2252fb211a Add a new vextract test case. 
llvm-svn: 31227
 2006-10-27 21:05:18 +00:00
Bill Wendling ce3afd64e9 Forgot a } 
llvm-svn: 31226
 2006-10-27 20:22:04 +00:00