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27205 Commits

Author SHA1 Message Date
Evan Cheng 0d41d19427 All targets expand BR_JT for now. 
llvm-svn: 31294
 2006-10-30 08:02:39 +00:00
Evan Cheng 84a28d4e76 Lower jumptable to BR_JT. The legalizer can lower it to a BRIND or let the target custom lower it. 
llvm-svn: 31293
 2006-10-30 08:00:44 +00:00
Evan Cheng c3e695137d Added a new SDNode type: BR_JT for jumptable branch. 
llvm-svn: 31292
 2006-10-30 07:59:36 +00:00
Chris Lattner cf8dc24305 fix this regtest 
llvm-svn: 31291
 2006-10-30 05:24:03 +00:00
Chris Lattner 725b8637e3 add a new form of insert. 
llvm-svn: 31290
 2006-10-30 05:07:51 +00:00
Chris Lattner 15fffeedca Add SmallString a (currently) minimal class that adapts SmallVector to be 
more string-like.

llvm-svn: 31289
 2006-10-30 03:39:20 +00:00
Chris Lattner 2716c6f8d8 add a method 
llvm-svn: 31288
 2006-10-30 03:14:15 +00:00
Chris Lattner ba1d30424f add newline at end of file 
llvm-svn: 31287
 2006-10-29 23:47:01 +00:00
Chris Lattner 149e666baf add a highly efficient hash table that is specialized for mapping C strings 
to some other type.

llvm-svn: 31286
 2006-10-29 23:42:03 +00:00
Chris Lattner b9de90377f Add a new llvm::Allocator abstraction, which will be used by a container 
I'm about to add.  This is similar to, but necessarily different than, the
STL allocator class.

llvm-svn: 31285
 2006-10-29 22:08:03 +00:00
Chris Lattner fc519cd2d1 Fix SimplifyCFG/2006-10-29-InvokeCrash.ll, a crash compiling QT. 
llvm-svn: 31284
 2006-10-29 21:21:20 +00:00
Chris Lattner 4d377fec3b new testcase 
llvm-svn: 31283
 2006-10-29 21:20:56 +00:00
Chris Lattner 504eeda365 Make CanFallThrough more intelligent (so it can handle blocks with (e.g.) no 
successors), and make island block movement more general.

This compiles CodeGen/X86/2006-04-27-ISelFoldingBug.ll to:

_loadAndRLEsource_no_exit_2E_1_label_2E_0:
        subl $8, %esp
        movl %esi, 4(%esp)
        movl %ebx, (%esp)
        movl 16(%esp), %eax
        movl 12(%esp), %ecx
LBB1_3: #label.0
        movl _last, %edx
        movl %edx, %esi
        incl %esi
        movl %esi, _last
        movl %ecx, %ebx
        # TRUNCATE movb %bl, %bl
        movl _block, %esi
        movb %bl, 1(%esi,%edx)
        cmpl %eax, _last
        jge LBB1_2      #codeRepl5.exitStub
LBB1_4: #label.0
        cmpl $257, %ecx
        je LBB1_2       #codeRepl5.exitStub
LBB1_1: #label.0.no_exit.1_crit_edge.exitStub
        movl $1, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret
LBB1_2: #codeRepl5.exitStub
        xorl %eax, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret

instead of:

_loadAndRLEsource_no_exit_2E_1_label_2E_0:
        subl $8, %esp
        movl %esi, 4(%esp)
        movl %ebx, (%esp)
        movl 16(%esp), %eax
        movl 12(%esp), %ecx
        jmp LBB1_3      #label.0
LBB1_1: #label.0.no_exit.1_crit_edge.exitStub
        movl $1, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret
LBB1_2: #codeRepl5.exitStub
        xorl %eax, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret
LBB1_3: #label.0
        movl _last, %edx
        movl %edx, %esi
        incl %esi
        movl %esi, _last
        movl %ecx, %ebx
        # TRUNCATE movb %bl, %bl
        movl _block, %esi
        movb %bl, 1(%esi,%edx)
        cmpl %eax, _last
        jge LBB1_2      #codeRepl5.exitStub
LBB1_4: #label.0
        cmpl $257, %ecx
        jne LBB1_1      #label.0.no_exit.1_crit_edge.exitStub
        jmp LBB1_2      #codeRepl5.exitStub

... which is much better layout :)

llvm-svn: 31282
 2006-10-29 21:05:41 +00:00
Chris Lattner e60ae823e8 fix Generic/2006-10-29-Crash.ll 
llvm-svn: 31281
 2006-10-29 21:01:20 +00:00
Chris Lattner 6f3c76384d new testcase 
llvm-svn: 31280
 2006-10-29 21:00:55 +00:00
Chris Lattner f31b9ef458 Fix a load folding issue that Evan noticed: there is no need to export values 
used by comparisons in the main block.

llvm-svn: 31279
 2006-10-29 18:23:37 +00:00
Jim Laskey 179ebd3fc3 Try again. 
llvm-svn: 31278
 2006-10-29 09:19:59 +00:00
Jim Laskey 8f05a611e9 Not handling zero length strings. 
llvm-svn: 31277
 2006-10-29 08:27:07 +00:00
Evan Cheng 7ab6123c42 VLOAD is not the LoadSDNode opcode. 
llvm-svn: 31276
 2006-10-29 06:14:47 +00:00
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