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27091 Commits

Author SHA1 Message Date
Chris Lattner ce7906922d new testcase 
llvm-svn: 31131
 2006-10-23 18:54:35 +00:00
Chris Lattner 4c931502cc Minor tweak. Instead of generating: 
movl 32(%esp), %eax
        cmpl $1, %eax
        je LBB1_1       #bb
LBB1_4: #entry
        cmpl $2, %eax
        je LBB1_2       #bb2
        jmp LBB1_3      #UnifiedReturnBlock
LBB1_1: #bb

notice that we would miss the fall through and emit this instead:

        movl 32(%esp), %eax
        cmpl $2, %eax
        je LBB1_2       #bb2
LBB1_4: #entry
        cmpl $1, %eax
        jne LBB1_3      #UnifiedReturnBlock
LBB1_1: #bb

llvm-svn: 31130
 2006-10-23 18:38:22 +00:00
Jim Laskey 5e1a34032b More complete solution to deleting blocks and debug info. 
llvm-svn: 31129
 2006-10-23 14:56:37 +00:00
Jim Laskey bd7a1d2b4d [SU]int update - inactive code may get activated someday 
llvm-svn: 31128
 2006-10-23 14:39:22 +00:00
Evan Cheng 7838d655ca Fix test case. 
llvm-svn: 31127
 2006-10-23 05:11:09 +00:00
Nick Lewycky 53b4158448 Remove the Backwards operation. Resolving now works at the time when a 
property is added by running through the list of uses of the value and
adding resolved properties to the property set.

llvm-svn: 31126
 2006-10-23 01:56:02 +00:00
Chris Lattner 76a7bc8c55 Fix phi node updating for switches lowered to linear sequences of branches. 
llvm-svn: 31125
 2006-10-22 23:00:53 +00:00
Chris Lattner 4c3ef4782d disable this code for now, it's not yet safely updating phi nodes 
llvm-svn: 31124
 2006-10-22 22:47:10 +00:00
Nick Lewycky 6f5c30fcec Fix similar missing optimization opportunity in XOR. 
llvm-svn: 31123
 2006-10-22 22:22:58 +00:00
Chris Lattner bb3084546a this part implemented. 
llvm-svn: 31122
 2006-10-22 21:40:12 +00:00
Nick Lewycky af2b0571d0 Whoops! Add missing NULL check. 
llvm-svn: 31121
 2006-10-22 21:38:24 +00:00
Anton Korobeynikov 41a83d7871 Do section switching right way for Mingw\Cygwin and Linux. 
This will allow (after llvm-gcc linkage fix) more dummy tests using
libstdc++ to pass on mingw :)

llvm-svn: 31120
 2006-10-22 21:37:13 +00:00
Chris Lattner 6d6fc26257 Implement PR964 and Regression/CodeGen/Generic/SwitchLowering.ll 
llvm-svn: 31119
 2006-10-22 21:36:53 +00:00
Nick Lewycky 2c734f3fc1 Handle "if ((x|y) != 0)" for ints like we do for bools. Fixes missed 
optimization opportunity pointed out by Chris Lattner.

llvm-svn: 31118
 2006-10-22 21:36:41 +00:00
Chris Lattner 76dd3bb34a new testcase for PR964 
llvm-svn: 31117
 2006-10-22 21:36:06 +00:00
Nick Lewycky f345008339 AllocaInst can't return a null pointer. Fixes missed optimization 
opportunity pointed out by Andrew Lewycky.

llvm-svn: 31115
 2006-10-22 19:53:27 +00:00
Chris Lattner 250eff20da Add a workaround for PR962, disabling the more aggressive form of this 
transformation.  This speeds up a C++ app 2.25x.

llvm-svn: 31113
 2006-10-22 18:42:26 +00:00
Reid Spencer aa1c614784 Don't generate a prototype for _setjmp. At least on Linux, this function 
has a different prototype than the one #included from <setjmp.h>. This
patch fixes siod and a number of other test cases on Linux that were
failing the CBE because of this _setjmp issue.

llvm-svn: 31112
 2006-10-22 09:58:21 +00:00
Reid Spencer c7212791a4 Regenerate. 
llvm-svn: 31111
 2006-10-22 07:03:43 +00:00
Reid Spencer 6309fa1438 Remove unneeded CHECK_FOR_ERROR invocations. 
llvm-svn: 31110
 2006-10-22 07:03:09 +00:00
Chris Lattner 7d1d03445e regenerate 
llvm-svn: 31109
 2006-10-22 06:08:13 +00:00
Chris Lattner fd3d29a978 change keyword to datalayout 
llvm-svn: 31108
 2006-10-22 06:07:41 +00:00
Chris Lattner 0489716a67 Change keyword to datalayout 
llvm-svn: 31107
 2006-10-22 06:06:56 +00:00
Chris Lattner af17096dcf 3 Changes: 
1. Better document what is going on here.
2. Only hack on one branch per iteration, making the results less conservative.
3. Handle the problematic case by marking edges executable instead of by
   playing with value lattice states.  This is far less pessimistic, and fixes
   SCCP/ipsccp-gvar.ll.

llvm-svn: 31106
 2006-10-22 05:59:17 +00:00
Chris Lattner 097971202e New, wonderful isSuccessor method 
llvm-svn: 31103
 2006-10-21 06:50:05 +00:00
Chris Lattner 9f5a129543 don't break infinite loops 
llvm-svn: 31102
 2006-10-21 06:11:43 +00:00
Chris Lattner 23f22de26f Implement support for branch reversal, fix a bug in branch analysis. 
This provides stuff like:

        cmpw cr0, r15, r29
        mr r14, r15
-       bge cr0, LBB3_111       ;bb656
-       b LBB3_90       ;bb501
+       blt cr0, LBB3_90        ;bb501
 LBB3_111:      ;bb656
        lwz r18, 68(r1)

which is particularly good for dispatch group formation.

llvm-svn: 31101
 2006-10-21 06:03:11 +00:00
Chris Lattner 28f17f45be Use branch reversal to do stuff like this: 
call L_strcmp$stub
        testl %eax, %eax
-       jne LBB26_208   #cond_true6020
-       jmp LBB26_227   #bb7119
+       je LBB26_227    #bb7119
 LBB26_208:     #cond_true6020
        movl $l31_str14, 4(%esp)

        testl %eax, %eax
-       jne LBB26_704   #cond_true13042
-       jmp LBB26_713   #bb13151
+       je LBB26_713    #bb13151
 LBB26_704:     #cond_true13042
        movl $_str52, 4(%esp)

        cmpl 76(%ecx), %eax
-       jge LBB26_1628  #cond_false63.i.i
-       jmp LBB26_1769  #_Z8makeGridP13mrSurfaceListidiidd.exit.i
+       jl LBB26_1769   #_Z8makeGridP13mrSurfaceListidiidd.exit.i
 LBB26_1628:    #cond_false63.i.i
        movl $0, 48964(%esp)

llvm-svn: 31100
 2006-10-21 05:54:00 +00:00
Chris Lattner 3a897f31fa Implement support for branch condition reversal. 
llvm-svn: 31099
 2006-10-21 05:52:40 +00:00
Chris Lattner 3ca52185af Transform code like: 
jle FOO
  jmp BAR
BAR:

into:

  jle FOO
BAR:

... whoa!

llvm-svn: 31098
 2006-10-21 05:43:30 +00:00
Chris Lattner d881660366 Simplify code, no functionality change 
llvm-svn: 31097
 2006-10-21 05:42:09 +00:00
Chris Lattner 94e04442eb implement support for inserting a cond branch 
llvm-svn: 31096
 2006-10-21 05:36:13 +00:00
Chris Lattner 6fca75ec05 allow insertion of a conditional branch with fall-through 
llvm-svn: 31095
 2006-10-21 05:34:23 +00:00
Chris Lattner 4fe01c42ca Three changes: 
1. Remove a bunch of ifdef'd code.
2. When a block just contains an uncond branch, change all blocks branching
   to it to jump to the destination instead.
3. If branch analysis tells us some edges in the machinecfg are not actually
   possible, remove them.

#2 triggers a suprisingly large number of times.

llvm-svn: 31094
 2006-10-21 05:08:28 +00:00
Chris Lattner 20e75d4635 update assert message 
llvm-svn: 31093
 2006-10-21 04:42:29 +00:00
Chris Lattner 60c9d4dc76 Add an experimental cross-jumping implementation. 
This is currently disabled by default and limited in several ways, but does
have a positive effect.

llvm-svn: 31090
 2006-10-21 00:47:49 +00:00
Chris Lattner 96fd2b28f1 typo 
llvm-svn: 31089
 2006-10-20 22:44:45 +00:00
Chris Lattner 33f5af09e4 implement MachineOperand::isIdenticalTo 
llvm-svn: 31088
 2006-10-20 22:39:59 +00:00
Chris Lattner 0f4db78dfe add isIdenticalTo method to machineinstr/operand. 
llvm-svn: 31087
 2006-10-20 22:39:36 +00:00
Chris Lattner af1222c1a7 llvm-extract should remove module-level asm 
llvm-svn: 31086
 2006-10-20 21:35:41 +00:00
Chris Lattner 8366b874a9 bugfix 
llvm-svn: 31074
 2006-10-20 20:44:34 +00:00
Chris Lattner 319c86fd38 Fix an ugly problem in SCCP. This fixes Benchmarks/Misc-C++/mandel-text.cpp 
llvm-svn: 31073
 2006-10-20 20:19:08 +00:00
Chris Lattner 5dee3b2526 Fix miscompilation of MallocBench/espresso which code review pointed out 
but apparently didn't make it into the final patch.

llvm-svn: 31070
 2006-10-20 18:20:21 +00:00
Bill Wendling c5c11a8070 Changed the pattern matching so that it will hopefully work on Linux. 
llvm-svn: 31069
 2006-10-20 18:15:24 +00:00
Devang Patel 4f4d3ec985 Test case for 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20061016/038780.html

llvm-svn: 31068
 2006-10-20 18:06:37 +00:00
Chris Lattner c5ab6ce613 Make flag and chain edges visually distinguishable from value edges in DOT 
output.

llvm-svn: 31067
 2006-10-20 18:06:09 +00:00
Chris Lattner 819cb9ad61 add method 
llvm-svn: 31066
 2006-10-20 18:00:03 +00:00
Chris Lattner c0fb567e23 Implement branch analysis/xform hooks required by the branch folding pass. 
llvm-svn: 31065
 2006-10-20 17:42:20 +00:00
Reid Spencer a91e4be84f Fix a comment to be accurate. 
llvm-svn: 31064
 2006-10-20 07:24:55 +00:00
Reid Spencer e0fc4dfc22 For PR950: 
This patch implements the first increment for the Signless Types feature.
All changes pertain to removing the ConstantSInt and ConstantUInt classes
in favor of just using ConstantInt.

llvm-svn: 31063
 2006-10-20 07:07:24 +00:00