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Author SHA1 Message Date
Nick Lewycky
b81c926e06 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
696ed4adae new testcase for PR964 
llvm-svn: 31117
 2006-10-22 21:36:06 +00:00
Nick Lewycky
c680dabd94 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
51e762d4cb 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
65b4f5b2dd 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
9ca9ec40f1 Regenerate. 
llvm-svn: 31111
 2006-10-22 07:03:43 +00:00
Reid Spencer
9caeb2165b Remove unneeded CHECK_FOR_ERROR invocations. 
llvm-svn: 31110
 2006-10-22 07:03:09 +00:00
Chris Lattner
25fd3d8b99 regenerate 
llvm-svn: 31109
 2006-10-22 06:08:13 +00:00
Chris Lattner
0bf0490e0c change keyword to datalayout 
llvm-svn: 31108
 2006-10-22 06:07:41 +00:00
Chris Lattner
9e59066602 Change keyword to datalayout 
llvm-svn: 31107
 2006-10-22 06:06:56 +00:00
Chris Lattner
50b3810d9a 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
9b527c4477 New, wonderful isSuccessor method 
llvm-svn: 31103
 2006-10-21 06:50:05 +00:00
Chris Lattner
9e7d74961b don't break infinite loops 
llvm-svn: 31102
 2006-10-21 06:11:43 +00:00
Chris Lattner
a9adb1e558 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
210d322b1f 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
016325f336 Implement support for branch condition reversal. 
llvm-svn: 31099
 2006-10-21 05:52:40 +00:00
Chris Lattner
cf7f500cfd 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
20bb8bfd45 Simplify code, no functionality change 
llvm-svn: 31097
 2006-10-21 05:42:09 +00:00
Chris Lattner
d3e583b2e1 implement support for inserting a cond branch 
llvm-svn: 31096
 2006-10-21 05:36:13 +00:00
Chris Lattner
b638d287f4 allow insertion of a conditional branch with fall-through 
llvm-svn: 31095
 2006-10-21 05:34:23 +00:00
Chris Lattner
d4cb8dc857 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
596c126372 update assert message 
llvm-svn: 31093
 2006-10-21 04:42:29 +00:00
Chris Lattner
52a4558cf2 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
f959f98fda typo 
llvm-svn: 31089
 2006-10-20 22:44:45 +00:00
Chris Lattner
cf4137d0b9 implement MachineOperand::isIdenticalTo 
llvm-svn: 31088
 2006-10-20 22:39:59 +00:00
Chris Lattner
b9ea8d6ddd add isIdenticalTo method to machineinstr/operand. 
llvm-svn: 31087
 2006-10-20 22:39:36 +00:00
Chris Lattner
ef1a8ce64a llvm-extract should remove module-level asm 
llvm-svn: 31086
 2006-10-20 21:35:41 +00:00
Chris Lattner
3fb2b87f17 bugfix 
llvm-svn: 31074
 2006-10-20 20:44:34 +00:00
Chris Lattner
6ea0134893 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
38ed7d9e49 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
da5290e752 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
90e5f0400c 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
2f54afc364 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
684db58e17 add method 
llvm-svn: 31066
 2006-10-20 18:00:03 +00:00
Chris Lattner
62a0f00312 Implement branch analysis/xform hooks required by the branch folding pass. 
llvm-svn: 31065
 2006-10-20 17:42:20 +00:00
Reid Spencer
82347acc95 Fix a comment to be accurate. 
llvm-svn: 31064
 2006-10-20 07:24:55 +00:00
Reid Spencer
d414793dbc 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
Devang Patel
b030b91f4a While creating mask, use 1ULL instead of 1. 
llvm-svn: 31062
 2006-10-20 01:16:56 +00:00
Chris Lattner
d9aa90ded4 Fix SimplifyCFG/2006-10-19-UncondDiv.ll by disabling a bad xform. 
llvm-svn: 31061
 2006-10-20 00:42:07 +00:00
Chris Lattner
74b2337a26 new testcase for PR957 
llvm-svn: 31060
 2006-10-20 00:41:31 +00:00
Chris Lattner
5b4ca99562 add a method to determine whether evaluation of a constant can trap. 
llvm-svn: 31059
 2006-10-20 00:27:06 +00:00
Bill Wendling
14b1a3c31b Testcase for P926 
llvm-svn: 31058
 2006-10-19 23:21:59 +00:00
Bill Wendling
edce5ede57 Partially in response to PR926: insert the newly created machine basic 
blocks into the basic block list when lowering the switch inst. into a
binary tree of if-then statements. This allows the "visitSwitchCase" func
to allow for fall-through behavior.

llvm-svn: 31057
 2006-10-19 21:46:38 +00:00
Devang Patel
880a9d823f It is OK to remove extra cast if operation is EQ/NE even though source 
and destination sign may not match but other conditions are met.

llvm-svn: 31056
 2006-10-19 20:59:13 +00:00
Devang Patel
88406a6e1e Typo Typo. 
llvm-svn: 31055
 2006-10-19 19:21:36 +00:00
Devang Patel
277990c79f Typo. 
llvm-svn: 31054
 2006-10-19 19:05:38 +00:00
Devang Patel
d9ade71cc7 Fix bug in PR454 resolution. Added new test case. 
This fixes llvmAsmParser.cpp miscompile by llvm on PowerPC Darwin.

llvm-svn: 31053
 2006-10-19 18:54:08 +00:00
Rafael Espindola
c08546401b use Pat to implement extloadi8 and extloadi16 
llvm-svn: 31052
 2006-10-19 17:05:03 +00:00
Reid Spencer
bddf9a66ec 80 cols fix. 
llvm-svn: 31050
 2006-10-19 15:24:04 +00:00
Rafael Espindola
35e92188e0 implement undef 
llvm-svn: 31049
 2006-10-19 13:45:00 +00:00