shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
31,724 Commits 1,713 Branches 298 Tags
Commit Graph

3100 Commits

Author SHA1 Message Date
Chris Lattner
a3159af703 Fix a bug where we would not promote calls to invokes if they occured in 
the same block as the setjmp.  Thanks to Greg Pettyjohn for noticing this!

llvm-svn: 21403
 2005-04-21 16:46:46 +00:00
Chris Lattner
7ceb081f3f Improve doxygen documentation, patch contributed by Evan Jones! 
llvm-svn: 21393
 2005-04-21 16:04:49 +00:00
Chris Lattner
374e659466 Instcombine this: 
%shortcirc_val = select bool %tmp.1, bool true, bool %tmp.4             ; <bool> [#uses=1]
        %tmp.6 = cast bool %shortcirc_val to int                ; <int> [#uses=1]

into this:

        %shortcirc_val = or bool %tmp.1, %tmp.4         ; <bool> [#uses=1]
        %tmp.6 = cast bool %shortcirc_val to int                ; <int> [#uses=1]

not this:

        %tmp.4.cast = cast bool %tmp.4 to int           ; <int> [#uses=1]
        %tmp.6 = select bool %tmp.1, int 1, int %tmp.4.cast             ; <int> [#uses=1]

llvm-svn: 21389
 2005-04-21 05:43:13 +00:00
Chris Lattner
b38b443b15 Teach simplifycfg that setcc is cheap and non-trapping, so that it can 
convert this:

        %tmp.1 = seteq int %i, 0                ; <bool> [#uses=1]
        br bool %tmp.1, label %shortcirc_done, label %shortcirc_next

shortcirc_next:         ; preds = %entry
        %tmp.4 = seteq int %j, 0                ; <bool> [#uses=1]
        br label %shortcirc_done

shortcirc_done:         ; preds = %shortcirc_next, %entry
        %shortcirc_val = phi bool [ %tmp.4, %shortcirc_next ], [ true, %entry ]         ; <bool> [#uses=1]

to this:
        %tmp.1 = seteq int %i, 0                ; <bool> [#uses=1]
        %tmp.4 = seteq int %j, 0                ; <bool> [#uses=1]
        %shortcirc_val = select bool %tmp.1, bool true, bool %tmp.4             ; <bool> [#uses=1]

... which is later simplified by instcombine into an or.

llvm-svn: 21388
 2005-04-21 05:31:13 +00:00
Chris Lattner
8cb10a1775 Wrap some long lines. 
Make IPSCCP strip off dead constant exprs that are using functions, making
them appear as though their address is taken.  This allows us to propagate
some more pool descriptors, lowering the overhead of pool alloc.

llvm-svn: 21363
 2005-04-19 19:16:19 +00:00
Chris Lattner
5c219469a0 Eliminate a broken transformation, fixing PR548 
llvm-svn: 21354
 2005-04-19 06:04:18 +00:00
Chris Lattner
ee84413730 silence a bogus warning 
llvm-svn: 21320
 2005-04-18 05:26:21 +00:00
Chris Lattner
16a50fd0a0 a new simple pass, which will be extended to be more useful in the future. 
This pass forward branches through conditions when it can show that the
conditions is either always true or false for a predecessor.  This currently
only handles the most simple cases of this, but is successful at threading
across 2489 branches and 65 switch instructions in 176.gcc, which isn't bad.

llvm-svn: 21306
 2005-04-15 19:28:32 +00:00
Chris Lattner
95f16a3ac4 Get rid of this for_each loop 
llvm-svn: 21253
 2005-04-12 18:51:33 +00:00
Chris Lattner
4236261930 Fix bug: InstCombine/2005-05-07-UDivSelectCrash.ll 
llvm-svn: 21152
 2005-04-08 04:03:26 +00:00
Chris Lattner
4706046e68 Implement the following xforms: 
(X-Y)-X --> -Y
A + (B - A) --> B
(B - A) + A --> B

llvm-svn: 21138
 2005-04-07 17:14:51 +00:00
Chris Lattner
c7f3c1a00e Implement InstCombine/add.ll:test28, transforming C1-(X+C2) --> (C1-C2)-X. 
This occurs several dozen times in specint2k, particularly in crafty and gcc
apparently.

llvm-svn: 21136
 2005-04-07 16:28:01 +00:00
Chris Lattner
a9be4490d8 Transform X-(X+Y) == -Y and X-(Y+X) == -Y 
llvm-svn: 21134
 2005-04-07 16:15:25 +00:00
Chris Lattner
ecfa9b5810 disable this transformation in the one obscure case that really pessimizes 
pointer analysis.

llvm-svn: 20916
 2005-03-29 06:37:47 +00:00
Alkis Evlogimenos
9ead0d7b4c Rename createPromoteMemoryToRegister() to 
createPromoteMemoryToRegisterPass() to be consistent with other pass
creation functions.

llvm-svn: 20885
 2005-03-28 02:01:12 +00:00
Chris Lattner
514e843e89 Enhance loopsimplify to preserve alias analysis instead of clobbering it. 
This prevents crashes on some programs when using -ds-aa -licm.

llvm-svn: 20831
 2005-03-25 06:37:22 +00:00
Chris Lattner
faf7791fea Fix a bug where LICM was not updating AA information properly when sinking 
a pointer value out of a loop causing it to be duplicated.

llvm-svn: 20828
 2005-03-25 00:22:36 +00:00
Chris Lattner
1c790bf656 enable -debug-only=licm 
llvm-svn: 20788
 2005-03-23 21:00:12 +00:00
Chris Lattner
7b9020a059 Fix the missing symbols problem Bill was hitting. Patch contributed by 
Bill Wendling!!

llvm-svn: 20649
 2005-03-17 15:38:16 +00:00
Chris Lattner
6cb4559369 stop using method. 
llvm-svn: 20603
 2005-03-15 05:19:49 +00:00
Chris Lattner
531f9e92d4 This mega patch converts us from using Function::a{iterator|begin|end} to 
using Function::arg_{iterator|begin|end}.  Likewise Module::g* -> Module::global_*.

This patch is contributed by Gabor Greif, thanks!

llvm-svn: 20597
 2005-03-15 04:54:21 +00:00
Chris Lattner
8c79559443 fix a bug where we thought arguments were constants :( 
llvm-svn: 20506
 2005-03-06 22:52:29 +00:00
Chris Lattner
2ce303b406 Fix Regression/Transforms/LoopStrengthReduce/dont_insert_redundant_ops.ll, 
hopefully not breaking too many other things.

llvm-svn: 20505
 2005-03-06 22:36:12 +00:00
Chris Lattner
45403e5052 implement Transforms/LoopStrengthReduce/invariant_value_first_arg.ll 
llvm-svn: 20501
 2005-03-06 22:06:22 +00:00
Chris Lattner
d3874fad44 minor simplifications of the code. 
llvm-svn: 20497
 2005-03-06 21:58:22 +00:00
Chris Lattner
dd3ec92085 trivial simplification 
llvm-svn: 20494
 2005-03-06 21:35:38 +00:00
Chris Lattner
238f6df546 Fix a bug where we could corrupt a parent loop's header info if we unrolled 
a nested loop.  This fixes Transforms/LoopUnroll/2005-03-06-BadLoopInfoUpdate.ll
and PR532

llvm-svn: 20493
 2005-03-06 20:57:32 +00:00
Chris Lattner
1b032f59e7 Make this MUCH faster by avoiding a linear search in the symbol table code. 
llvm-svn: 20479
 2005-03-06 05:42:36 +00:00
Jeff Cohen
4abcea3a69 Reformat comments to fix 80 columns. 
llvm-svn: 20467
 2005-03-05 22:45:40 +00:00
Jeff Cohen
be37fa07fd Reuse induction variables created for strength-reduced GEPs by other similar GEPs. 
llvm-svn: 20466
 2005-03-05 22:40:34 +00:00
Chris Lattner
6d0a24c608 second argument to Value::setName is now gone. 
llvm-svn: 20463
 2005-03-05 19:05:20 +00:00
Chris Lattner
cfe2822cdf Do not compute 1ULL << 64, which is undefined. This fixes Ptrdist/ks on the 
sparc, and testcase Regression/Transforms/InstCombine/2005-03-04-ShiftOverflow.ll

llvm-svn: 20445
 2005-03-04 23:21:33 +00:00
Jeff Cohen
a2c59b7423 Add support for not strength reducing GEPs where the element size is a small 
power of two.  This emphatically includes the zeroeth power of two.

llvm-svn: 20429
 2005-03-04 04:04:26 +00:00
Chris Lattner
ef1e989e4f Add an optional argument to lower to a specific constant value instead of 
to a "sizeof" expression.

llvm-svn: 20414
 2005-03-03 01:03:43 +00:00
Jeff Cohen
8ea6f9e821 Fixed the following LSR bugs: 
* Loop invariant code does not dominate the loop header, but rather
    the end of the loop preheader.

  * The base for a reduced GEP isn't a constant unless all of its
    operands (preceding the induction variable) are constant.

  * Allow induction variable elimination for the simple case after all.

Also made changes recommended by Chris for properly deleting
instructions.

llvm-svn: 20383
 2005-03-01 03:46:11 +00:00
Jeff Cohen
dcaa48b5c4 Fix crash in LSR due to attempt to remove original induction variable. However, 
for reasons explained in the comments, I also deactivated this code as it needs
more thought.

llvm-svn: 20367
 2005-02-28 00:08:56 +00:00
Jeff Cohen
fd63d3af0d PHI nodes were incorrectly placed when more than one GEP is reduced in a loop. 
llvm-svn: 20360
 2005-02-27 21:08:04 +00:00
Jeff Cohen
39751c3b7c First pass at improved Loop Strength Reduction. Still not yet ready for prime time. 
llvm-svn: 20358
 2005-02-27 19:37:07 +00:00
Chris Lattner
7561ca1d15 Teach globalopt how memset/cpy/move affect memory, to allow better optimization. 
llvm-svn: 20352
 2005-02-27 18:58:52 +00:00
Chris Lattner
0ce80cd542 Fix spelling, patch contributed by Gabor Greif! 
llvm-svn: 20343
 2005-02-27 06:18:25 +00:00
Chris Lattner
cc6d75fddf remove extraneous cast 
llvm-svn: 20334
 2005-02-26 18:33:28 +00:00
Chris Lattner
1cca959e5d Implement Transforms/SimplifyCFG/switch_thread.ll 
This does a simple form of "jump threading", which eliminates CFG edges that
are provably dead.  This triggers 90 times in the external tests, and
eliminating CFG edges is always always a good thing! :)

llvm-svn: 20300
 2005-02-24 06:17:52 +00:00
Chris Lattner
25169caa80 make this more efficient. Scan up to 16 nodes, not the whole list. 
llvm-svn: 20289
 2005-02-23 16:53:04 +00:00
Chris Lattner
52e931b37d Remove use of bind_obj 
llvm-svn: 20276
 2005-02-22 23:22:58 +00:00
Chris Lattner
7b5d9e2217 Do not mark obviously unreachable blocks live when processing PHI nodes, 
and handle incomplete control dependences correctly.  This fixes:

Regression/Transforms/ADCE/dead-phi-edge.ll
  -> a missed optimization

Regression/Transforms/ADCE/dead-phi-edge.ll
  -> a compiler crash distilled from QT4

llvm-svn: 20227
 2005-02-17 19:28:49 +00:00
Chris Lattner
31f3382b3b Fix the second bug attached to PR504. 
llvm-svn: 20181
 2005-02-14 20:11:45 +00:00
Chris Lattner
e616fea3bc Fix for testcase Transforms/IndVarsSimplify/2005-02-11-InvokeCrash.ll 
and PR504.

llvm-svn: 20129
 2005-02-12 03:26:49 +00:00
Alkis Evlogimenos
c4a44c6b3d Localize globals if they are only used in main(). This replaces the 
global with an alloca, which eventually gets promoted into a
register. This enables a lot of other optimizations later on.

llvm-svn: 20109
 2005-02-10 18:36:30 +00:00
Alkis Evlogimenos
346bb20409 Fix crash on MallocInsts of unsized types. 
llvm-svn: 19988
 2005-02-02 04:43:37 +00:00
Chris Lattner
82b42c5d85 API change. 
llvm-svn: 19959
 2005-02-01 01:23:49 +00:00