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Commit Graph

385 Commits

Author SHA1 Message Date
Jeff Cohen
6c42217055 Eliminate tabs and trailing spaces
llvm-svn: 21480
2005-04-23 21:38:35 +00:00
Misha Brukman
53e199440e Remove trailing whitespace
llvm-svn: 21427
2005-04-21 23:48:37 +00:00
Chris Lattner
472c891d23 Improve doxygen documentation, patch contributed by Evan Jones!
llvm-svn: 21393
2005-04-21 16:04:49 +00:00
Chris Lattner
6ce1b109aa 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
ee06161a63 Get rid of this for_each loop
llvm-svn: 21253
2005-04-12 18:51:33 +00:00
Chris Lattner
c9a3ea81bf 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
4b688a1c70 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
1ccff5c8c7 second argument to Value::setName is now gone.
llvm-svn: 20463
2005-03-05 19:05:20 +00:00
Chris Lattner
a024984017 Fix spelling, patch contributed by Gabor Greif!
llvm-svn: 20343
2005-02-27 06:18:25 +00:00
Chris Lattner
14f720d625 remove extraneous cast
llvm-svn: 20334
2005-02-26 18:33:28 +00:00
Chris Lattner
7a434679c3 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
ccc0c99fae switchinst ctor now takes a hint for the number of cases that it will have.
llvm-svn: 19898
2005-01-29 00:38:26 +00:00
Chris Lattner
5fff877f74 Implement SimplifyCFG/DeadSetCC.ll
SimplifyCFG is one of those passes that we use for final cleanup: it should
not rely on other passes to clean up its garbage.  This fixes the "why are
trivially dead setcc's in the output of gccas" problem.

llvm-svn: 19212
2005-01-01 16:02:12 +00:00
Chris Lattner
8378361f0c The split bb is really the exit of the old function
llvm-svn: 18799
2004-12-11 16:59:54 +00:00
Chris Lattner
40e97884f6 Fix Regression/Transforms/SimplifyCFG/2004-12-10-SimplifyCFGCrash.ll,
and the failure on make_dparser last night.

llvm-svn: 18766
2004-12-10 17:42:31 +00:00
Chris Lattner
c58bc8d96e Squelch warning
llvm-svn: 18381
2004-11-30 07:47:34 +00:00
Chris Lattner
537e5a6b50 Fix test/Regression/Transforms/LICM/2004-09-14-AliasAnalysisInvalidate.llx
This only fails on darwin or on X86 under valgrind.

llvm-svn: 18377
2004-11-30 07:01:15 +00:00
Chris Lattner
25b93fea2a Alkis noticed that this variable is dead. Thanks!
llvm-svn: 18369
2004-11-30 04:01:44 +00:00
Chris Lattner
b237a19a78 If we have something like this:
if (x) {
    code
    ...
  } else {
    code
    ...
  }

Turn it into:

  code
  if (x) {
    ...
  } else {
    ...
  }

This reduces code size and in some common cases allows us to completely
eliminate the conditional.  This turns several if/then/else blocks in loops
into straightline code in 179.art, turning the loops into single basic blocks
(good for modsched even!).

Maybe now brg will leave me alone ;-)

llvm-svn: 18366
2004-11-30 00:29:14 +00:00
Misha Brukman
9dd523842a Allow constructor parameter to override aggregating args; fix spacing
llvm-svn: 18028
2004-11-20 02:20:27 +00:00
Chris Lattner
ab917141d0 Fix: CodeExtractor/2004-11-12-InvokeExtract.ll
llvm-svn: 17699
2004-11-13 00:06:45 +00:00
Chris Lattner
c6b1d7a081 Fix a bug where the code extractor would get a bit confused handling invoke
instructions, setting DefBlock to a block it did not have dom info for.

llvm-svn: 17697
2004-11-12 23:50:44 +00:00
Chris Lattner
3083f2a424 Do not compute the predecessor list for a block unless we need it.
This speeds up simplifycfg on this program, from 44.87s to 0.29s (with
a profiled build):

 #define CL0(a) case a: goto c;
 #define CL1(a) CL0(a##0) CL0(a##1) CL0(a##2) CL0(a##3) CL0(a##4) CL0(a##5) \
 CL0(a##6) CL0(a##7) CL0(a##8) CL0(a##9)
 #define CL2(a) CL1(a##0) CL1(a##1) CL1(a##2) CL1(a##3) CL1(a##4) CL1(a##5) \
 CL1(a##6) CL1(a##7) CL1(a##8) CL1(a##9)
 #define CL3(a) CL2(a##0) CL2(a##1) CL2(a##2) CL2(a##3) CL2(a##4) CL2(a##5) \
 CL2(a##6) CL2(a##7) CL2(a##8) CL2(a##9)
 #define CL4(a) CL3(a##0) CL3(a##1) CL3(a##2) CL3(a##3) CL3(a##4) CL3(a##5) \
 CL3(a##6) CL3(a##7) CL3(a##8) CL3(a##9)

 void f();

 void a() {
     int b;
  c: switch (b) {
         CL4(1)
     }
 }

This testcase is contrived to expose N^2 behavior, but this patch should speedup
simplifycfg on any programs that use large switch statements.  This testcase
comes from GCC PR17895.

llvm-svn: 17389
2004-11-01 06:53:58 +00:00
Reid Spencer
d3f7233495 Change Library Names Not To Conflict With Others When Installed
llvm-svn: 17286
2004-10-27 23:18:45 +00:00
Reid Spencer
9f6f128630 Eliminate compilation warning on uninitialized variable.
llvm-svn: 17163
2004-10-22 16:10:39 +00:00
Reid Spencer
e48ba34fd4 We won't use automake
llvm-svn: 17155
2004-10-22 03:35:04 +00:00
Reid Spencer
ce514b1c2c Initial automake generated Makefile template
llvm-svn: 17136
2004-10-18 23:55:41 +00:00
Reid Spencer
2b5cfe8be8 Correction to allow compilation with Visual C++.
Patch contributed by Morten Ofstad. Thanks Morten!

llvm-svn: 17123
2004-10-18 14:38:48 +00:00
Chris Lattner
b1827a765a Simplify code by deleting instructions that preceed unreachable instructions.
Simplify code by simplifying terminators that branch to blocks that start
with an unreachable instruction.

llvm-svn: 17116
2004-10-18 04:07:22 +00:00
Chris Lattner
f7bf129037 Fix a bug that occurs when the constant value is the result of an invoke. In
particular, invoke ret values are only live in the normal dest of the invoke
not in the unwind dest.

llvm-svn: 17108
2004-10-18 01:21:17 +00:00
Chris Lattner
9e7ddf8596 Fix Regression/Transforms/Inline/2004-10-17-InlineFunctionWithoutReturn.ll
If a function had no return instruction in it, and the result of the inlined
call instruction was used, we would crash.

llvm-svn: 17104
2004-10-17 23:21:07 +00:00
Chris Lattner
ac92e5fcd0 When inserting PHI nodes, don't insert any phi nodes that are obviously
unneccesary.  This allows us to delete several hundred phi nodes of the
form PHI(x,x,x,undef) from 253.perlbmk and probably other programs as well.

This implements Mem2Reg/UndefValuesMerge.ll

llvm-svn: 17098
2004-10-17 21:25:56 +00:00
Chris Lattner
306dd8a44a Enhance hasConstantValue to ignore undef values in phi nodes. This allows it
to think that PHI[4, undef] == 4.

llvm-svn: 17096
2004-10-17 21:23:26 +00:00
Chris Lattner
2fae8a1ef9 Add support for unreachable
llvm-svn: 17056
2004-10-16 18:21:33 +00:00
Chris Lattner
4fca8caaee Add support for UndefValue
llvm-svn: 17046
2004-10-16 18:10:31 +00:00
Chris Lattner
ca01f160ee When promoting mem2reg, make uninitialized values become undef isntead of 0.
llvm-svn: 17045
2004-10-16 18:10:06 +00:00
Chris Lattner
88ad718c75 When converting phi nodes into select instructions, we shouldn't promote PHI
nodes unless we KNOW that we are able to promote all of them.

This fixes: test/Regression/Transforms/SimplifyCFG/PhiNoEliminate.ll

llvm-svn: 16973
2004-10-14 05:13:36 +00:00
Reid Spencer
e6418ec30f Update to reflect changes in Makefile rules.
llvm-svn: 16950
2004-10-13 11:46:52 +00:00
Reid Spencer
1b7459b29d Initial version of automake Makefile.am file.
llvm-svn: 16893
2004-10-10 22:20:40 +00:00
Chris Lattner
778a49acfd Do not insert trivially dead select instructions, which allows us to
potentially fold more in one pass.

llvm-svn: 16583
2004-09-29 05:43:32 +00:00
Chris Lattner
98d434988e Remove a whole bunch of horrible hacky code that was used to promote allocas
whose addresses where used by trivial phi nodes and select instructions.  This
is now performed by the instcombine pass, which is more powerful, is much
simpler, and is faster.  This allows the deletion of a bunch of code, two
FIXME's and two gotos.

llvm-svn: 16406
2004-09-19 18:51:51 +00:00
Chris Lattner
f31ae4da07 Make sure to remove the Select instruction as well
llvm-svn: 16389
2004-09-18 00:32:40 +00:00
Reid Spencer
c6a8d70cff Convert code to compile with vc7.1.
Patch contributed by Paolo Invernizzi. Thanks Paolo!

llvm-svn: 16368
2004-09-15 17:06:42 +00:00
Chris Lattner
1d9b957384 If given an AliasSetTracker object to update, update it.
llvm-svn: 16347
2004-09-15 01:02:54 +00:00
Alkis Evlogimenos
0c50e0f211 Fixes to make LLVM compile with vc7.1.
Patch contributed by Paolo Invernizzi!

llvm-svn: 16152
2004-09-03 18:19:51 +00:00
Reid Spencer
c4abcbefb1 Changes For Bug 352
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.

llvm-svn: 16137
2004-09-01 22:55:40 +00:00
Chris Lattner
84445ee674 If we are extracting a block that has multiple successors that are the same
block (common in a switch), make sure to remove extra edges in successor
blocks.  This fixes CodeExtractor/2004-08-12-BlockExtractPHI.ll and should
be pulled into LLVM 1.3 (though the regression test need not be, as that
would require pulling in the LoopExtract.cpp changes).

llvm-svn: 15717
2004-08-13 03:27:07 +00:00
Chris Lattner
2c3ad7902d When we code extract some stuff, leave the codeRepl block in the place where
the extracted code was, instead of putting it at the end of the function

llvm-svn: 15716
2004-08-13 03:17:39 +00:00
Chris Lattner
7abc1c2473 Add value mapper support for select constant exprs. This should fix a bug
Nate ran into when bugpointing siod.  This fix should go into LLVM 1.3

llvm-svn: 15712
2004-08-13 02:43:19 +00:00
Chris Lattner
85e2339cfa Fix code extraction of unwind blocks. This fixed bugs that bugpoint can
run into.  This should go into 1.3

llvm-svn: 15679
2004-08-12 03:17:02 +00:00