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6013 Commits

Author SHA1 Message Date
Chris Lattner
aa1c0d5e76 Allow clients to be more efficient. 
llvm-svn: 12831
 2004-04-11 16:43:07 +00:00
Chris Lattner
ca1428e01c Fix a bug in my select transformation 
llvm-svn: 12826
 2004-04-11 01:39:19 +00:00
Chris Lattner
226ea8166e Add a missing break, which caused a crash in an obscure situation 
llvm-svn: 12825
 2004-04-11 01:29:30 +00:00
Chris Lattner
777977bf2e Update the value numbering interface. 
llvm-svn: 12824
 2004-04-10 22:33:34 +00:00
Chris Lattner
96fca8de3d Implement InstCombine/select.ll:test13* 
llvm-svn: 12821
 2004-04-10 22:21:27 +00:00
Chris Lattner
618c89d5eb Implement InstCombine/add.ll:test20 
Canonicalize add of sign bit constant into a xor

llvm-svn: 12819
 2004-04-10 22:01:55 +00:00
Chris Lattner
6d569b52ed Rewrite the GCSE pass to be *substantially* simpler, a bit more efficient, 
and a bit more powerful

llvm-svn: 12817
 2004-04-10 21:11:11 +00:00
Chris Lattner
22c22de2f0 Fix spurious warning in release mode 
llvm-svn: 12816
 2004-04-10 19:15:56 +00:00
Chris Lattner
8b1122d4dc Silence a spurious warning 
llvm-svn: 12815
 2004-04-10 18:32:01 +00:00
Chris Lattner
924b6c173c Simplify code a bit, and fix a bug that was breaking perlbmk 
llvm-svn: 12814
 2004-04-10 18:06:21 +00:00
Chris Lattner
f126f03878 Fix a bug in my checkin last night that was breaking programs using invoke. 
llvm-svn: 12813
 2004-04-10 16:53:29 +00:00
Chris Lattner
d4979e2904 Fix previous patch 
llvm-svn: 12811
 2004-04-10 07:27:48 +00:00
Chris Lattner
3b211f0432 Correctly update counters 
llvm-svn: 12810
 2004-04-10 07:02:02 +00:00
Chris Lattner
474637518d Add a couple of more functions that cannot access memory (the intrinsics) and 
don't write to memory

llvm-svn: 12808
 2004-04-10 06:55:27 +00:00
Chris Lattner
1676188024 Simplify code a bit, and use alias analysis to allow us to delete unused 
call and invoke instructions that are known to not write to memory.

llvm-svn: 12807
 2004-04-10 06:53:09 +00:00
Chris Lattner
306540a2f4 Implement select.ll:test12* 
This transforms code like this:

   %C = or %A, %B
   %D = select %cond, %C, %A
into:
   %C = select %cond, %B, 0
   %D = or %A, %C

Since B is often a constant, the select can often be eliminated.  In any case,
this reduces the usage count of A, allowing subsequent optimizations to happen.

This xform applies when the operator is any of:
  add, sub, mul, or, xor, and, shl, shr

llvm-svn: 12800
 2004-04-09 23:46:01 +00:00
Chris Lattner
8ccddbd123 Fold code like: 
if (C)
    V1 |= V2;

into:
  Vx = V1 | V2;
  V1 = select C, V1, Vx

when the expression can be evaluated unconditionally and is *cheap* to
execute.  This limited form of if conversion is quite handy in lots of cases.
For example, it turns this testcase into straight-line code:

int in0 ; int in1 ; int in2 ; int in3 ;
int in4 ; int in5 ; int in6 ; int in7 ;
int in8 ; int in9 ; int in10; int in11;
int in12; int in13; int in14; int in15;
long output;

void mux(void) {
  output =
      (in0   ?  0x00000001 : 0) | (in1   ?  0x00000002 : 0) |
      (in2   ?  0x00000004 : 0) | (in3   ?  0x00000008 : 0) |
      (in4   ?  0x00000010 : 0) | (in5   ?  0x00000020 : 0) |
      (in6   ?  0x00000040 : 0) | (in7   ?  0x00000080 : 0) |
      (in8   ?  0x00000100 : 0) | (in9   ?  0x00000200 : 0) |
      (in10  ?  0x00000400 : 0) | (in11  ?  0x00000800 : 0) |
      (in12  ?  0x00001000 : 0) | (in13  ?  0x00002000 : 0) |
      (in14  ?  0x00004000 : 0) | (in15  ?  0x00008000 : 0) ;
}

llvm-svn: 12798
 2004-04-09 22:50:22 +00:00
John Criswell
c9c191c41b Reversed the order of the llvm.writeport() operands so that the value 
is listed first and the address is listed second.

llvm-svn: 12795
 2004-04-09 19:09:14 +00:00
Chris Lattner
3a6e4b9a35 Fold binary operators with a constant operand into select instructions 
that have a constant operand.  This implements
add.ll:test19, shift.ll:test15*, and others that are not tested

llvm-svn: 12794
 2004-04-09 19:05:30 +00:00
Chris Lattner
0e1f5553df Implement select.ll:test11 
llvm-svn: 12793
 2004-04-09 18:19:44 +00:00
Alkis Evlogimenos
f66a23d573 Add definition list to each live interval. 
llvm-svn: 12791
 2004-04-09 18:07:57 +00:00
John Criswell
a52a2291d8 Changed assertions to error messages. 
llvm-svn: 12787
 2004-04-09 15:10:15 +00:00
John Criswell
8740c3767d Changes recommended by Chris: 
InstSelectSimple.cpp:
  Change the checks for proper I/O port address size into an exit() instead
  of an assertion.  Assertions aren't used in Release builds, and handling
  this error should be graceful (not that this counts as graceful, but it's
  more graceful).

  Modified the generation of the IN/OUT instructions to have 0 arguments.
X86InstrInfo.td:
  Added the OpSize attribute to the 16 bit IN and OUT instructions.

llvm-svn: 12786
 2004-04-08 22:39:13 +00:00
Chris Lattner
0ca3cbfa5e Implement InstCombine/cast-propagate.ll 
llvm-svn: 12784
 2004-04-08 20:39:49 +00:00
John Criswell
f6b16ea70b Added the llvm.readport and llvm.writeport intrinsics for x86. These do 
I/O port instructions on x86.  The specific code sequence is tailored to
the parameters and return value of the intrinsic call.
Added the ability for implicit defintions to be printed in the Instruction
Printer.
Added the ability for RawFrm instruction to print implict uses and
defintions with correct comma output.  This required adjustment to some
methods so that a leading comma would or would not be printed.

llvm-svn: 12782
 2004-04-08 20:31:47 +00:00
John Criswell
07c581695d Added the llvm.readport and llvm.writeport intrinsics. 
The Verifier ensures that their parameters are of integral types and have
the correct sign, but it does not enforce any size restrictions because
such restrictions are platform dependent.

llvm-svn: 12781
 2004-04-08 20:27:38 +00:00
Chris Lattner
d8efae05fe Implement ScalarRepl/select_promote.ll 
llvm-svn: 12779
 2004-04-08 19:59:34 +00:00
Chris Lattner
77beb73ce2 Remove the "really gross hacks" that are there to deal with recursive functions. 
Now we collect all of the call sites we are interested in inlining, then inline
them.  This entirely avoids issues with trying to inline a call site we got by
inlining another call site.  This also eliminates iterator invalidation issues.

llvm-svn: 12770
 2004-04-08 06:34:31 +00:00
Chris Lattner
cf8117ccbd Implement InstCombine/select.ll:test[7-10] 
llvm-svn: 12769
 2004-04-08 04:43:23 +00:00
Brian Gaeke
bd29266df4 Don't include InstrSelectionSupport.h. 
llvm-svn: 12766
 2004-04-07 20:55:32 +00:00
Brian Gaeke
c48a77d1ba Move ChooseRegOrImmed() prototype here, from InstrSelectionSupport.h. 
llvm-svn: 12765
 2004-04-07 20:38:57 +00:00
Brian Gaeke
54245d895a Don't include InstrSelectionSupport.h. 
llvm-svn: 12764
 2004-04-07 20:38:56 +00:00
Chris Lattner
2e89e48999 Implement test/Regression/Transforms/InstCombine/getelementptr_index.ll 
llvm-svn: 12762
 2004-04-07 18:38:20 +00:00
Brian Gaeke
1193590133 Fix insertion of SelectInsts. 
llvm-svn: 12760
 2004-04-07 18:31:47 +00:00
Brian Gaeke
6badc5d83b Don't print [%reg + 0], just print [%reg] 
llvm-svn: 12759
 2004-04-07 17:33:56 +00:00
Brian Gaeke
cb5141b4de First version of code to handle loads. Stub function for handling stores. 
llvm-svn: 12758
 2004-04-07 17:29:37 +00:00
Brian Gaeke
3e29bc5a19 Support loading arguments from %I0...%I5 into virtual registers in 
function prologues, and fix an off-by-one in visitCallInst that was
putting call args into the wrong registers.

llvm-svn: 12757
 2004-04-07 17:04:09 +00:00
Brian Gaeke
3eb6c1d3ae It's setting up the call args right now, but on the callee side, it's 
trying to get incoming args off the stack, instead of the %i0...%i6 regs,
which is wrong.

llvm-svn: 12756
 2004-04-07 16:41:22 +00:00
Chris Lattner
cb6744360c Fix a bug Brian found. 
llvm-svn: 12754
 2004-04-07 16:16:11 +00:00
Chris Lattner
37a392dc52 This is a start on handling setcc instructions. As the comment notes, we 
have no good way of handling this until the code generator is improved.
We should probably just emit V9 instructions in the meantime.

llvm-svn: 12745
 2004-04-07 05:04:51 +00:00
Chris Lattner
bb67452b4b andd subcc instructions which is used to create the 'cmp' pseudo instruction 
llvm-svn: 12744
 2004-04-07 05:04:01 +00:00
Chris Lattner
2f63fbf9d5 Avoid emitting an extra copy on each 32-bit operation 
llvm-svn: 12743
 2004-04-07 04:36:53 +00:00
Brian Gaeke
d98edc771e Make generation of stack-slot loads and copies less ugly. 
llvm-svn: 12742
 2004-04-07 04:29:14 +00:00
Brian Gaeke
90c53bcbda Fix bug in printing loads. 
llvm-svn: 12741
 2004-04-07 04:29:03 +00:00
Chris Lattner
be45dbdaf8 Add support for shift instructions, wrap some long lines 
llvm-svn: 12740
 2004-04-07 04:27:16 +00:00
Chris Lattner
ded6e64b53 Fix encoding of existing shift instructions, add rr shifts 
llvm-svn: 12739
 2004-04-07 04:26:57 +00:00
Chris Lattner
13546cb380 Add a bunch more instructions 
llvm-svn: 12737
 2004-04-07 04:06:46 +00:00
Chris Lattner
a58da750eb Merge my changes with brians 
llvm-svn: 12736
 2004-04-07 04:05:49 +00:00
Brian Gaeke
ece16e53c4 Add in some things I forgot, which Chris helpfully reminded me of... 
llvm-svn: 12735
 2004-04-07 04:05:12 +00:00
Brian Gaeke
4b90f62e6d Add support for the "Y" register, used by MUL & DIV. 
llvm-svn: 12734
 2004-04-07 04:01:11 +00:00