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Author SHA1 Message Date
Jeff Cohen
a57cef0ed9 Visual Studio enters the future of bisoning. 
llvm-svn: 26227
 2006-02-16 04:07:03 +00:00
Evan Cheng
74228303ad Use movaps / movapd (instead of movss / movsd) to do FR32 / FR64 reg to reg 
transfer.

According to the Intel P4 Optimization Manual:

Moves that write a portion of a register can introduce unwanted
dependences. The movsd reg, reg instruction writes only the bottom
64 bits of a register, not to all 128 bits. This introduces a dependence on
the preceding instruction that produces the upper 64 bits (even if those
bits are not longer wanted). The dependence inhibits register renaming,
and thereby reduces parallelism.

Not to mention movaps is shorter than movss.

llvm-svn: 26226
 2006-02-16 01:50:02 +00:00
Chris Lattner
57142c7e12 fix a bug where we unswitched the wrong way 
llvm-svn: 26225
 2006-02-16 01:24:41 +00:00
Evan Cheng
2f3056286a A bit more memset / memcpy optimization. 
Turns them into calls to memset / memcpy if 1) buffer(s) are not DWORD aligned,
2) size is not known to be greater or equal to some minimum value (currently 128).

llvm-svn: 26224
 2006-02-16 00:21:07 +00:00
Chris Lattner
0a6283e1c2 Implement trivial unswitching for switch stmts. This allows us to trivial 
unswitch this loop on 2 before sweating to unswitch on 1/3.

void test4(int N, int i, int C, int*P, int*Q) {
  int j;
  for (j = 0; j < N; ++j) {
    switch (C) {                // general unswitching.
    default: P[i+j] = 0; break;
    case 1: Q[i+j] = 0; break;
    case 3: P[i+j] = Q[i+j]; break;
    case 2: break;              //  TRIVIAL UNSWITCH on C==2
    }
  }
}

llvm-svn: 26223
 2006-02-15 22:52:05 +00:00
Evan Cheng
93b4f4fa67 Remove an entry. 
llvm-svn: 26222
 2006-02-15 22:14:34 +00:00
Evan Cheng
07063456aa Remove an unused function parameter. 
llvm-svn: 26221
 2006-02-15 22:12:35 +00:00
Chris Lattner
4b996ebd5e make "trivial" unswitching significantly more general. It can now handle 
this for example:

  for (j = 0; j < N; ++j) {     // trivial unswitch
    if (C)
      P[i+j] = 0;
  }

turning it into the obvious code without bothering to duplicate an empty loop.

llvm-svn: 26220
 2006-02-15 22:03:36 +00:00
Evan Cheng
5c2ecfd29b Turn a memcpy from string constant into a series of stores of constant values. 
llvm-svn: 26219
 2006-02-15 21:59:04 +00:00
Andrew Lenharth
f66fde7b14 fix a bunch of alpha regressions. see bug 709 
llvm-svn: 26218
 2006-02-15 21:13:37 +00:00
Chris Lattner
d720ec9449 new test 
llvm-svn: 26217
 2006-02-15 19:52:06 +00:00
Jim Laskey
e51152ac31 Should not combine ISD::LOCATIONs until we have scheme to remove from 
MachineDebugInfo tables.

llvm-svn: 26216
 2006-02-15 19:34:44 +00:00
Chris Lattner
9268890212 Checking the wrong value. This caused us to emit silly code like 
Y = seteq bool X, true
instead of just using X :)

llvm-svn: 26215
 2006-02-15 19:05:52 +00:00
Jim Laskey
517f94f3b0 Code sufficiently protected against this test. 
llvm-svn: 26213
 2006-02-15 17:20:59 +00:00
Duraid Madina
b510fdd272 reverting previous change, will add support for other compilers later 
llvm-svn: 26211
 2006-02-15 07:57:42 +00:00
Chris Lattner
0ebae20ee1 Convert over to the new way of handling lex/bison checked into cvs 
llvm-svn: 26209
 2006-02-15 07:26:07 +00:00
Chris Lattner
0974ebab7b Check the new form for bison output into CVS 
llvm-svn: 26208
 2006-02-15 07:24:01 +00:00
Chris Lattner
6021652731 bugfixes 
llvm-svn: 26207
 2006-02-15 07:23:05 +00:00
Chris Lattner
ed07ecc5e3 Convert this over to work with the new makefiles 
llvm-svn: 26206
 2006-02-15 07:22:58 +00:00
Chris Lattner
09ab966d37 Convert the bison-output-checked-into-cvs makefile handling stuff to work 
like the flex stuff, which actually works when people do cvs updates and
get conflicts in the updated checked in file.

llvm-svn: 26205
 2006-02-15 07:16:57 +00:00
Chris Lattner
e75debf037 Sparc actually *DOES* have a directive for emitting zeros. In fact, it requires 
it, because this:

.bss
X:
.byte 0

results in the assembler warning: "initialization in bss segment".  Annoying.

llvm-svn: 26204
 2006-02-15 07:07:14 +00:00
Chris Lattner
0d816868f8 random lexer change to test the makefile updating stuff 
llvm-svn: 26203
 2006-02-15 07:02:59 +00:00
Chris Lattner
8e7f48c96d Fix SingleSource/Regression/C/2004-08-12-InlinerAndAllocas.c on Sparc. 
The ABI specifies that there is a register save area at the bottom of the
stack, which means the actual used pointer needs to be an offset from
the subtracted value.

llvm-svn: 26202
 2006-02-15 06:41:34 +00:00
Duraid Madina
bdcf945194 HP aCC (and a bunch of other compilers, no doubt) don't share 
GCC's syntax for auto-dependency generation stuff. This should
be changed to be disabling dependency stuff unless GCC/ICC is
found.

llvm-svn: 26201
 2006-02-15 03:23:26 +00:00
Duraid Madina
93f4da03e5 oops, I meant this 
llvm-svn: 26200
 2006-02-15 03:20:16 +00:00
Duraid Madina
97b493eb7d zap 
llvm-svn: 26199
 2006-02-15 03:16:52 +00:00
Duraid Madina
4c6740419b previously, configure would die if GCC or ICC was not found. Now it'll 
go through, but we do want to know if we're using GCC/ICC since they
share certain funky command line options (for dependency generation
stuff)

llvm-svn: 26198
 2006-02-15 03:15:55 +00:00
Evan Cheng
53c574c6fa Remove an entry. 
llvm-svn: 26197
 2006-02-15 01:56:48 +00:00
Evan Cheng
6501c0cfc0 Use .zerofill on x86/darwin. 
llvm-svn: 26196
 2006-02-15 01:56:23 +00:00
Evan Cheng
3f9201ab48 Lower memcpy with small constant size operand into a series of load / store 
ops.

llvm-svn: 26195
 2006-02-15 01:54:51 +00:00
Chris Lattner
a71a9897e0 more refactoring, no functionality change. 
llvm-svn: 26194
 2006-02-15 01:44:42 +00:00
Evan Cheng
da095e61c1 cvtsd2ss / cvtss2sd encoding bug. 
llvm-svn: 26193
 2006-02-15 00:31:03 +00:00
Evan Cheng
198d9447d6 movaps, movapd encoding bug. 
llvm-svn: 26192
 2006-02-15 00:11:37 +00:00
Chris Lattner
456e164ccb pull some code out into a function 
llvm-svn: 26191
 2006-02-15 00:07:43 +00:00
Chris Lattner
84cf35da87 new testcase that broke unswitch due to loopsimplify not doing the right thing. 
llvm-svn: 26190
 2006-02-14 23:07:29 +00:00
Chris Lattner
99b81c856f Canonicalize inner loops before outer loops. Inner loop canonicalization 
can provide work for the outer loop to canonicalize.

This fixes a case that breaks unswitching.

llvm-svn: 26189
 2006-02-14 23:06:02 +00:00
Evan Cheng
6789a748ac Doh again! 
llvm-svn: 26188
 2006-02-14 23:05:54 +00:00
Chris Lattner
277e76337e When splitting exit edges to canonicalize loops, make sure to put the new 
block in the appropriate loop nest.

Third time is the charm, right?

llvm-svn: 26187
 2006-02-14 22:34:08 +00:00
Chris Lattner
17226f6adc new note 
llvm-svn: 26186
 2006-02-14 22:19:54 +00:00
Chris Lattner
af26f481e9 If we have zero initialized data with external linkage, use .zerofill to 
emit it (instead of .space), saving a bit of space in the .o file.

For example:
int foo[100];
int bar[100] = {};

when compiled with C++ or -fno-common results in shrinkage from 1160 to 360
bytes of space.  The X86 backend can also do this on darwin.

llvm-svn: 26185
 2006-02-14 22:18:23 +00:00
Jim Laskey
bb6d481323 Using wrong DW_FORM. 
llvm-svn: 26184
 2006-02-14 22:01:57 +00:00
Evan Cheng
be93477b3a Don't special case XS, XD prefixes. 
llvm-svn: 26183
 2006-02-14 21:52:51 +00:00
Evan Cheng
9fd77e0a2d Bug fix: XS, XD prefixes were being emitted twice. 
XMM registers were not being handled.

llvm-svn: 26182
 2006-02-14 21:45:24 +00:00
Chris Lattner
02f3db9781 Make sure that weak functions are aligned properly 
llvm-svn: 26181
 2006-02-14 20:42:33 +00:00
Evan Cheng
26c6d7609c Duh 
llvm-svn: 26180
 2006-02-14 20:37:37 +00:00
Evan Cheng
1c09cac907 Remove -disable-x86-sse 
llvm-svn: 26179
 2006-02-14 20:30:14 +00:00
Chris Lattner
f5f9a68dec add an assert 
llvm-svn: 26178
 2006-02-14 20:14:17 +00:00
Evan Cheng
5a2a9d3896 Keep to < 80 cols 
llvm-svn: 26177
 2006-02-14 20:12:38 +00:00
Evan Cheng
8937c047b3 Missed a break so memcpy cases fell through to memset. Doh. 
llvm-svn: 26176
 2006-02-14 19:45:56 +00:00
Evan Cheng
57eebe8ab4 Fixed a build breakage. 
llvm-svn: 26175
 2006-02-14 09:11:59 +00:00