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Author SHA1 Message Date
Chris Lattner
56680711dc Indent .data/.text in the .s file 
llvm-svn: 28204
 2006-05-09 16:15:00 +00:00
Evan Cheng
0f8516a3e0 Another instruction scheduling test case 
llvm-svn: 28203
 2006-05-09 07:20:24 +00:00
Evan Cheng
1a8feb189e Add pseudo dependency to force a def&use operand to be scheduled last (unless 
the distance between the def and another use is much longer). This is under
option control for now "-sched-lower-defnuse".

llvm-svn: 28201
 2006-05-09 07:13:34 +00:00
Evan Cheng
3f72d2121b Debugging info 
llvm-svn: 28200
 2006-05-09 06:55:15 +00:00
Evan Cheng
1f5c530d04 Remove a completed entry. 
llvm-svn: 28199
 2006-05-09 06:54:05 +00:00
Evan Cheng
02e8d5f2d6 Test case for PR770 
llvm-svn: 28198
 2006-05-09 06:48:12 +00:00
Evan Cheng
aad3fe008e PR 770 - permit coallescing of registers in subset register classes. 
llvm-svn: 28197
 2006-05-09 06:37:48 +00:00
Evan Cheng
e989b1534a Added sub- register classes information. 
llvm-svn: 28196
 2006-05-09 06:35:30 +00:00
Evan Cheng
87b66b9aec Add sub-register class information. 
llvm-svn: 28195
 2006-05-09 06:34:26 +00:00
Chris Lattner
b7152b0b42 Implement MASM sections correctly, without a "has masm sections flag" and a bunch of special case code. 
llvm-svn: 28194
 2006-05-09 05:33:48 +00:00
Chris Lattner
9669e5ece6 Implement MASM sections correctly, without a "has masm sections flag" and a 
bunch of special case code.

llvm-svn: 28193
 2006-05-09 05:33:28 +00:00
Chris Lattner
28fe830b3b Oh yeah, there are two of these now, unify both. 
llvm-svn: 28192
 2006-05-09 05:24:50 +00:00
Chris Lattner
d2aea9851e Setting SwitchToSectionDirective properly in the MASM backend permits a bunch 
of code to be unified.

llvm-svn: 28191
 2006-05-09 05:23:12 +00:00
Chris Lattner
85032c8c5c MASM doesn't have one of these. 
llvm-svn: 28190
 2006-05-09 05:21:47 +00:00
Chris Lattner
830bed591e Don't prefix section directives with a tab. Doing so causes blank lines to 
be emitted to the .s file.

llvm-svn: 28189
 2006-05-09 05:19:59 +00:00
Chris Lattner
baefeb1e09 Make the masm codepath work like the normal code path. 
llvm-svn: 28188
 2006-05-09 05:15:58 +00:00
Chris Lattner
8301da3ffe Preserve prior behavior 
llvm-svn: 28187
 2006-05-09 05:15:24 +00:00
Chris Lattner
6ede576b55 The MASM asmprinter has been fixed, these hacks are no longer needed. 
llvm-svn: 28186
 2006-05-09 05:13:34 +00:00
Chris Lattner
0c4a1e56f4 Fix the MASM asmprinter's lies. It does not want to emit code to .text/.data 
it wants it emitted to _text/_data.

llvm-svn: 28185
 2006-05-09 05:12:53 +00:00
Chris Lattner
f45b6d5c08 Split SwitchSection into SwitchTo{Text|Data}Section methods. 
llvm-svn: 28184
 2006-05-09 04:59:56 +00:00
Chris Lattner
a5f13d3120 Split SwitchSection into the SwitchTo{Text|Data}Section functions, to better 
support assemblers that distinguish the two.

llvm-svn: 28183
 2006-05-09 04:59:30 +00:00
Chris Lattner
71c68064f9 Some notes and thoughts to myself 
llvm-svn: 28182
 2006-05-09 04:58:46 +00:00
Chris Lattner
f49a22d601 Patch to make some xforms preserve each other. Patch contributed by 
Domagoj Babic!

llvm-svn: 28181
 2006-05-09 04:13:41 +00:00
Reid Spencer
9e06c1b17f Use the -dumpversion option to llvm-gcc which gives us just the version # 
and is unlikely to change in future releases. This also simplifies the
parsing of the full and major llvm-gcc version numbers in the script.

llvm-svn: 28180
 2006-05-09 00:31:01 +00:00
Chris Lattner
6e58d3a317 Move some methods out of line so that MutexGuard.h isn't needed in a public header. 
llvm-svn: 28179
 2006-05-08 22:00:52 +00:00
Chris Lattner
2a1973c8c2 Move methods out of line so that MutexGuard.h isn't required in the header. 
llvm-svn: 28178
 2006-05-08 22:00:26 +00:00
Chris Lattner
5609ba71a5 Another bad case I noticed 
llvm-svn: 28177
 2006-05-08 21:39:45 +00:00
Chris Lattner
4f3345f1f1 add a note 
llvm-svn: 28176
 2006-05-08 21:24:21 +00:00
Chris Lattner
eed10e837c Make the case I just checked in stronger. Now we compile this: 
short test2(short X, short x) {
  int Y = (short)(X+x);
  return Y >> 1;
}

to:

_test2:
        add r2, r3, r4
        extsh r2, r2
        srawi r3, r2, 1
        blr

instead of:

_test2:
        add r2, r3, r4
        extsh r2, r2
        srwi r2, r2, 1
        extsh r3, r2
        blr

llvm-svn: 28175
 2006-05-08 21:18:59 +00:00
Chris Lattner
7b8a0cfff3 Implement and_sext.ll:test3, generating: 
_test4:
        srawi r3, r3, 16
        blr

instead of:

_test4:
        srwi r2, r3, 16
        extsh r3, r2
        blr

for:

short test4(unsigned X) {
  return (X >> 16);
}

llvm-svn: 28174
 2006-05-08 20:59:41 +00:00
Chris Lattner
4d8e0c2a55 new testcase 
llvm-svn: 28173
 2006-05-08 20:58:58 +00:00
Nate Begeman
db854c6772 Yet more readme updating 
llvm-svn: 28172
 2006-05-08 20:54:02 +00:00
Chris Lattner
4f66de151c Compile this: 
short test4(unsigned X) {
  return (X >> 16);
}

to:

_test4:
        movl 4(%esp), %eax
        sarl $16, %eax
        ret

instead of:

_test4:
        movl $-65536, %eax
        andl 4(%esp), %eax
        sarl $16, %eax
        ret

llvm-svn: 28171
 2006-05-08 20:51:54 +00:00
Nate Begeman
1ff4d8f2fe New note about something bad happening in target independent optimizers 
llvm-svn: 28170
 2006-05-08 20:08:28 +00:00
Nate Begeman
b8fa6337df Proving once again that I am not as smart as the compiler 
llvm-svn: 28169
 2006-05-08 19:09:24 +00:00
Nate Begeman
a706539a72 Fold more shifts into inserts, and update the README 
llvm-svn: 28168
 2006-05-08 17:38:32 +00:00
Chris Lattner
bbe4393bc4 Fold shifts with undef operands. 
llvm-svn: 28167
 2006-05-08 17:29:49 +00:00
Chris Lattner
6cac867da1 When tracking demanded bits, if any bits from the sext of an SRA are demanded, 
then so is the input sign bit.  This fixes mediabench/g721 on X86.

llvm-svn: 28166
 2006-05-08 17:22:53 +00:00
Nate Begeman
1f359b07de Make emission of jump tables a bit less conservative; they are now required 
to be only 31.25% dense, rather than 75% dense.

llvm-svn: 28165
 2006-05-08 16:51:36 +00:00
Evan Cheng
0fb3fc3626 Fixing truncate. Previously we were emitting truncate from r16 to r8 as 
movw. That is we promote the destination operand to r16. So
        %CH = TRUNC_R16_R8 %BP
is emitted as
        movw %bp, %cx.

This is incorrect. If %cl is live, it would be clobbered.
Ideally we want to do the opposite, that is emitted it as
        movb ??, %ch
But this is not possible since %bp does not have a r8 sub-register.

We are now defining a new register class R16_ which is a subclass of R16
containing only those 16-bit registers that have r8 sub-registers (i.e.
AX - DX). We isel the truncate to two instructions, a MOV16to16_ to copy the
value to the R16_ class, followed by a TRUNC_R16_R8.

Due to bug 770, the register colaescer is not going to coalesce between R16 and
R16_. That will be fixed later so we can eliminate the MOV16to16_. Right now, it
can only be eliminated if we are lucky that source and destination registers are
the same.

llvm-svn: 28164
 2006-05-08 08:01:26 +00:00
Chris Lattner
c1736fdce0 Move the definition of value_use_iterator::getOperandNo to User.h where the 
definition of the User class is available, this fixes the  build with some
compiler versions.

llvm-svn: 28163
 2006-05-08 05:59:36 +00:00
Nate Begeman
591488077e Update some stuff now that the new rlwimi code has gone in 
llvm-svn: 28162
 2006-05-08 02:52:38 +00:00
Nate Begeman
b8e351aec5 Fix PR772 
llvm-svn: 28161
 2006-05-08 01:35:01 +00:00
Nate Begeman
c5a92246bc Remove unncessary include 
llvm-svn: 28160
 2006-05-08 01:33:11 +00:00
Chris Lattner
0da270237b This test passes now, remove xfail marker 
Change test to be a positive test instead of a negative test

llvm-svn: 28159
 2006-05-07 18:16:31 +00:00
Evan Cheng
698b0517b5 Typo's 
llvm-svn: 28158
 2006-05-07 10:10:20 +00:00
Jeff Cohen
44ece070c7 Unlike Unix, Windows won't let a file be implicitly replaced via renaming without explicit permission. 
llvm-svn: 28157
 2006-05-07 02:51:51 +00:00
Nate Begeman
dc94b738d0 New rlwimi implementation, which is superior to the old one. There are 
still a couple missed optimizations, but we now generate all the possible
rlwimis for multiple inserts into the same bitfield.  More regression tests
to come.

llvm-svn: 28156
 2006-05-07 00:23:38 +00:00
Chris Lattner
5c9c9f0eb6 Use ComputeMaskedBits to determine # sign bits as a fallback. This allows us 
to handle all kinds of stuff, including silly things like:
sextinreg(setcc,i16) -> setcc.

llvm-svn: 28155
 2006-05-06 23:48:13 +00:00
Chris Lattner
8b8093dea2 Add some more sign propagation cases 
llvm-svn: 28154
 2006-05-06 23:40:29 +00:00