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644 Commits

Author SHA1 Message Date
Chris Lattner
5815669251 Teach the dag selectors to select InlineAsm nodes. 
Aren't we happy the pattern selectors are almost all gone?

llvm-svn: 25666
 2006-01-26 23:08:55 +00:00
Evan Cheng
e9025f1f3b Another folding problem: if a node r/w chain or flag, don't fold it if it 
has already been selected. The number of use check is not strong enough since
a node can be replaced with newly created target node. e.g. If the original
node has two uses, when it is selected for one of the uses it is replaced with
another. Each node now has a single use but isel still should not fold it.

llvm-svn: 25651
 2006-01-26 19:13:45 +00:00
Evan Cheng
dc8365d4f3 Add a FIXME comment. 
llvm-svn: 25635
 2006-01-26 02:13:31 +00:00
Evan Cheng
ecfaa0a1c9 Incoming (and optional) flag bugs. They may be embedded inside a inner node of 
a pattern. Also, nodes which take incoming flag should not be folded if it has
more than one use.

llvm-svn: 25627
 2006-01-26 00:22:25 +00:00
Evan Cheng
c5c228fa59 Fix an optional in flag bug. 
llvm-svn: 25590
 2006-01-24 20:46:50 +00:00
Evan Cheng
295e196558 Optional InFlag was not being included in node. 
llvm-svn: 25588
 2006-01-24 20:07:38 +00:00
Evan Cheng
e272b4ec17 Prevent folding of a node with multiple uses if the node already folds a load! 
Here is an example where the load ended up being done twice:

%A = global uint 0

uint %test(uint %B, ubyte %C) {
	%tmp = load uint *%A;
	%X = shl uint %tmp, ubyte %C
	%Cv = sub ubyte 32, %C
	%Y = shr uint %B, ubyte %Cv
	%Z = or uint %Y, %X
	store uint %Z, uint* %A
	ret uint %Z
}

==>

	subl $4, %esp
	movl %ebx, (%esp)
	movl 8(%esp), %edx
	movl A, %eax
	movb 12(%esp), %bl
	movb %bl, %cl
	shldl %cl, %edx, %eax
	movb %bl, %cl
	shldl %cl, %edx, A
	movl (%esp), %ebx
	addl $4, %esp
	ret

llvm-svn: 25471
 2006-01-20 01:11:03 +00:00
Evan Cheng
9e7fb7b2fc Bug fix. Flag operand number may be calculated incorrectly. 
llvm-svn: 25465
 2006-01-19 21:57:10 +00:00
Evan Cheng
a15731cd50 Use pattern information to determine whether the use expects this 
instruction to produce a result. e.g MUL8m, the instruction does not
produce a explicit result. However it produces an implicit result in
AL which would be copied to a temp. The root operator of the matching
pattern is a mul so the use would expect it to produce a result.

llvm-svn: 25458
 2006-01-19 10:12:58 +00:00
Evan Cheng
acec02ebf5 Prevent unnecessary CopyToReg when the same HW register appears in two spots 
in the pattern.

llvm-svn: 25437
 2006-01-19 01:55:45 +00:00
Chris Lattner
dce31c8d70 fix a broken comment 
llvm-svn: 25411
 2006-01-17 21:31:18 +00:00
John Criswell
5ed803256d Regenerated the Lex and Yacc output files on Linux. It seems that our 
Linux machines don't like the source code generated on MacOS X for some
reason.

llvm-svn: 25394
 2006-01-17 17:01:34 +00:00
Evan Cheng
61864ec3fe Emit a type matching check for ComplexPatterns. 
llvm-svn: 25392
 2006-01-17 07:36:41 +00:00
Evan Cheng
a039d439dc Type inferencing bug 
llvm-svn: 25337
 2006-01-15 10:04:45 +00:00
Evan Cheng
bd1de84121 Allow transformation from GlobalAddress to TargetGlobalAddress and 
ExternalSymbol to TargetExternalSymbol.

llvm-svn: 25252
 2006-01-12 19:35:54 +00:00
Evan Cheng
e6300aaabc GlobalAddress -> TargetGlobalAddress; ExternalSymbol -> TargetExternalSymbol 
llvm-svn: 25245
 2006-01-12 07:54:57 +00:00
Evan Cheng
31686087cd Some minor fixes. 
llvm-svn: 25227
 2006-01-11 22:16:13 +00:00
Chris Lattner
e18ad392d3 Always select target registers to themselves 
llvm-svn: 25218
 2006-01-11 19:52:27 +00:00
Chris Lattner
3857f6d067 Emit an error instead of an assertion if trying to do bogus things in result patterns. 
llvm-svn: 25194
 2006-01-11 01:33:49 +00:00
Robert Bocchino
230044839d Added support for the extractelement operation. 
llvm-svn: 25181
 2006-01-10 19:05:34 +00:00
Evan Cheng
4b0623e141 * Remove instruction fields hasInFlag / hasOutFlag and added SNDPInFlag and 
SNDPOutFlag to DAG nodes. These properties do not belong to target specific
instructions.
* Added DAG node property SNDPOptInFlag. It's same as SNDPInFlag except it's
optional. Used by ret / call, etc.

llvm-svn: 25154
 2006-01-09 18:27:06 +00:00
Evan Cheng
482ef91d26 Pattern complexity calculation fix. 
llvm-svn: 25133
 2006-01-06 22:19:44 +00:00
Evan Cheng
46634d21e3 Tweak pattern complexity calc. 
llvm-svn: 25122
 2006-01-06 02:30:23 +00:00
Evan Cheng
6b037909ff Bug fix wrt chain operand. 
llvm-svn: 25115
 2006-01-06 00:41:12 +00:00
Jeff Cohen
a69bb989f1 Replace fix with one less disruptive to the original code. 
Also note that GCC 4.1 also correctly flags the syntax error.

llvm-svn: 25076
 2006-01-04 03:23:30 +00:00
Jeff Cohen
7d17a6bc86 Tblgen was generating syntactically illegal C++ code like: 
SDOperand Tmp0,Tmp1,Tmp2,Tmp3,;

GCC has a bug (24907) in which is fails to catch this, but VC++ correctly
notes its illegality, so tblgen must be taught to only generate legal C++.

llvm-svn: 25075
 2006-01-04 03:15:19 +00:00
Chris Lattner
3d38031bef Remove obsolete comment, make things look a bit nicer 
llvm-svn: 25070
 2006-01-04 00:32:01 +00:00
Chris Lattner
c29793a077 reduce stack usage of the recursive SelectCode function by out-lining each 
case of the switch statement into its own method.

llvm-svn: 25069
 2006-01-04 00:25:00 +00:00
Chris Lattner
81e4dbc6a1 Remove my previous ugly hack that tries to reduce the stack space usage 
of SelectCode to make way for a better solution.

llvm-svn: 25068
 2006-01-03 22:55:16 +00:00
Duraid Madina
def44bec82 HP-UX DVDs are crunchy and good to eat 
llvm-svn: 25052
 2005-12-30 16:41:48 +00:00
Duraid Madina
018da4f5ef almost got the HP-UX tester up.. :) 
llvm-svn: 25051
 2005-12-30 14:56:37 +00:00
Nate Begeman
336dba6fb1 Add support for generating v4i32 altivec code 
llvm-svn: 25046
 2005-12-30 00:12:56 +00:00
Duraid Madina
ccb1aebcd3 This gets most of the backends building with HP HappyC++. 
llvm-svn: 25029
 2005-12-27 10:56:22 +00:00
Evan Cheng
14c53b45f5 Added field noResults to Instruction. 
Currently tblgen cannot tell which operands in the operand list are results so
it assumes the first one is a result. This is bad. Ideally we would fix this
by separating results from inputs, e.g. (res R32:$dst),
(ops R32:$src1, R32:$src2). But that's a more distruptive change. Adding
'let noResults = 1' is the workaround to tell tblgen that the instruction does
not produces a result. It works for now since tblgen does not support
instructions which produce multiple results.

llvm-svn: 25017
 2005-12-26 09:11:45 +00:00
Duraid Madina
14492afc23 more standards-compliance stuff 
llvm-svn: 25014
 2005-12-26 05:08:55 +00:00
Andrew Lenharth
0dc12c38e5 support targetexternalsym 
llvm-svn: 25005
 2005-12-24 23:36:59 +00:00
Evan Cheng
72aaf8e374 * Support for hasInFlag and hasOutFlag (on instructions). Remove nameless FLAG 
support which is fragile.
* Fixed a number of bugs.

llvm-svn: 24996
 2005-12-23 22:11:47 +00:00
Chris Lattner
d834d495b2 silence some bogus gcc warnings 
llvm-svn: 24962
 2005-12-22 20:37:36 +00:00
Evan Cheng
a87d743912 Attempt to fix a crash on WIN32. 
llvm-svn: 24936
 2005-12-22 02:35:21 +00:00
Evan Cheng
991bc6d6ba * Added support for FLAG - a special nameless flag register. Can be used as 
either an operand or a result.
* Fixed some more flag / chain bugs.

llvm-svn: 24933
 2005-12-22 02:24:50 +00:00
Evan Cheng
f646926ecf Allows instructions which no explicit operands. e.g. X86 RET which has but 
an implicit flag operand.

llvm-svn: 24916
 2005-12-21 20:20:49 +00:00
Chris Lattner
812a56e888 Eliminate some GCC warnings from the generated code 
llvm-svn: 24897
 2005-12-21 05:31:05 +00:00
Evan Cheng
4bf64a8ba4 Fix the semantic of Requires<[cond]> to mean if (!cond) goto PXXFail; 
llvm-svn: 24883
 2005-12-20 20:08:01 +00:00
Chris Lattner
777bb6eb45 This ugly patch works around a GCC bug where it is compiling SelectCode to 
use too much stack space, overflowing the stack for large functions.  Instead
of emitting new SDOperands in each match block, we emit some common ones at
the top of SelectCode then reuse them when possible.

This reduces the stack size of SelectCode from 28K to 21K.  Note that GCC
compiles it to 512 bytes :-/

I've filed GCC PR 25505 to track this.

llvm-svn: 24882
 2005-12-20 19:41:03 +00:00
Evan Cheng
9696f63d3e Now support instructions with implicit write to non-flag registers. 
llvm-svn: 24878
 2005-12-20 07:37:41 +00:00
Evan Cheng
fe90b604a4 Lefted out a fix in the previous check in. 
llvm-svn: 24873
 2005-12-20 00:06:17 +00:00
Evan Cheng
19b9f15377 Fix another bug related to chain / flag. 
llvm-svn: 24868
 2005-12-19 22:40:04 +00:00
Evan Cheng
9bd85c2f19 Fixes for a number of bugs: save flag results in CodeGenMap, folded chains 
may not all have ResNo == 0.

llvm-svn: 24858
 2005-12-19 07:18:51 +00:00
Chris Lattner
f7ae0a95fe Handle basic block nodes 
llvm-svn: 24833
 2005-12-18 21:05:44 +00:00
Chris Lattner
abb11cc83e More fixes for Selection of copyto/fromreg with a flag 
llvm-svn: 24829
 2005-12-18 15:45:51 +00:00