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Author SHA1 Message Date
Chris Lattner
d84d3501c6 Fix a bug handling globals that are constants, but are still external 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12208 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 03:52:24 +00:00
Chris Lattner
9b3c702614 Avoid allocating special registers a bit more robustly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12207 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 03:48:07 +00:00
Chris Lattner
e0fa368f22 New code-quality testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12205 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 02:12:36 +00:00
Chris Lattner
7dee5daf85 Implement folding explicit load instructions into binary operations. For a 
testcase like this:

int %test(int* %P, int %A) {
        %Pv = load int* %P
        %B = add int %A, %Pv
        ret int %B
}

We now generate:
test:
        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP + 8]
        add %EAX, DWORD PTR [%ECX]
        ret

Instead of:
test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %EAX, DWORD PTR [%EAX]
        add %EAX, %ECX
        ret

... saving one instruction, and often a register.  Note that there are a lot
of other instructions that could use this, but they aren't handled.  I'm not
really interested in adding them, but mul/div and all of the FP instructions
could be supported as well if someone wanted to add them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12204 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 01:58:35 +00:00
Chris Lattner
721d2d4a6e Rearrange and refactor some code. No functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12203 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 01:18:36 +00:00
Chris Lattner
9440db8866 Implement ArgumentPromotion/aggregate-promote.ll 
This allows pointers to aggregate objects, whose elements are only read, to
be promoted and passed in by element instead of by reference.  This can
enable a LOT of subsequent optimizations in the caller function.

It's worth pointing out that this stuff happens a LOT of C++ programs, because
objects in templates are generally passed around by reference.  When these
templates are instantiated on small aggregate or scalar types, however, it is
more efficient to pass them in by value than by reference.

This transformation triggers most on C++ codes (e.g. 334 times on eon), but
does happen on C codes as well.  For example, on mesa it triggers 72 times,
and on gcc it triggers 35 times.  this is amazingly good considering that
we are using 'basicaa' so far.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12202 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 01:04:36 +00:00
Chris Lattner
95481b1d06 New testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12201 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-08 00:58:19 +00:00
Chris Lattner
86a734bd40 Implement: ArgumentPromotion/chained.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12200 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 22:52:53 +00:00
Chris Lattner
afa38575aa New testcase for missed case 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12199 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 22:52:41 +00:00
Chris Lattner
7db5a6df78 Fix another minor bug, exposed by perlbmk 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12198 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 22:43:27 +00:00
Chris Lattner
c76d80342e Since 'load null' is undefined, we can make it do whatever we want. Returning 
a zero value is the most likely way to cause further simplification, so we do it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12197 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 22:16:24 +00:00
Chris Lattner
f8338c4375 Run the new pass in gccld now that it passes all tests 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12196 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 22:12:40 +00:00
Chris Lattner
7e6f5090af Fix a minor bug and turn debug output into, well, debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12195 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 21:54:50 +00:00
Chris Lattner
f0b6070272 Add prototype 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12194 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 21:30:08 +00:00
Chris Lattner
ed570a7dca New LLVM pass: argument promotion. This version only handles simple scalar 
variables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12193 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 21:29:54 +00:00
Chris Lattner
b9f266a609 New testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12192 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 21:28:54 +00:00
Alkis Evlogimenos
13d362f310 Add memory operand version of conditional move. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12190 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-07 03:19:11 +00:00
Alkis Evlogimenos
5ae00066c6 As I wrote in the docs, simple is the default spiller :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12189 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 23:08:44 +00:00
Alkis Evlogimenos
499b2bad27 Add simple spiller. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12188 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 22:38:29 +00:00
Alkis Evlogimenos
4e644dd2c2 The default register allocator is local not simple. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12187 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 22:27:41 +00:00
Brian Gaeke
08f64c3321 Support return values of basic integer types. 
Emit RETL instruction to return instead of funny JMPL.
Fix indentation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12186 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 05:32:28 +00:00
Brian Gaeke
a8056fabeb Sort stanzas into Sparc V8 book page number order. 
Add RET, RETL.  Rename SAVE, RESTORE & JMPL for consistency.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12185 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 05:32:13 +00:00
Brian Gaeke
bda4a3c61a Hack it so we do not try to allocate values to G0. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12184 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 05:31:32 +00:00
Brian Gaeke
d69b3c58d3 Make prolog align stack properly. Make epilog not touch any registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12183 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 05:31:21 +00:00
Brian Gaeke
a8b00cafc4 Emit register names in lowercase, as required by the assembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12182 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 05:30:21 +00:00
Brian Gaeke
a98e051417 Teach getRegClassForType where to find FP registers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12180 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 03:54:13 +00:00
Chris Lattner
deb8712b49 Fix a minor bug 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12169 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-05 22:04:07 +00:00
Misha Brukman
a5f2905c71 Unbreak the build on Sparc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12161 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-05 20:04:40 +00:00
Brian Gaeke
62aa28aef3 Asm output is looking a lot better; not correct for all operands yet though. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12143 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-05 08:39:09 +00:00
Chris Lattner
4ab483c6ad Fix a bug in a previous checkin that broke 175.vpr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12128 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 21:36:57 +00:00
Chris Lattner
3aeb40cadb Add support for strto* and v*printf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12127 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 21:03:54 +00:00
Chris Lattner
6b3e3ccf73 Add non-crappy support for varargs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12126 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 20:33:47 +00:00
Chris Lattner
e6e93ccd0c Implement a FIXME, improving the efficiency of DSA on povray. 
This reduces CBU time from 145s -> 122s (debug build), reduces # allocated nodes
from 129420 to 116477.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12125 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 19:47:04 +00:00
Brian Gaeke
7a3ae1fbad Support -print-machineinstrs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12124 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 19:22:16 +00:00
Chris Lattner
da5c5a5b95 Speed up the cbu pass from taking somewhere near the age of the universe to about 90s on povray 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12123 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 19:16:35 +00:00
Brian Gaeke
323819e4e1 make -print-machineinstrs work for both SparcV9 and X86 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12122 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 19:16:23 +00:00
Alkis Evlogimenos
ce1e500e2f Add assertion for scale verification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12120 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 18:05:02 +00:00
Alkis Evlogimenos
9cccb8aec7 Fix bug introduced by yesterday's changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12119 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 18:02:07 +00:00
Alkis Evlogimenos
5f65adda50 Hide variable from other functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12118 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 17:50:44 +00:00
Chris Lattner
f590ced5c5 Fix BU datastructures with povray! 
The problem was that we were merging a field of a node with a value that was
deleted.  Thanks to bugpoint for reducing povray to a nice small 3 function
example.  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12116 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 17:06:53 +00:00
Chris Lattner
16437ff705 Minor changes, remove some debugging code that got checked in somehow. 
Make sure to scope the NodeMap passed into cloneInto so that it doesn't point
to nodes that are deleted.  Add some FIXME's for future performance enhancements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12115 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 17:05:28 +00:00
Brian Gaeke
4acfd039f9 Asm printer support, based on x86 - only prints mnemonics for now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12113 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 06:00:41 +00:00
Brian Gaeke
da69e7d9b3 Double-FP pseudo-registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12112 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 05:15:03 +00:00
Brian Gaeke
775158d62a Subtract instructions; minor cleanups 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12111 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 04:37:45 +00:00
Brian Gaeke
e7173b7e8e Floating point regs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12110 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 04:37:22 +00:00
Chris Lattner
2f3469013e Only clone nodes that are needed in the caller, don't clone ALL aux calls. This improves 
povray from having ~600K nodes and 300K call nodes to 65K nodes and 25K call nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12109 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 03:57:53 +00:00
Brian Gaeke
e806173ab6 Simple copyConstantToReg support, SETHIi and ORri 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12107 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-04 00:56:25 +00:00
Brian Gaeke
bc1d27aa6e Support add - note, still missing important copyConstantToRegister stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12106 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-03 23:03:14 +00:00
Chris Lattner
76a9eb3e40 Fix a minor bug handling incomplete programs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12105 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-03 23:00:19 +00:00
Chris Lattner
c4ebdcea7a Fix a DSA bug that caused DSA to generate incredibly huge graphs and take forever to 
do it on povray.  The problem is that we were not copying globals from callees to
callers unless the existed in both graphs.  We should have copied them in the case
where the global pointed to a node that was copied as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12104 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-03 22:01:09 +00:00