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Author SHA1 Message Date
Chris Lattner
df5ebdc8b1 Eliminate a REALLY HORRIBLE API: mutateReferences, which is gross gross gross. 
llvm-svn: 12212
 2004-03-08 06:09:57 +00:00
Chris Lattner
1ecf76aab7 New testcase for PR269 
llvm-svn: 12211
 2004-03-08 05:35:12 +00:00
Chris Lattner
74d74316fe Bug fixed 
llvm-svn: 12210
 2004-03-08 04:55:45 +00:00
Chris Lattner
66f3cfa109 Testcase that crashes the C front-end. 
llvm-svn: 12209
 2004-03-08 04:41:32 +00:00
Chris Lattner
1ae4150e31 Fix a bug handling globals that are constants, but are still external 
llvm-svn: 12208
 2004-03-08 03:52:24 +00:00
Chris Lattner
a7180252e6 Avoid allocating special registers a bit more robustly 
llvm-svn: 12207
 2004-03-08 03:48:07 +00:00
Chris Lattner
8cd89d333c New code-quality testcase. 
llvm-svn: 12205
 2004-03-08 02:12:36 +00:00
Chris Lattner
a55628694a 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.

llvm-svn: 12204
 2004-03-08 01:58:35 +00:00
Chris Lattner
9a9b1c4822 Rearrange and refactor some code. No functionality changes. 
llvm-svn: 12203
 2004-03-08 01:18:36 +00:00
Chris Lattner
933f605592 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.

llvm-svn: 12202
 2004-03-08 01:04:36 +00:00
Chris Lattner
2340d903fa New testcase 
llvm-svn: 12201
 2004-03-08 00:58:19 +00:00
Chris Lattner
ebebe8f4a0 Implement: ArgumentPromotion/chained.ll 
llvm-svn: 12200
 2004-03-07 22:52:53 +00:00
Chris Lattner
5a2ee65f6c New testcase for missed case 
llvm-svn: 12199
 2004-03-07 22:52:41 +00:00
Chris Lattner
8494ba277f Fix another minor bug, exposed by perlbmk 
llvm-svn: 12198
 2004-03-07 22:43:27 +00:00
Chris Lattner
ca3b90f308 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.

llvm-svn: 12197
 2004-03-07 22:16:24 +00:00
Chris Lattner
0179360703 Run the new pass in gccld now that it passes all tests 
llvm-svn: 12196
 2004-03-07 22:12:40 +00:00
Chris Lattner
45cf084497 Fix a minor bug and turn debug output into, well, debug output. 
llvm-svn: 12195
 2004-03-07 21:54:50 +00:00
Chris Lattner
db27e586bf Add prototype 
llvm-svn: 12194
 2004-03-07 21:30:08 +00:00
Chris Lattner
4415950211 New LLVM pass: argument promotion. This version only handles simple scalar 
variables.

llvm-svn: 12193
 2004-03-07 21:29:54 +00:00
Chris Lattner
f4fa087828 New testcase 
llvm-svn: 12192
 2004-03-07 21:28:54 +00:00
Alkis Evlogimenos
65649a50e9 Add memory operand version of conditional move. 
llvm-svn: 12190
 2004-03-07 03:19:11 +00:00
Alkis Evlogimenos
02e8f14c6a As I wrote in the docs, simple is the default spiller :-) 
llvm-svn: 12189
 2004-03-06 23:08:44 +00:00
Alkis Evlogimenos
467364b706 Add simple spiller. 
llvm-svn: 12188
 2004-03-06 22:38:29 +00:00
Alkis Evlogimenos
224e6bdd1d The default register allocator is local not simple. 
llvm-svn: 12187
 2004-03-06 22:27:41 +00:00
Brian Gaeke
4bb4ec2388 Support return values of basic integer types. 
Emit RETL instruction to return instead of funny JMPL.
Fix indentation.

llvm-svn: 12186
 2004-03-06 05:32:28 +00:00
Brian Gaeke
855518207c Sort stanzas into Sparc V8 book page number order. 
Add RET, RETL.  Rename SAVE, RESTORE & JMPL for consistency.

llvm-svn: 12185
 2004-03-06 05:32:13 +00:00
Brian Gaeke
813f0d8512 Hack it so we do not try to allocate values to G0. 
llvm-svn: 12184
 2004-03-06 05:31:32 +00:00
Brian Gaeke
a265c3c4df Make prolog align stack properly. Make epilog not touch any registers. 
llvm-svn: 12183
 2004-03-06 05:31:21 +00:00
Brian Gaeke
b4258231ca Emit register names in lowercase, as required by the assembler. 
llvm-svn: 12182
 2004-03-06 05:30:21 +00:00
Brian Gaeke
13f3e2f254 Teach getRegClassForType where to find FP registers 
llvm-svn: 12180
 2004-03-06 03:54:13 +00:00
Chris Lattner
5a9cae47a4 Fix a minor bug 
llvm-svn: 12169
 2004-03-05 22:04:07 +00:00
Misha Brukman
75729872be Unbreak the build on Sparc. 
llvm-svn: 12161
 2004-03-05 20:04:40 +00:00
Brian Gaeke
689af03601 Asm output is looking a lot better; not correct for all operands yet though. 
llvm-svn: 12143
 2004-03-05 08:39:09 +00:00
Chris Lattner
f21e7a75d6 Fix a bug in a previous checkin that broke 175.vpr 
llvm-svn: 12128
 2004-03-04 21:36:57 +00:00
Chris Lattner
c885697daa Add support for strto* and v*printf 
llvm-svn: 12127
 2004-03-04 21:03:54 +00:00
Chris Lattner
48b0fd7101 Add non-crappy support for varargs 
llvm-svn: 12126
 2004-03-04 20:33:47 +00:00
Chris Lattner
ac1eaa43fa 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.

llvm-svn: 12125
 2004-03-04 19:47:04 +00:00
Brian Gaeke
a24ac9bf8b Support -print-machineinstrs 
llvm-svn: 12124
 2004-03-04 19:22:16 +00:00
Chris Lattner
e3fc09a37e Speed up the cbu pass from taking somewhere near the age of the universe to about 90s on povray 
llvm-svn: 12123
 2004-03-04 19:16:35 +00:00
Brian Gaeke
0b913593ae make -print-machineinstrs work for both SparcV9 and X86 
llvm-svn: 12122
 2004-03-04 19:16:23 +00:00
Alkis Evlogimenos
e8ebdcc780 Add assertion for scale verification. 
llvm-svn: 12120
 2004-03-04 18:05:02 +00:00
Alkis Evlogimenos
64aa7f3708 Fix bug introduced by yesterday's changes. 
llvm-svn: 12119
 2004-03-04 18:02:07 +00:00
Alkis Evlogimenos
d6bb9674d9 Hide variable from other functions. 
llvm-svn: 12118
 2004-03-04 17:50:44 +00:00
Chris Lattner
bc7fc82865 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.  :)

llvm-svn: 12116
 2004-03-04 17:06:53 +00:00
Chris Lattner
e0c90cf983 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.

llvm-svn: 12115
 2004-03-04 17:05:28 +00:00
Brian Gaeke
9c6c572f24 Asm printer support, based on x86 - only prints mnemonics for now 
llvm-svn: 12113
 2004-03-04 06:00:41 +00:00
Brian Gaeke
f8440c5a60 Double-FP pseudo-registers. 
llvm-svn: 12112
 2004-03-04 05:15:03 +00:00
Brian Gaeke
b2f869ee43 Subtract instructions; minor cleanups 
llvm-svn: 12111
 2004-03-04 04:37:45 +00:00
Brian Gaeke
0d71671bcf Floating point regs 
llvm-svn: 12110
 2004-03-04 04:37:22 +00:00
Chris Lattner
790bd9d970 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.

llvm-svn: 12109
 2004-03-04 03:57:53 +00:00