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363e78c357
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8121 Commits

Author SHA1 Message Date
Chris Lattner
363e78c357 If a function always returns a constant, replace all calls sites with that 
constant value.  This makes the return value dead and allows for
simplification in the caller.

This implements IPConstantProp/return-constant.ll

This triggers several dozen times throughout SPEC.

llvm-svn: 17730
 2004-11-14 06:10:11 +00:00
Brian Gaeke
ab60855423 Fix NotTest - round up extraStack to the nearest doubleword, if it is 
not zero.

llvm-svn: 17728
 2004-11-14 05:19:00 +00:00
Chris Lattner
d0a0af0818 Teach SROA how to promote an array index that is variable, if the dimension 
of the array is just two.  This occurs 8 times in gcc, 6 times in crafty, and
12 times in 099.go.

This implements ScalarRepl/sroa_two.ll

llvm-svn: 17727
 2004-11-14 05:00:19 +00:00
Brian Gaeke
79f5f96a60 Update failing Benchmarks; point out that I'm skipping Shootout-C++. 
llvm-svn: 17725
 2004-11-14 04:43:12 +00:00
Chris Lattner
bc35272f86 Rearrange some code, no functionality changes. 
llvm-svn: 17724
 2004-11-14 04:24:28 +00:00
Brian Gaeke
505a9ee73d Update expected UnitTests failures. 
llvm-svn: 17723
 2004-11-14 03:22:08 +00:00
Brian Gaeke
1b3d701769 Rewrite outgoing arg handling to handle more weird corner cases. 
llvm-svn: 17722
 2004-11-14 03:22:07 +00:00
Brian Gaeke
294af88a7a Support UndefValue emission. 
llvm-svn: 17721
 2004-11-14 03:22:05 +00:00
Chris Lattner
9b2f0f93e3 Remove debugging code 
llvm-svn: 17719
 2004-11-13 23:32:53 +00:00
Chris Lattner
9749bf21f8 Argument promotion transforms functions to unconditionally load their 
argument pointers.  This is only valid to do if the function already
unconditionally loaded an argument or if the pointer passed in is known
to be valid.  Make sure to do the required checks.

This fixed ArgumentPromotion/control-flow.ll and the Burg program.

llvm-svn: 17718
 2004-11-13 23:31:34 +00:00
Chris Lattner
09b7f968e0 Don't print unneeded labels 
llvm-svn: 17714
 2004-11-13 23:27:11 +00:00
Chris Lattner
3684294c71 Hack around stupidity in GCC, fixing Burg with the CBE and 
CBackend/2004-11-13-FunctionPointerCast.llx

llvm-svn: 17710
 2004-11-13 22:21:56 +00:00
Chris Lattner
1cde11aa95 shld is a very high latency operation. Instead of emitting it for shifts of 
two or three, open code the equivalent operation which is faster on athlon
and P4 (by a substantial margin).

For example, instead of compiling this:

long long X2(long long Y) { return Y << 2; }

to:

X3_2:
        movl 4(%esp), %eax
        movl 8(%esp), %edx
        shldl $2, %eax, %edx
        shll $2, %eax
        ret

Compile it to:

X2:
        movl 4(%esp), %eax
        movl 8(%esp), %ecx
        movl %eax, %edx
        shrl $30, %edx
        leal (%edx,%ecx,4), %edx
        shll $2, %eax
        ret

Likewise, for << 3, compile to:

X3:
        movl 4(%esp), %eax
        movl 8(%esp), %ecx
        movl %eax, %edx
        shrl $29, %edx
        leal (%edx,%ecx,8), %edx
        shll $3, %eax
        ret

This matches icc, except that icc open codes the shifts as adds on the P4.

llvm-svn: 17707
 2004-11-13 20:48:57 +00:00
Chris Lattner
c531e090db Add missing check 
llvm-svn: 17706
 2004-11-13 20:04:38 +00:00
Chris Lattner
d1381380ae Compile: 
long long X3_2(long long Y) { return Y+Y; }
int X(int Y) { return Y+Y; }

into:

X3_2:
        movl 4(%esp), %eax
        movl 8(%esp), %edx
        addl %eax, %eax
        adcl %edx, %edx
        ret
X:
        movl 4(%esp), %eax
        addl %eax, %eax
        ret

instead of:

X3_2:
        movl 4(%esp), %eax
        movl 8(%esp), %edx
        shldl $1, %eax, %edx
        shll $1, %eax
        ret

X:
        movl 4(%esp), %eax
        shll $1, %eax
        ret

llvm-svn: 17705
 2004-11-13 20:03:48 +00:00
Chris Lattner
70e351fb1c Simplify handling of shifts to be the same as we do for adds. Add support 
for (X * C1) + (X * C2) (where * can be mul or shl), allowing us to fold:

   Y+Y+Y+Y+Y+Y+Y+Y

into
         %tmp.8 = shl long %Y, ubyte 3           ; <long> [#uses=1]

instead of

        %tmp.4 = shl long %Y, ubyte 2           ; <long> [#uses=1]
        %tmp.12 = shl long %Y, ubyte 2          ; <long> [#uses=1]
        %tmp.8 = add long %tmp.4, %tmp.12               ; <long> [#uses=1]

This implements add.ll:test25

Also add support for (X*C1)-(X*C2) -> X*(C1-C2), implementing sub.ll:test18

llvm-svn: 17704
 2004-11-13 19:50:12 +00:00
Chris Lattner
7a8d26a581 Fold: 
(X + (X << C2)) --> X * ((1 << C2) + 1)
   ((X << C2) + X) --> X * ((1 << C2) + 1)

This means that we now canonicalize "Y+Y+Y" into:

        %tmp.2 = mul long %Y, 3         ; <long> [#uses=1]

instead of:

        %tmp.10 = shl long %Y, ubyte 1          ; <long> [#uses=1]
        %tmp.6 = add long %Y, %tmp.10               ; <long> [#uses=1]

llvm-svn: 17701
 2004-11-13 19:31:40 +00:00
Chris Lattner
d348f5b9fb Lazily create the abort message, so only translation units that use unwind 
will actually get it.

llvm-svn: 17700
 2004-11-13 19:07:32 +00:00
Chris Lattner
ab917141d0 Fix: CodeExtractor/2004-11-12-InvokeExtract.ll 
llvm-svn: 17699
 2004-11-13 00:06:45 +00:00
Chris Lattner
c6b1d7a081 Fix a bug where the code extractor would get a bit confused handling invoke 
instructions, setting DefBlock to a block it did not have dom info for.

llvm-svn: 17697
 2004-11-12 23:50:44 +00:00
Chris Lattner
922a1b4601 Simplify handling of constant initializers 
llvm-svn: 17696
 2004-11-12 22:42:57 +00:00
Reid Spencer
f6caf3b1c2 Makefile for lib/Linker 
llvm-svn: 17695
 2004-11-12 20:38:45 +00:00
Reid Spencer
f755c169b3 This file originated in lib/VMCore/Linker.cpp but now lives in 
lib/Linker/LinkModules.cpp

llvm-svn: 17694
 2004-11-12 20:37:43 +00:00
Reid Spencer
13a6af95ad This file originated in tools/gccld/Linker.cpp but now lives in 
lib/Linker/LinkArchives.cpp

llvm-svn: 17693
 2004-11-12 20:34:32 +00:00
Chris Lattner
1a469385bd Actually, leave the check in. This prevents us from counting dead arguments 
as IPCP opportunities.

llvm-svn: 17680
 2004-11-11 07:47:54 +00:00
Chris Lattner
dba9c2b0ef Fix bug: IPConstantProp/deadarg.ll 
llvm-svn: 17679
 2004-11-11 07:46:29 +00:00
Chris Lattner
d920b5b770 Make IP Constant prop more aggressive about handling self recursive calls. 
This implements IPConstantProp/recursion.ll

llvm-svn: 17666
 2004-11-10 19:43:59 +00:00
John Criswell
402e338f11 Correct the name of stosd for the AT&T syntax: 
It's stosl (l for long == 32 bit).

llvm-svn: 17658
 2004-11-10 04:48:15 +00:00
Chris Lattner
b214a04a16 Do not let dead constant expressions hanging off of functions prevent IPCP. 
This allows to elimination of a bunch of global pool descriptor args from
programs being pool allocated (and is also generally useful!)

llvm-svn: 17657
 2004-11-09 20:47:30 +00:00
Reid Spencer
d17e35893c Fix isBytecodeFile to correctly recognized compressed bytecode too. 
llvm-svn: 17655
 2004-11-09 20:27:23 +00:00
Reid Spencer
28ceb24005 * Implement getStatusInfo for getting stat(2) like information 
* Implement createTemporaryFile for mkstemp(3) functionality
* Fix isBytecodeFile to accept llvc magic # (compressed) as bytecode.

llvm-svn: 17654
 2004-11-09 20:26:31 +00:00
John Criswell
5be81b837b Recognize compressed LLVM bytecode files. 
This should fix the problem of not being able to link compressed LLVM
bytecode files from LLVM libraries.

llvm-svn: 17648
 2004-11-09 19:37:07 +00:00
Reid Spencer
d9387fee02 Tune compression: 
bzip2: block size 9 -> 5, reduces memory by 400Kbytes, doesn't affect speed
       or compression ratio on all but the largest bytecode files (>1MB)
zip:   level 9 -> 6, this speeds up compression time by ~30% but only
       degrades the compressed size by a few bytes per megabyte. Those few
       bytes aren't worth the effort.

llvm-svn: 17647
 2004-11-09 17:58:09 +00:00
Chris Lattner
9f035c9fdb Change this back so that I get stable numbers to reflect the change from the 
nightly testers

llvm-svn: 17646
 2004-11-09 08:05:23 +00:00
Chris Lattner
b924e8be62 Fix bug: 2004-11-08-FreeUseCrash.ll 
llvm-svn: 17642
 2004-11-09 05:10:56 +00:00
Misha Brukman
5718caa3ab * Convert tabs to spaces 
* Order #includes according to style guide
* Remove extraneous blank lines

llvm-svn: 17639
 2004-11-09 04:27:19 +00:00
Nate Begeman
398bd2b9f6 Allow hbd to be bugpointable on darwin by fixing common and linkonce codegen 
llvm-svn: 17637
 2004-11-09 04:01:18 +00:00
Misha Brukman
f28a01454d Handle headers for compressed bytecode files 
llvm-svn: 17634
 2004-11-08 22:03:32 +00:00
Chris Lattner
0efef015fa Fix a bug that was preventing povray and namd from pool allocating correctly. 
llvm-svn: 17632
 2004-11-08 21:08:46 +00:00
Chris Lattner
dcee21898f Handle assert_fail special 
llvm-svn: 17631
 2004-11-08 21:08:28 +00:00
Reid Spencer
af24480f3e Fix a typo: isvalid -> isValid 
llvm-svn: 17621
 2004-11-08 08:27:51 +00:00
Nate Begeman
a0c15f3ffd Put int the getReg cast optimization from x86 so that we generate fewer 
move instructions for the register allocator to coalesce.

llvm-svn: 17608
 2004-11-08 02:25:40 +00:00
Misha Brukman
8c397821a5 Implement ExecutionEngine::freeMachineCodeForFunction() 
llvm-svn: 17601
 2004-11-07 23:58:46 +00:00
Chris Lattner
a9e56ddaa3 VERY large functions that are only called from one place are not really 
exciting to inline.  Only inline medium or small sized functions with a
single call site.

llvm-svn: 17588
 2004-11-07 21:46:47 +00:00
Nate Begeman
a7541b19fc Disable bogus cast elimination when the cast is used by a setcc instruction. 
llvm-svn: 17583
 2004-11-07 20:23:42 +00:00
Reid Spencer
c9c7c7fbee * Comments & cleanup per CL code review. 
* Accept 'llvc' as signature for compressed bytecode

llvm-svn: 17579
 2004-11-07 18:20:55 +00:00
Reid Spencer
152f895e9b Add comments per CL code review. 
llvm-svn: 17578
 2004-11-07 18:19:00 +00:00
Reid Spencer
1446cd065f * Add comments and cleanup per CL code review 
* Make signature for compressed bytecode llvc instead of unreadable
* Make the CompressionContext have a constructor and destructor.

llvm-svn: 17576
 2004-11-07 18:17:38 +00:00
Misha Brukman
ce8c2c2aee Replace uses of llvm.org with llvm.cs.uiuc.edu 
llvm-svn: 17549
 2004-11-07 00:58:38 +00:00
Misha Brukman
820aa44589 Consistently use llvm.cs.uiuc.edu instead of llvm.org 
llvm-svn: 17548
 2004-11-07 00:58:20 +00:00