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6386 Commits

Author SHA1 Message Date
Chris Lattner
9984fd0df9 Fix some comments, avoid sign extending booleans when zero extend works fine 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13440 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 23:16:33 +00:00
Chris Lattner
96e3b426d5 Generate more efficient code for casting booleans to integers (no sign extension required) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13439 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 22:28:45 +00:00
Chris Lattner
cb3ad01833 syntactically loopify natural loops so that the GCC loop optimizer can find them. This should *dramatically* improve the performance of CBE compiled code on targets that depend on GCC's loop optimizations (like PPC) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13438 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 20:41:32 +00:00
Chris Lattner
4589ed9510 Do not emit prototypes for setjmp/longjmp, as they are handled specially 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13437 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 16:03:29 +00:00
Chris Lattner
0555ed8bff Fine grainify namespacification 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13436 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 06:22:29 +00:00
Chris Lattner
6875807572 Make the floating point constant pools local to each function, split the 
FindUsedTypes manipulation stuff out to be a seperate pass, and make the
main CWriter be a function pass now!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13435 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 06:20:51 +00:00
Chris Lattner
c2421439b5 Get this looking more like a function pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13433 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 04:30:20 +00:00
Chris Lattner
0979ca7e3e Implement the AddPrototypes method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13432 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 04:29:57 +00:00
Chris Lattner
a05e0ec419 Print all PHI copies for successor blocks before the terminator, whether it be a conditional branch or switch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13430 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 03:42:48 +00:00
Chris Lattner
be97b4e9ab Fix stupid bug in my checkin yesterday 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13429 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 22:41:42 +00:00
Tanya Lattner
6b160503b5 Changed CPUResource to allow access to maxnum users. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13425 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 16:12:50 +00:00
Tanya Lattner
73e3e2e10f Updating my versions of ModuloScheduling in cvs. Still not complete. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13424 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 16:12:10 +00:00
Brian Gaeke
429022bf83 Add support for widening integral casts. 
Flesh out the SetCC support... which currently ends in a little bit
of unfinished code (which is probably completely hilarious) for
generating the condition value splitting the basic block up into 4
blocks, like this (clearly a better API is needed for this!):

       BB
   cond. branch
     /         /          R1=1    R2=0
     \      /
      \    /
    R=phi(R1,R2)

Other minor edits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13423 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 06:36:14 +00:00
Brian Gaeke
59dbff714c Add a bunch more branches 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13422 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 06:08:29 +00:00
Brian Gaeke
9f56482a43 Flesh out GEP support 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13421 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 05:27:20 +00:00
Brian Gaeke
6b1d2fa1d1 Add ADD with immediate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13420 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 05:26:55 +00:00
Brian Gaeke
c3e970122a Add forms of CMP, SUBCC, and a few branches, and some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13419 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 04:21:32 +00:00
Brian Gaeke
532e60c403 Add stub support for GEPs. 
Add support for branches (based loosely on X86/InstSelectSimple).
Add support for not visiting phi nodes in the first pass.
Add support for loading bools.
Flesh out support for stores.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13418 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 04:21:17 +00:00
Alkis Evlogimenos
880e8e4b4c Add required header 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13417 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 03:50:03 +00:00
Alkis Evlogimenos
feab248c93 Remove unneeded header 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13416 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 03:49:35 +00:00
Chris Lattner
620ce14666 Implement folding of GEP's like: 
%tmp.0 = getelementptr [50 x sbyte]* %ar, uint 0, int 5         ; <sbyte*> [#uses=2]
        %tmp.7 = getelementptr sbyte* %tmp.0, int 8             ; <sbyte*> [#uses=1]

together.  This patch actually allows us to simplify and generalize the code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13415 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 22:09:22 +00:00
Brian Gaeke
e302a7eb43 Add support for copying bool constants to registers. 
Disable the code that copies long constants to registers - it looks fishy.
Implement some simple casts: integral, smaller than longs, and equal-width
 or narrowing only.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13413 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 21:39:30 +00:00
Chris Lattner
e7a31c98db Codegen floating point stores of constants into integer instructions. This 
allows us to compile:

store float 10.0, float* %P

into:
        mov DWORD PTR [%EAX], 1092616192

instead of:

.CPItest_0:                                     # float 0x4024000000000000
.long   1092616192      # float 10
...
        fld DWORD PTR [.CPItest_0]
        fstp DWORD PTR [%EAX]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13409 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 21:18:15 +00:00
Chris Lattner
260195d2b1 Make comparisons against the null pointer as efficient as integer comparisons 
against zero.  In particular, don't emit:

        mov %ESI, 0
        cmp %ECX, %ESI

instead, emit:

       test %ECX, %ECX


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13407 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 19:55:55 +00:00
Chris Lattner
546516c3c0 Fix PR336: The instcombine pass asserts when visiting load instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13400 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-07 15:35:56 +00:00
John Criswell
8cb23dad20 Don't call getForwardedType() twice, as recommended by Chris. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13391 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-06 22:15:47 +00:00
Chris Lattner
bf455c2360 Implement the new cl::PositionalEatsArgs flag, refactor code a bit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13388 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-06 22:04:31 +00:00
John Criswell
7775c1f136 Fix for PR#330. 
When looking at getelementptr instructions, make sure to use a forwarded
type.  We want to do this because a DerivedType may drop its uses and then
refine its users, who may then use another user who hasn't been refined yet.
By getting the forwarded type, we always ensure that we're looking at a
Type that isn't in a halfway refined state.

Now, I should be able to put this stuff in PATypeHandle, but it doesn't work
for some reason.  This should do for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13386 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-06 21:18:08 +00:00
Chris Lattner
a19eedeb7a numeric_limits::infinity() apparently does not work on all systems. As a 
workaround, use the C HUGE_VAL macro instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13377 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-06 16:25:59 +00:00
Brian Gaeke
6178085cfd Move the stuff that fixes the size, orientation & fonts of graphs to 
the debugging functions that call "dot". These fixed settings have
various problems: for example, the fixed size that is set in the graph
traits classes is not appropriate for turning the dot file into a PNG,
and if TrueType font rendering is being used, the 'Courier' TrueType font
may not be installed. It seems easy enough to specify these things on the
command line, anyhow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13366 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-05 06:10:06 +00:00
Brian Gaeke
48b008db57 Apply simplification suggested by Chris: why assign() when operator = will do? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13364 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 22:02:41 +00:00
John Criswell
4a9c90446d Fixed inconsistent indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13363 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 21:46:05 +00:00
Brian Gaeke
7ca6712f81 Missing piece of fix for Bug 333 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13362 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 21:41:45 +00:00
Brian Gaeke
7e4375365e Correctly mangle function names when they are used as part of a 
constant pool member's name.
This is intended to address Bug 333.

Also, fix an anachronistic usage of "M" as a parameter of type Function *.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13357 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 21:09:02 +00:00
Brian Gaeke
d11577b68b Add "Args" optional argument to AbstractInterpreter factory methods, which 
fills in a ToolArgs vector in the AbstractInterpreter if it is set. This
ToolArgs vector is used to pass additional arguments to LLI and/or LLC.
This is intended to address Bug 40.

Also, make -debug-only=toolrunner work for the LLC and CBE
AbstractInterpreters.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13356 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 21:09:01 +00:00
Chris Lattner
bbc130d110 Remove unneeded check 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13355 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 19:35:11 +00:00
Chris Lattner
c8af02c403 Improve signed division by power of 2 *dramatically* from this: 
div:
        mov %EDX, DWORD PTR [%ESP + 4]
        mov %ECX, 64
        mov %EAX, %EDX
        sar %EDX, 31
        idiv %ECX
        ret

to this:

div:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        sar %ECX, 5
        shr %ECX, 26
        mov %EDX, %EAX
        add %EDX, %ECX
        sar %EAX, 6
        ret

Note that the intel compiler is currently making this:

div:
        movl      4(%esp), %edx                                 #3.5
        movl      %edx, %eax                                    #4.14
        sarl      $5, %eax                                      #4.14
        shrl      $26, %eax                                     #4.14
        addl      %edx, %eax                                    #4.14
        sarl      $6, %eax                                      #4.14
        ret                                                     #4.14

Which has one less register->register copy.  (hint hint alkis :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13354 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 19:33:58 +00:00
Brian Gaeke
b171d7949d Add stub support for reading BBTraces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13352 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 17:11:14 +00:00
Chris Lattner
b9110c61fb Do not mark instructions in unreachable sections of the function as live. 
This fixes PR332 and ADCE/2004-05-04-UnreachableBlock.llx


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13349 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 17:00:46 +00:00
Brian Gaeke
660ef70b62 Share ProfilingType enum with the C profiling runtime libraries. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13346 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 16:53:07 +00:00
Chris Lattner
9eb9b8ecb9 Improve code generated for integer multiplications by 2,3,5,9 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13342 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 15:47:14 +00:00
Chris Lattner
32ed46b36e Minor efficiency tweak, suggested by Patrick Meredith 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13341 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-04 15:19:33 +00:00
Brian Gaeke
96e68f9ab1 Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13340 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-03 23:52:07 +00:00
Brian Gaeke
ebbc0e9bbf In InsertProfilingInitCall(), make it legal to pass in a null array, in 
which case you'll get a null array and zero passed to the profiling function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13336 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-03 22:06:33 +00:00
Brian Gaeke
c03eb7b923 Add initial implementation of basic-block tracing instrumentation pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13335 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-03 22:06:32 +00:00
Chris Lattner
7b11e339d2 Fix a problem with double freeing memory. For some reason, CallGraph is not 
acting like a normal pass.  :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13318 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-02 16:06:18 +00:00
Chris Lattner
224f7e65e0 Plug a minor memory leak 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13317 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-02 07:31:34 +00:00
Chris Lattner
bdcc0b8c55 Do not clone arbitrary condition instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13316 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-02 05:19:36 +00:00
Chris Lattner
12fe2b1b82 Do not infinitely "unroll" single BB loops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13315 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-02 05:02:03 +00:00
Chris Lattner
a1f79fb08b Dont' merge terminators that are needed to select PHI node values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13312 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-02 01:00:44 +00:00
Chris Lattner
e67fa05036 Implement SimplifyCFG/branch-cond-merge.ll 
Turning "if (A < B && B < C)" into "if (A < B & B < C)"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13311 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 23:35:43 +00:00
Chris Lattner
00d513182d Make sure to reprocess instructions used by deleted instructions to avoid 
missing opportunities for combination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13309 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 23:27:23 +00:00
Chris Lattner
216d4d85fd Make sure the instruction combiner doesn't lose track of instructions 
when replacing them, missing the opportunity to do simplifications


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13308 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 23:19:52 +00:00
Chris Lattner
951fdb9764 Fix my missing parens 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13307 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 22:41:51 +00:00
Chris Lattner
92da2c2053 Implement SimplifyCFG/branch-cond-prop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13306 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 22:36:37 +00:00
Chris Lattner
77993632a1 Remove unused #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13304 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 21:29:16 +00:00
Chris Lattner
2268684f6f Iterate over the Machine CFG that Brian added instead of the LLVM CFG. 
Look at all of the pretty minuses. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13303 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 21:27:53 +00:00
Chris Lattner
015959ee38 Operate on the Machine CFG instead of on the LLVM CFG 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13302 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 21:24:39 +00:00
Chris Lattner
f25fb4bc64 Stop LiveVariables from using BasicBlocks as part of the mapping, instead 
use MachineBasicBlocks.  To do this, we traverse the Machine CFG instead of
the LLVM CFG, which is also *MUCH* more efficient by having fewer levels of
indirections and mappings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13301 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 21:24:24 +00:00
Chris Lattner
55a4700857 Add a constructor that got lost 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13297 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 11:17:13 +00:00
Brian Gaeke
3c66c355b6 Generalize the strlen size_t hack, for the benefit of the other external 
functions with wrappers that either take or return size_ts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13296 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 06:42:15 +00:00
Tanya Lattner
0e1c48b209 Removing MachineResource class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13291 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-30 20:40:38 +00:00
Chris Lattner
c1526a9da1 Fix a major pessimization in the instcombiner. If an allocation instruction 
is only used by a cast, and the casted type is the same size as the original
allocation, it would eliminate the cast by folding it into the allocation.

Unfortunately, it was placing the new allocation instruction right before
the cast, which could pull (for example) alloca instructions into the body
of a function.  This turns statically allocatable allocas into expensive
dynamically allocated allocas, which is bad bad bad.

This fixes the problem by placing the new allocation instruction at the same
place the old one was, duh. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13289 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-30 04:37:52 +00:00
Misha Brukman
96a8bd7f54 Wrapped code and comments at 80 cols; doxygenified some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13264 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-29 04:05:30 +00:00
Misha Brukman
bf94a1e22a Reorder #includes as per style guide. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13263 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-29 04:04:47 +00:00
Misha Brukman
e5242def97 class AssemblyWriter: 
* Make contained ostream pointer, not reference
* Allow setting of that ostream via setStream()

class CachedWriter:
* setStream() in turn calls setStream() on the AssemblyWriter


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13247 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 19:24:28 +00:00
Misha Brukman
8618e52be5 Send text and numbers directly to CachedWriter's contained ostream. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13243 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 18:52:43 +00:00
Misha Brukman
500acf72cc Squelch compile-time warning (profile build). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13228 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 15:32:09 +00:00
Misha Brukman
5cf1acff3c * Add ability to print out type as symbolic 
* Add Module accessor to AssemblyWriter


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13227 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 15:31:21 +00:00
Brian Gaeke
1afe7736ff Make RequiresFPRegKill() take a MachineBasicBlock arg. 
In InsertFPRegKills(), just check the MachineBasicBlock for successors
instead of its corresponding BasicBlock.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13213 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 04:45:55 +00:00
Brian Gaeke
235aa5eba7 In InsertFPRegKills(), use the machine-CFG itself rather than the 
LLVM CFG when trying to find the successors of BB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13212 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 04:34:16 +00:00
Brian Gaeke
ea9ca67304 Update the machine-CFG edges whenever we see a branch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13211 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-28 04:19:37 +00:00
Brian Gaeke
235d3b7b52 Integrate the rest of my random sparcv9 scribblings into this file 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13204 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-27 22:04:03 +00:00
Chris Lattner
003d5173ca Fix warning building in optimized mode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13190 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-27 18:24:38 +00:00
Chris Lattner
6ffe551f65 Changes to fix up the inst_iterator to pass to boost iterator checks. This 
patch was graciously contributed by Vladimir Prus.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13185 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-27 15:13:33 +00:00
Brian Gaeke
c6e2d8a2ff Add functions that return instances of these printer passes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13175 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-26 16:27:08 +00:00
Chris Lattner
bac7da8461 If an object is not in the scalar map then it must be a global from another 
graph.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13173 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-26 14:44:08 +00:00
Chris Lattner
83a2e6e4a1 Instcombine X/-1 --> 0-X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13172 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-26 14:01:59 +00:00
Brian Gaeke
3ca4fccac5 Fix file header comments and include guards -- many files have been moved or 
renamed since they were last spiffed up, or they just never had proper comments
in the first place.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13148 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-25 07:04:49 +00:00
Brian Gaeke
27beae85a0 Add a getRegisterInfo() accessor just like on the X86 target. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13147 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-25 06:32:28 +00:00
Brian Gaeke
c991586b92 Regularize file header comment and include guard. 
Include SparcV9RegisterInfo.h.
Add a getRegisterInfo() accessor and SparcV9RegisterInfo instance, just like
on the X86 target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13146 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-25 06:32:16 +00:00
Brian Gaeke
2363b4ef5b Add MRegisterInfo subclass for the SparcV9 target (containing only stub 
functions for now). This automatically turns on the printing of machine
registers using their own real names, instead of goofy things like %mreg(42),
and allows us to migrate code incrementally to the new interface as we see fit.

The register file description it uses is hand-written, so that the register
numbers will match the ones that the SparcV9 target already uses.
Perhaps someday we'll tablegen it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13145 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-25 06:32:05 +00:00
Misha Brukman
22108fac63 * Allow aggregating extracted function arguments (controlled by flag) 
* Commandline option (for now) controls that flag that is passed in


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13141 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 23:54:17 +00:00
Brian Gaeke
dd6d822fa6 Fix a typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13136 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 21:45:02 +00:00
Chris Lattner
4a7553e2da Move the scev expansion code into this pass, where it belongs. There is 
still room for cleanup, but at least the code modification is out of the
analysis now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13135 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 21:29:48 +00:00
Chris Lattner
b06432c276 Eliminate all of the SCEV Expansion code which is really part of the 
IndVars pass, not part of SCEV *analysis*.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13134 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 21:29:03 +00:00
Brian Gaeke
18f9f66369 Merge TargetRegInfo.h into SparcV9RegInfo.h, which is its only subclass. 
This prepares us to be able to de-virtualize and de-abstract it, and
take the register allocator bits out and move them into the register allocator
proper...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13127 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 18:15:48 +00:00
Brian Gaeke
3b2e5e619e Include SparcV9RegInfo.h instead of TargetRegInfo.h. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13126 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 18:15:47 +00:00
Brian Gaeke
35450d2aaa Include SparcV9RegInfo.h instead of TargetRegInfo.h. This serves as a bit of 
documentation that this module needs to be made independent of the
register file description of the current target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13125 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 18:15:46 +00:00
Brian Gaeke
4d529bc07b Get rid of the old byte-at-a-time emission code used when the Sparc JIT was 
being tested on X86, as per Chris's request.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13124 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 18:10:38 +00:00
Brian Gaeke
b440dea57b Go back to the interpreter main loop after performing intrinsic lowering, 
because 1) the first instruction might not be a call site, and
2) CS and SF.Caller were not getting set to point to the new call site
anyway (resulting in a crash on e.g. call %llvm.memset).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13122 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 18:05:28 +00:00
Brian Gaeke
b61fc83ecb Use emitWordAt() to emit forward-branch fixups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13120 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 17:11:16 +00:00
Brian Gaeke
62c6f879ae Emit SPARC machine code a word at a time instead of a byte at a time. 
Use emitWordAt() to emit forward-branch fixups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13119 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 17:11:15 +00:00
Brian Gaeke
aea1b58f1e Implement emitWordAt() for the JIT emitter. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13118 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 17:11:14 +00:00
Brian Gaeke
da8246bb71 Implement emitWordAt() for the debug emitter and the file printer emitter. (I 
am not so sure about the file printer emitter, but the debug emitter change
should be harmless.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13117 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 17:11:13 +00:00
Misha Brukman
7d248397a7 Clarify the logic: the flag is renamed to `deleteFn' to signify it will delete 
the function instead of isolating it. This also means the condition is reversed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13112 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-22 23:00:51 +00:00
Misha Brukman
79906c9825 Add a flag to choose between isolating a function or deleting the function from 
the Module. The default behavior keeps functionality as before: the chosen
function is the one that remains.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13111 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-22 22:52:22 +00:00
Chris Lattner
b4782d13d1 Disable a previous patch that was causing indvars to loop infinitely :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13108 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-22 15:12:36 +00:00
Chris Lattner
fcb81f5f4c Fix an extremely serious thinko I made in revision 1.60 of this file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13106 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-22 14:59:40 +00:00
Chris Lattner
1363e85df7 Implement a todo, rewriting all possible scev expressions inside of the 
loop.  This eliminates the extra add from the previous case, but it's
not clear that this will be a performance win overall.  Tommorows test
results will tell. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13103 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 23:36:08 +00:00
Chris Lattner
4e5f03602c This code really wants to iterate over the OPERANDS of an instruction, not 
over its USES.  If it's dead it doesn't have any uses!  :)

Thanks to the fabulous and mysterious Bill Wendling for pointing this out.  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13102 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 22:29:37 +00:00
Chris Lattner
5d461d20ae Implement a fixme. The helps loops that have induction variables of different 
types in them.  Instead of creating an induction variable for all types, it
creates a single induction variable and casts to the other sizes.  This generates
this code:

no_exit:                ; preds = %entry, %no_exit
        %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ]            ; <uint> [#uses=4]
***     %j.0.0 = cast uint %indvar to short             ; <short> [#uses=1]
        %indvar = cast uint %indvar to int              ; <int> [#uses=1]
        %tmp.7 = getelementptr short* %P, uint %indvar          ; <short*> [#uses=1]
        store short %j.0.0, short* %tmp.7
        %inc.0 = add int %indvar, 1             ; <int> [#uses=2]
        %tmp.2 = setlt int %inc.0, %N           ; <bool> [#uses=1]
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=1]
        br bool %tmp.2, label %no_exit, label %loopexit

instead of:

no_exit:                ; preds = %entry, %no_exit
        %indvar = phi ushort [ %indvar.next, %no_exit ], [ 0, %entry ]          ; <ushort> [#uses=2]
***     %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ]            ; <uint> [#uses=3]
        %indvar = cast uint %indvar to int              ; <int> [#uses=1]
        %indvar = cast ushort %indvar to short          ; <short> [#uses=1]
        %tmp.7 = getelementptr short* %P, uint %indvar          ; <short*> [#uses=1]
        store short %indvar, short* %tmp.7
        %inc.0 = add int %indvar, 1             ; <int> [#uses=2]
        %tmp.2 = setlt int %inc.0, %N           ; <bool> [#uses=1]
        %indvar.next = add uint %indvar, 1
***     %indvar.next = add ushort %indvar, 1
        br bool %tmp.2, label %no_exit, label %loopexit

This is an improvement in register pressure, but probably doesn't happen that
often.

The more important fix will be to get rid of the redundant add.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13101 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 22:22:01 +00:00
Chris Lattner
3e1358a9fa Fix an incredibly nasty iterator invalidation problem. I am too spoiled by ilists :) 
Eventually it would be nice if CallGraph maintained an ilist of CallGraphNode's instead
of a vector of pointers to them, but today is not that day.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13100 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 20:44:33 +00:00
Misha Brukman
af76cfb0fb I'm allergic to the word `stuff'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13096 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 18:27:56 +00:00
Brian Gaeke
6896a7dd43 Make SparcV9RegInfo::getRegType() return the right answer for registers 
of IntCC, FloatCC, and Special types.

Make SparcV9RegInfo::getRegClassIDOfRegType() return the right answer
if you ask for the class corresponding to SpecialRegType.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13095 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 17:53:58 +00:00
Alkis Evlogimenos
09233fb86e Include cerrno (gcc-3.4 fix) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13091 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 16:11:40 +00:00
Chris Lattner
107fb18d89 Fix typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13089 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-21 14:23:18 +00:00
Chris Lattner
68d57e7ae8 REALLY fix PR324: don't delete linkonce functions until after the SCC traversal 
is done, which avoids invalidating iterators in the SCC traversal routines


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13088 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 22:06:53 +00:00
Chris Lattner
72035995d5 Pass the callgraph not the module 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13087 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 21:52:26 +00:00
Chris Lattner
a10df50282 Add the ability for SCC passes to initialize and finalize themselves 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13084 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 21:30:06 +00:00
Chris Lattner
c99acc3709 Fix PR325 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13081 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 20:26:03 +00:00
Chris Lattner
5ad2b1d544 Fix PR324 and testcase: Inline/2004-04-20-InlineLinkOnce.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13080 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 20:20:59 +00:00
Brian Gaeke
3f083d5de6 Make it legal to ask for the type of a specialreg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13078 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 20:12:57 +00:00
Chris Lattner
759d34ffb7 Add support for the select instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13076 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-20 16:43:21 +00:00
Brian Gaeke
0eb61037f7 Make it legal to request a load or store of %fsr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13073 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 19:12:12 +00:00
Brian Gaeke
94178e9fca Regularize include guards and remove some excess whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13071 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 18:53:44 +00:00
Brian Gaeke
03b562aecb Tighten up SparcV9FloatCCRegClass::getRegName()'s assertion - if you ask it for 
the name of %fsr (as the comment in SparcV9RegClassInfo.h used to suggest)
you would walk off the end of the FloatCCRegName array.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13070 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 18:53:43 +00:00
Brian Gaeke
854db8a29a Regularize include guards, remove some excess whitespace and fix some comments. 
Remove the extra %fsr register from SparcV9FloatCCRegClass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13069 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 18:53:42 +00:00
Chris Lattner
18f16094c2 Initial checkin of a simple loop unswitching pass. It still needs work, 
but it's a start, and seems to do it's basic job.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13068 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 18:07:02 +00:00
Chris Lattner
45a1cf87d4 It's not just a printer, it's actually an analysis too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13064 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 03:42:32 +00:00
Chris Lattner
446b86d381 Remove code to update loop depths 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13058 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 03:02:09 +00:00
Chris Lattner
5864aebe92 Add #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13057 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 03:01:23 +00:00
Chris Lattner
3280f7bd55 Move isLoopInvariant to the Loop class 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13051 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 22:46:08 +00:00
Chris Lattner
85661d0978 Add new method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13050 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 22:45:27 +00:00
Chris Lattner
59fb87d469 Correct rewriting of exit blocks after my last patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13048 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 22:27:10 +00:00
Chris Lattner
343c0cfa19 Fix computation of exit blocks 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13047 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 22:21:41 +00:00
Chris Lattner
5fa802fe27 Loop exit sets are no longer explicitly held, they are dynamically computed on demand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13046 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 22:15:13 +00:00
Chris Lattner
f1ab4b4eac Change the ExitBlocks list from being explicitly contained in the Loop 
structure to being dynamically computed on demand.  This makes updating
loop information MUCH easier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13045 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 22:14:10 +00:00
Chris Lattner
e3a55865bb Reduce the unrolling limit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13040 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 18:06:14 +00:00
Chris Lattner
cc43909bb6 If the preheader of the loop was the entry block of the function, make sure 
that the exit block of the loop becomes the new entry block of the function.

This was causing a verifier assertion on 252.eon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13039 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 17:38:42 +00:00
Chris Lattner
998f44f859 Be much more careful about how we update instructions outside of the loop 
using instructions inside of the loop.  This should fix the MishaTest failure
from last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13038 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 17:32:39 +00:00
Chris Lattner
3048bd1d3e Implement method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13036 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 06:54:48 +00:00
Chris Lattner
50ca0a195a After unrolling our single basic block loop, fold it into the preheader and exit 
block.  The primary motivation for doing this is that we can now unroll nested loops.

This makes a pretty big difference in some cases.  For example, in 183.equake,
we are now beating the native compiler with the CBE, and we are a lot closer
with LLC.

I'm now going to play around a bit with the unroll factor and see what effect
it really has.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13034 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 06:27:43 +00:00
Chris Lattner
9c2cc4626b Fix a bug: this does not preserve the CFG! 
While we're at it, add support for updating loop information correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13033 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 05:38:37 +00:00
Chris Lattner
24199db80e Add a new method, add a check missing that caused a segfault if a loop didn't 
have a canonical indvar


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13032 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 05:38:05 +00:00
Chris Lattner
83bf2880c3 Initial checkin of a simple loop unroller. This pass is extremely basic and 
limited.  Even in it's extremely simple state (it can only *fully* unroll single
basic block loops that execute a constant number of times), it already helps improve
performance a LOT on some benchmarks, particularly with the native code generators.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13028 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 05:20:17 +00:00
Chris Lattner
3c85eef81a Make the tail duplication threshold accessible from the command line instead of hardcoded 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13025 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-18 00:52:43 +00:00
Chris Lattner
f57a43da9c Fix a memory leak. We leaked the vector holding the entries in switch tables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13023 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-17 23:49:15 +00:00
Chris Lattner
3221ad0db7 Add the ability to compute exit values for complex loop using unanalyzable 
operations.  This allows us to compile this testcase:

int main() {
        int h = 1;
         do h = 3 * h + 1; while (h <= 256);
        printf("%d\n", h);
        return 0;
}

into this:

int %main() {
entry:
        call void %__main( )
        %tmp.6 = call int (sbyte*, ...)* %printf( sbyte* getelementptr ([4 x sbyte]*  %.str_1, long 0, long 0), int 364 )        ; <int> [#uses=0]
        ret int 0
}

This testcase was taken directly from 256.bzip2, believe it or not.

This code is not as general as I would like.  Next up is to refactor it
a bit to handle more cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13019 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-17 22:58:41 +00:00
Chris Lattner
20aa098ba6 If the loop executes a constant number of times, try a bit harder to replace 
exit values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13018 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-17 18:44:09 +00:00
Chris Lattner
7980fb9007 Add the ability to compute trip counts that are only controlled by constants 
even if the loop is using expressions that we can't compute as a closed-form.
This allows us to calculate that this function always returns 55:

int test() {
  double X;
  int Count = 0;
  for (X = 100; X > 1; X = sqrt(X), ++Count)
    /*empty*/;
  return Count;
}

And allows us to compute trip counts for loops like:

        int h = 1;
         do h = 3 * h + 1; while (h <= 256);

(which occurs in bzip2), and for this function, which occurs after inlining
and other optimizations:

int popcount()
{
   int x = 666;
  int result = 0;
  while (x != 0) {
    result = result + (x & 0x1);
    x = x >> 1;
  }
  return result;
}

We still cannot compute the exit values of result or h in the two loops above,
which means we cannot delete the loop, but we are getting closer.  Being able to
compute a constant trip count for these two loops will allow us to unroll them
completely though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13017 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-17 18:36:24 +00:00
Chris Lattner
4f1134e51a Fix a HUGE pessimization on X86. The indvars pass was taking this 
(familiar) function:

int _strlen(const char *str) {
    int len = 0;
    while (*str++) len++;
    return len;
}

And transforming it to use a ulong induction variable, because the type of
the pointer index was left as a constant long.  This is obviously very bad.

The fix is to shrink long constants in getelementptr instructions to intptr_t,
making the indvars pass insert a uint induction variable, which is much more
efficient.

Here's the before code for this function:

int %_strlen(sbyte* %str) {
entry:
        %tmp.13 = load sbyte* %str              ; <sbyte> [#uses=1]
        %tmp.24 = seteq sbyte %tmp.13, 0                ; <bool> [#uses=1]
        br bool %tmp.24, label %loopexit, label %no_exit

no_exit:                ; preds = %entry, %no_exit
***     %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ]            ; <uint> [#uses=2]
***     %indvar = phi ulong [ %indvar.next, %no_exit ], [ 0, %entry ]           ; <ulong> [#uses=2]
        %indvar1 = cast ulong %indvar to uint           ; <uint> [#uses=1]
        %inc.02.sum = add uint %indvar1, 1              ; <uint> [#uses=1]
        %inc.0.0 = getelementptr sbyte* %str, uint %inc.02.sum          ; <sbyte*> [#uses=1]
        %tmp.1 = load sbyte* %inc.0.0           ; <sbyte> [#uses=1]
        %tmp.2 = seteq sbyte %tmp.1, 0          ; <bool> [#uses=1]
        %indvar.next = add ulong %indvar, 1             ; <ulong> [#uses=1]
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=1]
        br bool %tmp.2, label %loopexit.loopexit, label %no_exit

loopexit.loopexit:              ; preds = %no_exit
        %indvar = cast uint %indvar to int              ; <int> [#uses=1]
        %inc.1 = add int %indvar, 1             ; <int> [#uses=1]
        ret int %inc.1

loopexit:               ; preds = %entry
        ret int 0
}


Here's the after code:

int %_strlen(sbyte* %str) {
entry:
        %inc.02 = getelementptr sbyte* %str, uint 1             ; <sbyte*> [#uses=1]
        %tmp.13 = load sbyte* %str              ; <sbyte> [#uses=1]
        %tmp.24 = seteq sbyte %tmp.13, 0                ; <bool> [#uses=1]
        br bool %tmp.24, label %loopexit, label %no_exit

no_exit:                ; preds = %entry, %no_exit
***     %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ]            ; <uint> [#uses=3]
        %indvar = cast uint %indvar to int              ; <int> [#uses=1]
        %inc.0.0 = getelementptr sbyte* %inc.02, uint %indvar           ; <sbyte*> [#uses=1]
        %inc.1 = add int %indvar, 1             ; <int> [#uses=1]
        %tmp.1 = load sbyte* %inc.0.0           ; <sbyte> [#uses=1]
        %tmp.2 = seteq sbyte %tmp.1, 0          ; <bool> [#uses=1]
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=1]
        br bool %tmp.2, label %loopexit, label %no_exit

loopexit:               ; preds = %entry, %no_exit
        %len.0.1 = phi int [ 0, %entry ], [ %inc.1, %no_exit ]          ; <int> [#uses=1]
        ret int %len.0.1
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13016 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-17 18:16:10 +00:00
Chris Lattner
f50af088f1 Even if there are not any induction variables in the loop, if we can compute 
the trip count for the loop, insert one so that we can canonicalize the exit
condition.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13015 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-17 18:08:33 +00:00
Chris Lattner
f5b9eb37a9 Add support for evaluation of exp/log/log10/pow 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13011 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 22:35:33 +00:00
Chris Lattner
657253119e Fix some really nasty dominance bugs that were exposed by my patch to 
make the verifier more strict.  This fixes building zlib


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13002 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 18:08:07 +00:00
Misha Brukman
ea51deb18a Fix retriving parent Function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13001 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 17:37:12 +00:00
Brian Gaeke
c598517c24 Include <cmath> for compatibility with gcc 3.0.x (the system compiler on 
Debian.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12986 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 15:57:32 +00:00
Misha Brukman
98eb6264d4 Assert if deleting BasicBlock before removing it from Function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12983 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 15:47:21 +00:00
Chris Lattner
006118fe8c Fix some of the strange CBE-only failures that happened last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12980 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 06:03:17 +00:00
Chris Lattner
e1f0cf179f Make sure to check for a very bad class of errors: an instruction 
that does not dominate all of its users, but is in the same basic block as
its users.  This class of error is what caused the mysterious CBE only
failures last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12979 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-16 05:51:47 +00:00