Commit Graph

2203 Commits

Author SHA1 Message Date
Chris Lattner
dd9e956605 Preserve and update ETForest. Patch by Daniel Berlin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25203 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-11 05:11:13 +00:00
Chris Lattner
88cac3d2f7 Switch these to using ETForest instead of DominatorSet to compute itself.
Patch written by Daniel Berlin!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25202 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-11 05:10:20 +00:00
Chris Lattner
19ef3d5be2 Switch this to using ETForest instead of DominatorSet to compute itself.
Patch written by Daniel Berlin!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25201 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-11 05:09:40 +00:00
Robert Bocchino
b52ee7f5ff Added support for the extractelement operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25181 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-10 19:05:34 +00:00
Robert Bocchino
56107e21a5 Added lower packed support for the extractelement operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25180 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-10 19:05:05 +00:00
Chris Lattner
baec98d00b Teach loopsimplify to update et-forest. Patch contributed by Daniel Berlin!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25153 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-09 08:03:08 +00:00
Chris Lattner
e8d56c536d fix some 176.gcc miscompilation from my previous patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25137 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-07 01:32:28 +00:00
Chris Lattner
4f637d4db1 silence some bogus gcc warnings on fenris
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25130 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-06 17:59:59 +00:00
Chris Lattner
ad0124c188 Enhance the shift-shift folding code to allow a no-op cast to occur in between
the shifts.

This allows us to fold this (which is the 'integer add a constant' sequence
from cozmic's scheme compmiler):

int %x(uint %anf-temporary776) {
        %anf-temporary777 = shr uint %anf-temporary776, ubyte 1
        %anf-temporary800 = cast uint %anf-temporary777 to int
        %anf-temporary804 = shl int %anf-temporary800, ubyte 1
        %anf-temporary805 = add int %anf-temporary804, -2
        %anf-temporary806 = or int %anf-temporary805, 1
        ret int %anf-temporary806
}

into this:

int %x(uint %anf-temporary776) {
        %anf-temporary776 = cast uint %anf-temporary776 to int
        %anf-temporary776.mask1 = add int %anf-temporary776, -2
        %anf-temporary805 = or int %anf-temporary776.mask1, 1
        ret int %anf-temporary805
}

note that instcombine already knew how to eliminate the AND that the two
shifts fold into.  This is tested by InstCombine/shift.ll:test26

-Chris


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25128 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-06 07:52:12 +00:00
Chris Lattner
830ed03e8b Simplify the code a bit more
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25126 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-06 07:22:22 +00:00
Chris Lattner
4d5542ce6e Extract a bunch of code out of visitShiftInst into FoldShiftByConstant. No
functionality changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25125 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-06 07:12:35 +00:00
Chris Lattner
4eb40df1a8 Pull inline methods out of the pass class definition to make it easier to
read the code.

Do not internalize debugger anchors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25067 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-03 19:13:17 +00:00
Duraid Madina
b5186853f8 getting there...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25021 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-26 13:48:44 +00:00
Chris Lattner
6860f6a01c Fix Transforms/ScalarRepl/2005-12-14-UnionPromoteCrash.ll, a crash on undefined
behavior in 126.gcc on big-endian systems.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24708 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-14 17:23:59 +00:00
Reid Spencer
2f1890792c Improve ResolveFunctions to:
a) use better local variable names (OldMT -> OldFT) where "M" is used to
   mean "Function" (perhaps it was previously "Method"?)
b) print out the module identifier in a warning message so that it is
   possible to track down in which module the error occurred.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24698 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-13 19:56:51 +00:00
Chris Lattner
a188894d67 Implement a little hack for parity with GCC on crafty. This speeds up
186.crafty by about 16% (from 15.109s to 13.045s) on my system.

This turns allocas with unions/casts into scalars.  For example crafty has
something like this:

    union doub {
      unsigned short i[4];
      long long d;
    };
int f(long long a) {
  return ((union doub){.d=a}).i[1];
}

Instead of generating loads and stores to an alloca, we now promote the
whole thing to a scalar long value.

This implements: Transforms/ScalarRepl/AggregatePromote.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24667 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-12 07:19:13 +00:00
Chris Lattner
e08dc62b1a getRawValue zero extens for unsigned values, use getsextvalue so that we
know that small negative values fit into the immediate field of addressing
modes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24608 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-05 18:23:57 +00:00
Chris Lattner
6b44ba2803 Wrap a long line, never internalize llvm.used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24602 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-05 05:07:38 +00:00
Chris Lattner
8e75ee212f Fix SimplifyCFG/2005-12-03-IncorrectPHIFold.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24581 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-03 18:25:58 +00:00
Chris Lattner
2bd4cb597a Fix a bug where we didn't realize that vaarg reads memory. This fixes
Transforms/DeadStoreElimination/2005-11-30-vaarg.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24545 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-30 19:38:22 +00:00
Andrew Lenharth
8dc2d50988 a few more comments on the interfaces and functions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24500 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-28 18:10:59 +00:00
Andrew Lenharth
bb227c1b79 Added documented rsprofiler interface. Also remove new profiler passes, the
old ones have been updated to implement the interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24499 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-28 18:00:38 +00:00
Jeff Cohen
3523f6e7a4 Fix VC++ warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24496 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-28 06:45:57 +00:00
Andrew Lenharth
701f5ac73c Random sampling (aka Arnold and Ryder) profiling. This is still preliminary, but it works on spec on x86 and alpha. The idea is to allow profiling passes to remember what profiling they inserted, then a random sampling framework is inserted which consists of duplicated basic blocks (without profiling), such that at each backedge in the program and entry into every function, the framework chooses whether to use the instrumented code or the instrumentation free code. The goal of such a framework is to make it reasonably cheap to do random sampling of very expensive profiling products (such as load-value profiling).
The code is organized into 3 parts (2 passes)
1) a linked set of profiling passes, which implement an analysis group (linked, like alias analysis are).  These insert profiling into the program, and remember what they inserted, so that at a later time they can be queried about any instruction.

2) a pass that handles inserting the random sampling framework.  This also has options to control how random samples are choosen.  Currently implemented are Global counters, register allocated global counters, and read cycle counter (see? there was a reason for it).

The profiling passes are almost identical to the existing ones (block, function, and null profiling is supported right now), and they are valid passes without the sampling framework (hence the existing passes can be unified with the new ones, not done yet).

Some things are a bit ugly still, but that should be fixed up soon enough.

Other todo? making the counter values not "magic 2^16 -1" values, but dynamically choosable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24493 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-28 00:58:09 +00:00
Andrew Lenharth
b0826529f8 since reg2mem requires it, might as well mention that it preserves it
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24491 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-25 16:04:54 +00:00
Andrew Lenharth
7c0c567058 Reg2Mem is something a pass may depend on, so allow that
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24488 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-22 22:14:23 +00:00
Andrew Lenharth
7045f6c56e turns out, demotion and invokes and critical edges don't mix
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24487 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-22 21:45:19 +00:00
Chris Lattner
1730078d5f Fix a crash building 176.gcc due to my recent patch, which only fixed
half the problem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24414 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-18 18:30:47 +00:00
Chris Lattner
36ba5006df Implement a refinement to the mem2reg algorithm for cases where an alloca
has a single def.  In this case, look for uses that are dominated by the def
and attempt to rewrite them to directly use the stored value.

This speeds up mem2reg on these values and reduces the number of phi nodes
inserted.  This should address PR665.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24411 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-18 07:31:42 +00:00
Chris Lattner
fed40df846 This needs proper dominance
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24410 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-18 07:29:44 +00:00
Chris Lattner
ceda605fd7 This was checking the wrong GEP expression. Fixing this fixes a gccas crash
compiling mysql reported by Ted Kremenek.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24402 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-17 19:35:42 +00:00
Andrew Lenharth
fa25e48412 the pain isn't gone unless the phinodes are spilled too
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24288 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 19:39:09 +00:00
Andrew Lenharth
99b8e26b84 this works with backedges to the existing entry block alot better
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24270 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 17:35:34 +00:00
Andrew Lenharth
183119cdf6 The pass everyone has been waiting for!
Reg2Mem

for fun you can opt -reg2mem -mem2reg


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24267 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 01:58:38 +00:00
Nate Begeman
14b0529532 Add support alignment of allocation instructions.
Add support for specifying alignment and size of setjmp jmpbufs.

No targets currently do anything with this information, nor is it presrved
in the bytecode representation.  That's coming up next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24196 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-05 09:21:28 +00:00
Chris Lattner
3b5f45042b Implement Transforms/TailCallElim/return-undef.ll, a trivial case
that has been sitting in my inbox since May 18. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24194 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-05 08:21:11 +00:00
Chris Lattner
c812e5d6b8 Turn sdiv into udiv if both operands have a clear sign bit. This occurs
a few times in crafty:

OLD:    %tmp.36 = div int %tmp.35, 8            ; <int> [#uses=1]
NEW:    %tmp.36 = div uint %tmp.35, 8           ; <uint> [#uses=0]
OLD:    %tmp.19 = div int %tmp.18, 8            ; <int> [#uses=1]
NEW:    %tmp.19 = div uint %tmp.18, 8           ; <uint> [#uses=0]
OLD:    %tmp.117 = div int %tmp.116, 8          ; <int> [#uses=1]
NEW:    %tmp.117 = div uint %tmp.116, 8         ; <uint> [#uses=0]
OLD:    %tmp.92 = div int %tmp.91, 8            ; <int> [#uses=1]
NEW:    %tmp.92 = div uint %tmp.91, 8           ; <uint> [#uses=0]

Which all turn into shrs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24190 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-05 07:40:31 +00:00
Chris Lattner
11a49f2c0d Turn srem -> urem when neither input has their sign bit set. This triggers
8 times in vortex, allowing the srems to be turned into shrs:

OLD:    %tmp.104 = rem int %tmp.5.i37, 16               ; <int> [#uses=1]
NEW:    %tmp.104 = rem uint %tmp.5.i37, 16              ; <uint> [#uses=0]
OLD:    %tmp.98 = rem int %tmp.5.i24, 16                ; <int> [#uses=1]
NEW:    %tmp.98 = rem uint %tmp.5.i24, 16               ; <uint> [#uses=0]
OLD:    %tmp.91 = rem int %tmp.5.i19, 8         ; <int> [#uses=1]
NEW:    %tmp.91 = rem uint %tmp.5.i19, 8                ; <uint> [#uses=0]
OLD:    %tmp.88 = rem int %tmp.5.i14, 8         ; <int> [#uses=1]
NEW:    %tmp.88 = rem uint %tmp.5.i14, 8                ; <uint> [#uses=0]
OLD:    %tmp.85 = rem int %tmp.5.i9, 1024               ; <int> [#uses=2]
NEW:    %tmp.85 = rem uint %tmp.5.i9, 1024              ; <uint> [#uses=0]
OLD:    %tmp.82 = rem int %tmp.5.i, 512         ; <int> [#uses=2]
NEW:    %tmp.82 = rem uint %tmp.5.i1, 512               ; <uint> [#uses=0]
OLD:    %tmp.48.i = rem int %tmp.5.i.i161, 4            ; <int> [#uses=1]
NEW:    %tmp.48.i = rem uint %tmp.5.i.i161, 4           ; <uint> [#uses=0]
OLD:    %tmp.20.i2 = rem int %tmp.5.i.i, 4              ; <int> [#uses=1]
NEW:    %tmp.20.i2 = rem uint %tmp.5.i.i, 4             ; <uint> [#uses=0]

it also occurs 9 times in gcc, but with odd constant divisors (1009 and 61)
so the payoff isn't as great.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24189 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-05 07:28:37 +00:00
Andrew Lenharth
7bbff04f7f make this 64 bit clean, fixed test30 of /Regression/Transforms/InstCombine/add.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24158 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-02 18:35:40 +00:00
Chris Lattner
76ff2c7504 Limit the search depth of MaskedValueIsZero to 6 instructions, to avoid
bad cases.  This fixes Markus's second testcase in PR639, and should
seal it for good.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24123 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-31 18:35:52 +00:00
Chris Lattner
9fefdb5d66 This pass is now obsolete since all targets have moved to the SelectionDAG
infrastructure and the simple isels have been removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24090 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-29 05:33:46 +00:00
Chris Lattner
5af401d5f1 Remove dead #include
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24083 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-29 04:41:30 +00:00
Chris Lattner
1462aa78c7 Now that instcombine does this xform, remove it from the -raise pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24082 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-29 04:40:23 +00:00
Chris Lattner
cfd65100c4 Pull some code out into a function, give it the ability to see through +.
This allows us to turn code like malloc(4*x+4) -> malloc int, (x+1)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24081 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-29 04:36:15 +00:00
Chris Lattner
455fcc8d35 Remove a special case, allowing the general case to handle it. No functionality
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24076 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-29 03:19:53 +00:00
Chris Lattner
325231c925 Fix a bit of backwards logic that broke exptree and smg2000
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24056 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-28 16:27:35 +00:00
Chris Lattner
108e902aeb Do not sink any instruction with side effects, including vaarg. This fixes
PR640


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24046 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-27 17:13:11 +00:00
Chris Lattner
cbbc6b74e3 Fix #include order
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24044 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-27 16:34:00 +00:00
John Criswell
a115643357 Move some constant folding code shared by Analysis and Transform passes
into the LLVMAnalysis library.
This allows LLVMTranform and LLVMTransformUtils to be archives and linked
with LLVMAnalysis.a, which provides any missing definitions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24036 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-27 15:54:34 +00:00
Chris Lattner
0e026de6ac Fix typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24033 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-27 06:26:26 +00:00