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a47f60bfaf
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1475 Commits

Author SHA1 Message Date
Zhou Sheng
a47f60bfaf Fix a bug in function ComputeMaskedBits(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35027 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 15:15:18 +00:00
Chris Lattner
97f9df1cd1 This appears correct, enable it so we can see perf changes on testers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35024 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 07:03:55 +00:00
Chris Lattner
c14d3cac4b Second half of PR1226. This is currently still disabled, until I have a chance to 
do the correctness/performance analysis testing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35023 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 06:36:54 +00:00
Zhou Sheng
9a28daa864 Fix a bug in APIntified ComputeMaskedBits(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35022 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 05:42:00 +00:00
Reid Spencer
e7816b5c9e For PR1205: 
Provide an APIntified version of MaskedValueIsZero. This will (temporarily)
cause a "defined but not used" message from the compiler. It will be used
in the next patch in this series.

Patch by Sheng Zhou.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35019 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 01:52:58 +00:00
Reid Spencer
3e7594f187 For PR1205: 
Add a new ComputeMaskedBits function that is APIntified. We'll slowly
convert things over to use this version. When its all done, we'll remove
the existing version.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35018 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 01:46:38 +00:00
Devang Patel
5ee9997906 Now IndVarSimplify is a LoopPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35003 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-07 06:39:01 +00:00
Devang Patel
54959d6cf6 Now LICM is a LoopPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35001 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-07 04:41:30 +00:00
Devang Patel
3f1a1e0366 Now LoopUnroll is a LoopPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34996 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-07 01:38:05 +00:00
Devang Patel
1bc89361c2 Now LoopUnswitch is a LoopPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34992 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-07 00:26:10 +00:00
Devang Patel
0f54dcbf07 Now LoopStrengthReduce is a LoopPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34984 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-06 21:14:09 +00:00
Reid Spencer
baf1e4b914 Remove an unnecessary if statement and adjust indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34939 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-05 23:36:13 +00:00
Chris Lattner
372dda8881 This is the first major step of implementing PR1226. We now successfully 
scalarrepl things down to elements, but mem2reg can't promote elements that
are memset/memcpy'd.  Until then, the code is disabled "0 &&".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34924 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-05 07:52:57 +00:00
Chris Lattner
3c69849696 fix a subtle bug that caused an MSVC warning. Thanks to Jeffc for pointing this out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34920 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-05 00:11:19 +00:00
Chris Lattner
783ccdb5c4 Add some simplifications for demanded bits, this allows instcombine to turn: 
define i64 @test(i64 %A, i32 %B) {
        %tmp12 = zext i32 %B to i64             ; <i64> [#uses=1]
        %tmp3 = shl i64 %tmp12, 32              ; <i64> [#uses=1]
        %tmp5 = add i64 %tmp3, %A               ; <i64> [#uses=1]
        %tmp6 = and i64 %tmp5, 123              ; <i64> [#uses=1]
        ret i64 %tmp6
}

into:

define i64 @test(i64 %A, i32 %B) {
        %tmp6 = and i64 %A, 123         ; <i64> [#uses=1]
        ret i64 %tmp6
}

This implements Transforms/InstCombine/add2.ll:test1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34919 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-05 00:02:29 +00:00
Jeff Cohen
ca5183d445 Unbreak VC++ build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34917 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-05 00:00:42 +00:00
Chris Lattner
d5fa214729 simplify some code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34914 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 23:16:36 +00:00
Chris Lattner
57939df2eb minor cleanups 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34904 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 04:50:21 +00:00
Chris Lattner
f964f321eb Speed up -instcombine by 20% by avoiding a particularly expensive passmgr call. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34902 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 04:27:24 +00:00
Chris Lattner
55091782c1 switch MarkAliveBlocks over to using SmallPtrSet instead of std::set, speeding 
up simplifycfg by 20%


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34901 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 04:20:48 +00:00
Chris Lattner
9f3d738866 make better use of LCSSA information in RewriteLoopExitValues. Before, we 
would scan the entire loop body, then scan all users of instructions in the
loop, looking for users outside the loop.  Now, since we know that the
loop is in LCSSA form, we know that any users outside the loop will be LCSSA
phi nodes.  Just scan them.

This speeds up indvars significantly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34898 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 03:43:23 +00:00
Chris Lattner
9caed5440d Implement PR1179/PR1232 and test/Transforms/IndVarsSimplify/loop_evaluate_[234].ll 
This makes -indvars require and use LCSSA, updating it as appropriate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34896 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 01:00:28 +00:00
Chris Lattner
c9838f25d5 Make RewriteLoopExitValues far less nested by using continue in the loop 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34891 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-03 22:48:48 +00:00
Chris Lattner
c739cd6d07 my recent change caused a failure in a bswap testcase, because it changed 
the order that instcombine processed instructions in the testcase.  The end
result is that instcombine finished with:

define i16 @test1(i16 %a) {
        %tmp = zext i16 %a to i32               ; <i32> [#uses=2]
        %tmp21 = lshr i32 %tmp, 8               ; <i32> [#uses=1]
        %tmp5 = shl i32 %tmp, 8         ; <i32> [#uses=1]
        %tmp.upgrd.32 = or i32 %tmp21, %tmp5            ; <i32> [#uses=1]
        %tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16           ; <i16> [#uses=1]
        ret i16 %tmp.upgrd.3
}

which can't get matched as a bswap.

This patch makes instcombine more sophisticated about removing truncating
casts, allowing it to turn this into:

define i16 @test2(i16 %a) {
        %tmp211 = lshr i16 %a, 8
        %tmp52 = shl i16 %a, 8
        %tmp.upgrd.323 = or i16 %tmp211, %tmp52
        ret i16 %tmp.upgrd.323
}

which then matches as bswap.  This fixes bswap.ll and implements
InstCombine/cast2.ll:test[12].  This also implements cast elimination of
add/sub.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34870 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-03 05:27:34 +00:00
Nick Lewycky
b6431da7be Translate bit operations to English. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34868 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-03 03:14:40 +00:00
Chris Lattner
ec9c35826d add a top-level iteration loop to instcombine. This means that it will never 
finish without combining something it is capable of.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34865 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-03 02:04:50 +00:00
Reid Spencer
af3e9468dc APIntify this pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34863 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-03 00:48:31 +00:00
Reid Spencer
bee0f663d8 Finally get this patch right :) 
Replace expensive getZExtValue() == 0 calls with isZero() calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34861 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 23:51:25 +00:00
Reid Spencer
502db93a8a Dang, I've done that twice now! Undo previous commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34860 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 23:37:53 +00:00
Reid Spencer
a5dae0cac0 Use more efficient test for one value in a ConstantInt. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34859 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 23:35:28 +00:00
Reid Spencer
4e69f48a0a Guard against huge loop trip counts in an APInt safe way. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34858 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 23:31:34 +00:00
Chris Lattner
dbab386e23 Fix a significant algorithm problem with the instcombine worklist. removing 
a value from the worklist required scanning the entire worklist to remove all
entries.  We now use a combination map+vector to prevent duplicates from
happening and prevent the scan.  This speeds up instcombine on a large file
from the llvm-gcc bootstrap from 189.7s to 4.84s in a debug build and from
5.04s to 1.37s in a release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34848 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 21:28:56 +00:00
Chris Lattner
f22a5c6e9e minor cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34846 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 19:59:19 +00:00
Reid Spencer
513d0f25ed Reverse a premature commital. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34822 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 00:31:39 +00:00
Reid Spencer
cae5754619 Prefer non-virtual calls to ConstantInt::isZero over virtual calls to 
Constant::isNullValue() in situations where it is possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34821 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 00:28:52 +00:00
Reid Spencer
a3507ebd33 Although probably not necessary, guard against a potential assertion by 
using isNullValue() instead of getZExtValue() == 0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34815 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-01 21:54:37 +00:00
Reid Spencer
4da0451821 Use isUnitValue() instead of getZExtValue() == 1 which will prevent an 
assert if the ConstantInt's value is large.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34814 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-01 21:51:23 +00:00
Reid Spencer
62aa905595 The 64-bit constructor for ConstantInt changes from int64_t to uint64_t. 
This caused a warning for construction with -1. Avoid the warning by using
-1ULL instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34796 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-01 19:33:52 +00:00
Reid Spencer
a6e8a955d6 Remove the "isSigned" parameters from ConstantRange. It turns out they 
are not needed as the results are the same with or without it.

Patch by Nicholas Lewycky.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34782 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-01 07:54:15 +00:00
Reid Spencer
c6aedf70b3 For PR1205: 
Adjust to changes in ConstantRange interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34762 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-28 22:03:51 +00:00
Reid Spencer
581b0d453a For PR1205: 
Remove ConstantInt from ConstantRange interface and adjust its users to
compensate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34758 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-28 19:57:34 +00:00
Reid Spencer
dc5c159701 For PR1205: 
First round of ConstantRange changes. This makes all CR constructors use
only APInt and not use ConstantInt. Clients are adjusted accordingly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34756 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-28 18:57:32 +00:00
Devang Patel
fb688d4d1c Use efficient container SmallPtrSet 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34640 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-26 20:22:50 +00:00
Devang Patel
5295692061 Do not unswitch loop on same value again and again. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34638 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-26 19:31:58 +00:00
Chris Lattner
b3036683c1 Fix InstCombine/2007-02-23-PhiFoldInfLoop.ll and PR1217 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34546 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-24 01:03:45 +00:00
Chris Lattner
535014f8ec convert more vectors to smallvectors, 2.8% speedup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34333 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-15 22:52:10 +00:00
Chris Lattner
72588fc3f4 change some vectors to smallvectors. This speeds up instcombine on 447.dealII 
by 5%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34332 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-15 22:48:32 +00:00
Chris Lattner
1f87a58ab2 switch an std::set to a SmallPtr set, this speeds up instcombine by 9.5% 
on 447.dealII


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34323 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-15 19:41:52 +00:00
Reid Spencer
ac9dcb94dd For PR1195: 
Change use of "packed" term to "vector" in comments, strings, variable
names, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34300 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-15 03:39:18 +00:00
Reid Spencer
d29b8b85ce Change an assert that mentions Packed Type -> Vector Type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34298 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-15 03:11:20 +00:00