Chris Lattner
83c4ec0372
Fix two bugs: one where a condition was mistakenly swapped, and another
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where we folded (X & 254) -> X < 1 instead of X < 2. These problems were
latent problems exposed by the latest patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16528 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-27 19:29:18 +00:00
Chris Lattner
f63f647345
Fold: (setcc (shr X, ShAmt), CI), where 'cc' is eq or ne. This xform
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triggers often, for example:
6x in povray, 1x in gzip, 279x in gcc, 1x in crafty, 8x in eon, 11x in perlbmk,
362x in gap, 4x in vortex, 14 in m88ksim, 211x in 126.gcc, 1x in compress,
11x in ijpeg, and 4x in 147.vortex.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16521 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-27 16:18:50 +00:00
Chris Lattner
0c96766c90
Implement shift-and combinations, implementing InstCombine/and.ll:test19-21
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These combinations trigger 4 times in povray, 7x in gcc, 4x in gap, and 2x in bzip2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16508 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-24 15:21:34 +00:00
Chris Lattner
648e3bc39c
Move LHSI->hasOneUse() into the arms of the conditional, reindenting code.
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No functionality changes here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16505 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-23 21:52:49 +00:00
Chris Lattner
b20ba0a83f
Implement Transforms/InstCombine/and.ll:test18, a case that occurs 20 times
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in perlbmk
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16504 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-23 21:46:38 +00:00
Chris Lattner
684fe210a9
Implement select.ll:test16: fold load (select C, X, null) -> load X
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16499 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-23 15:46:00 +00:00
Chris Lattner
3d834bf2c3
Do not fold (X + C1 != C2) if there are other users of the add. Doing
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this transformation used to take a loop like this:
int Array[1000];
void test(int X) {
int i;
for (i = 0; i < 1000; ++i)
Array[i] += X;
}
Compiled to LLVM is:
no_exit: ; preds = %entry, %no_exit
%indvar = phi uint [ 0, %entry ], [ %indvar.next, %no_exit ] ; <uint> [#uses=2]
%tmp.4 = getelementptr [1000 x int]* %Array, int 0, uint %indvar ; <int*> [#uses=2]
%tmp.7 = load int* %tmp.4 ; <int> [#uses=1]
%tmp.9 = add int %tmp.7, %X ; <int> [#uses=1]
store int %tmp.9, int* %tmp.4
*** %indvar.next = add uint %indvar, 1 ; <uint> [#uses=2]
*** %exitcond = seteq uint %indvar.next, 1000 ; <bool> [#uses=1]
br bool %exitcond, label %return, label %no_exit
and turn it into a loop like this:
no_exit: ; preds = %entry, %no_exit
%indvar = phi uint [ 0, %entry ], [ %indvar.next, %no_exit ] ; <uint> [#uses=3]
%tmp.4 = getelementptr [1000 x int]* %Array, int 0, uint %indvar ; <int*> [#uses=2]
%tmp.7 = load int* %tmp.4 ; <int> [#uses=1]
%tmp.9 = add int %tmp.7, %X ; <int> [#uses=1]
store int %tmp.9, int* %tmp.4
*** %indvar.next = add uint %indvar, 1 ; <uint> [#uses=1]
*** %exitcond = seteq uint %indvar, 999 ; <bool> [#uses=1]
br bool %exitcond, label %return, label %no_exit
Note that indvar.next and indvar can no longer be coallesced. In machine
code terms, this patch changes this code:
.LBBtest_1: # no_exit
mov %EDX, OFFSET Array
mov %ESI, %EAX
add %ESI, DWORD PTR [%EDX + 4*%ECX]
mov %EDX, OFFSET Array
mov DWORD PTR [%EDX + 4*%ECX], %ESI
mov %EDX, %ECX
inc %EDX
cmp %ECX, 999
mov %ECX, %EDX
jne .LBBtest_1 # no_exit
into this:
.LBBtest_1: # no_exit
mov %EDX, OFFSET Array
mov %ESI, %EAX
add %ESI, DWORD PTR [%EDX + 4*%ECX]
mov %EDX, OFFSET Array
mov DWORD PTR [%EDX + 4*%ECX], %ESI
inc %ECX
cmp %ECX, 1000
jne .LBBtest_1 # no_exit
We need better instruction selection to get this:
.LBBtest_1: # no_exit
add DWORD PTR [Array + 4*%ECX], EAX
inc %ECX
cmp %ECX, 1000
jne .LBBtest_1 # no_exit
... but at least there is less register juggling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16473 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-21 21:35:23 +00:00
Chris Lattner
79f0c8e4ee
Fix potential miscompilations: InstCombine/2004-09-20-BadLoadCombine*.llx
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16447 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-20 10:15:10 +00:00
Alkis Evlogimenos
7b6ec600c5
Fix loop condition so that we don't decrement off the beginning of the
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list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16440 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-20 06:42:58 +00:00
Chris Lattner
4b50156049
Prototype these functions more accurately
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16432 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-20 04:43:15 +00:00
Chris Lattner
8a37520f80
Make isSafeToLoadUnconditionally a bit smarter, implementing PR362 and
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Regression/Transforms/InstCombine/CPP_min_max.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16409 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-19 19:18:10 +00:00
Chris Lattner
c10acedb2d
Make instruction combining a bit more aggressive in the face of volatile
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loads, and implement two new transforms: InstCombine/load.ll:test[56].
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16404 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-19 18:43:46 +00:00
Reid Spencer
2da5c3dda6
Convert code to compile with vc7.1.
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Patch contributed by Paolo Invernizzi. Thanks Paolo!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16368 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-15 17:06:42 +00:00
Chris Lattner
bdacd87957
Fix a bug in the previous checkin that broke 255.vortex
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16355 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-15 02:34:40 +00:00
Chris Lattner
fb3ee1930b
Make sure to update alias analysis information as we transform the function.
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This fixes PR420 and Regression/Transforms/LICM/2004-09-14-AliasAnalysisInvalidate.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16348 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-15 01:04:07 +00:00
Chris Lattner
b50f1f13e2
Remove a long-dead pass. Actually, this pass was never used at all.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16337 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-14 16:33:01 +00:00
Alkis Evlogimenos
20aa474f8f
Fixes to make LLVM compile with vc7.1.
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Patch contributed by Paolo Invernizzi!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16152 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-03 18:19:51 +00:00
Reid Spencer
551ccae044
Changes For Bug 352
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Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-01 22:55:40 +00:00
Reid Spencer
42e83feba7
Initial checkin of a pass to lower packed operations to scalars operations.
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This also registers the pass with opt with a -lower-packed command line
option.
Patch contributed by Brad Jones.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15987 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-21 21:39:24 +00:00
Chris Lattner
5dbef2207e
Fix InstCombine/2004-08-10-BoolSetCC.ll, a bug that is miscompiling
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176.gcc. Note that this is apparently not the only bug miscompiling gcc
though. :(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15639 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-11 00:50:51 +00:00
Chris Lattner
b49f306bdf
Fix InstCombine/2004-08-09-RemInfLoop.llx
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This should go into the 1.3 branch
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15593 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-09 21:05:48 +00:00
Alkis Evlogimenos
15876bb28c
Stop using getValues().
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15487 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-04 08:44:43 +00:00
Chris Lattner
1484089bbf
Fix a regression in InstCombine/xor.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15410 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-01 19:42:59 +00:00
Misha Brukman
cb6267bc60
Fix De Morgan's name.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15343 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-30 12:50:08 +00:00
Chris Lattner
acd1f0fcb3
Start using the PatternMatcher a bit.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15342 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-30 07:50:03 +00:00
Misha Brukman
47b14a4a6a
Fix #includes of i*.h => Instructions.h as per PR403.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15334 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-29 17:30:56 +00:00
Misha Brukman
d8e1eea678
Fix #includes of i*.h => Instructions.h as per PR403.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15328 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-29 17:05:13 +00:00
Robert Bocchino
71698285e8
This change fixed a bug in the function visitMul. The prior version
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assumed that a constant on the RHS of a multiplication was either an
IntConstant or an FPConstant. It checked for an IntConstant and then,
if it did not find one, did a hard cast to an FPConstant. That code
would crash if the RHS were a ConstantExpr that was neither an
IntConstant nor an FPConstant. This version replaces the hard cast
with a dyn_cast. It performs the same way for IntConstants and
FPConstants but does nothing, instead of crashing, for constant
expressions.
The regression test for this change is 2004-07-27-ConstantExprMul.ll.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15291 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-27 21:02:21 +00:00
Brian Gaeke
96d4bf7aee
Make the create...() functions for some of these passes return a FunctionPass *.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15276 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-27 17:43:21 +00:00
Chris Lattner
eaa243039b
Fix hoisting of void typed values, e.g. calls
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15263 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-27 07:38:32 +00:00
Chris Lattner
a000279a7d
Implement DeadStoreElim/alloca.llx by observing that allocas are dead at the
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end of the function (either return or unwind)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15232 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 06:14:11 +00:00
Chris Lattner
595ee7ec26
Throttle back indvar substitution from creating multiplies in loops. This is bad bad bad.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15227 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26 02:47:12 +00:00
Chris Lattner
70e9b59b0e
* Substantially simplify how free instructions are handled (potentially fixing
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a bug in DSE).
* Delete dead operand uses iteratively instead of recursively, using a
SetVector.
* Defer deletion of dead operand uses until the end of processing, which means
we don't have to bother with updating the AliasSetTracker. This speeds up
DSE substantially.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15204 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 11:09:56 +00:00
Chris Lattner
a9e2f3d0ab
Free instructions kill values too. This implements DeadStoreElim/free.llx
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15199 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 07:58:38 +00:00
Chris Lattner
c47b6677ae
obvious fix
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15162 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 07:51:27 +00:00
Chris Lattner
0fb56afab1
This is a trivial dead store elimination pass. It very very simple and
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can be improved in many ways. But: stop laughing, even with -basicaa it
deletes 15% of the stores in 252.eon :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15101 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-22 08:00:28 +00:00
Chris Lattner
93c9587fbb
Update GC intrinsics to take a pointer to the object as well as a pointer
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to the field being updated. Patch contributed by Tobias Nurmiranta
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15097 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-22 05:51:13 +00:00
Chris Lattner
f0cacc0ae7
* Further cleanup.
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* Test for whether bits are shifted out during the optzn.
If so, the fold is illegal, though it can be handled explicitly for setne/seteq
This fixes the miscompilation of 254.gap last night, which was a latent bug
exposed by other optimizer improvements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15085 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-21 20:14:10 +00:00
Chris Lattner
5eb919405c
Make cast-cast code a bit more defensive
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"simplify" a bit of code for comparison/and folding
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15082 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-21 19:50:44 +00:00
Chris Lattner
e8a7e593e6
Remove special casing of pointers and treat them generically as integers of
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the appopriate size. This gives us the ability to eliminate int -> ptr -> int
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15063 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-21 04:27:24 +00:00
Chris Lattner
59a20773f8
Implement Transforms/InstCombine/IntPtrCast.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15029 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-20 05:21:00 +00:00
Chris Lattner
67769e5efa
Implement InstCombine/GEPIdxCanon.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15024 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-20 01:48:15 +00:00
Chris Lattner
bee7e7644b
Rewrite cast->cast elimination code completely based on the information we
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actually care about. Someday when the cast instruction is gone, we can do
better here, but this will do for now. This implements
instcombine/cast.ll:test17/18 as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15018 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-20 00:59:32 +00:00
Chris Lattner
9db07b9307
Minor cleanup, no functionality change
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14972 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 18:59:44 +00:00
Reid Spencer
c88920df66
Delete a redundant if branch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14967 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 08:34:52 +00:00
Reid Spencer
c3c2fdf5a8
Expand the coercion of constants to include the newly constant Globals.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14966 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 08:34:19 +00:00
Reid Spencer
5f0eb64079
Delete a no-op loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14965 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 08:32:43 +00:00
Reid Spencer
c3c92d834a
Expand the scope to include global values because they are now constants
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too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14964 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 08:32:10 +00:00
Reid Spencer
8863f1814b
bug 122:
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- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14950 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 00:38:32 +00:00
Reid Spencer
460f16c625
bug 122:
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- Minimize redundant isa<GlobalValue> usage
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14948 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-18 00:32:14 +00:00