Chris Lattner
4956a32c9e
Fix another really nasty regression that Anshu pointed out. In cases where
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dangling constant users were removed from a function, causing it to be dead,
we never removed the call graph edge from the external node to the function.
In most cases, this didn't cause a problem (by luck). This should definitely
go into 1.3
llvm-svn: 15570
2004-08-08 03:29:50 +00:00
Chris Lattner
92b9906199
Two fixes:
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1. Fix a REALLY nasty cyclic replacement issue that Anshu discovered, causing
nondeterminstic crashes and memory corruption.
2. For performance, don't go inserting constantexpr casts of GV pointers.
This should definitely go into 1.3
llvm-svn: 15568
2004-08-08 01:30:07 +00:00
Chris Lattner
6a93462144
This DEBUG is buggy. comment it out because it's not worth fixing. This
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should go into 1.3
llvm-svn: 15567
2004-08-08 01:27:56 +00:00
Alkis Evlogimenos
832437255d
Stop using getValues().
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llvm-svn: 15487
2004-08-04 08:44:43 +00:00
Chris Lattner
7aa2d4747a
Fix a regression in InstCombine/xor.ll
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llvm-svn: 15410
2004-08-01 19:42:59 +00:00
Chris Lattner
7471b96a05
Expose this as a functionpass
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llvm-svn: 15369
2004-07-31 10:01:58 +00:00
Misha Brukman
9c003d8f65
Fix De Morgan's name.
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llvm-svn: 15343
2004-07-30 12:50:08 +00:00
Chris Lattner
d4252a7c64
Start using the PatternMatcher a bit.
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llvm-svn: 15342
2004-07-30 07:50:03 +00:00
Misha Brukman
f4a410f907
Fix #includes of i*.h => Instructions.h as per PR403.
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llvm-svn: 15337
2004-07-29 17:30:57 +00:00
Misha Brukman
63b38bd2ed
Fix #includes of i*.h => Instructions.h as per PR403.
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llvm-svn: 15334
2004-07-29 17:30:56 +00:00
Misha Brukman
2b3387a6d9
Fix #includes of i*.h => Instructions.h as per PR403.
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llvm-svn: 15328
2004-07-29 17:05:13 +00:00
Alkis Evlogimenos
fd7a2d4477
Merge i*.h headers into Instructions.h as part of bug403.
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llvm-svn: 15325
2004-07-29 12:17:34 +00:00
Robert Bocchino
7b5b86cd0f
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.
llvm-svn: 15291
2004-07-27 21:02:21 +00:00
Brian Gaeke
38b79e8fbc
Make the create...() functions for some of these passes return a FunctionPass *.
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llvm-svn: 15276
2004-07-27 17:43:21 +00:00
Chris Lattner
50eb771d37
Fix hoisting of void typed values, e.g. calls
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llvm-svn: 15263
2004-07-27 07:38:32 +00:00
Chris Lattner
f29807169a
Implement DeadStoreElim/alloca.llx by observing that allocas are dead at the
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end of the function (either return or unwind)
llvm-svn: 15232
2004-07-26 06:14:11 +00:00
Chris Lattner
e5ad26dbb3
Throttle back indvar substitution from creating multiplies in loops. This is bad bad bad.
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llvm-svn: 15227
2004-07-26 02:47:12 +00:00
Chris Lattner
7b25bcdf52
* 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.
llvm-svn: 15204
2004-07-25 11:09:56 +00:00
Chris Lattner
4c1c1ac7e4
Free instructions kill values too. This implements DeadStoreElim/free.llx
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llvm-svn: 15199
2004-07-25 07:58:38 +00:00
Chris Lattner
bad6478b00
obvious fix
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llvm-svn: 15162
2004-07-24 07:51:27 +00:00
Chris Lattner
3844c300de
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 :)
llvm-svn: 15101
2004-07-22 08:00:28 +00:00
Chris Lattner
51f7c9e56d
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
llvm-svn: 15097
2004-07-22 05:51:13 +00:00
Brian Gaeke
902dcf0729
These files don't need to include <iostream> since they include "Support/Debug.h".
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llvm-svn: 15089
2004-07-21 20:50:33 +00:00
Chris Lattner
d8f5e2ccac
* 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.
llvm-svn: 15085
2004-07-21 20:14:10 +00:00
Chris Lattner
1638de4499
Make cast-cast code a bit more defensive
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"simplify" a bit of code for comparison/and folding
llvm-svn: 15082
2004-07-21 19:50:44 +00:00
Chris Lattner
4fbad968f8
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
llvm-svn: 15063
2004-07-21 04:27:24 +00:00
Chris Lattner
45b50d14c9
Fix a serious code pessimization problem. If an inlined function has a single
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return, clone the 'ret' BB code into the block AFTER the inlined call, not the
other way around.
llvm-svn: 15030
2004-07-20 05:45:24 +00:00
Chris Lattner
11ffd59e37
Implement Transforms/InstCombine/IntPtrCast.ll
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llvm-svn: 15029
2004-07-20 05:21:00 +00:00
Chris Lattner
ec67df0ed1
Ignore instructions that are in trivially dead functions. This allows us
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to constify 14 globals instead of 4 in a trivial C++ testcase.
llvm-svn: 15027
2004-07-20 03:58:07 +00:00
Chris Lattner
44d0b9502a
Implement InstCombine/GEPIdxCanon.ll
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llvm-svn: 15024
2004-07-20 01:48:15 +00:00
Chris Lattner
5823ac1c21
Implement SimplifyCFG/BrUnwind.ll
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llvm-svn: 15022
2004-07-20 01:17:38 +00:00
Chris Lattner
4e2dbc6b4a
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.
llvm-svn: 15018
2004-07-20 00:59:32 +00:00
Chris Lattner
e2774757fe
Fix a performance regression from the CPR patch, simplify code
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llvm-svn: 14974
2004-07-18 21:34:16 +00:00
Chris Lattner
d47504d9db
Strip out and simplify some code. This also fixes the regression last
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night compiling cfrac. It did not realize that code like this:
int G; int *H = &G;
takes the address of G.
llvm-svn: 14973
2004-07-18 19:56:20 +00:00
Chris Lattner
f3edc49ae2
Minor cleanup, no functionality change
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llvm-svn: 14972
2004-07-18 18:59:44 +00:00
Reid Spencer
3b4e83ec83
Remove an if statement that would never be reached.
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llvm-svn: 14968
2004-07-18 08:41:47 +00:00
Reid Spencer
f0a5bcaae4
Delete a redundant if branch.
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llvm-svn: 14967
2004-07-18 08:34:52 +00:00
Reid Spencer
c44cb6bd9f
Expand the coercion of constants to include the newly constant Globals.
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llvm-svn: 14966
2004-07-18 08:34:19 +00:00
Reid Spencer
539429d9b5
Delete a no-op loop.
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llvm-svn: 14965
2004-07-18 08:32:43 +00:00
Reid Spencer
6c2b627e23
Expand the scope to include global values because they are now constants
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too.
llvm-svn: 14964
2004-07-18 08:32:10 +00:00
Reid Spencer
199aeb7f59
Avoid an unnecessary isa<Constant>.
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llvm-svn: 14963
2004-07-18 08:31:18 +00:00
Chris Lattner
9238d78dc3
Remove useless statistic, fix some slightly broken logic
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llvm-svn: 14958
2004-07-18 07:22:58 +00:00
Chris Lattner
2da5eee33c
Fix a rather serious bug in previous checkin
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llvm-svn: 14957
2004-07-18 06:56:58 +00:00
Reid Spencer
cb3fb5d4f5
bug 122:
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- Replace ConstantPointerRef usage with GlobalValue usage
llvm-svn: 14953
2004-07-18 00:44:37 +00:00
Reid Spencer
874368790f
bug 122:
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- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
llvm-svn: 14950
2004-07-18 00:38:32 +00:00
Reid Spencer
ef784f01dd
bug 122:
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- Minimize redundant isa<GlobalValue> usage
llvm-svn: 14948
2004-07-18 00:32:14 +00:00
Reid Spencer
c5afc9512b
bug 122:
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- Replace ConstantPointerRef usage with GlobalValue usage
- Correct isa<Constant> for GlobalValue subclass
llvm-svn: 14947
2004-07-18 00:31:05 +00:00
Reid Spencer
9e855c6832
bug 122:
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- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
llvm-svn: 14946
2004-07-18 00:29:57 +00:00
Reid Spencer
5f6815980b
bug 122:
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- Replace ConstantPointerRef usage with GlobalValue usage
- Rename methods to get ride of ConstantPointerRef usage
llvm-svn: 14945
2004-07-18 00:25:04 +00:00
Reid Spencer
83cae64faf
bug 122:
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- Excise dead CPR procesing.
llvm-svn: 14944
2004-07-18 00:23:51 +00:00