821deeeffa
Implement folding of switch instructions.
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Implements SimplifyCFG/2003-08-17-FoldSwitch.ll
llvm-svn: 7923
2003-08-17 20:21:14 +00:00
031340a551
Fix bug: SimplifyCFG/2003-08-17-BranchFoldOrdering.ll
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llvm-svn: 7921
2003-08-17 19:41:53 +00:00
4b7e3364c7
The fixme is irrelevant: if that happens, the LLVM bytecode is malformed.
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This fixes testcase: SimplifyCFG/2003-08-17-BranchFold.ll
llvm-svn: 7919
2003-08-17 19:34:55 +00:00
8c14ba96ca
Factory methods for function passes now return type FunctionPass *.
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llvm-svn: 7839
2003-08-14 06:09:32 +00:00
cbf0839a03
Fix FIXME by removing FIXME
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llvm-svn: 7832
2003-08-13 22:15:04 +00:00
3ac7c26a1c
Implement instcombine optimizations:
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(A <setcc1> B) logicalop (A <setcc2> B) -> (A <setcc3> B) or true or false
Where setcc[123] is one of the 6 setcc instructions, and logicalop is one of: And, Or, Xor
llvm-svn: 7828
2003-08-13 20:16:26 +00:00
b8b97505ba
Generalize some of the add tests to allow for reassociation to take place
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llvm-svn: 7825
2003-08-13 19:01:45 +00:00
89207943a1
Factory methods for FunctionPasses now return type FunctionPass *.
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llvm-svn: 7823
2003-08-13 18:18:15 +00:00
8ac196dd3b
Assign arguments different ranks so they get grouped together
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llvm-svn: 7813
2003-08-13 16:16:26 +00:00
35364c8408
Removing the pool allocator from the main CVS tree.
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Use the poolalloc module in CVS from now on.
llvm-svn: 7810
2003-08-13 15:36:15 +00:00
d07283a2ad
Implement InstCombine/2003-08-12-AllocaNonNull.ll
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llvm-svn: 7807
2003-08-13 05:38:46 +00:00
c992add9fe
Do not cannonicalize (X != 0) into (cast X to bool)
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llvm-svn: 7806
2003-08-13 05:33:12 +00:00
ede3fe05c5
Change cannonicalization rules: add X,X is represented as multiplies, multiplies
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of a power of two are represented as a shift.
llvm-svn: 7803
2003-08-13 04:18:28 +00:00
709a16a0bc
Give std::map<BasicBlock *, BasicBlock *> the short name BBMap, because
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it's used 7 different times.
Rename `getBackEdges' to `findAndInstrumentBackEdges', for clarity.
Remove some excess whitespace and commented-out code.
Use shorter forms of CallInst ctors.
Do not make `reopt_threshold' visible to the LLVM program, and do not
pass it to the call to `reoptimizerInitialize'. Don't pass the
GlobalVariable representing it to any of our helper methods.
`reopt_threshold' is an internal parameter of the reoptimizer, which
InstLoops does not need to know about.
llvm-svn: 7794
2003-08-12 22:00:24 +00:00
deaa0dd71a
Allow pulling logical operations through shifts.
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This implements InstCombine/shift.ll:test14*
llvm-svn: 7793
2003-08-12 21:53:41 +00:00
98b3ecddec
Fix bug: Reassociate/2003-08-12-InfiniteLoop.ll
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llvm-svn: 7792
2003-08-12 21:45:24 +00:00
58c7eb60ec
Assign finer grained ranks, make sure to reassociate top-level after reassociating bottom level
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llvm-svn: 7787
2003-08-12 20:14:27 +00:00
01d5639515
Simplify code
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llvm-svn: 7783
2003-08-12 19:17:27 +00:00
812aab7727
Implement testcases InstCombine/or.ll:test16/test17
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llvm-svn: 7782
2003-08-12 19:11:07 +00:00
46d9b22e90
Bug fix: Some nodes pointed to by globals may not be marked incomplete and need to be tracked to find pool arguments
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llvm-svn: 7763
2003-08-12 00:45:13 +00:00
603e0076c0
Fix handling of 'free' if it has absolutely no prototype
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llvm-svn: 7721
2003-08-11 15:05:08 +00:00
449670a8f7
Fixed a segfault in gccld.
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The original code does not work because the value from WorkList.end() is
invalidated once WorkList.erase() is called. To ensure proper functionality,
we must ensure that WorkList.erase() is always called before WorkList.end().
llvm-svn: 7673
2003-08-07 14:43:13 +00:00
0b83080595
Added code for pool allocating only the pool-allocatable data structures in the presence of collapsed nodes + a couple of bug fixes
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llvm-svn: 7662
2003-08-07 05:29:28 +00:00
c592c9f8a3
Remove unnecessary use of NonCopyable
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llvm-svn: 7641
2003-08-06 17:16:24 +00:00
dc3c9a8545
Fixed minor bug in SafeToHoist and made some changes suggested by Chris.
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llvm-svn: 7614
2003-08-05 20:39:02 +00:00
57c03df032
Fixed LICM bug that hoists trapping instructions that are not guaranteed to execute.
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llvm-svn: 7612
2003-08-05 18:45:46 +00:00
adc5a89a3b
Minor changes:
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* Expand most tabs into spaces
* Move #define DEBUG_TYPE to top of file to avoid warning
llvm-svn: 7611
2003-08-05 18:44:12 +00:00
0383a65103
Major bug fixes including a memory leak and tracking some exceptional conditions. Also added support for including global and indirect call information in the DS graphs used by the pool allocation
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llvm-svn: 7605
2003-08-05 17:01:54 +00:00
edc8c54e16
Fix bug: SimplifyCFG/2003-08-05-InvokeCrash.ll
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Fix bug: SimplifyCFG/2003-08-05-MishandleInvoke.ll
llvm-svn: 7599
2003-08-05 16:27:44 +00:00
8abcd56c74
DEBUG got moved to Support/Debug.h
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llvm-svn: 7492
2003-08-01 22:15:03 +00:00
ab780dfab5
Instcombine: (A >> c1) << c2 for signed integers
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llvm-svn: 7295
2003-07-24 18:38:56 +00:00
3204d4ed4e
Reorganization of code, no functional changes.
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Now it shoudl be a bit more efficient
llvm-svn: 7292
2003-07-24 17:52:58 +00:00
dfae8be3c9
Allow folding several instructions into casts, which can simplify a lot
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of codes. For example,
short kernel (short t1) {
t1 >>= 8; t1 <<= 8;
return t1;
}
became:
short %kernel(short %t1.1) {
%tmp.3 = shr short %t1.1, ubyte 8 ; <short> [#uses=1]
%tmp.5 = cast short %tmp.3 to int ; <int> [#uses=1]
%tmp.7 = shl int %tmp.5, ubyte 8 ; <int> [#uses=1]
%tmp.8 = cast int %tmp.7 to short ; <short> [#uses=1]
ret short %tmp.8
}
before, now it becomes:
short %kernel(short %t1.1) {
%tmp.3 = shr short %t1.1, ubyte 8 ; <short> [#uses=1]
%tmp.8 = shl short %tmp.3, ubyte 8 ; <short> [#uses=1]
ret short %tmp.8
}
which will become:
short %kernel(short %t1.1) {
%tmp.3 = and short %t1.1, 0xFF00
ret short %tmp.3
}
This implements cast-set.ll:test4 and test5
llvm-svn: 7290
2003-07-24 17:35:25 +00:00
727c03a665
Minor cleanups
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llvm-svn: 7289
2003-07-24 17:31:56 +00:00
e9340228c9
Fix bug: FunctionResolve/2003-07-23-CPR-Reference.ll
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This fixes a long time annoyance which caused prototypes for bzero, bcopy,
bcmp, fputs, and fputs_unlocked to never get deleted. Grr.
llvm-svn: 7285
2003-07-23 22:03:18 +00:00
bfb1d03159
Add comments
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llvm-svn: 7283
2003-07-23 21:41:57 +00:00
9763859e8d
Remove explicit check for: not (not X) = X, it is already handled because xor is commutative
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- InstCombine: (X & C1) ^ C2 --> (X & C1) | C2 iff (C1&C2) == 0
- InstCombine: (X | C1) ^ C2 --> (X | C1) & ~C2 iff (C1&C2) == C2
llvm-svn: 7282
2003-07-23 21:37:07 +00:00
33217db4d9
InstCombine: (X ^ C1) & C2 --> (X & C2) iff (C1&C2) == 0
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llvm-svn: 7272
2003-07-23 19:36:21 +00:00
16464b36ff
- InstCombine: (X | C1) & C2 --> X & C2 iff C1 & C1 == 0
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- InstCombine: (X | C) & C --> C
- InstCombine: (X | C1) & C2 --> (X | (C1&C2)) & C2
llvm-svn: 7269
2003-07-23 19:25:52 +00:00
8f0d15601a
IC: (X & C1) | C2 --> (X | C2) & (C1|C2)
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IC: (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
We are now guaranteed that all 'or's will be inside of 'and's, and all 'and's
will be inside of 'xor's, if the second operands are constants.
llvm-svn: 7264
2003-07-23 18:29:44 +00:00
49b47ae565
IC: (X ^ C1) & C2 --> (X & C2) ^ (C1&C2)
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Minor code cleanup
llvm-svn: 7262
2003-07-23 17:57:01 +00:00
cfbce7c880
InstCombine: (X ^ 4) == 8 --> X == 12
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llvm-svn: 7260
2003-07-23 17:26:36 +00:00
d492a0b7b4
IC: (X & 5) == 13 --> false
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IC: (X | 8) == 4 --> false
llvm-svn: 7257
2003-07-23 17:02:11 +00:00
6077c3195f
Simplify code by using ConstantInt::getRawValue instead of checking to see
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whether the constant is signed or unsigned, then casting
llvm-svn: 7252
2003-07-23 15:22:26 +00:00
d78ebd0c6b
Fix bug: TailDup/2003-07-22-InfiniteLoop.ll
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llvm-svn: 7243
2003-07-23 03:32:41 +00:00
bdb0ce0605
- InstCombine (cast (xor A, B) to bool) ==> (setne A, B)
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- InstCombine (cast (and X, (1 << size(X)-1)) to bool) ==> x < 0
llvm-svn: 7241
2003-07-22 21:46:59 +00:00
d6dcbc6ce8
Added code that checks to see if a global variable is external before replacing
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a load of the global variable with the variable's constant value.
llvm-svn: 7216
2003-07-21 19:42:57 +00:00
1db75a0f7c
Added check for inlinable function
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llvm-svn: 7206
2003-07-18 20:55:26 +00:00
89233e1c9a
A pass to combine multiple backedges that go to same target
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llvm-svn: 7201
2003-07-18 16:08:32 +00:00
0643ceafcf
Dinakar and I fixed a bug where we were trying to get the initializer of
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an external constant. Since external constants don't have initializers, we
were failing on an assert() call in llvm/GlobalVariable.h.
llvm-svn: 7193
2003-07-17 19:06:55 +00:00
Chris Lattner