cf194e9a27
Cast to remove warning about comparing signed and unsigned.
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llvm-svn: 59518
2008-11-18 10:57:27 +00:00
f1e9329209
Give SIToFPInst preference over UIToFPInst because it is faster on platforms that are widely used.
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llvm-svn: 59476
2008-11-18 00:40:02 +00:00
180afd2c55
While handling floating point IVs lift restrictions on initial value and increment value.
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llvm-svn: 59471
2008-11-17 23:27:13 +00:00
aa3d68d301
Handle floating point ivs during doInitialization().
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llvm-svn: 59466
2008-11-17 21:32:02 +00:00
7917b43a28
eliminate some std::set's.
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llvm-svn: 59409
2008-11-16 07:17:51 +00:00
44152742a0
simplify a bunch more instcombines to use m_Specific etc.
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llvm-svn: 59403
2008-11-16 05:38:51 +00:00
d397fef50d
factor the code for simplifying (icmp)|(icmp) into its own function.
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llvm-svn: 59402
2008-11-16 05:20:07 +00:00
909b969b18
do some computation with apints instead of ConstantInts.
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llvm-svn: 59401
2008-11-16 05:14:43 +00:00
feaea9bdf7
merge a check into a place where it is simpler.
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llvm-svn: 59400
2008-11-16 05:10:52 +00:00
269cbd5770
factor a whole bunch of code out into a helper function.
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llvm-svn: 59398
2008-11-16 05:06:21 +00:00
b37b6e7e96
simplify the conditions on two gigantic if's, decreasing indentation
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a bit. Next step is to factor out into their own helper functions.
llvm-svn: 59397
2008-11-16 04:55:20 +00:00
f1be285134
simplify some instcombine matches by using m_Specific
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llvm-svn: 59395
2008-11-16 04:46:19 +00:00
fae5e33111
Use new m_SelectCst template to eliminate macros.
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llvm-svn: 59392
2008-11-16 04:33:38 +00:00
569d78cbb5
simplify code.
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llvm-svn: 59390
2008-11-16 04:26:55 +00:00
c3f3b059d0
Handle the case where there is no "not". It is possible it got
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folded into the select.
llvm-svn: 59389
2008-11-16 04:25:26 +00:00
5f6d9a313b
factor a bunch of copy/paste code out into a helper function.
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Eliminate the cases checking for cond?0:-1, since that is already
handled by commutative checking.
llvm-svn: 59388
2008-11-16 04:24:12 +00:00
68d2da2a19
rearrange some code, no functionality change.
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llvm-svn: 59381
2008-11-16 03:56:24 +00:00
e02c7c7ad2
if we're going to use a macro, use it maximally. no functionality change.
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llvm-svn: 59380
2008-11-16 03:54:57 +00:00
53b39b5467
Cleanup debug info. assocated with deleted instructions.
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llvm-svn: 59012
2008-11-11 00:54:10 +00:00
d0ce981372
If the sign of exit condition and split condition does not match
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then do not split loop index.
llvm-svn: 58995
2008-11-10 19:48:34 +00:00
7ef7314d1a
Third time's a charm.
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The previous patches didn't match correctly. Also, we need to make sure that
the conditional is the same before doing the transformation.
llvm-svn: 58978
2008-11-10 06:59:06 +00:00
25f0106fd9
Added support for the following definition of shufflevector
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<result> = shufflevector <n x <ty>> <v1>, <n x <ty>> <v2>, <m x i32> <mask>
llvm-svn: 58964
2008-11-10 04:46:22 +00:00
4fb13c051d
Correction for the last patch. Should match the conditional in the first part
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of the select match, not the select instruction itself.
llvm-svn: 58947
2008-11-09 23:37:53 +00:00
1579287550
The method of doing the matching with a 'select' instruction was wrong. The
...
original code was matching like this:
if (match(A, m_Not(m_Value(B))))
B was already matched as a 'select' instruction. However, this isn't matching
what we think it's matching. It would match B as a 'Value', so basically
anything would match to it. In this case, a Constant matched. B was replaced
with a constant representation. And then the wrong value would be used in the
SelectInst::Create statement, causing a crash.
After thinking on this for a moment, and after Nick L. told me how the pattern
matching stuff was supposed to work, the solution was to match NOT an m_Value,
but an m_Select.
llvm-svn: 58946
2008-11-09 23:17:42 +00:00
2e42927e7c
fix leakage of ValueNumbering
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llvm-svn: 58933
2008-11-09 12:45:23 +00:00
3f547be28f
If the LHS of the FCMP is coming from a UIToFP instruction, then we don't want
...
to generate signed ICMP instructions to replace the FCMP. This would violate
the following:
define i1 @test1(i32 %val) {
%1 = uitofp i32 %val to double
%2 = fcmp ole double %1, 0.000000e+00
ret i1 %2
}
would be transformed into:
define i1 @test1(i32 %val) {
%1 = icmp slt i33 %val, 1
ret i1 %1
}
which is obviously wrong. This patch modifes InstCombiner::FoldFCmp_IntToFP_Cst
to handle when the LHS comes from UIToFP.
llvm-svn: 58929
2008-11-09 04:26:50 +00:00
5ca2ec65bd
Fixed scalarizing an extract subvector and prevent an infinite loop
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when simplify a vector.
llvm-svn: 58820
2008-11-06 22:52:21 +00:00
076e048cf7
CMake: updated list of source files.
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llvm-svn: 58736
2008-11-05 00:11:22 +00:00
8cdea717a3
Add a new pass to simplify specific half_powr function calls. This is
...
a specialized pass that it not likely to be generally useful.
llvm-svn: 58732
2008-11-04 23:41:45 +00:00
0a7b4f5800
Allow SROA of vectors. Removing this caused a
...
huge performance regression in something we care
about. This may not be final fix.
llvm-svn: 58718
2008-11-04 20:54:03 +00:00
fe57d109b6
Ignore conditions that are outside the loop.
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llvm-svn: 58631
2008-11-03 19:38:07 +00:00
c1631db93b
Turn floating point IVs into integer IVs where possible.
...
This allows SCEV users to effectively calculate trip count.
LSR later on transforms back integer IVs to floating point IVs
later on to avoid int-to-float casts inside the loop.
llvm-svn: 58625
2008-11-03 18:32:19 +00:00
d73806a9cc
Replace explicit loop with utility function.
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llvm-svn: 58593
2008-11-03 03:49:14 +00:00
8d8acf327b
Fix demanded bits analysis with srem by negative number. Based on a patch
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by Richard Osborne.
llvm-svn: 58555
2008-11-02 02:41:50 +00:00
83eea0b17f
Fix this recently moved code to use the correct type. CI is now a
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ConstantInt, and SI is the original cast instruction. This fixes
PR2996.
llvm-svn: 58549
2008-11-02 00:17:33 +00:00
13cbcf1c18
Canonicalize sext(i1) to i1?-1:0, and update various instcombine
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optimizations accordingly.
llvm-svn: 58457
2008-10-30 20:40:10 +00:00
2c34c130bf
(A & sext(C)) | (B & ~sext(C) -> C ? A : B
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llvm-svn: 58351
2008-10-28 22:38:57 +00:00
f6e4dca67e
Add value range analyzing of Add and Sub.
...
Understand that mul %x, 1 = %x.
llvm-svn: 58069
2008-10-24 04:00:26 +00:00
7f39e2d85a
Change create*Pass factory functions to return Pass* instead of
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LoopPass*.
- Although less precise, this means they can be used in clients
without RTTI (who would otherwise need to include LoopPass.h, which
eventually includes things using dynamic_cast). This was the
simplest solution that presented itself, but I am happy to use a
better one if available.
llvm-svn: 58010
2008-10-22 23:32:42 +00:00
215742a966
Use 0 instead of false to return a null pointer.
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llvm-svn: 57660
2008-10-17 00:56:52 +00:00
bc0278400c
Teach instcombine's visitLoad to scan back several instructions
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to find opportunities for store-to-load forwarding or load CSE,
in the same way that visitStore scans back to do DSE. Also, define
a new helper function for testing whether the addresses of two
memory accesses are known to have the same value, and use it in
both visitStore and visitLoad.
These two changes allow instcombine to eliminate loads in code
produced by front-ends that frequently emit obviously redundant
addressing for memory references.
llvm-svn: 57608
2008-10-15 23:19:35 +00:00
d885f6e139
Combine (fcmp cc0 x, y) | (fcmp cc1 x, y) into a single fcmp when possible.
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llvm-svn: 57515
2008-10-14 18:44:08 +00:00
ce70752b11
- Somehow I forgot about one / une.
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- Renumber fcmp predicates to match their icmp counterparts.
- Try swapping operands to expose more optimization opportunities.
llvm-svn: 57513
2008-10-14 18:13:38 +00:00
67786cce66
Optimize anding of two fcmp into a single fcmp if the operands are the same. e.g. uno && ueq -> ueq
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ord && olt -> olt
ord && ueq -> oeq
llvm-svn: 57507
2008-10-14 17:15:11 +00:00
f7d3cb5435
Make InstructionCombining::getBitCastOperand() recognize GEP instructions and
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constant expression with all zero indices as being the same as a bitcast.
llvm-svn: 57442
2008-10-13 15:17:01 +00:00
da435910e8
Fix PR2697 by rewriting the '(X / pos) op neg' logic. This also changes
...
a couple other cases for clarity, but shouldn't affect correctness.
Patch by Eli Friedman!
llvm-svn: 57387
2008-10-11 22:55:00 +00:00
647a1e532b
Check loop exit predicate properly while eliminating one iteration loop.
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This patch fixes PR 2869
llvm-svn: 57369
2008-10-10 22:02:57 +00:00
e3127f3f80
fix memleak by cleaning the global sets on pass exit
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llvm-svn: 57353
2008-10-10 16:25:50 +00:00
4f0bd68cfe
Add a "loses information" return value to APFloat::convert
...
and APFloat::convertToInteger. Restore return value to
IEEE754. Adjust all users accordingly.
llvm-svn: 57329
2008-10-09 23:00:39 +00:00
26ff6f9c54
Add <cstdio> include where needed by gcc-4.4.
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Patch by Samuel Tardieu.
llvm-svn: 57291
2008-10-08 07:23:46 +00:00
Bill Wendling