1d2c27b23e
Fix PR2002. Suppose n is the initial value for the induction
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variable (with step 1) and m is its final value. Then, the correct trip
count is SMAX(m,n)-n. Previously, we used SMAX(0,m-n), but m-n may
overflow and can't in general be interpreted as signed.
Patch by Nick Lewycky.
llvm-svn: 47007
2008-02-12 15:09:36 +00:00
716c10c01e
Fix for bug 1996: optimize out loads of undef. This code basically just
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checks for a malloc/alloca immediately followed by a load.
llvm-svn: 47006
2008-02-12 12:08:14 +00:00
352acec37e
Update comment.
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llvm-svn: 47002
2008-02-12 07:59:55 +00:00
4d8c98b8f9
Unbreak various insert_vector_elt and extract_vector_elt tests in presence of SSE4.
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llvm-svn: 47001
2008-02-12 07:59:45 +00:00
fd82c308e5
Stuff noticed while grepping code
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llvm-svn: 46979
2008-02-11 23:47:56 +00:00
a6ab6e7adb
Generalize the handling of call and return arguments,
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in preparation for apint support. These changes are
intended to have no functional effect.
llvm-svn: 46967
2008-02-11 20:58:28 +00:00
11f6212bc0
From Chris' review: use isa instead of explicitly using classof.
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llvm-svn: 46964
2008-02-11 19:00:34 +00:00
991056808b
From Chris' review: minor corrections in comments.
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llvm-svn: 46963
2008-02-11 19:00:03 +00:00
54d3b5a1f5
From Chris' review: use cast instead of dyn_cast with an assert.
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llvm-svn: 46962
2008-02-11 18:58:42 +00:00
7b5d916c98
From Chris' review: fix 80 column violations
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llvm-svn: 46961
2008-02-11 18:57:43 +00:00
adae053b53
If the LHS of the comparison is a loop-invariant we also want to move it
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to the RHS. This simple change allows to compute loop iteration count
for loops with condition similar to the one in the testcase (which seems
to be quite common).
llvm-svn: 46959
2008-02-11 18:37:34 +00:00
6f30a0798f
Added "Profile" method to APFloat for use with FoldingSet.
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Added member template "Add" to FoldingSetNodeID that allows "adding" arbitrary
objects to a profile via dispatch to FoldingSetTrait<T>::Profile().
Removed FoldingSetNodeID::AddAPFloat and FoldingSetNodeID::APInt, as their
functionality is now replaced using the above mentioned member template.
llvm-svn: 46957
2008-02-11 17:24:50 +00:00
d2d9764cc8
Fix PR1798 - an error in the evaluation of SCEVAddRecExpr at an
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arbitrary iteration.
The patch:
1) changes SCEVSDivExpr into SCEVUDivExpr,
2) replaces PartialFact() function with BinomialCoefficient(); the
computations (essentially, the division) in BinomialCoefficient() are
performed with the apprioprate bitwidth necessary to avoid overflow;
unsigned division is used instead of the signed one.
Computations in BinomialCoefficient() require support from the code
generator for APInts. Currently, we use a hack rounding up the
neccessary bitwidth to the nearest power of 2. The hack is easy to turn
off in future.
One remaining issue: we assume the divisor of the binomial coefficient
formula can be computed accurately using 16 bits. It means we can handle
AddRecs of length up to 9. In future, we should use APInts to evaluate
the divisor.
Thanks to Nicholas for cooperation!
llvm-svn: 46955
2008-02-11 11:03:14 +00:00
7377f5fbe3
Add a isBigEndian method to complement isLittleEndian.
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llvm-svn: 46954
2008-02-11 10:37:04 +00:00
ad4d57a2f5
Determine whether a spill kills the register it's spilling before insertion rather than trying to undo the kill marker afterwards.
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llvm-svn: 46953
2008-02-11 08:30:52 +00:00
2d77e8e446
Enable SSE4 codegen and pattern matching.
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Add some notes to the README.
llvm-svn: 46949
2008-02-11 04:19:36 +00:00
3090b0fbd1
additional missing feature
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llvm-svn: 46948
2008-02-11 04:16:09 +00:00
dcddd64424
Fix scalarrepl to not 'miscompile' undefined code, part #2 .
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This fixes the store case, my previous patch just fixed the load
case. rdar://5707076.
llvm-svn: 46932
2008-02-10 19:05:37 +00:00
3050f74a1d
xmm0 variable blends
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llvm-svn: 46931
2008-02-10 18:47:57 +00:00
3a4be0fdef
Rename MRegisterInfo to TargetRegisterInfo.
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llvm-svn: 46930
2008-02-10 18:45:23 +00:00
56689502c1
Add truncate and AssertZext result expansion.
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llvm-svn: 46926
2008-02-10 10:08:52 +00:00
9c2ce9a32d
Return "(c1 + c2)" instead of yet another ADD node (which made this a
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no-op).
llvm-svn: 46922
2008-02-10 08:10:24 +00:00
0ededbc68e
add anote
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llvm-svn: 46918
2008-02-10 01:01:35 +00:00
52ea27db17
Match GCC's behaviour for these sections.
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llvm-svn: 46916
2008-02-10 00:03:54 +00:00
727c7634c7
memopv16i8 had wrong alignment requirement, would have broken pabsb
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pabs{b,w,d} are not two address
fix extract-to-mem sse4 ops
add sse4 vector sign extend nodes
llvm-svn: 46915
2008-02-09 23:46:37 +00:00
784d071e16
We should check that existing cast operation has the appropriate opcode before we reuse it.
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llvm-svn: 46908
2008-02-09 18:30:13 +00:00
6aabf837fe
Remove unused hidden option.
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llvm-svn: 46903
2008-02-09 08:36:28 +00:00
6715f755cc
Skeleton of insert and extract matching, more to come
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llvm-svn: 46902
2008-02-09 01:38:08 +00:00
17bedbc500
Tablegen support for insert & extract element matching
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llvm-svn: 46901
2008-02-09 01:37:05 +00:00
7f5c2553c7
check that terminators only occur at the end of a block. This catches the
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common problem of putting two terminators in the same block. I can't write
a testcase for this because the .ll parser rejects this before the verifier
can, but this can occur when generating IR.
llvm-svn: 46900
2008-02-09 01:06:01 +00:00
65f63eba2b
Change ConstantSDNode to store an APInt instead of a uint64_t, and
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begin adding some methods to use it this way.
llvm-svn: 46899
2008-02-08 22:59:30 +00:00
26f75e2576
Fix PR 1995.
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llvm-svn: 46898
2008-02-08 22:49:13 +00:00
f2bd1387b0
Forgot these files.
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llvm-svn: 46896
2008-02-08 22:05:27 +00:00
e460869d86
Also print alignment.
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llvm-svn: 46895
2008-02-08 22:05:07 +00:00
3b3286d4bc
It's not always safe to fold movsd into xorpd, etc. Check the alignment of the load address first to make sure it's 16 byte aligned.
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llvm-svn: 46893
2008-02-08 21:20:40 +00:00
36c2967d89
64-bit (MMX) vectors do not need restrictive alignment.
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128-bit vectors need it only when SSE is on.
llvm-svn: 46890
2008-02-08 19:48:20 +00:00
7a55a94ba1
Avoid needlessly casting away const qualifiers.
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llvm-svn: 46877
2008-02-08 03:29:40 +00:00
140a73efac
Avoid needlessly casting away const qualifiers.
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llvm-svn: 46876
2008-02-08 03:26:46 +00:00
8d59dd119b
Added missing entries in X86 load / store folding tables.
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llvm-svn: 46866
2008-02-08 00:12:56 +00:00
6a80462568
Remove remnant of load folding in local register allocator. Patch by Holger Schurig.
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llvm-svn: 46861
2008-02-07 19:46:55 +00:00
16d4bc3dc0
Follow Chris' suggestion; change the PseudoSourceValue accessors
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to return pointers instead of references, since this is always what
is needed.
llvm-svn: 46857
2008-02-07 18:41:25 +00:00
63a8452e9c
Add SourceValue information for outgoing argument stores on x86.
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llvm-svn: 46854
2008-02-07 16:28:05 +00:00
b781c79d2c
Don't abort if a MemOperand is missing a SourceValue; just print it
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as <unknown>. And make some minor adjustments to the MemOperand
dump format.
llvm-svn: 46853
2008-02-07 16:18:00 +00:00
a20a773654
Fix a x86-64 codegen deficiency. Allow gv + offset when using rip addressing mode.
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Before:
_main:
subq $8, %rsp
leaq _X(%rip), %rax
movsd 8(%rax), %xmm1
movss _X(%rip), %xmm0
call _t
xorl %ecx, %ecx
movl %ecx, %eax
addq $8, %rsp
ret
Now:
_main:
subq $8, %rsp
movsd _X+8(%rip), %xmm1
movss _X(%rip), %xmm0
call _t
xorl %ecx, %ecx
movl %ecx, %eax
addq $8, %rsp
ret
Notice there is another idiotic codegen issue that needs to be fixed asap:
xorl %ecx, %ecx
movl %ecx, %eax
llvm-svn: 46850
2008-02-07 08:53:49 +00:00
1bc1cae318
In some cases, e.g. ADD32ri, no transformation is made. Guide against it.
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llvm-svn: 46849
2008-02-07 08:29:53 +00:00
7c1d787977
Don't make up new directives. (".set_foobar")
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llvm-svn: 46848
2008-02-07 06:36:26 +00:00
b3efe03672
Fix a typo in a comment.
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llvm-svn: 46836
2008-02-07 02:30:40 +00:00
4f26eb7270
Add support to FoldingSet for hashing APInt objects.
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llvm-svn: 46833
2008-02-06 23:09:15 +00:00
2d489b5081
Re-apply the memory operand changes, with a fix for the static
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initializer problem, a minor tweak to the way the
DAGISelEmitter finds load/store nodes, and a renaming of the
new PseudoSourceValue objects.
llvm-svn: 46827
2008-02-06 22:27:42 +00:00
c676a0329c
Temporarily reverting:
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http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20080128/057882.html
This is causing a miscompilation on PPC G5 and just now seeing it on iMac x86-64.
llvm-svn: 46822
2008-02-06 20:03:07 +00:00
Wojciech Matyjewicz