Commit Graph

1404 Commits

Author SHA1 Message Date
Evan Cheng
65cdee3fd4 Cannot use immediate as call absolute target in PIC mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72154 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-20 01:11:00 +00:00
Dan Gohman
04623272d2 Add nounwind to a few tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72002 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-18 15:16:49 +00:00
Jakob Stoklund Olesen
f8eac02fc1 Help DejaGnu avoid pipe-jam by producing less output from certain test cases.
When a test fails with more than a pipeful of output on stdout AND stderr, one
of the DejaGnu programs blocks. The problem can be avoided by redirecting
stdout to a file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71919 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-16 00:34:42 +00:00
Dan Gohman
ebde0c55ce Add nounwind to this test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71734 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-13 22:29:12 +00:00
Evan Cheng
9d3094b38e If header of inner loop is aligned, do not align the outer loop header. We don't want to add nops in the outer loop for the sake of aligning the inner loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71609 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-12 23:58:14 +00:00
Evan Cheng
eca24fba3f Teach TransferDeadness to delete truly dead instructions if they do not produce side effects.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71606 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-12 23:07:00 +00:00
Evan Cheng
17114249fc Add nounwind.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71575 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-12 18:35:43 +00:00
Evan Cheng
1ea7327845 Fixed a stack slot coloring with reg bug: do not update implicit use / def when doing forward / backward propagation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71574 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-12 18:31:57 +00:00
Dan Gohman
81db61a2e6 Factor the code for collecting IV users out of LSR into an IVUsers class,
and generalize it so that it can be used by IndVarSimplify. Implement the
base IndVarSimplify transformation code using IVUsers. This removes
TestOrigIVForWrap and associated code, as ScalarEvolution now has enough
builtin overflow detection and folding logic to handle all the same cases,
and more. Run "opt -iv-users -analyze -disable-output" on your favorite
loop for an example of what IVUsers does.

This lets IndVarSimplify eliminate IV casts and compute trip counts in
more cases. Also, this happens to finally fix the remaining testcases
in PR1301.

Now that IndVarSimplify is being more aggressive, it occasionally runs
into the problem where ScalarEvolutionExpander's code for avoiding
duplicate expansions makes it difficult to ensure that all expanded
instructions dominate all the instructions that will use them. As a
temporary measure, IndVarSimplify now uses a FixUsesBeforeDefs function
to fix up instructions inserted by SCEVExpander. Fortunately, this code
is contained, and can be easily removed once a more comprehensive
solution is available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71535 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-12 02:17:14 +00:00
Evan Cheng
5792f51e12 Teach LSR to optimize more loop exit compares, i.e. change them to use postinc iv value. Previously LSR would only optimize those which are in the loop latch block. However, if LSR can prove it is safe (and profitable), it's now possible to change those not in the latch blocks to use postinc values.
Also, if the compare is the only use, LSR would place the iv increment instruction before the compare instead in the latch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71485 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-11 22:33:01 +00:00
Dale Johannesen
bf06f6a6f1 Fix PR4188. TailMerging can't tolerate inexact
sucessor info.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71478 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-11 21:54:13 +00:00
Dan Gohman
a96f119803 Make this grep line a little more specific so that it doesn't
accidentally match something unrelated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71458 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-11 18:49:56 +00:00
Dan Gohman
4e3fdf2c0f When scalarizing a vector BITCAST, check whether the operand has vector
type, rather than assume that it does. If the operand is not vector, it
shouldn't be run through ScalarizeVectorOp. This fixes one of the
testcases in PR3886.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71453 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-11 18:30:42 +00:00
Dan Gohman
3cd90a18bb Convert a subtract into a negate and an add when it helps x86
address folding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71446 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-11 18:02:53 +00:00
Dale Johannesen
c1acc3f764 Reverse a loop that is counting up to a maximum to
count down to 0 instead, under very restricted
circumstances.  Adjust 4 testcases in which this
optimization fires.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71439 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-11 17:15:42 +00:00
Evan Cheng
f045f80ba9 Enable loop bb placement optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71291 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-08 23:35:49 +00:00
Chris Lattner
4992196322 Fix PR4152: asm constraint validation happens before dag combine, so we
need to work a bit to combine things like (x+c1+c2) into x+c3.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71232 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-08 18:23:14 +00:00
Evan Cheng
45e0010e14 Optimize code placement in loop to eliminate unconditional branches or move unconditional branch to the outside of the loop. e.g.
///       A:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       <fallthrough to B>                                                                                                                                                 
///                                                                                                                                                                          
///       B:  --> loop header                                                                                                                                                
///       ...                                                                                                                                                                
///       jcc <cond> C, [exit]                                                                                                                                               
///                                                                                                                                                                          
///       C:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       jmp B                                                                                                                                                              
///                                                                                                                                                                          
/// ==>                                                                                                                                                                      
///                                                                                                                                                                          
///       A:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       jmp B                                                                                                                                                              
///                                                                                                                                                                          
///       C:  --> new loop header                                                                                                                                            
///       ...                                                                                                                                                                
///       <fallthough to B>                                                                                                                                                  
///                                                                                                                                                                          
///       B:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       jcc <cond> C, [exit] 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71209 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-08 06:34:09 +00:00
Bill Wendling
987a305f4a THis doesn't fail.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71142 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-07 01:41:42 +00:00
Bill Wendling
d0c1f9c932 Temporarily revert r71010. It was causing massive failures during self-hosting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71138 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-07 01:27:25 +00:00
Lang Hames
87e3bcab73 Renamed Spiller classes (plus uses and related files) to VirtRegRewriter.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71057 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-06 02:36:21 +00:00
Evan Cheng
8f18edd8b6 Quotes should be printed before private prefix; some code clean up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71032 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-05 22:50:29 +00:00
Dan Gohman
5412d06e9c If a MachineBasicBlock has multiple ways of reaching another block,
allow it to have multiple CFG edges to that block. This is needed
to allow MachineBasicBlock::isOnlyReachableByFallthrough to work
correctly. This fixes PR4126.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71018 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-05 21:10:19 +00:00
Evan Cheng
f9a9b51429 Enable stack coloring with regs at -O3.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71010 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-05 20:30:36 +00:00
Chris Lattner
1777d0c6c5 Add basic support for code generation of
addrspace(257) -> FS relative on x86.  Patch by Zoltan Varga!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70992 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-05 18:52:19 +00:00
Dan Gohman
7d04e4a7c0 X86FastISel doesn't support the -tailcallopt ABI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70902 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-04 19:50:33 +00:00
Dan Gohman
afc36a9520 Previously, RecursivelyDeleteDeadInstructions provided an option
of returning a list of pointers to Values that are deleted. This was
unsafe, because the pointers in the list are, by nature of what
RecursivelyDeleteDeadInstructions does, always dangling. Replace this
with a simple callback mechanism. This may eventually be removed if
all clients can reasonably be expected to use CallbackVH.

Use this to factor out the dead-phi-cycle-elimination code from LSR
utility function, and generalize it to use the
RecursivelyDeleteTriviallyDeadInstructions utility function.

This makes LSR more aggressive about eliminating dead PHI cycles;
adjust tests to either be less trivial or to simply expect fewer
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70636 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-02 18:29:22 +00:00
Evan Cheng
8c1474050d Mark MOV8mr_NOREX and MOV8rm_NOREX as mayStore / mayLoad respectively.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70461 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-30 00:58:57 +00:00
Chris Lattner
6c147293d6 fix a regression handling indirect results: these need to be considered
memory operands otherwise the writebacks get lost when the inline asm 
doesn't otherwise have side effects.  This fixes rdar://6839427, though
clang really shouldn't generate these anymore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70455 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-30 00:48:50 +00:00
Nate Begeman
ec8eee2d3a Fix infinite recursion in the C++ code which handles movddup by making it unnecessary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70425 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-29 22:47:44 +00:00
Evan Cheng
96f3fd9a7f spillPhysRegAroundRegDefsUses() may have invalidated iterators stored in fixed_ IntervalPtrs. Reset them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70378 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-29 07:16:34 +00:00
Bill Wendling
be8cc2a3de Second attempt:
Massive check in. This changes the "-fast" flag to "-O#" in llc. If you want to
use the old behavior, the flag is -O0. This change allows for finer-grained
control over which optimizations are run at different -O levels.

Most of this work was pretty mechanical. The majority of the fixes came from
verifying that a "fast" variable wasn't used anymore. The JIT still uses a
"Fast" flag. I'll change the JIT with a follow-up patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70343 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-29 00:15:41 +00:00
Anton Korobeynikov
573c92d8ba Properly print 'P' modifier on inline asm memory operands.
This should fix PR3379 and PR4064.
Patch inspired by Edwin Török!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70328 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-28 21:49:33 +00:00
Evan Cheng
30590f5023 Fix PR4034. Bug in LiveInterval::join when it's compacting new valno's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70291 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-28 06:24:09 +00:00
Evan Cheng
e9ccb3a7d4 Fix for PR4051. When 2address pass delete an instruction, update kill info when necessary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70279 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-28 02:12:36 +00:00
Bill Wendling
c69d56f115 r70270 isn't ready yet. Back this out. Sorry for the noise.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70275 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-28 01:04:53 +00:00
Bill Wendling
2e9d5f912a Massive check in. This changes the "-fast" flag to "-O#" in llc. If you want to
use the old behavior, the flag is -O0. This change allows for finer-grained
control over which optimizations are run at different -O levels.

Most of this work was pretty mechanical. The majority of the fixes came from
verifying that a "fast" variable wasn't used anymore. The JIT still uses a
"Fast" flag. I'm not 100% sure if it's necessary to change it there...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70270 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-28 00:21:31 +00:00
Evan Cheng
c45288e06b Fix PR4076. Correctly create live interval of physical register with two-address update.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70245 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 20:42:46 +00:00
Dan Gohman
c7749b747e Permit ChangeCompareStride to rewrite a comparison when the factor
between the comparison's iv stride and the candidate stride is
exactly -1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70244 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 20:35:32 +00:00
Dan Gohman
01ecca20bf Teach getZeroExtendExpr and getSignExtendExpr to use trip-count
information to simplify [sz]ext({a,+,b}) to {zext(a),+,[zs]ext(b)},
as appropriate.

These functions and the trip count code each call into the other, so
this requires careful handling to avoid infinite recursion. During
the initial trip count computation, conservative SCEVs are used,
which are subsequently discarded once the trip count is actually
known.

Among other benefits, this change lets LSR automatically eliminate
some unnecessary zext-inreg and sext-inreg operation where the
operand is an induction variable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70241 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 20:16:15 +00:00
Nate Begeman
9008ca6b6b 2nd attempt, fixing SSE4.1 issues and implementing feedback from duncan.
PR2957

ISD::VECTOR_SHUFFLE now stores an array of integers representing the shuffle
mask internal to the node, rather than taking a BUILD_VECTOR of ConstantSDNodes
as the shuffle mask.  A value of -1 represents UNDEF.

In addition to eliminating the creation of illegal BUILD_VECTORS just to 
represent shuffle masks, we are better about canonicalizing the shuffle mask,
resulting in substantially better code for some classes of shuffles.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70225 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 18:41:29 +00:00
Evan Cheng
d521bc983b Fix PR4056. It's possible a physical register def is dead if its implicit use is deleted by two-address pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70213 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 17:36:47 +00:00
Dan Gohman
f45728dae3 Fix the syntax for a PR number in a test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70208 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 15:08:34 +00:00
Dan Gohman
c7b3444095 When transforming sext(trunc(load(x))) into sext(smaller load(x)),
the trunc is directly replaced with the smaller load, so don't
try to create a new sext node. This fixes PR4050.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70179 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27 02:00:55 +00:00
Evan Cheng
0adb527d16 Do not share a single unknown val# for all the live ranges merged into a physical sub-register live interval. When coalescer is merging in clobbered virtaul register live interval into a physical register live interval, give each virtual register val# a separate val# in the physical register live interval. Otherwise, the coalescer would have lost track of the definitions information it needs to make correct coalescing decisions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70026 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-25 09:25:19 +00:00
Rafael Espindola
15f1b66d64 Fix PR 4004 by including the call to __tls_get_addr in X86tlsaddr. This is not
very elegant, but neither is the tls specification :-(



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69968 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-24 12:59:40 +00:00
Rafael Espindola
15684b2955 Revert 69952. Causes testsuite failures on linux x86-64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69967 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-24 12:40:33 +00:00
Nate Begeman
b706d29f9c PR2957
ISD::VECTOR_SHUFFLE now stores an array of integers representing the shuffle
mask internal to the node, rather than taking a BUILD_VECTOR of ConstantSDNodes
as the shuffle mask.  A value of -1 represents UNDEF.

In addition to eliminating the creation of illegal BUILD_VECTORS just to 
represent shuffle masks, we are better about canonicalizing the shuffle mask,
resulting in substantially better code for some classes of shuffles.

A clean up of x86 shuffle code, and some canonicalizing in DAGCombiner is next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69952 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-24 03:42:54 +00:00
Dan Gohman
e41bc94bb1 Explicitly pass -tailcallopt=false to these tests so that they
work as intended no matter what the default setting of that
option is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69911 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-23 19:39:41 +00:00
Evan Cheng
5b69ebac85 It has finally happened. Spiller is now using live interval info.
This fixes a very subtle bug. vr defined by an implicit_def is allowed overlap with any register since it doesn't actually modify anything. However, if it's used as a two-address use, its live range can be extended and it can be spilled. The spiller must take care not to emit a reload for the vn number that's defined by the implicit_def. This is both a correctness and performance issue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69743 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-21 22:46:52 +00:00