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23535 Commits

Author SHA1 Message Date
Chris Lattner
2b67ff8632 when we know the signbit of an input to uint_to_fp is zero, 
change it to sint_to_fp on targets where that is cheaper (and
visaversa of course).  This allows us to compile uint_to_fp to:

_test:
	movl	4(%esp), %eax
	shrl	$23, %eax
	cvtsi2ss	%eax, %xmm0
	movl	8(%esp), %eax
	movss	%xmm0, (%eax)
	ret

instead of:

	.align	3
LCPI1_0:					##  double
	.long	0	## double least significant word 4.5036e+15
	.long	1127219200	## double most significant word 4.5036e+15
	.text
	.align	4,0x90
	.globl	_test
_test:
	subl	$12, %esp
	movl	16(%esp), %eax
	shrl	$23, %eax
	movl	%eax, (%esp)
	movl	$1127219200, 4(%esp)
	movsd	(%esp), %xmm0
	subsd	LCPI1_0, %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movl	20(%esp), %eax
	movss	%xmm0, (%eax)
	addl	$12, %esp
	ret

llvm-svn: 52747
 2008-06-26 00:16:49 +00:00
Owen Anderson
68f11ecb86 Remember which MachineOperand we were processing, so we don't have to scan the list to find it again later. 
This speeds up live intervals from 0.37s to 0.30s on instcombine.

llvm-svn: 52745
 2008-06-25 23:39:39 +00:00
Dan Gohman
d1467012f5 Fix the text in an assert string. 
llvm-svn: 52744
 2008-06-25 22:14:43 +00:00
Evan Cheng
71fbfe73c1 - Fix a x86 vector isel bug: illegal transformation of a vector_shuffle into a 
shift.
- Add a readme entry for a missing vector_shuffle optimization that results in
  awful codegen.

llvm-svn: 52740
 2008-06-25 20:52:59 +00:00
Duncan Sands
12c1bee452 Add support for expanding PPC 128 bit floats. 
For this it is convenient to permit floats to
be used with EXTRACT_ELEMENT, so I tweaked
things to allow that.  I also added libcalls
for ppcf128 to i32 forms of FP_TO_XINT, since
they exist in libgcc and this case can certainly
occur (and does occur in the testsuite) - before
the i64 libcall was being used.  Also, the
XINT_TO_FP result seemed to be wrong when
the argument is an i128: the wrong fudge
factor was added (the i32 and i64 cases were
handled directly, but the i128 code fell
through to some generic softening code which
seemed to think it was i64 to f32!).  So I
fixed it by adding a fudge factor that I
found in my breakfast cereal.

llvm-svn: 52739
 2008-06-25 20:24:48 +00:00
Chris Lattner
9c5a1a7da3 Implement JIT support for global aliases, patch by David Chisnall! 
llvm-svn: 52738
 2008-06-25 20:21:35 +00:00
Evan Cheng
5ed0e42cc3 Restore DeadArgElim back to 52570. It's breaking 447.dealII. 
llvm-svn: 52736
 2008-06-25 18:10:09 +00:00
Chris Lattner
ef1aa7c9db Switch the PPC backend and target-independent JIT to use the libsystem 
InvalidateInstructionCache method instead of calling through
a hook on the JIT.  This is a host feature, not a target feature.

llvm-svn: 52734
 2008-06-25 17:18:44 +00:00
Chris Lattner
a42eed01e2 fix compilation errors in my previous patch 
llvm-svn: 52733
 2008-06-25 17:17:53 +00:00
Chris Lattner
24c59453f6 Add a new InvalidateInstructionCache method to sys::Memory. 
llvm-svn: 52731
 2008-06-25 17:14:10 +00:00
Dan Gohman
8205b235b9 SimpleInstructionSelector is here no more. 
llvm-svn: 52725
 2008-06-25 16:38:59 +00:00
Duncan Sands
ab85726912 Add/complete support for integer and float 
select_cc and friends.  This code could be
factorized a bit but I'm not sure that it's
worth it.

llvm-svn: 52724
 2008-06-25 16:34:21 +00:00
Duncan Sands
93aacd5b48 Pacify gcc-4.3. 
llvm-svn: 52723
 2008-06-25 16:31:18 +00:00
Dan Gohman
404964dbc0 Remove the OrigVT member from AtomicSDNode, as it is redundant with 
the base SDNode's VTList.

llvm-svn: 52722
 2008-06-25 16:07:49 +00:00
Mon P Wang
7d89d61387 Added MemOperands to Atomic operations since Atomics touches memory. 
Added abstract class MemSDNode for any Node that have an associated MemOperand
Changed atomic.lcs => atomic.cmp.swap, atomic.las => atomic.load.add, and
atomic.lss => atomic.load.sub

llvm-svn: 52706
 2008-06-25 08:15:39 +00:00
Matthijs Kooijman
45bffc6580 Fix a (false) warning on darwin. 
llvm-svn: 52705
 2008-06-25 08:12:16 +00:00
Matthijs Kooijman
9b78534b71 Fix some cosmetics in comments. 
llvm-svn: 52704
 2008-06-25 08:10:21 +00:00
Evan Cheng
9a3db8fb91 - Use O(1) check of basic block size limit. 
- Avoid speculatively execute vector ops.

llvm-svn: 52703
 2008-06-25 07:50:12 +00:00
Chris Lattner
73b52018e9 Fix PR2488, a case where we deleted stack restores too aggressively. 
llvm-svn: 52702
 2008-06-25 05:59:28 +00:00
Evan Cheng
bab5925a0b Enable two-address remat by default. 
llvm-svn: 52701
 2008-06-25 01:16:38 +00:00
Owen Anderson
968d4e2444 Use push_back rather than operator[], which is incorrect in this cases. Unfortunately, this slow the testcase down a little bit, 
but only marginally.

llvm-svn: 52700
 2008-06-25 01:05:05 +00:00
Dan Gohman
a08868acb3 Append to the ActiveTimers std::vector before looking at the timer instead 
of after, so that any reallocation it does doesn't get counted for the pass
being timed.  This probably doesn't account for a timing discrepancy I was
looking into, but I'm fixing it anyway.

llvm-svn: 52693
 2008-06-24 22:07:07 +00:00
Dale Johannesen
fdf8fe6c03 Add v2f32 (MMX) type to X86. Support is primitive: 
load,store,call,return,bitcast.  This is enough to
make call and return work.

llvm-svn: 52691
 2008-06-24 22:01:44 +00:00
Owen Anderson
673cae8561 In ConstantArray::getAsString(), we know the size of the resultant string in advance so we can pre-allocate it and just fill in 
the entries.  This improves the time for the AsmPrinter on InstructionCombining.cpp from 0.4248s to 0.3370s.

llvm-svn: 52690
 2008-06-24 21:58:29 +00:00
Owen Anderson
8b2f51618a Use SmallVector instead of std::vector for a minor compile time improvement. 
llvm-svn: 52689
 2008-06-24 21:44:59 +00:00
Dan Gohman
b9384c5e87 Revert 52645, the loop unroller changes. It caused a regression in 252.eon. 
llvm-svn: 52688
 2008-06-24 20:44:42 +00:00
Dan Gohman
e9f0a28c64 Fix a typo in a comment. 
llvm-svn: 52687
 2008-06-24 18:00:21 +00:00
Dan Gohman
fcb2dc2dd6 Use const_cast instead of a C-style cast. 
llvm-svn: 52684
 2008-06-24 17:47:37 +00:00
Matthijs Kooijman
ff03ea8aeb Commit the new DeadArgElim pass again, this time with the gcc bootstrap failures fixed. 
Also add a testcase to reproduce the gcc bootstrap failure in very much reduced form.

llvm-svn: 52677
 2008-06-24 16:30:26 +00:00
Matthijs Kooijman
bb456f6b42 Rename a few variables to be more consistent. 
llvm-svn: 52672
 2008-06-24 09:14:10 +00:00
Evan Cheng
a62f5f0f82 If it's determined safe, remat MOV32r0 (i.e. xor r, r) and others as it is instead of using the longer MOV32ri instruction. 
llvm-svn: 52670
 2008-06-24 07:10:51 +00:00
Dan Gohman
29c5903a80 Fix some signed vs. unsigned issues in array and vector handling. 
llvm-svn: 52664
 2008-06-24 01:17:52 +00:00
Dan Gohman
9941a2dab3 Add a note about a potential PIC optimization. 
llvm-svn: 52663
 2008-06-24 00:53:07 +00:00
Dan Gohman
ebc59c90b7 Fixes for being compiled PIC on Linux. This isn't the most 
general solution possible, but it's a fairly simple one.
Based on a patch from the OpenGTL project!

llvm-svn: 52662
 2008-06-24 00:50:01 +00:00
Dan Gohman
0e992740a0 A brief survey of priority_queue usage in the tree turned this up 
as a questionable case, but the code isn't actually needed.

llvm-svn: 52657
 2008-06-23 23:51:16 +00:00
Bill Wendling
2501066409 This situation can occur: 
,------.
    |      |
    |      v
    |   t2 = phi ... t1 ...
    |      |
    |      v
    |   t1 = ...
    |  ... = ... t1 ...
    |      |
    `------'

where there is a use in a PHI node that's a predecessor to the defining
block. We don't want to mark all predecessors as having the value "alive" in
this case. Also, the assert was too restrictive and didn't handle this case.

llvm-svn: 52655
 2008-06-23 23:41:14 +00:00
Dan Gohman
95743e3078 Use the new PriorityQueue in ScheduleDAGList too, which also 
needs arbitrary-element removal.

llvm-svn: 52654
 2008-06-23 23:40:09 +00:00
Dan Gohman
11d367fd0c Use use_empty() instead of getNumUses(), avoiding a use list traversal. 
llvm-svn: 52651
 2008-06-23 23:23:49 +00:00
Owen Anderson
f2386cff4f Use getMBBEndIdx rather than assuming that the end is right after the last instruction in the block. 
llvm-svn: 52649
 2008-06-23 22:12:23 +00:00
Dan Gohman
24ec9f54bc Fix spelling and grammar in a comment. 
llvm-svn: 52648
 2008-06-23 22:11:52 +00:00
Dan Gohman
7f6ee1cd4b Revamp the loop unroller, extending it to correctly update PHI nodes 
in the presence of out-of-loop users of in-loop values and the trip
count is not a known multiple of the unroll count, and to be a bit
simpler overall. This fixes PR2253.

llvm-svn: 52645
 2008-06-23 21:29:41 +00:00
Evan Cheng
73bdede529 Remove option used to debug stack coloring bugs. It's no longer needed since stack coloring is now bug free. 
llvm-svn: 52644
 2008-06-23 21:24:32 +00:00
Evan Cheng
174f11c202 Disable PRE. It's breaking bootstrapping. 
llvm-svn: 52643
 2008-06-23 21:22:35 +00:00
Dan Gohman
71a0e81d0b Move a DenseMap's declaration outside of a loop, and just call 
clear() on each iteration. This avoids allocating and deallocating
all of DenseMap's memory on each iteration.

llvm-svn: 52642
 2008-06-23 21:15:00 +00:00
Evan Cheng
6e5a126667 Instead of adding an isSS field to LiveInterval to denote stack slot. Use top bit of 'reg' instead. If the top bit is set, than the LiveInterval represents a stack slot live interval. 
llvm-svn: 52639
 2008-06-23 21:03:19 +00:00
Wojciech Matyjewicz
1de28ac425 First step to fix PR2088. Implement routine to compute the 
multiplicative inverse of a given number. Modify udivrem to allow input and 
output pairs of arguments to overlap. Patch is based on the work by Chandler
Carruth.

llvm-svn: 52638
 2008-06-23 19:39:50 +00:00
Dan Gohman
5a929b928e Update the .cvs files. 
llvm-svn: 52637
 2008-06-23 18:43:26 +00:00
Dan Gohman
7492d685c7 Fix the types for NumElements variables, and add a comment 
explaining why empty array constants use ValID::createUndef().

llvm-svn: 52636
 2008-06-23 18:40:28 +00:00
Owen Anderson
0dcae02ad4 Tighten the conditions under which we do PRE, remove some unneeded code, and correct our preserved analyses list, since we 
do now change the CFG by splitting critical edges during PRE.

llvm-svn: 52631
 2008-06-23 17:49:45 +00:00
Chris Lattner
b992911447 minor tidying of comments. 
llvm-svn: 52630
 2008-06-23 17:11:23 +00:00