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810ebb35c9
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36015 Commits

Author SHA1 Message Date
Dale Johannesen
810ebb35c9 Allow for more than one DBG_VALUE targeting the 
same dead instruction.

llvm-svn: 95890
 2010-02-11 18:23:23 +00:00
Dale Johannesen
406fad0bad Don't allow DBG_VALUE to affect codegen. 
llvm-svn: 95889
 2010-02-11 18:22:31 +00:00
Johnny Chen
7c088ab119 Added VCVT (between floating-point and fixed-point, VFP) for disassembly. 
A8.6.297

llvm-svn: 95885
 2010-02-11 18:17:16 +00:00
Johnny Chen
c6ca0de853 Added BKPT/tBKPT (breakpoint) to the instruction table for disassembly purpose. 
llvm-svn: 95884
 2010-02-11 18:12:29 +00:00
Jakob Stoklund Olesen
3aca1b0249 Use array_pod_sort instead of std::sort for improved code size. 
Use SmallVector instead of std::vector for better speed when indirectbr has
few successors.

llvm-svn: 95879
 2010-02-11 18:06:56 +00:00
Eric Christopher
2e0201ee18 Make sure that ConstantExpr offsets also aren't off of extern 
symbols.

Thanks to Duncan Sands for the testcase!

llvm-svn: 95877
 2010-02-11 17:44:04 +00:00
Johnny Chen
b1e50a8594 Add pseudo instruction TRAP for disassembly, which is encoded according to A5-21 
as the "Permanently UNDEFINED" instruction.

llvm-svn: 95873
 2010-02-11 17:14:31 +00:00
Bill Wendling
6e7cc490d4 Use .empty() instead of .size(). 
llvm-svn: 95871
 2010-02-11 10:37:57 +00:00
Chris Lattner
83ee8edc66 dont' call getX86RegNum on X86::RIP, it doesn't like that. This 
fixes the remaining x86-64 jit failures afaik.

llvm-svn: 95867
 2010-02-11 08:45:56 +00:00
Chris Lattner
c279bf31b7 fix a really nasty bug I introduced in r95693: r12 (and r12d, 
r12b, etc) also encodes to a R/M value of 4, which is just
as illegal as ESP/RSP for the non-sib version an address.

This fixes x86-64 jit miscompilations of a bunch of programs.

llvm-svn: 95866
 2010-02-11 08:41:21 +00:00
Chris Lattner
53d91ce3e1 Add and commonize encoder support for all immediates. 
Stub out some dummy fixups to make things work.

We can now emit fixups like this:
	subl	$20, %esp               ## encoding: [0x83,0xec,A]
                                        ##   fixup A - offset: 2, value: 20, kind: fixup_1byte_imm

Emitting $20 as a single-byte fixup to be later resolved
by the assembler is ridiculous of course (vs just emitting
the byte) but this is a failure of the matcher, which 
should be producing an imm of 20, not an MCExpr of 20.

llvm-svn: 95860
 2010-02-11 07:06:31 +00:00
Chris Lattner
2e2935e175 generalize EmitDisplacementField to work with any size 
and rename it to EmitImmediate.

llvm-svn: 95859
 2010-02-11 06:54:23 +00:00
Chris Lattner
1fe88248f8 eliminate the dead IsPCRel argument. 
llvm-svn: 95858
 2010-02-11 06:51:36 +00:00
Chris Lattner
1d5fbc4deb eliminate the dead "PCAdj" logic. 
llvm-svn: 95857
 2010-02-11 06:49:52 +00:00
Jeffrey Yasskin
ad23983452 Fix some of the memcheck errors found in the JIT unittests. 
llvm-svn: 95856
 2010-02-11 06:41:30 +00:00
Chris Lattner
a59eb7c09c Rename ValueRequiresCast to ShouldOptimizeCast, to better reflect 
what it does.  Enhance it to return false to optimizing vector
sign extensions from vector comparisions, which is the idiom used
to get a splatted vector for a vector comparison.

Doing this breaks vector-casts.ll, add some compensating 
transformations to handle the important case they cover without
depending on this canonicalization.

This fixes rdar://7434900 a serious pessimization of vector compares.

llvm-svn: 95855
 2010-02-11 06:26:33 +00:00
Chris Lattner
a087e6e82f Make DSE only scan blocks that are reachable from the entry 
block.  Other blocks may have pointer cycles that will crash
basicaa and other alias analyses.  In any case, there is no
point wasting cycles optimizing dead blocks.  This fixes 
rdar://7635088

llvm-svn: 95852
 2010-02-11 05:11:54 +00:00
Chris Lattner
733ffcdb1f Make jump threading honor x|undef -> true and x&undef -> false, 
instead of considering x|undef -> x, which may not be true.

llvm-svn: 95850
 2010-02-11 04:40:44 +00:00
Eric Christopher
9516309f55 Add ConstantExpr handling to Intrinsic::objectsize lowering. 
Update testcase accordingly now that we can optimize another
section.

llvm-svn: 95846
 2010-02-11 01:48:54 +00:00
Bill Wendling
2aa666c419 Fix to get it to compile. 
llvm-svn: 95840
 2010-02-11 01:15:27 +00:00
Bill Wendling
123c791ff5 Don't print out a default newline when emitting the section offset. There are 
almost always comments afterwards that need printing.

llvm-svn: 95839
 2010-02-11 01:13:02 +00:00
Jeffrey Yasskin
8a1ee8f852 Make it possible to create multiple JIT instances at the same time, by removing 
the global TheJIT and TheJITResolver variables.  Lazy compilation is supported
by a global map from a stub address to the JITResolver that knows how to
compile it.

Patch by Olivier Meurant!

llvm-svn: 95837
 2010-02-11 01:07:39 +00:00
Jakob Stoklund Olesen
3b5abdefc3 Reuse operand location when updating PHI instructions. 
Calling RemoveOperand is very expensive on huge PHI instructions. This makes
early tail duplication run twice as fast on the Firefox JavaScript
interpreter.

llvm-svn: 95832
 2010-02-11 00:34:33 +00:00
Jakob Stoklund Olesen
215d9f3898 Remove duplicate successors from indirectbr instructions before building the machine CFG. 
This makes early tail duplication run 60 times faster when compiling the Firefox
JavaScript interpreter, see PR6186.

llvm-svn: 95831
 2010-02-11 00:34:18 +00:00
Devang Patel
e87a8a944d Ignore dbg info intrinsics. 
llvm-svn: 95828
 2010-02-11 00:20:49 +00:00
Mon P Wang
c17e781f35 The previous fix of widening divides that trap was too fragile as it depends on custom 
lowering and requires that certain types exist in ValueTypes.h.  Modified widening to
check if an op can trap and if so, the widening algorithm will apply only the op on
the defined elements.  It is safer to do this in widening because the optimizer can't
guarantee removing unused ops in some cases.

llvm-svn: 95823
 2010-02-10 23:37:45 +00:00
Dale Johannesen
5f337b582f Ignore debug info one more place during coalescing. 
llvm-svn: 95819
 2010-02-10 23:04:09 +00:00
Bob Wilson
82d5534acc Delete dead PHI machine instructions. These can be created due to type 
legalization even when the IR-level optimizer has removed dead phis, such
as when the high half of an i64 value is unused on a 32-bit target.
I had to adjust a few test cases that had dead phis.
This is a partial fix for Radar 7627077.

llvm-svn: 95816
 2010-02-10 22:58:57 +00:00
Dale Johannesen
9d9478a53a Skip debug info in a couple of places. 
llvm-svn: 95814
 2010-02-10 21:47:48 +00:00
Bill Wendling
b288ec36ae Use an index instead of pointers into the vector. If the vector resizes, then 
the pointer values could be invalid.

llvm-svn: 95813
 2010-02-10 21:41:57 +00:00
Dale Johannesen
99090c9fe0 When I rewrote this loop per Chris' preference I 
changed its behavior.  Oops.

llvm-svn: 95811
 2010-02-10 21:41:41 +00:00
Eli Friedman
63e676c905 A few missed optimizations; the last one could have a significant impact on 
code with lots of bitfields.

llvm-svn: 95809
 2010-02-10 21:26:04 +00:00
Devang Patel
43cc7530be Strip new llvm.dbg.value intrinsic. 
llvm-svn: 95807
 2010-02-10 21:19:56 +00:00
Daniel Dunbar
b20be19ae6 MC/X86 AsmMatcher: Fix a use after free spotted by d0k, and de-XFAIL 
x86_32-encoding.s in on expectation of it passing.

llvm-svn: 95806
 2010-02-10 21:19:28 +00:00
Dan Gohman
296f6e4952 Minor whitespace cleanups. 
llvm-svn: 95801
 2010-02-10 20:42:57 +00:00
Dan Gohman
a18a12c897 Use an AssemblyAnnotatorWriter to clean up IVUsers' debug output. 
The "uses=" comments are just clutter in this context.

llvm-svn: 95799
 2010-02-10 20:42:37 +00:00
Dan Gohman
f2323826d2 Add a hook to AssemblyAnnotationWriter to allow custom info comments 
to be printed, in place of the familiar "uses=" comments.

llvm-svn: 95798
 2010-02-10 20:41:46 +00:00
Dan Gohman
efb42fa7c7 Fix several comments which had previously been "the the" where a 
different word was intended.

llvm-svn: 95795
 2010-02-10 20:04:19 +00:00
Johnny Chen
9851630ae6 Added NOP, DBG, SVC to the instruction table for disassembly purpose. 
llvm-svn: 95784
 2010-02-10 18:02:25 +00:00
Dan Gohman
92b6122204 Fix "the the" and similar typos. 
llvm-svn: 95781
 2010-02-10 16:03:48 +00:00
Chris Lattner
72dfdc8b8a emit some simple (and probably incorrect) fixups for symbolic 
displacement values.

llvm-svn: 95773
 2010-02-10 06:52:12 +00:00
Chris Lattner
6abaa9ee3c keep track of what the current byte being emitted is 
throughout the X86 encoder.

llvm-svn: 95771
 2010-02-10 06:41:02 +00:00
Chris Lattner
aa22470a1a simplify displacement handling, emit displacements by-operand 
even for the immediate case.  No functionality change.

llvm-svn: 95770
 2010-02-10 06:30:00 +00:00
Dan Gohman
ff8027e33a Canonicalize sizeof and alignof on pointer types to a canonical 
pointer type.

llvm-svn: 95769
 2010-02-10 06:13:07 +00:00
Daniel Dunbar
d2035fb242 MC: Switch MCFixup to just hold an MCExpr pointer instead of index into the 
MCInst it came from.

llvm-svn: 95767
 2010-02-10 04:47:08 +00:00
Evan Cheng
8bee7fb61d Now that ShrinkDemandedOps() is separated out from DAG combine. It sometimes leave some obvious nops which dag combine used to clean up afterwards e.g. (trunk (ext n)) -> n. Look for them and squash them. 
llvm-svn: 95757
 2010-02-10 02:17:34 +00:00
Daniel Dunbar
75df429af0 llvm-mc: Remove --show-fixups and always show as part of --show-encoding. 
Also, fix a silly memory leak.

llvm-svn: 95752
 2010-02-10 01:41:14 +00:00
Dale Johannesen
12262a957f Rewrite loop to suit Chris' preference. 
llvm-svn: 95749
 2010-02-10 01:31:26 +00:00
Chris Lattner
72156036b9 fix a layering violation: VirtRegRewriter.cpp shouldn't use AsmPrinter.h. 
llvm-svn: 95748
 2010-02-10 01:23:18 +00:00
Evan Cheng
e0e620c006 Remove duplicated #include. 
llvm-svn: 95747
 2010-02-10 01:22:57 +00:00