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Author SHA1 Message Date
Wesley Peck
66ff11fc09 Adding target specific calling conventions to support the MBlaze GCC function 
attributes "interrupt_handle" and "save_volatiles". Support for lowering these
correctly will be in an upcoming commit.

llvm-svn: 121888
 2010-12-15 20:14:09 +00:00
Dan Gohman
8b09daa387 Strengthen GetUnderlyingObject using InstructionSimplify. 
While LLVM's main design is that analysis code shouldn't
go out of its way to understand code which hasn't been
InstCombined, analysis utility routines like this can
find themselves being called in the middle of transform
passes when instcombine hasn't had a chance to run.

llvm-svn: 121886
 2010-12-15 20:10:26 +00:00
Dan Gohman
295ba3ab26 Move Value::getUnderlyingObject to be a standalone 
function so that it can live in Analysis instead of
VMCore.

llvm-svn: 121885
 2010-12-15 20:02:24 +00:00
Wesley Peck
be7405993f Add some special purpose register definitions to the MBlaze backend and cleanup some old, unused floating point register definitions. 
llvm-svn: 121882
 2010-12-15 19:35:36 +00:00
Owen Anderson
1bf81c7f14 Fix typo in r121875. 
llvm-svn: 121880
 2010-12-15 19:24:24 +00:00
Jim Grosbach
30e7f0d09e Tweak a few pseudo-inst pattern base classes. 
llvm-svn: 121878
 2010-12-15 19:03:16 +00:00
Nick Lewycky
44b582fb69 Clean up some of LVI: 
* mergeIn now uses constant folding for constants that are provably not-equal.
 * sink some sanity checks from the get*() methods into the mark*() methods, to ensure that we never have a constant/notconstant ConstantInt
 * some textual cleanups, whitespace changes, removing "else" after return, that sort of thing.

llvm-svn: 121877
 2010-12-15 18:57:18 +00:00
Jim Grosbach
8278d5692a The new t2LEApcrel* pseudo instructions need the size specified. 
rdar://8768390

llvm-svn: 121876
 2010-12-15 18:48:45 +00:00
Owen Anderson
202d654195 Implement cleanups suggested by Daniel. 
llvm-svn: 121875
 2010-12-15 18:48:27 +00:00
Dan Gohman
0b9ddf4485 Document some more AliasAnalysis infrastructure limitations. 
llvm-svn: 121874
 2010-12-15 18:45:20 +00:00
Jakob Stoklund Olesen
3cfea82733 Fix build. 
llvm-svn: 121872
 2010-12-15 18:07:48 +00:00
Jakob Stoklund Olesen
308656b955 Detect and enumerate bypass loops. 
Bypass loops have the current live range live through, but contain no uses or
defs. Splitting around a bypass loop can free registers for other uses inside
the loop by spilling the split range.

llvm-svn: 121871
 2010-12-15 17:49:52 +00:00
Jakob Stoklund Olesen
849388944e Separate SplitAnalysis::getSplitLoops(). 
This method returns the set of loops with uses that are candidates for
splitting.

llvm-svn: 121870
 2010-12-15 17:41:19 +00:00
Bob Wilson
3e4aa8ec69 Add a Neon intrinsic test generator. 
This is still a WIP.  It's already good enough to expose a few bugs, though.

llvm-svn: 121868
 2010-12-15 16:58:45 +00:00
Bob Wilson
114df2f88a Fix Neon intrinsic immediate range checking for some double-register operands. 
Some quad-register intrinsics with lane operands only take a double-register
operand for the vector containing the lane.  The valid range of lane numbers
is then half as big as you would expect from the quad-register type.
Note: This currently has no effect because those intrinsics are now handled
entirely in the header file using __builtin_shufflevector, which does its own
range checking, but I want to use this for generating tests.

llvm-svn: 121867
 2010-12-15 16:58:42 +00:00
Duncan Sands
2699fb1072 Move Sub simplifications and additional Add simplifications out of 
instcombine and into InstructionSimplify.

llvm-svn: 121861
 2010-12-15 14:07:39 +00:00
Duncan Sands
a9b837f7c7 If we detect that the instruction we are simplifying is unreachable, arrange for 
it to be replaced by undef rather than not replaced at all, the idea being that
this may reduce the amount of work done by whoever called InstructionSimplify.

llvm-svn: 121860
 2010-12-15 11:02:22 +00:00
Frits van Bommel
83b7c3773f Teach jump threading to "look through" a select when the branch direction of a terminator depends on it. 
When it sees a promising select it now tries to figure out whether the condition of the select is known in any of the predecessors and if so it maps the operands appropriately.

llvm-svn: 121859
 2010-12-15 09:51:20 +00:00
Bill Wendling
ab9df10ee5 Add fixups for Thumb LDR/STR instructions. 
llvm-svn: 121858
 2010-12-15 08:51:02 +00:00
Rafael Espindola
94d026d157 Relax alignment fragments. 
With this we don't need the EffectiveSize field anymore. Without that field
LayoutFragment only updates offsets and we don't need to invalidate the
current fragment when it is relaxed (only the ones following it).

This is also a very small improvement in the accuracy of the layout info as
we now use the after relaxation size immediately.

llvm-svn: 121857
 2010-12-15 08:45:53 +00:00
Rafael Espindola
f55f520a7a Patch by David Meyer to avoid a O(N^2) behaviour when relaxing fragments. 
Since we now don't update addresses so early, we might relax a bit more than
we need to. This is simillar to the issue in PR8467.

llvm-svn: 121856
 2010-12-15 07:39:29 +00:00
Chris Lattner
63d08e3444 add another overflow idiom 
llvm-svn: 121854
 2010-12-15 07:28:58 +00:00
Chris Lattner
ec899c30d9 add a note about overflow idiom recognition. 
llvm-svn: 121853
 2010-12-15 07:25:55 +00:00
Rafael Espindola
102a0b7b74 Generalize an assert. 
llvm-svn: 121851
 2010-12-15 07:12:24 +00:00
Chris Lattner
82b8cda077 add a shift/imul missed optimization 
llvm-svn: 121850
 2010-12-15 07:10:43 +00:00
Chris Lattner
d2022fee87 add a note about a SPEC hack that gcc mainline does. 
llvm-svn: 121849
 2010-12-15 06:38:24 +00:00
Chris Lattner
81815cd4db take care of some todos, transforming [us]mul_lohi into 
a wider mul if the wider mul is legal.

llvm-svn: 121848
 2010-12-15 06:04:19 +00:00
Chris Lattner
3bec2e7d0d merge two tests 
llvm-svn: 121847
 2010-12-15 05:58:59 +00:00
Chris Lattner
746d6a1f60 when transforming a MULHS into a wider MUL, there is no need to SRA the 
result, the top bits are truncated off anyway, just use SRL.

llvm-svn: 121846
 2010-12-15 05:51:39 +00:00
Chris Lattner
1499119975 make qsort predicate more conformant by returning 0 for equal values. 
llvm-svn: 121838
 2010-12-15 04:52:41 +00:00
Chris Lattner
e1ee3c537d various cleanups to tblgen, patch by Garrison Venn! 
llvm-svn: 121837
 2010-12-15 04:48:22 +00:00
Bill Wendling
0611f0ab0b Add mention that we support FreeBSD/amd64. 
llvm-svn: 121832
 2010-12-15 01:35:55 +00:00
Kevin Enderby
6b3ae489f8 Add some more MC tests for ARM arithmetic instructions that update or don't 
update the condition codes.  These come from my test generator and are just
the ones that MC currently assembles correctly.

llvm-svn: 121830
 2010-12-15 01:24:36 +00:00
Mikhail Glushenkov
7734f4702c Copy-pastos. 
llvm-svn: 121829
 2010-12-15 01:22:34 +00:00
Mikhail Glushenkov
a1dff84381 Remove ConvertToMAttrImpl, it became too '-march'-specific. 
llvm-svn: 121828
 2010-12-15 01:22:29 +00:00
Mikhail Glushenkov
85f1ed369c llvmc: Support -march arguments that should be forwarded to llc as -mcpu. 
llvm-svn: 121827
 2010-12-15 01:22:25 +00:00
Mikhail Glushenkov
8cf4959bf1 llvmc: Better -mfpu/-mcpu support for ARM & PPC. 
llvm-svn: 121826
 2010-12-15 01:22:20 +00:00
Mikhail Glushenkov
cc4f5dc841 llvmc: more complete -march table for ARM. 
llvm-svn: 121825
 2010-12-15 01:22:15 +00:00
Mikhail Glushenkov
62c42888bd llvmc: Support -mabi/-mfloat-abi. 
llvm-svn: 121824
 2010-12-15 01:22:10 +00:00
Mikhail Glushenkov
04ca263355 llvmc: Forward -march/-mcpu/-mtune to as & ld. 
llvm-svn: 121823
 2010-12-15 01:22:05 +00:00
Mikhail Glushenkov
2e471b81da llvmc: make switch options ZeroOrMore by default. 
llvm-svn: 121822
 2010-12-15 01:21:59 +00:00
Bill Wendling
258739db7e Reapply r121808 now that the missing patterns have been supplied. 
llvm-svn: 121820
 2010-12-15 01:03:19 +00:00
Bill Wendling
2764f25c78 Add some missing patterns now that tLDRB and tLDRH are split into reg and 
immediate versions.

llvm-svn: 121819
 2010-12-15 00:58:57 +00:00
Owen Anderson
de42e1136e Fix PR8790, another instance where unreachable code can cause instruction simplification to fail, 
this case involve a select that simplifies to itself.

llvm-svn: 121817
 2010-12-15 00:55:35 +00:00
Owen Anderson
df08ec80df Cleanup trailing whitespace. 
llvm-svn: 121816
 2010-12-15 00:52:44 +00:00
Bill Wendling
ad13b53237 Revert r121808 until I can fix the build. 
llvm-svn: 121815
 2010-12-15 00:04:00 +00:00
Jim Grosbach
386d8fc22c thumb adr fixup needs alignment just like the t2 version. 
llvm-svn: 121812
 2010-12-14 23:47:35 +00:00
Bill Wendling
ab3d22ba7f Comments and cleaning. 
llvm-svn: 121809
 2010-12-14 23:42:48 +00:00
Bill Wendling
2883bbb8c0 Make the ISel selections for LDR/STR the same as before the LDRr/LDRi split. In 
particular, we want

   ldr r2, [r3]

to be equivalent to

   ldr r2, [r3, #0]

and not

   ldr r2, [r3, r0]

llvm-svn: 121808
 2010-12-14 23:40:49 +00:00
Jakob Stoklund Olesen
48800c9689 Simplify RegAllocGreedy's use of register aliases. 
llvm-svn: 121807
 2010-12-14 23:38:19 +00:00