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Author SHA1 Message Date
Dan Gohman
9e4db7f0bd Fix DSE to not eliminate volatile loads with no uses. 
llvm-svn: 50370
 2008-04-28 19:51:27 +00:00
Dale Johannesen
08671c6cac Don't try to convert PPC long double. 
llvm-svn: 50369
 2008-04-28 19:46:58 +00:00
Dan Gohman
6df962bf9a Evan pointed out that folding sext to zext may not be correct 
if the zext is not legal.

llvm-svn: 50368
 2008-04-28 18:47:17 +00:00
Dan Gohman
d67d878df0 Delete an unused constructor. 
llvm-svn: 50367
 2008-04-28 18:28:49 +00:00
Dan Gohman
733bb3e992 Add a comment to CreateRegForValue that clarifies the handling of 
aggregate types.

llvm-svn: 50366
 2008-04-28 18:19:43 +00:00
Dan Gohman
2f0476499c Rewrite the comments for RegsForValue and its members, and 
reorder some of the members for clarity.

llvm-svn: 50365
 2008-04-28 18:10:39 +00:00
Ted Kremenek
fd04109260 Add more alignment enums. 
llvm-svn: 50363
 2008-04-28 17:58:20 +00:00
Ted Kremenek
f1304a3762 Bug fix in BumpPtrAllocator: don't assume that all objects have the same alignment. "Bump" of the pointer for the next allocated object to be of the specified alignment. 
llvm-svn: 50362
 2008-04-28 17:58:07 +00:00
Dan Gohman
5d36cd74b0 Don't call size() on each iteration of the loop. 
llvm-svn: 50361
 2008-04-28 17:42:03 +00:00
Gordon Henriksen
0b2f0d3007 Expose parameter attributes via C bindings. 
Patch by Anders Johnsen!

llvm-svn: 50360
 2008-04-28 17:37:06 +00:00
Dan Gohman
0285c1e9bb Fix the SVOffset values for loads and stores produced by 
memcpy/memset expansion. It was a bug for the SVOffset value
to be used in the actual address calculations.

llvm-svn: 50359
 2008-04-28 17:15:20 +00:00
Dan Gohman
1b7238e6e4 Teach InstCombine's ComputeMaskedBits what SelectionDAG's 
ComputeMaskedBits knows about cttz, ctlz, and ctpop. Teach
SelectionDAG's ComputeMaskedBits what InstCombine's knows
about SRem. And teach them both some things about high bits
in Mul, UDiv, URem, and Sub. This allows instcombine and
dagcombine to eliminate sign-extension operations in
several new cases.

llvm-svn: 50358
 2008-04-28 17:02:21 +00:00
Dan Gohman
389a3ff9c7 Teach DAGCombine to convert (sext x) to (zext x) when the 
sign-bit of x is known to be zero.

llvm-svn: 50357
 2008-04-28 16:58:24 +00:00
Mikhail Glushenkov
4c358b3125 Add support for response files to the CommandLine library. 
llvm-svn: 50355
 2008-04-28 16:44:25 +00:00
Anton Korobeynikov
54791c2a43 Fix FP return for Win64 ABI 
llvm-svn: 50342
 2008-04-28 07:40:07 +00:00
Chris Lattner
c83326d89f Another collection of random cleanups. No functionality change. 
llvm-svn: 50341
 2008-04-28 07:16:35 +00:00
Chris Lattner
27fa922841 Remove the SmallVector ctor that converts from a SmallVectorImpl. This 
conversion open the door for many nasty implicit conversion issues, and
can be easily solved by initializing with (V.begin(), V.end()) when 
needed.

This patch includes many small cleanups for sdisel also.

llvm-svn: 50340
 2008-04-28 06:44:42 +00:00
Chris Lattner
89339f3a90 restore the copy ctor in SmallVector. This fixes serious 
errors I introduced in my last patch.

llvm-svn: 50338
 2008-04-28 06:32:08 +00:00
Chris Lattner
d6315b68f2 switch RegsForValue::Regs to be a SmallVector to avoid 
heap thrash on tiny (usually single-element) vectors.

llvm-svn: 50335
 2008-04-28 06:02:19 +00:00
Chris Lattner
a03159bc35 generalize SmallVector copy ctor, there is no requirement for 
the initialization vector to have the same fixed size, just the
same element type.

llvm-svn: 50334
 2008-04-28 06:01:06 +00:00
Chris Lattner
ede7e89144 Fix PR2256, yet another miscompilation in simplifycfg of i 
multiple return values.

Bill, please pull this into Tak.

llvm-svn: 50332
 2008-04-28 00:19:07 +00:00
Chris Lattner
0378973e09 several multiple-retval fixes for bugpoint. 
llvm-svn: 50331
 2008-04-28 00:04:58 +00:00
Chris Lattner
459f6ed05c move static function out of anon namespace, no functionality change. 
llvm-svn: 50330
 2008-04-27 23:48:12 +00:00
Chris Lattner
113de6b3a8 Another step to getting multiple result inline asm to work. 
llvm-svn: 50329
 2008-04-27 23:44:28 +00:00
Chris Lattner
bef7aa1d4b Allow asms to return multiple results by value. 
llvm-svn: 50328
 2008-04-27 23:33:55 +00:00
Anton Korobeynikov
1c5d228377 Properly lower vararg's FORMAL_ARGUMENTS node on win64 
llvm-svn: 50325
 2008-04-27 23:15:03 +00:00
Anton Korobeynikov
0df1f3bc6c Handle fp80 for win64 
llvm-svn: 50324
 2008-04-27 22:54:09 +00:00
Bill Wendling
2e2dab8423 Added support for: 
- defm and multiclass
- imbricatable multiline C style comment
- FIXME/TODO highlight in comment
- binary and hexadecimal number
- code using [{ }] is no highlighted as special (perhaps not the best
choice)
Patch by Cedric Venet!

llvm-svn: 50319
 2008-04-27 09:44:10 +00:00
Chris Lattner
0cd8c478f7 typo 
llvm-svn: 50316
 2008-04-27 01:49:46 +00:00
Chris Lattner
39a4281deb Implement a signficant optimization for inline asm: 
When choosing between constraints with multiple options,
like "ir", test to see if we can use the 'i' constraint and
go with that if possible.  This produces more optimal ASM in
all cases (sparing a register and an instruction to load it),
and fixes inline asm like this:

void test () {
  asm volatile (" %c0 %1 " : : "imr" (42), "imr"(14));
}

Previously we would dump "42" into a memory location (which
is ok for the 'm' constraint) which would cause a problem
because the 'c' modifier is not valid on memory operands.

Isn't it great how inline asm turns 'missed optimization'
into 'compile failed'??

Incidentally, this was the todo in 
PowerPC/2007-04-24-InlineAsm-I-Modifier.ll

Please do NOT pull this into Tak.

llvm-svn: 50315
 2008-04-27 00:37:18 +00:00
Chris Lattner
42aa4f9620 isa+cast -> dyn_cast 
llvm-svn: 50314
 2008-04-27 00:16:18 +00:00
Chris Lattner
b83aaaa855 Move a bunch of inline asm code out of line. 
llvm-svn: 50313
 2008-04-27 00:09:47 +00:00
Chris Lattner
b5bd654163 A few inline asm cleanups: 
- Make targetlowering.h fit in 80 cols.
  - Make LowerAsmOperandForConstraint const.
  - Make lowerXConstraint -> LowerXConstraint
  - Make LowerXConstraint return a const char* instead of taking a string byref.

llvm-svn: 50312
 2008-04-26 23:02:14 +00:00
Chris Lattner
1c98ff80c0 no need to implement this method and just have it call 
the default impl.

llvm-svn: 50311
 2008-04-26 22:59:59 +00:00
Chris Lattner
2798e42a9f When SRoA'ing a global variable, make sure the new globals get the 
appropriate alignment.  This fixes a miscompilation of 252.eon on
x86-64 (rdar://5891920).

Bill, please pull this into Tak.

llvm-svn: 50308
 2008-04-26 07:40:11 +00:00
Nate Begeman
1723f6af2b Feedback from chris 
llvm-svn: 50305
 2008-04-25 21:47:35 +00:00
Nate Begeman
acd7e1c464 Add a testcase for the recent "handle variable vector insert elt in mem" patch 
llvm-svn: 50303
 2008-04-25 21:26:59 +00:00
Dale Johannesen
cfba8d51b8 change comments per review 
llvm-svn: 50300
 2008-04-25 21:16:07 +00:00
Evan Cheng
db1497fa77 Update tests. 
llvm-svn: 50293
 2008-04-25 20:13:47 +00:00
Evan Cheng
318e7e042c Extract the lower 64-bit if a MMX value is passed in a XMM register. 
llvm-svn: 50292
 2008-04-25 20:13:28 +00:00
Evan Cheng
eaaec15b4f Fix illegal MMX_MOVDQ2Qrr pattern. vector_extract result must be a scalar value. 
llvm-svn: 50291
 2008-04-25 20:12:46 +00:00
Evan Cheng
11f101a800 Special handling for MMX values being passed in either GPR64 or lower 64-bits of XMM registers. 
llvm-svn: 50289
 2008-04-25 19:11:04 +00:00
Dan Gohman
c4b6768db4 Remove the code from CodeGenPrepare that moved getresult instructions 
to the block that defines their operands. This doesn't work in the
case that the operand is an invoke, because invoke is a terminator
and must be the last instruction in a block.

Replace it with support in SelectionDAGISel for copying struct values
into sequences of virtual registers.

llvm-svn: 50279
 2008-04-25 18:27:55 +00:00
Evan Cheng
0fe99f024d Fix MMX_MOVQ2DQrr pattern. It's illegal to do a bitconvert from a smaller type to a larger one. 
llvm-svn: 50278
 2008-04-25 18:19:54 +00:00
Chris Lattner
fb539f4468 new testcase 
llvm-svn: 50274
 2008-04-25 18:11:06 +00:00
Nate Begeman
f4adf0f05f Pull the code to perform an INSERT_VECTOR_ELT in memory out into its own 
function, and then use it to fix a bug in SplitVectorOp that expected inserts
to always have constant insertion indices.

llvm-svn: 50273
 2008-04-25 18:07:40 +00:00
Anton Korobeynikov
dad01d86e0 Update test 
llvm-svn: 50272
 2008-04-25 17:54:21 +00:00
Nate Begeman
928566cbfe Feedback from chris 
llvm-svn: 50271
 2008-04-25 17:45:52 +00:00
Chris Lattner
81742d7a8f add a note 
llvm-svn: 50267
 2008-04-25 17:25:00 +00:00
Evan Cheng
bbbe14502f 80 col violation. 
llvm-svn: 50266
 2008-04-25 17:21:40 +00:00