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19114 Commits

Author SHA1 Message Date
Devang Patel
f57b9f4d5d Fix quotes in debug messages. 
llvm-svn: 37630
 2007-06-18 21:32:29 +00:00
Chris Lattner
5b93ff84b9 make ComputeTopDownOrdering significantly faster and use less stack space 
by making it non-recursive

llvm-svn: 37629
 2007-06-18 21:28:10 +00:00
Dan Gohman
5db3ad4b32 In SCEVAddExpr::get, skip over any cast operands before looking for nested 
add operands after constant operands. The recent change to recognize
sign-extend expressions caused this to be exposed more often.

llvm-svn: 37628
 2007-06-18 19:30:09 +00:00
Anton Korobeynikov
76361958e8 Make BasicAliasAnalysis correctly register itself. Patch by Devang 
llvm-svn: 37627
 2007-06-18 17:13:29 +00:00
Dan Gohman
46f036ccb0 Make chain dependencies blue, in addition to being dashed. 
llvm-svn: 37626
 2007-06-18 15:30:16 +00:00
Dan Gohman
bff1054303 Define the pushq instruction for x86-64. 
llvm-svn: 37625
 2007-06-18 14:12:56 +00:00
Evan Cheng
b3cefc0824 Properly remove duplicate instructions as result of diamond if-conversion. Other bug fixes. 
llvm-svn: 37623
 2007-06-18 08:37:25 +00:00
Owen Anderson
58098f3560 Cache the results of dependsOnInvoke() 
llvm-svn: 37622
 2007-06-18 04:42:29 +00:00
Owen Anderson
8956588783 Fix indentation. 
llvm-svn: 37621
 2007-06-18 04:31:21 +00:00
Owen Anderson
c45b435273 Don't perform an expensive check if it's not necessary. 
llvm-svn: 37620
 2007-06-18 04:30:44 +00:00
Bill Wendling
94f3474832 Revert patch. It regresses: 
define double @test2(i64 %A) {
   %B = bitcast i64 %A to double
   ret double %B
}

$ llvm-as < t.ll | llc -march=x86-64

before:

         .align  4
         .globl  _test2
_test2:
         movd %rdi, %xmm0
         ret

after:

_test2:
         subq $8, %rsp
         movq %rdi, (%rsp)
         movsd (%rsp), %xmm0
         addq $8, %rsp
         ret

llvm-svn: 37617
 2007-06-16 23:57:15 +00:00
Evan Cheng
1732a41371 Really turn if-converter loose: 
1. Consider all possible ifcvt cases at once. No longer restricted to bottom
   up iterative approach.
2. Sort all possible cases based on a cost function. Perform the most profitable
   ones first invalidate others that target the same blocks.
3. Fixed a number of bugs related to block duplication.

llvm-svn: 37613
 2007-06-16 09:34:52 +00:00
Bill Wendling
a1f8f0aa97 Fix a failure to bit_convert from integer GPR to MMX register. 
llvm-svn: 37611
 2007-06-16 06:17:31 +00:00
Owen Anderson
0c8b051523 Fix test/Transforms/GVNPRE/2007-06-15-InvokeInst.ll by ignoring all instructions that depend on invokes. 
llvm-svn: 37610
 2007-06-16 00:26:54 +00:00
Tanya Lattner
4c078c1ace Codegen support (stripped out) for the annotate attribute. 
llvm-svn: 37608
 2007-06-15 22:26:58 +00:00
Evan Cheng
759b3cca3c Not every predicable block can be safely duplicated. 
llvm-svn: 37607
 2007-06-15 21:18:05 +00:00
Evan Cheng
e6d0631c68 Instructions with unique labels or embedded jumptables cannot be duplicated during ifcvt. 
llvm-svn: 37606
 2007-06-15 21:15:00 +00:00
Dan Gohman
1c73ccb4d3 Fold a binary operator with constant operands when expanding code for a SCEV. 
llvm-svn: 37602
 2007-06-15 19:21:55 +00:00
Chris Lattner
c08e8abb53 Fix CodeGen/X86/inline-asm-x-scalar.ll:test4, by retaining regclass info 
for tied register constraints.

llvm-svn: 37601
 2007-06-15 19:11:01 +00:00
Evan Cheng
88c463eb8c MachineInstr::isPredicable() is no longer needed. 
llvm-svn: 37599
 2007-06-15 19:06:07 +00:00
Duncan Sands
deef6fe78b Workaround for PR1508. 
llvm-svn: 37597
 2007-06-15 19:04:19 +00:00
Dan Gohman
a3ea76f018 Use SCEVConstant::get instead of SCEVUnknown::get to create an 
integer constant SCEV.

llvm-svn: 37596
 2007-06-15 18:00:55 +00:00
Owen Anderson
5a2d597072 Fix test/Transforms/GVNPRE/2007-06-15-Looping.ll 
llvm-svn: 37595
 2007-06-15 17:55:15 +00:00
Evan Cheng
a6504bc2e0 Extra edges are deleted later if needed. 
llvm-svn: 37593
 2007-06-15 17:34:48 +00:00
Dan Gohman
838ba27094 Add a SCEV class and supporting code for sign-extend expressions. 
This created an ambiguity for expandInTy to decide when to use
sign-extension or zero-extension, but it turns out that most of its callers
don't actually need a type conversion, now that LLVM types don't have
explicit signedness. Drop expandInTy in favor of plain expand, and change
the few places that actually need a type conversion to do it themselves.

llvm-svn: 37591
 2007-06-15 14:38:12 +00:00
Evan Cheng
f4d3d695b2 Allow small blocks to be duplicated to enable if-conversion. 
llvm-svn: 37590
 2007-06-15 07:36:12 +00:00
Chris Lattner
3a979f2fa5 Generalize many transforms to work on ~ of vectors in addition to ~ of 
integer ops.  This implements Transforms/InstCombine/and-or-not.ll
test3/test4, and finishes off PR1510

llvm-svn: 37589
 2007-06-15 06:23:19 +00:00
Chris Lattner
145fdc7e2a add a Constant::getAllOnesValue helper function, which works on integers 
AND vectors.

llvm-svn: 37586
 2007-06-15 06:10:53 +00:00
Chris Lattner
c2985cea59 Enhance BinaryOperator::isNot to support vector not. 
llvm-svn: 37585
 2007-06-15 06:04:24 +00:00
Chris Lattner
6c32b44b4c Implement two xforms: 
1. ~(~X | Y) === (X & ~Y)
2. (A|B) & ~(A&B) -> A^B

This allows us to transform  ~(~(a|b) | (a&b)) -> a^b.

This implements PR1510 for scalar values.

llvm-svn: 37584
 2007-06-15 05:58:24 +00:00
Chris Lattner
96c6cf8b89 delete some obviously dead vector operations, which deletes a few thousand 
operations from Duraids example.

llvm-svn: 37582
 2007-06-15 05:26:55 +00:00
Evan Cheng
6f348e1c75 No really, clear predcessors states. 
llvm-svn: 37581
 2007-06-14 23:34:09 +00:00
Evan Cheng
b1b1914582 If BB is predicated, invalidate its predecessor(s) which would if-convert it. It needs to be re-analyzed. 
llvm-svn: 37580
 2007-06-14 23:13:19 +00:00
Dan Gohman
2fd7d26df8 Rename MVT::getVectorBaseType to MVT::getVectorElementType. 
llvm-svn: 37579
 2007-06-14 22:58:02 +00:00
Dale Johannesen
62f49dd524 Do not treat FP_REG_KILL as terminator in branch analysis (X86). 
llvm-svn: 37578
 2007-06-14 22:03:45 +00:00
Evan Cheng
26d68261ae Fix typo. 
llvm-svn: 37577
 2007-06-14 21:26:08 +00:00
Dan Gohman
35f2b4d716 Add a target hook to allow loads from constant pools to be rematerialized, and an 
implementation for x86.

llvm-svn: 37576
 2007-06-14 20:50:44 +00:00
Evan Cheng
a2c2479e22 Fix some stupid bugs that have effectively disabled if-conversion. 
llvm-svn: 37575
 2007-06-14 20:28:52 +00:00
Dan Gohman
74c92798d8 Eliminate some redundant newlines in asm output. 
llvm-svn: 37574
 2007-06-14 15:00:27 +00:00
Christopher Lamb
68017d151b Add support to tablegen for specifying subregister classes on a per register class basis. 
llvm-svn: 37572
 2007-06-13 22:20:15 +00:00
Dale Johannesen
7e3253f115 Handle blocks with 2 unconditional branches in AnalyzeBranch. 
llvm-svn: 37571
 2007-06-13 17:59:52 +00:00
Duncan Sands
51e6294637 Only correctly lower exception handing intrinsics if exception handling is 
turned on.  Likewise for scanning of invokes to mark landing pads.

llvm-svn: 37570
 2007-06-13 16:53:21 +00:00
Dan Gohman
6415b2548e Introduce new SelectionDAG node opcodes VEXTRACT_SUBVECTOR and 
VCONCAT_VECTORS. Use these for CopyToReg and CopyFromReg legalizing in
the case that the full register is to be split into subvectors instead
of scalars. This replaces uses of VBIT_CONVERT to present values as
vector-of-vector types in order to make whole subvectors accessible via
BUILD_VECTOR and EXTRACT_VECTOR_ELT.

This is in preparation for adding extended ValueType values, where
having vector-of-vector types is undesirable.

llvm-svn: 37569
 2007-06-13 15:12:02 +00:00
Dan Gohman
3bc1455d49 When creating CopyFromReg nodes, always use legal types. And use the 
correct types for the result vector, even though it is currently bitcasted
to a different type immediately.

llvm-svn: 37568
 2007-06-13 14:55:16 +00:00
Duncan Sands
32eaa9b30a The fix that was applied for PR1224 stops the compiler 
crashing but breaks exception handling.  The problem
described in PR1224 is that invoke is a terminator that
can produce a value.  The value may be needed in other
blocks.  The code that writes to registers values needed
in other blocks runs before terminators are lowered (in
this case invoke) so asserted because the value was not
yet available.  The fix that was applied was to do invoke
lowering earlier, before writing values to registers.

The problem this causes is that the code to copy values
to registers can be output after the invoke call.  If
an exception is raised and control is passed to the
landing pad then this copy-code will never execute.  If
the value is needed in some code path reached via the
landing pad then that code will get something bogus.

So revert the original fix and simply skip invoke values
in the general copying to registers code.  Instead copy
the invoke value to a register in the invoke lowering code.

llvm-svn: 37567
 2007-06-13 05:51:31 +00:00
Evan Cheng
d4e9443a78 Typo 
llvm-svn: 37566
 2007-06-13 00:04:00 +00:00
Evan Cheng
d5aaab210c Now if-converting all 4 variants of triangles. 
llvm-svn: 37565
 2007-06-12 23:54:05 +00:00
Owen Anderson
67084c3848 Fix test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll 
llvm-svn: 37564
 2007-06-12 22:43:57 +00:00
Devang Patel
fbde93ba1f isReachableFromEntry() is not suitable for post dominator. 
llvm-svn: 37562
 2007-06-12 17:50:25 +00:00
Devang Patel
b4e2a776cb Remove redundant check. 
llvm-svn: 37561
 2007-06-12 17:35:20 +00:00