document and hide two options.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37651 91177308-0d34-0410-b5e6-96231b3b80d8

describe an argument, hide it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37650 91177308-0d34-0410-b5e6-96231b3b80d8

silence a bogus warning Duraid ran into.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37649 91177308-0d34-0410-b5e6-96231b3b80d8

Add a new testcase for memory corruption issues.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37648 91177308-0d34-0410-b5e6-96231b3b80d8

Be careful to erase values from all of the appropriate sets when they're not needed anymore.  This fixes a few more memory-related issues.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37647 91177308-0d34-0410-b5e6-96231b3b80d8

Remember to clear the maximal sets between functions.

Thanks to Nicholas for valgrinding this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37646 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor GVNPRE to use a much smart method of uniquing value sets, and centralize a lot of the value numbering information.  No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37645 91177308-0d34-0410-b5e6-96231b3b80d8

Replace M_REMATERIALIZIBLE and the newly-added isOtherReMaterializableLoad
with a general target hook to identify rematerializable instructions. Some
instructions are only rematerializable with specific operands, such as loads
from constant pools, while others are always rematerializable. This hook
allows both to be identified as being rematerializable with the same
mechanism.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37644 91177308-0d34-0410-b5e6-96231b3b80d8

Replace TargetInstrInfo::CanBeDuplicated() with a M_NOT_DUPLICABLE bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37643 91177308-0d34-0410-b5e6-96231b3b80d8

Replace CanBeDuplicated() with a M_NOT_DUPLICABLE bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37642 91177308-0d34-0410-b5e6-96231b3b80d8

If a function is vararg, never pass inreg arguments in registers.  Thanks to
Anton for half of this patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37641 91177308-0d34-0410-b5e6-96231b3b80d8

add isVarArg to CCState

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37640 91177308-0d34-0410-b5e6-96231b3b80d8

add isvararg tracking to CCState

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37639 91177308-0d34-0410-b5e6-96231b3b80d8

testcase for PR1513

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37638 91177308-0d34-0410-b5e6-96231b3b80d8

New test case: identity operation of RHS / LHS of a VECTOR_SHUFFLE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37637 91177308-0d34-0410-b5e6-96231b3b80d8

Look for VECTOR_SHUFFLE that's identity operation on either LHS or RHS. This can happen before DAGCombiner catches it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37636 91177308-0d34-0410-b5e6-96231b3b80d8

Update docs for llvm.var.annotation intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37635 91177308-0d34-0410-b5e6-96231b3b80d8

Fix some fragile code wrt CFG edge updating.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37634 91177308-0d34-0410-b5e6-96231b3b80d8

Move CorrectExtraCFGEdges() from BranchFolding.cpp to a MachineBasicBlock method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37633 91177308-0d34-0410-b5e6-96231b3b80d8

Modify annotate intrinsic to take 2 additional args: file and line number.
Fix up Annotate attribute test case.
Fix DebugFilename.c test case to look for right file name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37632 91177308-0d34-0410-b5e6-96231b3b80d8

add helper

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37631 91177308-0d34-0410-b5e6-96231b3b80d8

Fix quotes in debug messages.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37630 91177308-0d34-0410-b5e6-96231b3b80d8

make ComputeTopDownOrdering significantly faster and use less stack space
by making it non-recursive

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37629 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37628 91177308-0d34-0410-b5e6-96231b3b80d8

Make BasicAliasAnalysis correctly register itself. Patch by Devang

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37627 91177308-0d34-0410-b5e6-96231b3b80d8

Make chain dependencies blue, in addition to being dashed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37626 91177308-0d34-0410-b5e6-96231b3b80d8

Define the pushq instruction for x86-64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37625 91177308-0d34-0410-b5e6-96231b3b80d8

Add keyword explicit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37624 91177308-0d34-0410-b5e6-96231b3b80d8

Properly remove duplicate instructions as result of diamond if-conversion. Other bug fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37623 91177308-0d34-0410-b5e6-96231b3b80d8

Cache the results of dependsOnInvoke()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37622 91177308-0d34-0410-b5e6-96231b3b80d8

Fix indentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37621 91177308-0d34-0410-b5e6-96231b3b80d8

Don't perform an expensive check if it's not necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37620 91177308-0d34-0410-b5e6-96231b3b80d8

ensure we don't regress on these tests.  We generate aweful code in x86-32 for
these though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37619 91177308-0d34-0410-b5e6-96231b3b80d8

XFAILing until I can fix properly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37618 91177308-0d34-0410-b5e6-96231b3b80d8

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37617 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1517:
Use SmallPtrSet instead of std::vector to eliminate duplicate uses in a
function generated with -gen-function. This prevents the output from having
multiple duplicate declarations of constants and gvals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37616 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1516:
When printing the uses of a function (-gen-function only), make sure to
include the constants referenced by intializers of global variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37615 91177308-0d34-0410-b5e6-96231b3b80d8

Call the correct function name. Patch from Stephane Letz.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37614 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37613 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase for MMX int to MMX register failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37612 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a failure to bit_convert from integer GPR to MMX register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37611 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test/Transforms/GVNPRE/2007-06-15-InvokeInst.ll by ignoring all instructions that depend on invokes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37610 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase where GVNPRE was getting confused by invoke instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37609 91177308-0d34-0410-b5e6-96231b3b80d8

Codegen support (stripped out) for the annotate attribute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37608 91177308-0d34-0410-b5e6-96231b3b80d8

Not every predicable block can be safely duplicated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37607 91177308-0d34-0410-b5e6-96231b3b80d8

Instructions with unique labels or embedded jumptables cannot be duplicated during ifcvt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37606 91177308-0d34-0410-b5e6-96231b3b80d8

Added CanBeDuplicated(). It returns true if an instruction can be safely duplicated (e.g. during ifcvt).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37605 91177308-0d34-0410-b5e6-96231b3b80d8

test case for annotate attribute

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37604 91177308-0d34-0410-b5e6-96231b3b80d8

Add local var annotation intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37603 91177308-0d34-0410-b5e6-96231b3b80d8

Fold a binary operator with constant operands when expanding code for a SCEV.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37602 91177308-0d34-0410-b5e6-96231b3b80d8

Fix CodeGen/X86/inline-asm-x-scalar.ll:test4, by retaining regclass info
for tied register constraints.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37601 91177308-0d34-0410-b5e6-96231b3b80d8

make this test harder, include a tied register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37600 91177308-0d34-0410-b5e6-96231b3b80d8

MachineInstr::isPredicable() is no longer needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37599 91177308-0d34-0410-b5e6-96231b3b80d8

No longer needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37598 91177308-0d34-0410-b5e6-96231b3b80d8

Workaround for PR1508.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37597 91177308-0d34-0410-b5e6-96231b3b80d8

Use SCEVConstant::get instead of SCEVUnknown::get to create an
integer constant SCEV.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37596 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test/Transforms/GVNPRE/2007-06-15-Looping.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37595 91177308-0d34-0410-b5e6-96231b3b80d8

Add a testcase where GVNPRE what getting confused by a loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37594 91177308-0d34-0410-b5e6-96231b3b80d8

Extra edges are deleted later if needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37593 91177308-0d34-0410-b5e6-96231b3b80d8

Use "ignore" rather than grep tricks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37592 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37591 91177308-0d34-0410-b5e6-96231b3b80d8

Allow small blocks to be duplicated to enable if-conversion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37590 91177308-0d34-0410-b5e6-96231b3b80d8

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37589 91177308-0d34-0410-b5e6-96231b3b80d8

add vector versions of this test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37588 91177308-0d34-0410-b5e6-96231b3b80d8

m_not should match vector not

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37587 91177308-0d34-0410-b5e6-96231b3b80d8

add a Constant::getAllOnesValue helper function, which works on integers
AND vectors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37586 91177308-0d34-0410-b5e6-96231b3b80d8

Enhance BinaryOperator::isNot to support vector not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37585 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37584 91177308-0d34-0410-b5e6-96231b3b80d8

testcase for PR1510

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37583 91177308-0d34-0410-b5e6-96231b3b80d8

delete some obviously dead vector operations, which deletes a few thousand
operations from Duraids example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37582 91177308-0d34-0410-b5e6-96231b3b80d8

No really, clear predcessors states.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37581 91177308-0d34-0410-b5e6-96231b3b80d8

If BB is predicated, invalidate its predecessor(s) which would if-convert it. It needs to be re-analyzed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37580 91177308-0d34-0410-b5e6-96231b3b80d8

Rename MVT::getVectorBaseType to MVT::getVectorElementType.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37579 91177308-0d34-0410-b5e6-96231b3b80d8

Do not treat FP_REG_KILL as terminator in branch analysis (X86).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37578 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37577 91177308-0d34-0410-b5e6-96231b3b80d8

Add a target hook to allow loads from constant pools to be rematerialized, and an
implementation for x86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37576 91177308-0d34-0410-b5e6-96231b3b80d8

Fix some stupid bugs that have effectively disabled if-conversion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37575 91177308-0d34-0410-b5e6-96231b3b80d8

Eliminate some redundant newlines in asm output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37574 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typos.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37573 91177308-0d34-0410-b5e6-96231b3b80d8

Add support to tablegen for specifying subregister classes on a per register class basis.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37572 91177308-0d34-0410-b5e6-96231b3b80d8

Handle blocks with 2 unconditional branches in AnalyzeBranch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37571 91177308-0d34-0410-b5e6-96231b3b80d8

Only correctly lower exception handing intrinsics if exception handling is
turned on.  Likewise for scanning of invokes to mark landing pads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37570 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37569 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37568 91177308-0d34-0410-b5e6-96231b3b80d8

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37567 91177308-0d34-0410-b5e6-96231b3b80d8

Typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37566 91177308-0d34-0410-b5e6-96231b3b80d8

Now if-converting all 4 variants of triangles.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37565 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37564 91177308-0d34-0410-b5e6-96231b3b80d8

Add a test where phi translation was producing a null result.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37563 91177308-0d34-0410-b5e6-96231b3b80d8

isReachableFromEntry() is not suitable for post dominator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37562 91177308-0d34-0410-b5e6-96231b3b80d8

Remove redundant check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37561 91177308-0d34-0410-b5e6-96231b3b80d8

Protect updateDFSNumbers()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37560 91177308-0d34-0410-b5e6-96231b3b80d8

Check A dominates B and vise versa first while searching for nearest
common dominator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37559 91177308-0d34-0410-b5e6-96231b3b80d8

one final bugfix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37558 91177308-0d34-0410-b5e6-96231b3b80d8

modernize example

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37557 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor some code, and fix test/Transforms/GVNPRE/2007-06-12-NoExit.ll by being more careful when using
post-dominator information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37556 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase where GVNPRE crashes on functions with no exit nodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37555 91177308-0d34-0410-b5e6-96231b3b80d8

Sink CmpInst's to their uses to reduce register pressure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37554 91177308-0d34-0410-b5e6-96231b3b80d8

Make DFS number manipulation methods private.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37553 91177308-0d34-0410-b5e6-96231b3b80d8

Make the run line for this test correct.  Thanks to Chris for spotting it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37552 91177308-0d34-0410-b5e6-96231b3b80d8