update comment

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31023 91177308-0d34-0410-b5e6-96231b3b80d8

Do not leak all of the SourceLineInfo objects.  Do not bother mallocing each
one separately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31022 91177308-0d34-0410-b5e6-96231b3b80d8

minor cleanups

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31021 91177308-0d34-0410-b5e6-96231b3b80d8

Trivial patch to speed up legalizing common i64 constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31020 91177308-0d34-0410-b5e6-96231b3b80d8

Fix CodeGen/PowerPC/2006-10-17-brcc-miscompile.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31019 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase, miscompilation of llvm with itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31018 91177308-0d34-0410-b5e6-96231b3b80d8

Fix printer for StoreSDNode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31017 91177308-0d34-0410-b5e6-96231b3b80d8

Reflect MemOpAddrMode change; added a helper to create pre-indexed load.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31016 91177308-0d34-0410-b5e6-96231b3b80d8

Split PRE_INDEXED to PRE_INC / PRE_DEC and similarly for POST_INDEXED.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31015 91177308-0d34-0410-b5e6-96231b3b80d8

expand ISD::SDIV, ISD::UDIV, ISD::SREM and ISD::UREM

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31014 91177308-0d34-0410-b5e6-96231b3b80d8

add the FPUnaryOp and DFPUnaryOp classes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31013 91177308-0d34-0410-b5e6-96231b3b80d8

add FABSS and FABSD

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31012 91177308-0d34-0410-b5e6-96231b3b80d8

Adding linkonce linkage codegeneration support for mingw32\cygwin
targets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31011 91177308-0d34-0410-b5e6-96231b3b80d8

cleanup some tests

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31010 91177308-0d34-0410-b5e6-96231b3b80d8

Make it simplier to dump DAGs while in DAGCombiner.  Remove a nasty optimization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31009 91177308-0d34-0410-b5e6-96231b3b80d8

remove extra [] in stores

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31008 91177308-0d34-0410-b5e6-96231b3b80d8

Enable deleting branches to successor blocks.  With the previous patches,
branch folding can now compile stuff like this:

void foo(int W, int X, int Y, int Z) {
  if (W & 1) {
    for (; X;--X) bar();
  } else if (W & 2) {
    for (; Y;--Y) bar();
  } else if (W & 4) {
    for (; Z;--Z) bar();
  } else if (W & 8) {
    for (; W;--W) bar();
  }

  if (W) {
    bar();
  }
}

contrived testcase where loops exits all end up merging together.  To have
the loop merges be:

...
        cmplw cr0, r30, r27
        bne cr0, LBB1_14        ;bb38
LBB1_16:        ;cond_next48.loopexit
        mr r27, r29
LBB1_20:        ;cond_next48
        cmplwi cr0, r27, 0
        beq cr0, LBB1_22        ;UnifiedReturnBlock
...

instead of:

...
        cmplw cr0, r30, r27
        bne cr0, LBB1_14        ;bb38
LBB1_16:        ;cond_next48.loopexit
        mr r27, r29
        b LBB1_20       ;cond_next48
LBB1_17:        ;cond_next48.loopexit1
        b LBB1_20       ;cond_next48
LBB1_18:        ;cond_next48.loopexit2
        b LBB1_20       ;cond_next48
LBB1_19:        ;cond_next48.loopexit3
LBB1_20:        ;cond_next48
        cmplwi cr0, r27, 0
        beq cr0, LBB1_22        ;UnifiedReturnBlock
...

This is CodeGen/PowerPC/branch-opt.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31006 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31005 91177308-0d34-0410-b5e6-96231b3b80d8

add support for inserting an uncond branch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31003 91177308-0d34-0410-b5e6-96231b3b80d8

initial implementation of addressing mode 5

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31002 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up interface to getGlobalLinkName.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31001 91177308-0d34-0410-b5e6-96231b3b80d8

Reenable this pass, fixing the bugs in it.
It now correctly deletes unreachable blocks and blocks that are empty.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31000 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure operand does have size and element type operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30999 91177308-0d34-0410-b5e6-96231b3b80d8

add the immediate to the Offset in eliminateFrameIndex

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30998 91177308-0d34-0410-b5e6-96231b3b80d8

Basic support for getGlobalLinkName.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30997 91177308-0d34-0410-b5e6-96231b3b80d8

add FSTD and FSTS

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30996 91177308-0d34-0410-b5e6-96231b3b80d8

add FCPYS and FCPYD

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30995 91177308-0d34-0410-b5e6-96231b3b80d8

Use S_debug for dwarf info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30994 91177308-0d34-0410-b5e6-96231b3b80d8

Proper fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30993 91177308-0d34-0410-b5e6-96231b3b80d8

One more try.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30992 91177308-0d34-0410-b5e6-96231b3b80d8

Undo Chris' last patch, it caused a regression.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30991 91177308-0d34-0410-b5e6-96231b3b80d8

Unbreak x86-64 build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30990 91177308-0d34-0410-b5e6-96231b3b80d8

Be careful when looking through a vbit_convert. Optimizing this:
(vector_shuffle
  (vbitconvert (vbuildvector (copyfromreg v4f32), 1, v4f32), 4, f32),
  (undef, undef, undef, undef), (0, 0, 0, 0), 4, f32)
to the
  vbitconvert
is a very bad idea.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30989 91177308-0d34-0410-b5e6-96231b3b80d8

add fdivs e fdivd

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30988 91177308-0d34-0410-b5e6-96231b3b80d8

expand ISD::SHL_PARTS, ISD::SRA_PARTS and ISD::SRL_PARTS

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30987 91177308-0d34-0410-b5e6-96231b3b80d8

Added a X86CompilationCallback variant which saves XMM argument registers for targets with SSE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30986 91177308-0d34-0410-b5e6-96231b3b80d8

Proper fix for rdar://problem/4770604   Thanks to Stuart Hastings!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30985 91177308-0d34-0410-b5e6-96231b3b80d8

Pass AliasAnalysis thru to DAGCombiner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30984 91177308-0d34-0410-b5e6-96231b3b80d8

add a ReplaceMBBInJumpTables method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30983 91177308-0d34-0410-b5e6-96231b3b80d8

Global name regression.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30982 91177308-0d34-0410-b5e6-96231b3b80d8

define the DFPBinOp class

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30981 91177308-0d34-0410-b5e6-96231b3b80d8

add the FPBinOp class

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30980 91177308-0d34-0410-b5e6-96231b3b80d8

define the Addr1BinOp class

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30979 91177308-0d34-0410-b5e6-96231b3b80d8

define the IntBinOp class and use it to implement the multiply instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30978 91177308-0d34-0410-b5e6-96231b3b80d8

fix assembly syntax

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30977 91177308-0d34-0410-b5e6-96231b3b80d8

implement LDRB, LDRSB, LDRH and LDRSH

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30976 91177308-0d34-0410-b5e6-96231b3b80d8

implement smull and umull

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30975 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid getting into an infinite loop when -disable-x86-shuffle-opti is specified.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30974 91177308-0d34-0410-b5e6-96231b3b80d8

SelectScalarSSELoad should call CanBeFoldedBy as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30973 91177308-0d34-0410-b5e6-96231b3b80d8

Passing isel root and use operands to ComplexPattern functions, these should do the usual load folding checks as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30972 91177308-0d34-0410-b5e6-96231b3b80d8

regenerate

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30971 91177308-0d34-0410-b5e6-96231b3b80d8

Produce a useful error message for Regression/Verifier/2006-10-15-AddrLabel.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30970 91177308-0d34-0410-b5e6-96231b3b80d8

testcase that causes the asmparser to assert

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30969 91177308-0d34-0410-b5e6-96231b3b80d8

label* is not a valid type, add an assertion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30968 91177308-0d34-0410-b5e6-96231b3b80d8

fix a buggy check that accidentally disabled this xform

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30967 91177308-0d34-0410-b5e6-96231b3b80d8

clarify

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30966 91177308-0d34-0410-b5e6-96231b3b80d8

Document the VAArg, and vector instruction opcodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30965 91177308-0d34-0410-b5e6-96231b3b80d8

Align stack size to DWORD boundary

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30964 91177308-0d34-0410-b5e6-96231b3b80d8

expand ISD::BRCOND

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30963 91177308-0d34-0410-b5e6-96231b3b80d8

fix some fp condition codes
use non trapping comparison instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30962 91177308-0d34-0410-b5e6-96231b3b80d8

Tidy up after truncstore changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30961 91177308-0d34-0410-b5e6-96231b3b80d8

One cyclic dag a day is good for ya...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30960 91177308-0d34-0410-b5e6-96231b3b80d8

Debug tweak.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30959 91177308-0d34-0410-b5e6-96231b3b80d8

Corrected load folding check. We need to start from the root of the sub-dag
being matched and ensure there isn't a non-direct path to the load (i.e. a
path that goes out of the sub-dag.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30958 91177308-0d34-0410-b5e6-96231b3b80d8

Start checking from the root of the matched sub-tree.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30957 91177308-0d34-0410-b5e6-96231b3b80d8

When checking if a load can be folded, we check if there is any non-direct
way to reach the load via any nodes that would be folded. Start from the
root of the matched sub-tree.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30956 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure that the node returned by SimplifySetCC is added to the worklist
so that it can be deleted if unused.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30955 91177308-0d34-0410-b5e6-96231b3b80d8

testcase for recent dag combiner patch.  Before the entry bb was:

_test:
        stwu r1, -80(r1)
        stw r1, 76(r1)
        mflr r11
        stw r11, 88(r1)
        rlwinm r2, r4, 0, 30, 31
        cmplwi cr7, r2, 2
        mfcr r2
        rlwinm r2, r2, 30, 31, 31
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

after it is:

_test:
        stwu r1, -80(r1)
        stw r1, 76(r1)
        mflr r11
        stw r11, 88(r1)
        rlwinm r2, r4, 0, 30, 31
        cmplwi cr0, r2, 2
        bgt cr0, LBB1_2 ;UnifiedReturnBlock

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30954 91177308-0d34-0410-b5e6-96231b3b80d8

fold setcc of a setcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30953 91177308-0d34-0410-b5e6-96231b3b80d8

When SimplifySetCC was moved to the DAGCombiner, it was never removed from
SelectionDAG and it has since bitrotted.  Remove the copy from SelectionDAG.
Next, remove the constant folding piece of DAGCombiner::SimplifySetCC into
a new FoldSetCC method which can be used by getNode() and SimplifySetCC.

This fixes obscure bugs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30952 91177308-0d34-0410-b5e6-96231b3b80d8

disable this pass for now, it's causing issues

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30951 91177308-0d34-0410-b5e6-96231b3b80d8

falling off the end of a function is ok with an unreachable instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30950 91177308-0d34-0410-b5e6-96231b3b80d8

testcase for recent selectiondag patch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30949 91177308-0d34-0410-b5e6-96231b3b80d8

Reduce the workload by not adding chain users to work list.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30948 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug where we incorrectly turned '(X & 0) == 0' into '(X & 0) >> -1',
which is undefined.  "0" isn't a power of 2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30947 91177308-0d34-0410-b5e6-96231b3b80d8

implement branch inspection/modification methods.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30946 91177308-0d34-0410-b5e6-96231b3b80d8

Merge ISD::TRUNCSTORE to ISD::STORE. Switch to using StoreSDNode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30945 91177308-0d34-0410-b5e6-96231b3b80d8

it is easier to implement these when they are virtual

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30944 91177308-0d34-0410-b5e6-96231b3b80d8

allow branch reversal to fail

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30943 91177308-0d34-0410-b5e6-96231b3b80d8

Corrected formatting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30942 91177308-0d34-0410-b5e6-96231b3b80d8

add the branch folding pass as a late cleanup pass for all targets.  For now
it just deletes empty MBB's.  Soon it will do more :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30941 91177308-0d34-0410-b5e6-96231b3b80d8

replace the existing branch inspection/modification APIs with something more
useful and general.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30940 91177308-0d34-0410-b5e6-96231b3b80d8

disable some objectionable code, maybe we can bring this pass to life

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30939 91177308-0d34-0410-b5e6-96231b3b80d8

remove some dead code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30938 91177308-0d34-0410-b5e6-96231b3b80d8

add note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30937 91177308-0d34-0410-b5e6-96231b3b80d8

set isBarrier correctly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30936 91177308-0d34-0410-b5e6-96231b3b80d8

Correctly handle instruction separators.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30935 91177308-0d34-0410-b5e6-96231b3b80d8

Expose method and ivars for measuring inline asm length properly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30934 91177308-0d34-0410-b5e6-96231b3b80d8

Move some warnings to debug mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30933 91177308-0d34-0410-b5e6-96231b3b80d8

add FNEGS and FNEGD

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30932 91177308-0d34-0410-b5e6-96231b3b80d8

Fix another dtor issue.  The function local statics in this function were
being destroyed at inconvenient times.  Switch to using non-local ManagedStatic
objects, which actually also speeds up ConstRules::get.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30931 91177308-0d34-0410-b5e6-96231b3b80d8

add SBCS and SUBS

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30930 91177308-0d34-0410-b5e6-96231b3b80d8

implement calls to functions that return long

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30929 91177308-0d34-0410-b5e6-96231b3b80d8

implement unordered floating point compares

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30928 91177308-0d34-0410-b5e6-96231b3b80d8

Workaround for templates

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30927 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up dump.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30926 91177308-0d34-0410-b5e6-96231b3b80d8

avoid a ctor/dtor issue with the ProgramName global.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30925 91177308-0d34-0410-b5e6-96231b3b80d8

simplify trivial function

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30924 91177308-0d34-0410-b5e6-96231b3b80d8

Really remove dead nodes from isel queue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30923 91177308-0d34-0410-b5e6-96231b3b80d8

shrink anon-ns and mark stuff static.  No functionality changes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30922 91177308-0d34-0410-b5e6-96231b3b80d8