(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.

llvm-svn: 30989

llvm-svn: 30988

llvm-svn: 30987

llvm-svn: 30986

llvm-svn: 30985

llvm-svn: 30984

llvm-svn: 30983

llvm-svn: 30982

llvm-svn: 30981

llvm-svn: 30980

llvm-svn: 30979

llvm-svn: 30978

llvm-svn: 30977

llvm-svn: 30976

llvm-svn: 30975

llvm-svn: 30974

llvm-svn: 30973

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

llvm-svn: 30972

llvm-svn: 30971

llvm-svn: 30970

llvm-svn: 30969

llvm-svn: 30968

llvm-svn: 30967

llvm-svn: 30966

llvm-svn: 30965

llvm-svn: 30964

llvm-svn: 30963

use non trapping comparison instructions

llvm-svn: 30962

llvm-svn: 30961

llvm-svn: 30960

llvm-svn: 30959

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.)

llvm-svn: 30958

llvm-svn: 30957

way to reach the load via any nodes that would be folded. Start from the
root of the matched sub-tree.

llvm-svn: 30956

so that it can be deleted if unused.

llvm-svn: 30955

_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

llvm-svn: 30954

llvm-svn: 30953

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.

llvm-svn: 30952

llvm-svn: 30951

llvm-svn: 30950