llvm-svn: 35822

Handle Argument or Undef as an incoming PHI value.

llvm-svn: 35821

llvm-svn: 35820

llvm-svn: 35819

llvm-svn: 35792

Transforms/InstCombine/vec_insertelt.ll and fixes PR1286.

We now compile the code from that bug into:

_foo:
        movl 4(%esp), %eax
        movdqa (%eax), %xmm0
        movl 8(%esp), %ecx
        psllw (%ecx), %xmm0
        movdqa %xmm0, (%eax)
        ret

instead of:

_foo:
        subl $4, %esp
        movl %ebp, (%esp)
        movl %esp, %ebp
        movl 12(%ebp), %eax
        movdqa (%eax), %xmm0
        #IMPLICIT_DEF %eax
        pinsrw $2, %eax, %xmm0
        xorl %ecx, %ecx
        pinsrw $3, %ecx, %xmm0
        pinsrw $4, %eax, %xmm0
        pinsrw $5, %ecx, %xmm0
        pinsrw $6, %eax, %xmm0
        pinsrw $7, %ecx, %xmm0
        movl 8(%ebp), %eax
        movdqa (%eax), %xmm1
        psllw %xmm0, %xmm1
        movdqa %xmm1, (%eax)
        movl %ebp, %esp
        popl %ebp
        ret

woo :)

llvm-svn: 35788

isReachableFromEntry
test to ETForest to factor a common test out of code.

llvm-svn: 35786

llvm-svn: 35768

llvm-svn: 35765

llvm-svn: 35763

Add a new xform to simplify (A&B)|(~A&C).  THis implements InstCombine/or2.ll:test1

llvm-svn: 35760

fwrite optimizer.

llvm-svn: 35758

llvm-svn: 35757

just return the string itself.

llvm-svn: 35755

llvm-svn: 35754

Fix some miscompilations in fprintf optimizer.

llvm-svn: 35753

and Prolangs-C/cdecl

llvm-svn: 35749

ETForest updating mechanisms don't work as I thought they did.  These changes
will be reapplied once the issue is worked out.

llvm-svn: 35741

llvm-svn: 35734

llvm-svn: 35731

continuing work on PR1171.

llvm-svn: 35730

llvm-svn: 35729

work for PR 1171.

llvm-svn: 35728

on PR1171.

llvm-svn: 35726

llvm-svn: 35724

This is the beginning of work for PR1171.

llvm-svn: 35720

llvm-svn: 35719

llvm-svn: 35718

first and then range testing second.

llvm-svn: 35715

llvm-svn: 35714

llvm-svn: 35713

llvm-svn: 35712

llvm-svn: 35711

llvm-svn: 35710

llvm-svn: 35709

llvm-svn: 35708

llvm-svn: 35707

SimplifyLibCalls/2007-04-06-strchr-miscompile.ll and PR1307

llvm-svn: 35706

llvm-svn: 35704

the start index of the array as well as the length.  No functionality change.

llvm-svn: 35703