llvm-svn: 28321

it doesn't currently use/maintain the chain properly.  Also, make the
X86ISelLowering.cpp file 80-col clean.

llvm-svn: 28320

can just add lib/Target to TableGen includes.

llvm-svn: 28318

This code should be emitted after legalize, so it can't be in sdisel.

Note that the EmitFunctionEntryCode hook should be updated to operate on the
DAG.  The X86 backend is the only one currently using this hook.

llvm-svn: 28315

llvm-svn: 28314

for each argument.

llvm-svn: 28313

llvm-svn: 28311

llvm-svn: 28310

Add an additional catch block to ensure that this function can't throw any
exceptions, even one's we're not expecting.

llvm-svn: 28309

llvm-svn: 28307

llvm-svn: 28303

llvm-svn: 28301

it out of 'ExecutionEngine::create'.  This fixes a problem reported by coverity.

llvm-svn: 28293

llvm-svn: 28292

handle it.  Just silently fail.

llvm-svn: 28291

llvm-svn: 28290

llvm-svn: 28289

llvm-svn: 28287

llvm-svn: 28286

llvm-svn: 28284

llvm-svn: 28283

llvm-svn: 28279

llvm-svn: 28278

bitfield now gives this code:

_plus:
        lwz r2, 0(r3)
        rlwimi r2, r2, 0, 1, 31
        xoris r2, r2, 32768
        stw r2, 0(r3)
        blr

instead of this:

_plus:
        lwz r2, 0(r3)
        srwi r4, r2, 31
        slwi r4, r4, 31
        addis r4, r4, -32768
        rlwimi r2, r4, 0, 0, 0
        stw r2, 0(r3)
        blr

this can obviously still be improved.

llvm-svn: 28275

llvm-svn: 28274

currently very limited, but can be extended in the future.  For example,
we now compile:

uint %test30(uint %c1) {
        %c2 = cast uint %c1 to ubyte
        %c3 = xor ubyte %c2, 1
        %c4 = cast ubyte %c3 to uint
        ret uint %c4
}

to:

_xor:
        movzbl 4(%esp), %eax
        xorl $1, %eax
        ret

instead of:

_xor:
        movb $1, %al
        xorb 4(%esp), %al
        movzbl %al, %eax
        ret

More impressively, we now compile:

struct B { unsigned bit : 1; };
void xor(struct B *b) { b->bit = b->bit ^ 1; }

To (X86/PPC):

_xor:
        movl 4(%esp), %eax
        xorl $-2147483648, (%eax)
        ret
_xor:
        lwz r2, 0(r3)
        xoris r2, r2, 32768
        stw r2, 0(r3)
        blr

instead of (X86/PPC):

_xor:
        movl 4(%esp), %eax
        movl (%eax), %ecx
        movl %ecx, %edx
        shrl $31, %edx
        # TRUNCATE movb %dl, %dl
        xorb $1, %dl
        movzbl %dl, %edx
        andl $2147483647, %ecx
        shll $31, %edx
        orl %ecx, %edx
        movl %edx, (%eax)
        ret

_xor:
        lwz r2, 0(r3)
        srwi r4, r2, 31
        xori r4, r4, 1
        rlwimi r2, r4, 31, 0, 0
        stw r2, 0(r3)
        blr

This implements InstCombine/cast.ll:test30.

llvm-svn: 28273

Fix a nasty bug in the memcmp optimizer where we used the wrong variable!

llvm-svn: 28269

llvm-svn: 28268

llvm-svn: 28267

llvm-svn: 28266

llvm-svn: 28265

llvm-svn: 28264

that still fails (because all the register spill weights are inf), just grab
one.

llvm-svn: 28262

llvm-svn: 28261

llvm-svn: 28260

Bug identified by coverity.

llvm-svn: 28259

llvm-svn: 28258

llvm-svn: 28257

object is never deleted though.

llvm-svn: 28256

llvm-svn: 28255