No functionality change.

llvm-svn: 97793

llvm-svn: 97792

node which has a flag.  That flag in turn was used by an
already-selected adde which turned into an ADC32ri8 which
used a selected load which was chained to the load we
folded.  This flag use caused us to form a cycle.  Fix
this by not ignoring chains in IsLegalToFold even in
cases where the isel thinks it can.

llvm-svn: 97791

llvm-svn: 97790

llvm-svn: 97789

llvm-svn: 97788

As in 'llvmc -O2 -O2 test.c'.

llvm-svn: 97787

Allows us to find executables that are in the same directory.

llvm-svn: 97786

llvm-svn: 97782

llvm-svn: 97781

llvm-svn: 97780

llvm-svn: 97779

rounding correctly. This implementation is a generalization of
the x86_64 code in compiler-rt.

This fixes rdar://7683708.

llvm-svn: 97778

llvm-svn: 97776

Add missing break for Intrinsic::objectsize case. It was falling through to the following Intrinsic::bswap code. I have no idea why it wasn't breaking stuff.

llvm-svn: 97774

llvm-svn: 97772

Don't build any of the dynamic library stuff on cygwin/mingw.

llvm-svn: 97771

llvm-svn: 97770

llvm-svn: 97769

llvm-svn: 97768

This code:

float floatingPointComparison(float x, float y) {
    double product = (double)x * y;
    if (product == 0.0)
        return product;
    return product - 1.0;
}

produces this:

_floatingPointComparison:
0000000000000000        cvtss2sd        %xmm1,%xmm1
0000000000000004        cvtss2sd        %xmm0,%xmm0
0000000000000008        mulsd           %xmm1,%xmm0
000000000000000c        pxor            %xmm1,%xmm1
0000000000000010        ucomisd         %xmm1,%xmm0
0000000000000014        jne             0x00000004
0000000000000016        jp              0x00000002
0000000000000018        jmp             0x00000008
000000000000001a        addsd           0x00000006(%rip),%xmm0
0000000000000022        cvtsd2ss        %xmm0,%xmm0
0000000000000026        ret

The "jne/jp/jmp" sequence can be reduced to this instead:

_floatingPointComparison:
0000000000000000        cvtss2sd        %xmm1,%xmm1
0000000000000004        cvtss2sd        %xmm0,%xmm0
0000000000000008        mulsd           %xmm1,%xmm0
000000000000000c        pxor            %xmm1,%xmm1
0000000000000010        ucomisd         %xmm1,%xmm0
0000000000000014        jp              0x00000002
0000000000000016        je              0x00000008
0000000000000018        addsd           0x00000006(%rip),%xmm0
0000000000000020        cvtsd2ss        %xmm0,%xmm0
0000000000000024        ret

for a savings of 2 bytes.

This xform can happen when we recognize that jne and jp jump to the same "true"
MBB, the unconditional jump would jump to the "false" MBB, and the "true" branch
is the fall-through MBB.

llvm-svn: 97766

llvm-svn: 97765

llvm-svn: 97764

llvm-svn: 97763

of either sxtb16 or uxtb16, and the unified syntax does not specify ".w".

llvm-svn: 97760

positive where pointers would be leaked on llvm_shutdown.

llvm-svn: 97759

as nounwind are marked with a -1 call-site value. This is necessary to, for
example, correctly process exceptions thrown from within an "unexpected"
execption handler (see SingleSource/Regression/C++/EH/expection_spec_test.cpp).

llvm-svn: 97757

frame pointer.

llvm-svn: 97755

llvm-svn: 97752

llvm-svn: 97747

an undef value.  This is only going to come up for bugpoint-reduced tests --
correct programs will not access memory at undefined addresses -- so it's not
worth the effort of doing anything more aggressive.

llvm-svn: 97745

We need this so can not bake DESTDIR into the O'Caml symlinks.

llvm-svn: 97743

These instructions technically define AL,AH, but a trick in X86ISelDAGToDAG
reads AX in order to avoid reading AH with a REX instruction.

Fix PR6489.

llvm-svn: 97742

clobber registers in a different order.

llvm-svn: 97741

llvm-svn: 97740

register if it isn't possible to match the indexes *and* the base.
This fixes some fast isel rejects of load instructions on oggenc.

llvm-svn: 97739

llvm-svn: 97738

just count references to it from JIT output to decide when to destroy it.  This
patch waits to destroy the JIT's memory of a stub until the Function it refers
to is destroyed.  External function stubs and GVIndirectSyms aren't destroyed
until the JIT itself is.

llvm-svn: 97737

llvm-svn: 97735

Instruction (PLI) for disassembly only.

According to A8.6.120 PLI (immediate, literal), for example, different
instructions are generated for "pli [pc, #0]" and "pli [pc, #-0"].  The
disassembler solves it by mapping -0 (negative zero) to -1, -1 to -2, ..., etc.

llvm-svn: 97731