llvm-svn: 32534

obscure bugs affecting the X86 code generator.  I will reenable this
when fixed.

llvm-svn: 32524

creation calls.

llvm-svn: 32521

Rename getZeroExtend and getSignExtend to getZExt and getSExt to match
the the casting mnemonics in the rest of LLVM.

llvm-svn: 32514

llvm-svn: 32487

llvm-svn: 32486

llvm-svn: 32479

llvm-svn: 32477

llvm-svn: 32469

llvm-svn: 32468

llvm-svn: 32426

This implements Transforms/ScalarRepl/union-packed.ll

llvm-svn: 32422

 * Add support for promoting unions with fp values in them.  This produces
   our new int<->fp bitcast instructions, implementing
   Transforms/ScalarRepl/union-fp-int.ll

As an example, this allows us to compile this:

union intfloat { int i; float f; };
float invsqrt(const float arg_x) {
    union intfloat x = { .f = arg_x };
    const float xhalf = arg_x * 0.5f;
    x.i = 0x5f3759df - (x.i >> 1);
    return x.f * (1.5f - xhalf * x.f * x.f);
}

into:

_invsqrt:
        movss 4(%esp), %xmm0
        movd %xmm0, %eax
        sarl %eax
        movl $1597463007, %ecx
        subl %eax, %ecx
        movd %ecx, %xmm1
        mulss LCPI1_0, %xmm0
        mulss %xmm1, %xmm0
        movss LCPI1_1, %xmm2
        mulss %xmm1, %xmm0
        subss %xmm0, %xmm2
        movl 8(%esp), %eax
        mulss %xmm2, %xmm1
        movss %xmm1, (%eax)
        ret

instead of:

_invsqrt:
        subl $4, %esp
        movss 8(%esp), %xmm0
        movss %xmm0, (%esp)
        movl (%esp), %eax
        movl $1597463007, %ecx
        sarl %eax
        subl %eax, %ecx
        movl %ecx, (%esp)
        mulss LCPI1_0, %xmm0
        movss (%esp), %xmm1
        mulss %xmm1, %xmm0
        mulss %xmm1, %xmm0
        movss LCPI1_1, %xmm2
        subss %xmm0, %xmm2
        mulss %xmm2, %xmm1
        movl 12(%esp), %eax
        movss %xmm1, (%eax)
        addl $4, %esp
        ret

llvm-svn: 32418

MarkAliveBlocks.

llvm-svn: 32375

llvm-svn: 32333

llvm-svn: 32320

now cerr, cout, and NullStream resp.

llvm-svn: 32298

llvm-svn: 32288

llvm-svn: 32280

is 'unsigned'.

llvm-svn: 32279

passing false would make the asmprinter fail anyway.

llvm-svn: 32264

llvm-svn: 32252

7.48s.  This regression is due to unforseen consequences of the cast patch.

llvm-svn: 32209

for now.

llvm-svn: 32208

llvm-svn: 32166

llvm-svn: 32113

Transforms/InstCombine/2006-12-01-BadFPVectorXform.ll

llvm-svn: 32112

llvm-svn: 32051

llvm-svn: 32044

llvm-svn: 32043

llvm-svn: 32042

unsigned short swp(unsigned short a) {
       return ((a & 0xff00) >> 8 | (a & 0x00ff) << 8);
}

as an idiom for bswap.

llvm-svn: 32011

This implements InstCombine/cast.ll:test34.  It fires hundreds of times on
176.gcc.

llvm-svn: 32009

folding   seteq (bswap(x)), c -> seteq(x,bswap(c))

llvm-svn: 32006

llvm-svn: 31996

llvm-svn: 31977

producing code for "trunc to bool". This passes all tests on Linux.

llvm-svn: 31963

llvm-svn: 31941

The long awaited CAST patch. This introduces 12 new instructions into LLVM
to replace the cast instruction. Corresponding changes throughout LLVM are
provided. This passes llvm-test, llvm/test, and SPEC CPUINT2000 with the
exception of 175.vpr which fails only on a slight floating point output
difference.

llvm-svn: 31931

llvm-svn: 31925